The first edition of this guide was published in 1950.Published by: WMO ; 2018 (2018 Edition)
The first edition of this guide was published in 1950.
Notes: Online archive (from 1950 onward) is available for logged-in users. Not registered yet? Click here or contact library(at)wmo.int (please replace at by @). - Other parts in preparation.
Collection(s) and Series: WMO- No. 8
Language(s): English; Other Languages: French, Spanish, Russian, Arabic
Format: Digital (Free)
ISBN (or other code): 978-92-63-10008-5
Tags: Observations ; Meteorological instrument ; Hydrometeorological instrument ; Automated Weather Observing System (AWOS) ; Global Space-based Inter-Calibration System (GSICS) ; WMO Integrated Global Observing System (WIGOS) ; Methodology ; Guide ; Meteorology ; OBS - Personnel installing and maintaining instrumentation ; OBS - Personnel managing observing programmes and networks ; OBS - Personnel performing instrument calibrations ; OBS - Personnel performing meteorological observations ; Instruments and Methods of Observation Programme (IMOP) ; Commission for Instruments and Methods of Observation (CIMO) ; Technical Publications ; CIMO Guide ; guide cimo wmo-8 Add tagThis publication is designed to provide Members of the World Meteorological Organization (WMO) with guidance and assistance in developing national activities linked to climate information and services.Published by: WMO ; 2018 (2018 Edition)
This publication is designed to provide Members of the World Meteorological Organization (WMO) with guidance and assistance in developing national activities linked to climate information and services.
Notes: Other versions in preparation.
Collection(s) and Series: WMO- No. 100
Language(s): English; Other Languages: Arabic, Chinese, French, Russian, Spanish
Format: Digital (Free)
ISBN (or other code): 978-92-63-10100-6
Archives access: 1960-[...]
Tags: Climate ; Climate services ; Guide ; Methodology ; Competencies for Provision of Climate Services ; Commission for Climatology (CCl) ; World Climate Programme (WCP) ; Technical Publications Add tagLa première édition du Guide des instruments et des methodes d’observation meteorologiques (OMM-N° 8) a été publiée en 1954.Published by: OMM ; 2018 (Edition 2018)
La première édition du Guide des instruments et des methodes d’observation meteorologiques (OMM-N° 8) a été publiée en 1954.
Notes: Autres chapitres en préparation
Collection(s) and Series: OMM- No. 8
Language(s): French; Other Languages: English, Russian, Spanish, Arabic
Format: Digital (Free)
ISBN (or other code): 978-92-63-20008-2
Archives access: 1996-[...]Fog though a rare event has adverse economic implications to both the airline and aviation service providers if it’s occurrence, duration and dissipation periods are not properly predicted. This work assesses the accuracy and skill in forecasting fog events and suggesting possible adjustments to improve forecast accuracy and skill. The forecast used in this study are produced by MeteoGroup using Model Output Statistics (MOS). Forecasts for Heathrow, Northolt and Kenley are considered for analysis. These forecasts are used by British Airports Authority (BAA) in planning airport operations. The ...Published by: University of Reading - Department of meteorology ; 2016
Fog though a rare event has adverse economic implications to both the airline and aviation service providers if it’s occurrence, duration and dissipation periods are not properly predicted. This work assesses the accuracy and skill in forecasting fog events and suggesting possible adjustments to improve forecast accuracy and skill. The forecast used in this study are produced by MeteoGroup using Model Output Statistics (MOS). Forecasts for Heathrow, Northolt and Kenley are considered for analysis. These forecasts are used by British Airports Authority (BAA) in planning airport operations. The forecasts are produced daily at 08:00 UTC with a validity of 24 hours. Hourly Meteorological Aerodrome Reports (METARs) are used to verify the forecast. The forecast accuracy and skill is determined using Hit Rate (HR), False Alarm Ratio (FAR), Frequency Bias (FBI), and Critical Success Index (CSI) evaluated from a 2-category contingency table. Significance of the forecast error is evaluated using a student’s t-test for difference in means at 0.05 significance level. The HR and CSI for the original forecast for all the three stations, Heathrow, Northolt and Kenley was below 20%. Upon adjusting the forecast using regression analysis, the HR and CSI for Heathrow improved to 53.7% and 40.8% respectively. The HR and CSI for Northolt improved to 27.4% and 24.2% respectively. The improvement for Kenley was insignificant since the HR and CSI slightly improved to values below 10%. Although this method is purely statistical hence do not involve physical dynamics that dictate fog formation, maintenance and dissipation, in absence of a dynamical methods that can be applied to improve the accuracy and skill of visibility forecast within fog range then regression methods used in this study is a better option especially for Heathrow airport.
Notes: If you wish to download the full text, please contact the author (kizitoamua(at)gmail.com) or library(at)wmo.int (Please replace (at) by @).
Format: DigitalThis study attempted to investigate the variability of extreme rainfall and temperature over Rwanda and the associated circulation anomalies forecasting on wet and dry rainfall events between 1961 and 2010. The datasets used to achieve the objectives includes Temperature, the rainfall dataset, wind vector, pressure vertical velocity (omega) and the Indian Ocean sea surface temperature (SST). The methods used include correlation analysis, Standardized anomaly, composite analysis, and Empirical Orthogonal Functions (EOF) analysis. The results show that the mean annual cycle depict two rainy Seas ...Published by: Nanjing University of Information Science & Technology ; 2016
This study attempted to investigate the variability of extreme rainfall and temperature over Rwanda and the associated circulation anomalies forecasting on wet and dry rainfall events between 1961 and 2010. The datasets used to achieve the objectives includes Temperature, the rainfall dataset, wind vector, pressure vertical velocity (omega) and the Indian Ocean sea surface temperature (SST). The methods used include correlation analysis, Standardized anomaly, composite analysis, and Empirical Orthogonal Functions (EOF) analysis. The results show that the mean annual cycle depict two rainy Season in the courses of the year. The first rainy season runs from March – May (MAM) with the highest precipitation in April and second rainy season from September to November (SON), which has recorded the highest precipitation in November. The spatial distribution of monthly precipitation from January to December similarly show that the rainy season runs from March- May (MAM) received the highest precipitation in the region compared to September-November (SON). Results further show that the years with standardized deviation of +1 or more (wet years) including ,MAM and SON respectively, 1961,1963,1970,1981,1994,1998,2001,2004,2006 and 2009 whereas floods years. And for standardized deviation of -1 or less (dry years) includes 1979, 1984, 1993,2000,2001,2007 and 2010 considered as droughts years. The circulation anomalies associated with wet and dry years studied over these identified years revealed that in Rwanda, the equatorial wind climatology is deeply modified by the relief at a varied altitude.
Forecasters would make Rwanda climate more predictable. Strategies that integrate land and water management, and disaster risk reduction, within a framework of emerging climate change risks would bolster resilient development in the face of impacts of the new set of climate in Rwanda.
Notes: If you wish to download the full text, please contact the author (ujacquie(at)yahoo.fr) or library(at)wmo.int (Please replace (at) by @).
Format: DigitalGlobal climate change is remarkably changing the climatic patterns of the Pearl River basin and are significantly impacting the hydrological processes. Projection of future climate change impacts on steamflow variation is potential to provide scientific guidelines for sustainable water resources management and effective prevention and control for flood and drought disasters. In this study, a hydrological modeling system for assessing climate change impacts on runoffin the Pearl River basin was established and were used to simulate historical hydrological process and to project future streamflo ...PermalinkThis research investigates the dynamical and thermodynamical process of mesoscale convective system that intensifies squall lines wind speed propagation. The generation of African Easterly Waves (AEWs) and its lifecycle. The characteristics of squall lines (SLs) over West Africa (WA) which occurred In Guinea for two cases periods June 01-02 and June 13-14, 2015. In all six (6) AEWs have been tracked using reanalysis data from European Centre for Medium-Range Weather Forecasts (ECMWF). European Meteorological Satellite images (EUMETSAT) and Earth Networks WeatherBug StreamerRT were also used to ...PermalinkAerosols are small, micrometer-sized particles, whose optical effects coupled with their impact on cloud properties is a source of large uncertainty in climate models. Aerosols when inhaled are believed to have significant and detrimental effects on human health. Their presence also affects photosynthesis and agricultural production. Aerosol measurements are urgently required for the complete understanding and modeling their role in the climate system. This study builds on the analysis of Aerosol Optical depth (AOD) using Light Detection and Ranging (LIDAR) and sun photometer measurements then ...PermalinkThis paper examines the aerosol extinction coefficient profiles measured by Rayleigh-Raman-Mie-Lidar (RRML) system in Nanjing, China. I introduced two lidars methods (Raman and Fernald) and detection principle, and two lidars data Using Raman analysis method and Fernald analysis method to obtained aerosol extinction coefficient. Aerosol profiles at 607 nm and 532 nm over ranges from 6 km to 10 km were obtained using respectively Raman lidar and Rayleigh lidar in Nanjing.PermalinkPrecipitations vary consistently in Benin from 1981 to 2010. The present study reveals that the variation of Benin JJAS precipitation is positively correlated to MAM Sea Surface Temperature (SST) in Atlantic Ocean with correlation coefficient more than 0.7. When the SST is higher (lower) in the Atlantic Ocean, precipitation over Benin tends to be above (below) normal. The years 1988, 1989, 2003, 2007 and 2008, were wet with 1988, 2003, 2008 high SST over Tropical Southern Atlantic Ocean (STAO) while the years 1982, 1983, 1992 and 1997 formed the dry years with low SST over Tropical Southern At ...PermalinkThe southern coastal region of West Africa (SCWA) is located between 40N-80N latitudes and 100W -50E longitudes near the equator in the northern Hemisphere, the south and west are respectively equatorial and West Atlantic Ocean, and it is consisted to seven countries (Sierra Leon, Liberia, Cote d’Ivoire, Ghana, Togo, Benin and Nigeria). The rainy season starts from spring to the summer, mainly from May to October. The rainfall is very important for southern coastal of West Africa region which their economy and food supply are highly dependent on agricultural production. Understanding of previo ...PermalinkThe variability and predictability of summer rainfall over Zimbabwe at inter-annual time scale is studied. Dry and wet seasons are identified using Zimbabwe Standardized Rainfall Index (ZRI). Seasonal rainfall and circulation patterns are investigated at inter annual time scale. The study focuses on the temporal and spatial variation of summer rainfall over Zimbabwe and tries to explain the circulation mechanisms associated with such phenomenon.PermalinkFor Zimbabwe, where rain fed agriculture is the backbone of the economy, the importance of accurate rainfall seasonal forecasts cannot be overemphasized (Makarau and Jury, 1997). In fact, extremes in interseasonal variability of rainfall can significantly complicate human livelihoods. In addition, there have been predictions of increased precipitation variability and hydro-meteorological hazards such as floods, droughts, and erratic rainfall due to global warming (Field et al., 2014; Mushore, 2013a). Thus, detailed understanding of the major contributors to the rainfall variability over Zimbab ...PermalinkIn urban climate research, spatial and temporal variability of precipitation is always a critical element for numerical modelling. However, the effects of temporal resolution of precipitation forcing data has received little attention. Moreover, there has always been a difference practically and theoretically in the availability of precipitation data. This study was carried out to assess the impact of temporal resolution of precipitation forcing data on the modelled surface energy and water balance using available data from a site at the Strand campus of Kings College London. Analysis has been ...PermalinkPermalinkDespite substantial advances in both forecasting capability and emergency preparedness, recent years have seen a large number of natural disasters that have cost many lives, displaced large numbers of people, and caused widespread damage to property and infrastructure. Many of these disasters result from severe weather interacting with society. At the same time, less severe weather events place a continuing strain on society through more frequent impacts of smaller magnitude. This is especially evident in less developed countries with more fragile economies and infrastructure. In addition, wea ...PermalinkLa primera edición de la Guía de Instrumentos y Métodos de Observación Meteorológicos (OMM-Nº 8) se publicó en 1954 […].
La presente Guía es un recurso fundamental que describe la mayoría de los instrumentos, los sistemas y las técnicas utilizados regularmente, desde los más sencillos hasta los más complejos y sofisticados, pero no pretende abordar los métodos e instrumentos que se utilizan únicamente con fines de investigación. Tiene por objeto presentar las mejores prácticas, los procedimientos y las capacidades básicas de los instrumentos y sistemas a fin de ayudar a los Servicios Me ...PermalinkПервое издание Руководства по метеорологическим приборам и методам наблюдений (ВМО-№ 8) было опубликовано в 1954 г.[…].
Данное Руководство представляет собой ключевой ресурс, в котором содержится описание большинства приборов, систем и методов, используемых на регулярной основе: от простейших до характеризующихся высоким и высочайшим уровнем сложности, при этом не делается попытки описать методы и приборы, которые используются лишь для проведения научных исследований. Задача Руководства состоит в том, чтобы предоставить информацию о передовых методах, процедурах и базовых возможностях п ...Permalink《WMO 气象仪器和观测方法指南》（WMO-No.8）第一版于1954 年出版，共十二章。此后，标准化仍然是仪器和观测方法委员会（CIMO）活动的一个关键问题。委员会不断审议指南的 内容，并确保在定期更新时纳入了反映技术的快速发展及其在气象仪器和观测方法领域的 实施的现代指导材料。
对于常规用途的大多数仪器、系统和技术，本指南是一项关键资源，提供了从最简单到最复 杂精细的描述，但不会涉及仅用于研究的方法和工具。指南的目的是给出最佳做法和程序，以及仪器和系统的基本能力，协助国家气象和水文部门或者其他感兴趣的运行观测系统的用 户编制他们的手册和程序，满足各自对测量和观察结果的特定需要。指南有意将标准化限制 在基本要求上，并将建议局限至给定仪器或测量系统不同配置最常见的一般特征，从而给 进一步发展留下广泛余地。对于有关与WIGOS 相关的仪器和观测方法的所有问题，本指南 都是权威参考。Permalinkوصدرت الطبعة الأولى من دلیل أدوات وطرق رصد الأحوال الجویة (مطبوع المنظمة رقم 8) في عام 1954 وكانت تتألف من اثني عشر فصلاً. ومنذ ذلك الحین، ظلت مسألة التوحید القیاسي مصدر قلق ومن ھنا تواصل اللجنة استعراض محتویات .(CIMO) رئیسیاً بالنسبة لأنشطة لجنة أدوات وطرق الرصد الدلیل وتتأكد من أن عملیات التحدیث المنتظمة تشمل المواد الإرشادیة الحدیثة التي تعكس التطور السریع للتكنولوجیا وتنفیذھا في مجال أدوات وطرق رصد الأحوال الجویةPermalinkis an issue of NewScientist. Reed Business Information Ltd, 2013PermalinkThis WMO information note is the first in a series that will aim to make the science underlying the weather, climate and water issues addressed by the World Meteorological Organization (WMO) more easily accessible to the general public. The science of climate change continues to advance through the accumulation of additional data and observations and new studies and analyses. The peer-reviewed scientific literature that draws on these data and studies are assessed by the WMO/UNEP Intergovernmental Panel on Climate Change (IPCC), which will issue "The Physical Science Basis" volume of its Fifth ...Permalink2013A regional-scale sensitivity study has been carried out to investigate the climatic effects of forest cover change in Europe. Applying REMO (regional climate model of the Max Planck Institute for Meteorology), the projected temperature and precipitation tendencies have been analysed for summer, based on the results of the A2 IPCC-SRES emission scenario simulation. For the end of the 21st century it has been studied, whether the assumed forest cover increase could reduce the effects of the greenhouse gas concentration change.Permalinkis an issue of 気象庁硏究時報. 気象庁, 2012PermalinkScience for Environment Policy, Issue 297. EEA, 2012A new study has concluded that the benefits of carbon capture and storage (CCS) to human health and ecosystems from reduced climate change related impacts considerably outweigh any negative impacts from using the technology in power plants. However, CCS has a large impact on the depletion of natural resources.PermalinkScience for Environment Policy, Issue 278. EEA, 2012The Earth is now absorbing more energy from the Sun than it is radiating into space. A recent analysis indicates that most models of this energy imbalance underestimate the impacts of human-made aerosols and overestimate time lags in response to the climate. As such, the energy imbalance and future impacts on climate may be greater than predicted.PermalinkNtamack S. - 2012This paper addresses some methodological biases present in the mode of understanding climate change through scientific research. These overlapping biases are referred to as glocality. The paper argues that as a device of the cognitive globalisation around environmental issues, glocality operates in science as a cognitive form of ubiquity deriving from an attempt to compress the spatiotemporal dimension of the changing weather within the time and space of the mind. In the case of climate change, it refers to three focal points summarised as problems of climate change’s phenomena problem of the ...PermalinkFollowing the advice of the XV Session of the Association, the TT-SPAP developed the regional Operating Plan by compiling the tasks in the Work Programmes of the Working Groups. Thus, the Operating Plan contains concrete tasks and deliverables aimed at assisting RA VI Members to implement their national plans for further development of their NMHSs and improvement of the provision of meteorological, hydrological and climatological services for supporting their national economies and the society. The RA VI Operating Plan is intended to be a living document regularly monitored and adjusted as nec ...PermalinkWhile agreeing on the choice of an optimal investment decision is already difficult for any diverse group of actors, priorities, and world views, the presence of deep uncertainties further challenges the decision-making framework by questioning the robustness of all purportedly optimal solutions. This paper summarizes the additional uncertainty that is created by climate change, and reviews the tools that are available to project climate change (including downscaling techniques) and to assess and quantify the corresponding uncertainty. Assuming that climate change and other deep uncertainties ...PermalinkKunkel Kenneth E.; American Meteorological Society (AMS); National Climatic Data Center (NCDC) - AMS, 2012The state of knowledge regarding trends and an understanding of their causes is presented for a specific subset of extreme weather and climate types. For severe convective storms (tornadoes, hail storms, and severe thunderstorms), differences in time and space of practices of collecting reports of events make the use of the reporting database to detect trends extremely difficult. Overall, changes in the frequency of environments favorable for severe thunderstorms have not been statistically significant. For extreme precipitation, there is strong evidence for a nationally-averaged upward trend ...PermalinkEmissions of greenhouse gases (GHGs) from agriculture are substantial. This paper looks into how can agricultural greenhouse gas emissions be reduced or sequestration enhanced while maintaining and even increasing food supply. The paper relies on a research undertaken in nine chosen African countries.
The authors reveal that croplands and grazing lands cover more than half of the East African countries’ lands and about 40% of the West African countries’ lands. In the nine African countries, the largest amount of GHG emissions is from the livestock sector, followed by emissions f ...Permalink
PermalinkEuropean Commission, 2012Previous studies have showed that microsensors can successfully measure ozone in ambient air for a limited period of time after on-site calibration by comparison to ultraviolet photometry. This method is generally more successful than the calibration in exposure chambers under controlled conditions because of the difference between laboratory and fields air matrixes. To expand this result, we carried out an experiment at two sampling sites. At the first site, themicrosensors were calibrated during a few days. Subsequently, the calibrated microsensors were taken to another sampling site where t ...PermalinkPermalinkScience for Environment Policy, Issue 263. EEA, 2011Satellite data from the Torres Islands in the southwest Pacific suggest that rising sea-levels in the region widely attributed to climate change is also partly caused by sinking of the islands following earthquakes in the 1990s, according to recent research.Permalink
PermalinkScience for Environment Policy, Issue 253. EEA, 2011The quality of indoor air varies widely across Europe, according to a recent study. Poor indoor air quality is mainly due to household products, outdoor pollution and smoking yielding high levels of organic pollutants harmful to human health. The study indicates higher levels of indoor air pollution in southern Europe than in northern Europe, and with an associated risk of cancer higher than the acceptable unit risk. However the present data must be improved in order to get more precise risk estimates.PermalinkProceedings A, vol. 463 no. 2078. Svensmark Henrik; Pedersen Jens Olaf P.; Marsh Nigel D.; et al. - The Royal Society, 2011Experimental studies of aerosol nucleation in air, containing trace amounts of ozone, sulphur dioxide and water vapour at concentrations relevant for the Earth's atmosphere, are reported. The production of new aerosol particles is found to be proportional to the negative ion density and yields nucleation rates of the order of 0.1–1 cm−3 s−1. This suggests that the ions are active in generating an atmospheric reservoir of small thermodynamically stable clusters, which are important for nucleation processes in the atmosphere and ultimately for cloud formation.PermalinkUCAR Magazine. The University Corporation for Atmospheric Research, 2011NCAR and the University of Paris recently teamed up to produce the most intricate model of organic atmospheric chemistry to date. With this formidable tool in hand, they’ve now produced the first explicit simulation of a vital process: the chemistry by which primary organic aerosols (POA, which are directly emitted) work with other atmospheric components to produce secondary organic aerosols (SOA).Permalinkis an issue of Nature. Nature Publishing Group, 2011Notably contains:
- Storm warning: US policy on climate research should not be derailed by political infighting: 1p.
- 2°C or not 2°C? That is the climate question: 1p.
- Tracking the route of the 2004 tsunami: 1p.
- Carbon dioxide footprints quantified: 1p.
- China unveils 2020 vision for orbiting space station: 1p.
- A grey whale in the wrong ocean could be a harbinger of climate change: 1p.
- The Storet effect and isotopic fractionation in high-temperature silicate melts: 1p.PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Korhonen H.; Sihto S.-L.; Kerminen V.-M.; et al. - Copernicus GmbH, 2011Several mathematical tools have been developed in recent years to analyze new particle formation rates and to estimate nucleation rates and mechanisms at sub-3 nm sizes from atmospheric aerosol data. Here we evaluate these analysis tools using 1239 numerical nucleation events for which the nucleation mechanism and formation rates were known exactly. The accuracy of the estimates of particle formation rate at 3 nm (J3) showed significant sensitivity to the details of the analysis, i.e. form of equations used and assumptions made about the initial size of nucleating clusters, with the fraction o ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Donahue N. M.; Epstein S. A.; Pandis S. N.; et al. - Copernicus GmbH, 2011We develop the thermodynamic underpinnings of a two-dimensional volatility basis set (2D-VBS) employing saturation mass concentration (Co) and the oxygen content (O:C) to describe volatility, mixing thermodynamics, and chemical evolution of organic aerosol. The work addresses a simple question: "Can we reasonably constrain organic-aerosol composition in the atmosphere based on only two measurable organic properties, volatility and the extent of oxygenation?" This is an extension of our earlier one-dimensional approach employing volatility only (C* = γ Co, where γ is an activity coefficient). U ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Held A.; Brooks I. M.; Leck C.; et al. - Copernicus GmbH, 2011We present direct eddy covariance measurements of aerosol number fluxes, dominated by sub-50 nm particles, at the edge of an ice floe drifting in the central Arctic Ocean. The measurements were made during the ice-breaker borne ASCOS (Arctic Summer Cloud Ocean Study) expedition in August 2008 between 2°–10° W longitude and 87°–87.5° N latitude. The median aerosol transfer velocities over different surface types (open water leads, ice ridges, snow and ice surfaces) ranged from 0.27 to 0.68 mm s−1 during deposition-dominated episodes. Emission periods were observed more frequently over the open ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Huang M.; Carmichael Gregory R.; Spak S. N.; et al. - Copernicus GmbH, 2011Chronic high surface ozone (O3) levels and the increasing sulfur oxides (SOx = SO2+SO4) ambient concentrations over South Coast (SC) and other areas of California (CA) are affected by both local emissions and long-range transport. In this paper, multi-scale tracer, full-chemistry and adjoint simulations using the STEM atmospheric chemistry model are conducted to assess the contribution of local emission sourcesto SC O3 and to evaluate the impacts of transported sulfur and local emissions on the SC sulfur budgetduring the ARCTAS-CARB experiment period in 2008. Sensitivity simulations quantify c ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Jaeglé L.; Quinn P. K.; Bates T. S.; et al. - Copernicus GmbH, 2011We combine in situ measurements of sea salt aerosols (SS) from open ocean cruises and ground-based stations together with aerosol optical depth (AOD) observations from MODIS and AERONET, and the GEOS-Chem global chemical transport model to provide new constraints on SS emissions over the world's oceans. We find that the GEOS-Chem model using the Gong (2003) source function overestimates cruise observations of coarse mode SS mass concentrations by factors of 2–3 at high wind speeds over the cold waters of the Southern, North Pacific and North Atlantic Oceans. Furthermore, the model systematical ...PermalinkApparent evidence for a strong signature of solar activity in ground-based insolation data was recently reported. In particular, a strong increase of the irradiance of the direct solar beam with sunspot number as well as a decline of the brightness of the solar aureole and the measured precipitable water content of the atmosphere with solar activity were presented. The latter effect was interpreted as evidence for cosmic-ray-induced aerosol formation. Here I show that these spurious results are due to a failure to correct for seasonal variations and the effects of volcanic eruptions and local ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Markovic M. Z.; Hayden K. L.; Murphy J. G.; et al. - Copernicus GmbH, 2011The Border Air Quality and Meteorology Study (BAQS-Met) was an intensive, collaborative field campaign during the summer of 2007 that investigated the effects of transboundary pollution, local pollution, and local meteorology on air quality in southwestern Ontario. This analysis focuses on the measurements of the inorganic constituents of particulate matter with diameter of less than 1 μm (PM1), with a specific emphasis on nitrate. We evaluate the ability of AURAMS, Environment Canada's chemical transport model, to represent regional air pollution in SW Ontario by comparing modelled aerosol in ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Tapia A.; Villanueva F.; Salgado M. S.; et al. - Copernicus GmbH, 2011A study of the kinetics and products obtained from the reactions of 3-methylfuran with the main atmospheric oxidants has been performed. The rate coefficients for the gas-phase reaction of 3-methylfuran with OH and NO3 radicals have been determined at room temperature and atmospheric pressure (air and N2 as bath gases), using a relative method with different experimental techniques. The rate coefficients obtained for these reactions were (in units cm3 molecule−1 s−1) kOH = (1.13 ± 0.22) × 10−10 and kNO3 = (1.26 ± 0.18) × 10−11. Products from the reaction of 3-methylfuran with OH, NO3 and Cl at ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Wojtal P.; Halla J. D.; McLaren R. - Copernicus GmbH, 2011A complete understanding of the formation mechanism of nitrous acid (HONO) in the ambient atmosphere is complicated by a lack of understanding of processes occurring when aqueous water is present. We report nocturnal measurements of HONO, SO2 and NO2 by differential optical absorption spectroscopy over the ocean surface in a polluted marine environment. In this aqueous environment, we observed reproducible pseudo steady states (PSS) of HONO every night, that are fully formed shortly after sunset, much faster than seen in urban environments. During the PSS period, HONO is constant with time, in ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Xu J.; Li C.; Shi H.; et al. - Copernicus GmbH, 2011This study investigated the decadal variation of the direct surface solar radiation (DiSR) and the diffuse surface solar radiation (DfSR) during 1961–2008 in the Shanghai megacity as well as their relationships to Aerosol Optical Depth (AOD) under clear-sky conditions. Three successive periods with unique features of long term variation of DiSR were identified for both clear-sky and all-sky conditions: a "dimming" period from the late 1960s to the mid 1980s, a "stabilization"/"slight brightening" period from the mid 1980s to the mid 1990s, and a "renewed dimming" period thereafter. During the ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Stroud C. A.; Makar P. A.; Moran M. D.; et al. - Copernicus GmbH, 2011Regional-scale chemical transport model predictions of urban organic aerosol to date tend to be biased low relative to observations, a limitation with important implications for applying such models to human exposure health studies. We used a nested version of Environment Canada's AURAMS model (42- to- 15- to- 2.5-km nested grid spacing) to predict organic aerosol concentrations for a temporal and spatial domain corresponding to the Border Air Quality and Meteorology Study (BAQS-Met), an air-quality field study that took place in the southern Great Lakes region in the summer of 2007. The use o ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Vakkari V.; Laakso H.; Kulmala M.; et al. - Copernicus GmbH, 2011This study is based on 18 months (20 July 2006–5 February 2008) of continuous measurements of aerosol particle size distributions, air ion size distributions, trace gas concentrations and basic meteorology in a semi-clean savannah environment in Republic of South Africa. New particle formation and growth was observed on 69% of the days and bursts of non-growing ions/sub-10 nm particles on additional 14% of the days. This new particle formation frequency is the highest reported from boundary layer so far. Also the new particle formation and growth rates were among the highest reported in the li ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Brock C. A.; Cozic J.; Bahreini R.; et al. - Copernicus GmbH, 2011We present an overview of the background, scientific goals, and execution of the Aerosol, Radiation, and Cloud Processes affecting Arctic Climate (ARCPAC) project of April 2008. We then summarize airborne measurements, made in the troposphere of the Alaskan Arctic, of aerosol particle size distributions, composition, and optical properties and discuss the sources and transport of the aerosols. The aerosol data were grouped into four categories based on gas-phase composition. First, the background troposphere contained a relatively diffuse, sulfate-rich aerosol extending from the top of the sea ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Aschmann J.; Sinnhuber B.-M.; Chipperfield M. P.; et al. - Copernicus GmbH, 2011Stratospheric bromine loading due to very short-lived substances is investigated with a three-dimensional chemical transport model over a period of 21 years using meteorological input data from the European Centre for Medium-Range Weather Forecasts ERA-Interim reanalysis from 1989 to the end of 2009. Within this framework we analyze the impact of dehydration and deep convection on the amount of stratospheric bromine using an idealized and a detailed full chemistry approach. We model the two most important brominated short-lived substances, bromoform (CHBr3) and dibromomethane (CH2Br2), assumin ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Dearden C.; Connolly P. J.; Choularton T. W.; et al. - Copernicus GmbH, 2011The effect of microphysical and environmental factors on the development of precipitation in warm idealised cloud is explored using a kinematic modelling framework. A simple one-dimensional column model is used to drive a suite of microphysics schemes including a flexible multi-moment bulk scheme (including both single and dual moment cloud liquid water) and a state-of-the-art bin-resolved scheme with explicit treatments of liquid and aerosol. The Factorial Method is employed to quantify and compare the sensitivities of each scheme under a set of controlled conditions, in order to isolate the ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. de la Torre Juárez M.; Davis A. B.; Fetzer E. J. - Copernicus GmbH, 2011Means, standard deviations, homogeneity parameters used in models based on their ratio, and the probability distribution functions (PDFs) of cloud properties from the MODerate resolution Infrared Spectrometer (MODIS) are estimated globally as function of averaging scale varying from 5 to 500 km. The properties – cloud fraction, droplet effective radius, and liquid water path – all matter for cloud-climate uncertainty quantification and reduction efforts. Global means and standard deviations are confirmed to change with scale. For the range of scales considered, global means vary only within 3% ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Feng L.; Palmer P. I.; Yang Y.; et al. - Copernicus GmbH, 2011We evaluate the GEOS-Chem atmospheric transport model (v8-02-01) of CO2 over 2003–2006, driven by GEOS-4 and GEOS-5 meteorology from the NASA Goddard Global Modeling and Assimilation Office, using surface, aircraft and space-borne concentration measurements of CO2. We use an established ensemble Kalman Filter to estimate a posteriori biospheric+biomass burning (BS + BB) and oceanic (OC) CO2 fluxes from 22 geographical regions, following the TransCom-3 protocol, using boundary layer CO2 data from a subset of GLOBALVIEW surface sites. Global annual net BS + BB + OC CO2 fluxes over 2004–2006 for ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Flagg D. D.; Taylor P. A. - Copernicus GmbH, 2011Mesoscale modeling of the urban boundary layer requires careful parameterization of the surface due to its heterogeneous morphology. Model estimated meteorological quantities, including the surface energy budget and canopy layer variables, will respond accordingly to the scale of representation. This study examines the sensitivity of the surface energy balance, canopy layer and boundary layer meteorology to the scale of urban surface representation in a real urban area (Detroit-Windsor (USA-Canada)) during several dry, cloud-free summer periods. The model used is the Weather Research and Forec ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Wu D. L.; Chae J. H.; Lambert A.; et al. - Copernicus GmbH, 2011A research algorithm is developed for noise evaluation and feature detection of the CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) Level 1 (L1) backscatter data with an emphasis on cloud/aerosol features in the upper troposphere and lower stratosphere (UT/LS). CALIOP measurement noise of the version v2.01 and v2.02 L1 backscatter data aggregated to (5 km) horizontal resolution is analyzed with two approaches in this study. One is to compare the observed and modeled molecular scatter profiles by scaling the modeled profile (with a fitted scaling factor α) to the observed clear-sky ba ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Rose D.; Gunthe S. S.; Su H.; et al. - Copernicus GmbH, 2011Size-resolved chemical composition, mixing state, and cloud condensation nucleus (CCN) activity of aerosol particles in polluted mega-city air and biomass burning smoke were measured during the PRIDE-PRD2006 campaign near Guangzhou, China, using an aerosol mass spectrometer (AMS), a volatility tandem differential mobility analyzer (VTDMA), and a continuous-flow CCN counter (DMT-CCNC).PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Russo M. R.; Marécal V.; Hoyle C. R.; et al. - Copernicus GmbH, 2011Fast convective transport in the tropics can efficiently redistribute water vapour and pollutants up to the upper troposphere. In this study we compare tropical convection characteristics for the year 2005 in a range of atmospheric models, including numerical weather prediction (NWP) models, chemistry transport models (CTMs), and chemistry-climate models (CCMs). The model runs have been performed within the framework of the SCOUT-O3 (Stratospheric-Climate Links with Emphasis on the Upper Troposphere and Lower Stratosphere) project. The characteristics of tropical convection, such as seasonal c ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Schneising O.; Buchwitz M.; Reuter M.; et al. - Copernicus GmbH, 2011Carbon dioxide (CO2) and methane (CH4) are the two most important anthropogenic greenhouse gases contributing to global climate change. SCIAMACHY onboard ENVISAT (launch 2002) was the first and is now with TANSO onboard GOSAT (launch 2009) one of only two satellite instruments currently in space whose measurements are sensitive to CO2 and CH4 concentration changes in the lowest atmospheric layers where the variability due to sources and sinks is largest.PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Slowik J. G.; Brook J.; Chang R. Y.-W.; et al. - Copernicus GmbH, 2011As part of the BAQS-Met 2007 field campaign, Aerodyne time-of-flight aerosol mass spectrometers (ToF-AMS) were deployed at two sites in southwestern Ontario from 17 June to 11 July 2007. One instrument was located at Harrow, ON, a rural, agriculture-dominated area approximately 40 km southeast of the Detroit/Windsor/Windsor urban area and 5 km north of Lake Erie. The second instrument was located at Bear Creek, ON, a rural site approximately 70 km northeast of the Harrow site and 50 km east of Detroit/Windsor. Positive matrix factorization analysis of the combined organic mass spectral dataset ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Kurtén T.; Petäjä T.; Smith J.; et al. - Copernicus GmbH, 2011The state-of-the art method for measuring atmospheric gas-phase sulfuric acid is chemical ionization mass spectrometry (CIMS) based on nitrate reagent ions. We have assessed the possible effect of the sulfuric acid molecules clustering with base molecules on CIMS measurements using computational chemistry. From the computational data, three conclusions can be drawn. First, a significant fraction of the gas-phase sulfuric acid molecules are very likely clustered with amines if the amine concentration is around or above a few ppt. Second, some fraction of these acid-amine clusters may not be cha ...PermalinkAtmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Li J.; Hu Y.; Huang J.; et al. - Copernicus GmbH, 2011A method is developed based on Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) level 1 attenuated backscatter profile data for deriving the mean extinction coefficient of water droplets close to cloud top. The method is applicable to low level (cloud topPermalinkECMWF Newsletter, Number 126. ECMWF, 2011This article describes the ability of the monthly extension of ECMWF’s Ensemble Prediction System (EPS) to predict the MJO and its teleconnections in the sub-seasonal time range from a series of model hindcasts covering a 20-year period (1989–2008).Permalinkis an issue of Journal of the Meteorological Society of Japan. Meteorological Society of Japan, 2011Permalinkis an issue of Rivista di Meteorologia. Organo del Servizio Meteorologico dell'Aeronautica, 2011Contiene tali:
- Il caldo anomalo del 2003 in Italia: anomalie climatiche ed
inquinamento da ozono
- HSAF - Hydrology Satellite Application Facilities: un progetto
europeo con finalità di servizio e impiego operativo
- Nuovo approccio alle previsioni stagionali: analisi
- Simulazione del Meteosat Third Generation Lightning Imager
attraverso dati reali rilevati dal satellite NASA TRMM - LIS
- Intensità delle precipitazioni: campagna internazionale di
misura a Vigna di Valle organizzata dal Ser ...Permalinkis an issue of Papers in meteorology and geophysics. J-Stage, 2011- Establishment of Precision of Calculation for Volcanic Crustal Deformation by FEM
Reproduction of Mogi-Yamakawa's Model Using FEM -
- Surface Displacement by Spherical Pressure Sources of relatively Large Radius compared with Those Depth
Calculation by Finite Element Method -
- Magnitude Determination of Deep-focus Earthquakes in and around Japan with Regional Velocity-amplitude Data (II)
- Long-term changes of temperature extremes and day-to-day variability in Japan
- Evaluation of Seasonal Cycles of Hydrological Proc ...Permalinkis an issue of iLEAPS Newsletter. iLEAPS, 2011The latest iLEAPS Newsletter No. 10 deals with "Terrestrial feedbacks and Earth system models".PermalinkThe aims of the meeting are to: 1) understand the role of atmospheric chemistry and composition in global atmospheric change as expressed in the Australasian region and internationally; and 2) to provide a forum for atmospheric composition researchers from different disciplines (in-situ observations, remote sensing observations, modelling) to share ideas, enhance collaboration and develop a coordinated regional approach to characterising atmospheric processes in Australasia.PermalinkGiven the likely pace of change in the electric vehicle market, it is important that the environmental externalities are identified and quantified. In this report we present the results of a modelling study which investigated how ozone pollution in the Greater Metropolitan Region of Sydney NSW, Australia would respond to the replacement of Sydney’s internal combustion engine (ICE) passenger vehicle fleet with a fleet of electric vehicles. A brief description of the modelling methodology is provided in the next section, and a summary of the modelling outcomes is provided in the following sectio ...PermalinkPermalinkThe WMO Strategic Plan is the result of an organization-wide strategic, operational and budgeting process to provide a blueprint for the 188 Member States and Territories to meet the changing needs of their communities for weather, climate, water and related environmental information.PermalinkThe International Polar Year (IPY) 2007–2008, co-sponsored by ICSU and WMO, became the largest coordinated research program in the Earth’s polar regions, following in the footsteps of its predecessor, the first and second International Polar Years in 1881-1883 and 1932-1933 and the International Geophysical Year 1957–1958.
An estimated 50,000 researchers, local observers, educators, students, and support personnel from more than 60 nations were involved in the 228 international IPY projects (170 in science, 1 in data management, and 57 in education and outreach) and related national eff ...PermalinkThis white paper is a synthesis of several recent workshops, reports and published literature: (Smith et al., 2011; Anderson et al. 2011; Weller et al. 2010; Meehl et al. 2009; Hurrell et al. 2009; Shukla et al. 2010 and Brunet et al. 2010). The intent is to document: (i) the scientific basis for prediction from weeks to decades; (ii) current capabilities; and (iii) outstanding challenges. We focus on time--‐scales from beyond the time scale of deterministic weather (i.e., sub--‐seasonal) to decadal.PermalinkUNEP, 2011UNEP/GRID-Arendal, with financial support from the Research Council of Norway (Forskningsrådet), prepared this set of posters for the International Polar Year. These posters present and illustrate a broad sample of polar issues and facts -- they are a textbook for your wall. Posters are available in English and in Norwegian (bokmål).
There are five posters, with high-school age students as the main target group. Each poster stands on its own but is recognizable as part of the series through the common design and elements. All the posters include illustrations and text highlighti ...PermalinkGiven the widely noted increase in the warming effects of rising greenhouse gas concentrations, it has been unclear why global surface temperatures did not rise between 1998 and 2008. We find that this hiatus in warming coincides with a period of little increase in the sum of anthropogenic and natural forcings. Declining solar insolation as part of a normal eleven-year cycle, and a cyclical change from an El Nino to a La Nina dominate our measure of anthropogenic effects because rapid growth in short-lived sulfur emissions partially offsets rising greenhouse gas concentrations. As such, we fin ...PermalinkНастоящая публикация предназначена для предоставления руководства и оказания содействия странам — членам Всемирной Метеорологической Организации (ВМО) в развитии национальной деятельности, связанной с климатической информацией и обслуживанием.Permalink本出版物旨在为世界气象组织(WMO)会 员开展与气候信息与服务相关的国家活动提供 指导和支持。本指南之前已有两个版本：最初 的版本出现在1960年，而第二个版本于1983年 出版。随着时间的推移，虽然很多最基本的气 候科学和气候学惯例仍然保持不变，但是气候 学知识和资料分析技术方面的科学进步，以及 技术、计算机能力以及仪器方面的变化，使得 第二个版本过时了。Permalinkالمنظمة العالمية للأرصاد - المنظمة العالمية للأرصاد, 2011 (طبعة 2011; مجموعة مطبوعات المنظمة-No. 100)صمم هذا المطبوع من أجل توفير التوجيه والمساعدة لأعضاء المنظمة العالمية للأرصاد الجوية في تطوير الأنشطة الوطنية المرتبطة بالمعلومات والخدمات المناخية. وقد صدرت طبعتان سابقتان من هذا الدليل: المطبوع الأصلي، الذي ظهر في 1960 ، والطبعة الثانية، التي نشرت في 1983 . ومع أن الكثير من مبادئ علم المناخ والممارسات المناخية لم تفقد صلاحيتها مع مرور الزمن، فإن أوجه التقدم العلمي في المعارف المناخية وأساليب تحليل البيانات، فضاً عن التغيرات التي حدثت في التكنولوجيا، وفي قدرات الحواسيب والأجهزة، قد جعلت الطبعة الثانية غير مناسبة للعصر.PermalinkPermalinkPermalinkPermalinkPermalinkPermalinkLa presente publicación tiene por objeto proporcionar orientación y asistencia a los Miembros de la Organización Meteorológica Mundial (OMM) para llevar a cabo actividades nacionales vinculadas con la información y los servicios climáticos.PermalinkPermalinkJournal of the Meteorological Society of Japan, Vol.88 No.6. Ohba Masamichi; Ueda Hiroaki - Meteorological Society of Japan, 2010Simulations of the Early Cretaceous (120,000,000 years before the present day: 120 Ma) and the Last Cretaceous (65 Ma) have been performed using an atmospheric general circulation model (AGCM) coupled with a 1.5-layer reduced-gravity ocean model. After the initial spin-up period, both the runs are integrated for approximately 70 years. The simulation results confirm the occurrence of first-order changes in tropical atmospheric circulation in response to changes in the land/sea distribution. The simulation results show that the continental drift during the Cretaceous strongly affects the Walker ...PermalinkBulletin of the American Meteorological Society, Vol. 91 No. 10. Shapiro Melvin; Shukla Jagadish; Brunet Gilbert - AMS, 2010PermalinkBulletin of the American Meteorological Society, Vol. 91 No. 10. Gilleland Eric; Ahijevych David A.; Brown Barbara G. - AMS, 2010PermalinkAntarctic Record, Vol. 54, No. 2. Ushio Shuki - Scholarly and Academic Information Navigator (CiNii), 2010The wintering party of the 49th Japanese Antarctic Research Expedition (JARE-49), consisting of 29 members, was conducted as the second year of the 7th four-year plan of JARE and the second half of the International Polar Year 2007-2008 (IPY2007-2008) at Syowa Station and its surrounding areas. JARE-49 took over management of the station facilities and functions from JARE-48 on February 1, 2008, and performed scientific observations and logistic duties. Though it was a little smaller in terms of number of wintering personnel than previous teams, it was well prepared to perform station manageme ...PermalinkThe performance of a 1-D soil model in a semiarid area of North China was investigated using observational data from a cropland station at the Tongyu reference site of the Coordinated Enhanced Observing Period (CEOP) during the non-growing period, when the ground surface was covered with bare soil. Comparisons between simulated and observed soil surface energy balance components as well as soil temperatures and water contents were conducted to validate the soil model. Results show that the soil model could produce good simulations of soil surface temperature, net radiation flux and sensible he ...PermalinkOn the basis of two ensemble experiments conducted by a general atmospheric circulation model (Institute of Atmospheric Physics nine-level atmospheric general circulation model coupled with land surface model, hereinafter referred to as IAP9L_CoLM), the impacts of realistic Eurasian snow conditions on summer climate predictability were investigated. The predictive skill of sea level pressures (SLP) and middle and upper tropospheric geopotential heights at mid-high latitudes of Eurasia was enhanced when improved Eurasian snow conditions were introduced into the model. Furthermore, the model ski ...PermalinkAtmospheric and Oceanic Science Letters, Volume 3 Number 6. Liu Hui-Zhi; Sang Jian-Guo - Science Press, 2010The present study solves a two-layer atmospheric wave equation model with a lower atmosphere concave wind profile and cold-air outbreak over sea, while simultaneously proving that such a wind shear may cause neutral boundary layer roll vortices in the presence of disturbing sources upstream. Without thermal effects, the wind shear-induced waves have band structures at the top of the boundary layer that are similar to cloud street patterns observed over sea. This study proves that dynamic and thermal effects can act independently to initiate the roll vortices in the lower atmosphere. At the sam ...PermalinkAtmospheric and Oceanic Science Letters, Volume 3 Number 6. Yu En-Tao; Wang Hui-Jun; Sun Jian-Qi - Science Press, 2010This paper describes a dynamical downscaling simulation over China using the nested model system, which consists of the modified Weather Research and Forecasting Model (WRF) nested with the NCAR Community Atmosphere Model (CAM). Results show that dynamical downscaling is of great value in improving the model simulation of regional climatic characteristics. WRF simulates regional detailed temperature features better than CAM. With the spatial correlation coefficient between the observation and the simulation increasing from 0.54 for CAM to 0.79 for WRF, the improvement in precipitation simulati ...Permalink
Permalinkis an issue of 気象研究所技術報告. Tsujino Hiroyuki; Motoi Tatsuo; Ishikawa Ichiro - Meteorological Research Institute, 2010This technical report is a manual of the Meteorological Research Institute Community Ocean Model (MRI.COM). MRI.COM is an ocean general circulation model developed and maintained at the Meteorological Research Institute (MRI) of the Japan Meteorological Agency (JMA). As the name suggests, it has been used for studying large scale oceanic phenomena and as the oceanic part of the coupled climate models developed at MRIPermalinkAutoclaved natural seawater collected in the North Pacific Ocean was used as a reference material for nutrients in seawater (RMNS) during an inter-laboratory comparison (I/C) study conducted in 2008. This study was a follow-up to previous studies conducted in 2003 and 2006. A set of six samples was distributed to each of 58 laboratories in 15 countries around the globe, and results were returned by 54 of those laboratories (15 countries). The homogeneities of samples used in the 2008 I/C study, based on analyses for three determinants, were improved compared to those of samples used in the 200 ...Permalinkis an issue of Journal of the Meteorological Society of Japan. Meteorological Society of Japan, 2010Contains:
- Mechanisms of Temporary Improvement and Rapid Changes in Visibility in Fogs
- Changes in Potential Intensity of Tropical Cyclones Approaching Japan due to Anthropogenic Warming in Sea Surface and Upper-Air Temperatures
- Convective Boundary Layer above a Subtropical Island Observed by C-band Radar and Interpretation using a Cloud Resolving Model
- Role of Large-Scale Circulation in Triggering Foehns in the Hokuriku District of Japan during Midsummer
- Diurnal Variations in Lower-Tropospheric Wind over Japan ...PermalinkJournal of the Meteorological Society of Japan, Vol.88 No.5. Kobayashi Eriko; Uchiyama Akihiro; Yamazaki Akihiro; et al. - Meteorological Society of Japan, 2010The Skyrad software package (SKYRAD.pack), which is used to analyze sky radiometer data, utilizes aerosol retrieval algorithms that are based on the Mie theory. In modeling the optical properties of dust-like aerosols, however, it is necessary to account for particle nonsphericity. We applied aerosol retrieval algorithms based on the spheroid model to SKYRAD.pack. We tested the model using simulated data from aerosol models and verified that dust-like aerosol optical properties can be accurately retrieved using the spheroid model. Moreover, we analyzed sky radiometer data collected in Tsukuba, ...PermalinkJournal of the Meteorological Society of Japan, Vol.88 No.5. Kitamura Yuji - Meteorological Society of Japan, 2010In the present study, we perform a set of numerical simulations in a moderately stable boundary layer with four types of subgrid-scale parameterization schemes and attempt to evaluate the error of the vertical flux for these schemes in terms of self-consistency on the basis of the Germano identity. If the effects of grid-scale components in higher wavenumbers are excluded from the analysis, the error estimated by the Germano identity is insensitive to the reference data utilized. The subgrid-scale flux, evaluated by the Smagorinsky model, tends to excessively weaken the positive temperature gr ...PermalinkJournal of the Meteorological Society of Japan, Vol.88 No.5. Ma Lei-Ming; Tan Zhe-Min - Meteorological Society of Japan, 2010A new scheme, termed Vortex Initialization with the Assimilation of Retrieved Variables (VIRV), is presented to improve the initialization of regional numerical model for Tropical Cyclone (TC) prediction. In this scheme, the horizontal winds in Planetary Boundary Layer (PBL) and the sea level pressure (SLP), retrieved from Quick Scatterometer (QuikSCAT) data obtained using a modified University of Washington Planetary Boundary Layer (UWPBL) model, are assimilated with a cycled three-dimensional variational (3DVAR) technique to produce the initialized analysis. The procedures of retrieval are i ...PermalinkJournal of the Meteorological Society of Japan, Vol.88 No.5. Kitamura Yuji - Meteorological Society of Japan, 2010To solve the problems of the Mellor-Yamada-Nakanishi-Niino (MYNN) model, we attempted to modify it by following the method proposed by Canuto et al. (2008) for the stable stratification case. In contrast to the original MYNN model, the modified model has no critical Richardson number, and the effect of turbulent motions remains for all Richardson number values in the level 2 model. Furthermore, the modified model possesses an advantage even for the level 2.5 and level 3 models. The flux Richardson number is unbounded, and a lower limit of the turbulent kinetic energy must be imposed in the ori ...PermalinkAtmospheric and Oceanic Science Letters, Volume 3 Number 5. Zhang Zi-Yin; Gong Zhong-Shi; Yan Qing; et al. - Science Press, 2010The Drake Passage is the seaway between South America and Antarctica. It is widely believed that the thermal isolation effects caused by the opening of the Drake Passage played an important role in the abrupt cooling that occurred at the Eocene-Oligocene boundary in the Cenozoic. These effects are also thought to be independent of the geometry of the passage. Here, the authors demonstrate that the climate impacts of the Drake Passage depend on the passage geometry by comparing the climate’s sensitivity to the opening of the Drake Passage under the present and the Early Eocene land-sea configur ...PermalinkAtmospheric and Oceanic Science Letters, Volume 3 Number 5. Zhang Zi-Yin; Gong Dao-Yi; He Xue-Zhao; et al. - Science Press, 2010Based on multiple proxies from the Southern Hemisphere, an austral summer (December-January-February: DJF) Antarctic Oscillation Index (AAO) since 1500 A.D. was reconstructed with a focus on interannual to interdecadal variability (PermalinkAtmospheric and Oceanic Science Letters, Volume 3 Number 5. Zhang Dong-Bin; Jin Fei-Fei; Li Jian-Ping; et al. - Science Press, 2010A numerical ensemble-mean approach was employed to solve a nonlinear barotropic model with stochastic basic flows to analyze the nonlinear effects in the formation of the North Atlantic Oscillation (NAO). The nonlinear response to external forcing was more similar to the NAO mode than the linear response was, indicating the importance of nonlinearity. With increasing external forcing and enhanced low-frequency anomalies, the effect of nonlinearity increased. Therefore, for strong NAO events, nonlinearity should be considered.PermalinkTo develop the lightning physics and the new lightning protection theory and technology, inversion of thunderstorm charged model was done based on E-field data at the ground level, which is a practical way to study the thunderstorm charged structure. Traditional inversion methods always fail, for actual thunderstorm charged structure is extraordinarily complex and objective functions are strongly non-linear. To solve this problem, quantum inversion methods were tried. We summed up and analyzed the quantum genetic algorithm(QGA), quantum annealing algorithm (QA) and quantum particle swarm optim ...PermalinkFor purpose of understanding geophysical nature of the crust, e.g. high conductance-low velocity zone and earthquake sources in mid-crust, a lot of experimental studies on dry rock system were performed. As it is well known that fluids exist in the crust, so far a few experiments on rocks combined with water (water-rock system) have been done. This paper reports experiments on water rock interactions at elevated temperatures and pressures, and provides the data about fluid nature and dissolution rates of rocks in the mid-crust.The mid-crust is present in the depth of 10(15) to 25 km below surf ...PermalinkIn this paper, a multiscale total variation method is applied to parameter identification problems for time-lapse seismic which consists of two or more seismic surveys shooting at different calendars. For the discontinuous parameters, a total variation regularization method is introduced instead of the traditional Tikhonov regularization. Combined with a multiscale method,a multiscale total variation regularization method is put forward to improve computational efficiency and accuracy. In numerical simulation, the multiscale total variation regularization method is compared with both the multi ...PermalinkChinese journal of Geophysics, Vol. 53 No.8. Dai Li-Ming; Li San-Zhong; Tao Chun-Hui; et al. - CGS, 2010The effect of subduction coupling zone on the Sunda fore-arc and its surrounding area is modeled using finite element analysis. Based on the simulation results, which are compared with GPS survey, seismological data and geological analysis, we quantitatively analyze the distribution of strain intensity and direction of principal strain of the Sumatra and its surrounding area. Then, the relationship between the area of subduction coupling zone and tectonic evolution is discussed accordingly. The model consists of lithosphere and upper mantle of athenosphere with visco-plasticity properties. The ...PermalinkChinese journal of Geophysics, Vol. 53 No.8. Xie Jun-Ju; Wen Zeng-Ping; Gao Meng-Tan; et al. - CGS, 2010Characteristics of near-fault vertical and horizontal ground motion from 2008 Wenchuan earthquake are investigated in this paper. Records from 40 strong motion stations along the Beichuan-Yingxiu fault with fault distance smaller than 120 km are used as database. Based on the analysis of peak ground acceleration, peak velocity, spectra acceleration and spectra ratio of vertical to horizontal ground motion, the following conclusions can be made: (1) Hanging wall effects are shown in PGA for near-fault ground motions within 60km to the fault rupture, the empirical model results in up to a 30%~40 ...PermalinkPhase velocity and polarization direction are the important parameters for studying seismic wave propagation and describing the media property, and they play essential roles in theory and application. This paper assumes that the symmetry axis of tilted transverse isotropy (TTI) media lies in the XOZ plane in observed coordinate system and we directly derive an analytic expression for phase velocity and polarization direction in TTI media in this system. Based on the Thomsen dimensionless anisotropic parameters and weak anisotropy approximation theory, we also derive the approximate expressions ...PermalinkIn the 21st century, strong earthquakes occur frequently in the world, especially in the region of southeastern Asia, and it has been into a new period of earthquake activities. Considering the serial of earthquakes (MS≥6.5) occurred in China continent, surrounding and Taiwan island, especially the outburst and abnormal peace in advance of Wenchuan MS8.0 earthquake of May 12, 2008, we can see that there is little shallow active process on surface and in upper crust that can be detected for short-term earthquake prediction, thus this earthquake is totally the result of the movement of deep crus ...PermalinkSeismic reflection method is usually used to explore the geological structure of underground. In the paper, by processing the data of a high resolution seismic survey line in the northeastern South China Sea, we obtained the subtle velocity structure and clear reflection images of seawater mass in the survey line. From the seismic profile, we can distinguish that the thermohaline structure of upper layer seawater in the northeast South China Sea is relatively steady. There isn’t obvious intrusion of other water mass. But in the middle layer seawater, internal waves can be found from the seismi ...PermalinkIn this paper, we present a joint inversion investigation of both three-dimensional crustal P-wave structures and hypocenter parameters using double-difference seismic tomography method in Beijing-Tianjin-Tangshan (BTT) region. The double-difference seismic tomography method was adopted to refine the absolute and relative event locations and P-wave velocity structures simultaneously with the direct use of both absolute arrival times and the more accurate differential travel times. These data came from the earthquake catalog records of totally 3983 events recorded by 112 stations from the North ...PermalinkSeismic migration is one of the most effective means to acquire subsurface structures in reflection seismic exploration. Among the migration methods in pre-stack depth domain at present, wave equation integral solutions based on ray theory and wave equation differential solutions based on one-way wave theory are widely applied in industry, which, however, both are difficult to deal with the seismic wave structure imaging problems of large lateral velocity variation and high-steep dip. In recent years, pre-stack reverse time migration developed in seismic exploration adopts the algorithm of usi ...PermalinkPermalinkis an issue of Chinese journal of Geophysics. CGS, 2010- DING Wei-Zhen, CAO Jin-Bin, ZENG Li, WANG Yan, YANG Jun-Ying
Simulation studies of plasma sheet ion boundary
- ZHANG Yan-Lei, WU Jian, ZHEN Wei-Min, MA Bao-Tian
An analysis on the ionospheric irregularities drift velocity using three ISM
- XU Li, HU Xiong, CHENG Yong-Qiang, GUO Shang-Yong, YAN Zhao-Ai, Xinzhao Chu
Simulation of echo-photon counts of a Sodium Doppler Lidar and retrievals of atmospheric parameters
- LI Lin, LI Chong-Yin, TAN Yan-Ke, CHEN Chao-Hui
Stratospheric sudden warming impacts on the weather/climate ...PermalinkAtmospheric and Oceanic Science Letters, Volume 3 Number 4. Mahmood Rashed; Yao Jin-Feng - Science Press, 2010South Asian monsoons were analyzed within the context of increasing emissions of black carbon (BC) aerosols using a global atmospheric general circulation model. The BC aerosols were allowed to increase only over the south Asian domain to analyze the impacts of regional black carbon over the climatological patterns of monsoons. The black carbon significantly absorbed the incoming short wave radiation in the atmosphere, a result that is consistent with previous studies. Pre-monsoon (March-April-May) rainfall showed positive anomalies, particularly for some coastal regions of India. The summer ( ...PermalinkSpace News, Vol. 21 Issue 24. Imaginova Corp., 2010PermalinkCLICO, 2010In contrast with the ubiquitousness of the headlines, empirically‐based research on the relationship between climate change, resource scarcity and conflict is often absent. The new EU project “Climate Change, Hydro‐conflicts and Human Security” (CLICO) will address this research gap. This policy brief presents CLICO’s research agenda regarding policy responses to climate change‐induced hydro‐conflicts. This policy brief is the first in a series of briefs presenting results of the CLICO project, which is funded by the 7th EU Framework Programme.PermalinkNational Academies Press, 2010America's Climate Choices is a coordinated set of activities convened in response to a request from Congress to "study the serious and sweeping issues associated with global climate change, including the science and technology challenges involved, and provide advice on actions and strategies the nation can take to respond." Expert committees were assembled to assess options and write consensus reports. Collectively, the America's Climate Choices reports provide a broad, action-oriented, and authoritative set of analyses to inform and guide responses to climate change across the nation.
...PermalinkSevere calamities and fatalities have arisen from landfalling tropical cyclones (TC) around the world in recent years, such as Morakot (August 2009) in western North Pacific, Nargis (May 2008) in Bay of Bengal, Gonu (June 2007) in North Arabian Sea, Bilis (July 2006) in western North Pacific, Katrina (August 2005) in Gulf of Mexico, and Catarina (March 2004) in South Atlantic etc. Transferring the advancements from the research community to operational forecast centers in NMHSs would be helpful for improving the landfalling tropical cyclone (LTC) forecasts and for mitigation of high-impact tro ...PermalinkIn the context of the EU 2010 goal of halting biodiversity loss, researchers have been called upon to evaluate the role of economic instruments for cost-effective decision-making, as well as non-market methods to assess their benefits. This paper reviews a number of methodological challenges of evaluating and designing economic instruments aimed at biodiversity conservation and ecosystem services provision in an existing policy mix. The study draws on experiences from Brazil and Costa Rica.PermalinkUNDP, 2010This updated handbook provides hands-on guidance for identifying the most effective technology options for poverty reduction and climate change mitigation and adaptation. By drawing on decades of experience and inputs from leading experts and practitioners, it brings novel insights for carrying out needs assessments and creating actionable plans as part of national climate change strategies.PermalinkPermalinkClifford Leon - 2010Surface temperature increases appear to be independant of wind speed suggesting that urban heating is not responsible for the long-term observed surface warming trend, according to new research that is to be published shortly.PermalinkWorld Meteorological Organization (WMO) ; Kepert Jeffrey David; Ginger J. D. - WMO, 2010 (WMO/TD-No. 1555)PermalinkPNUD, 2010Esta Guía actualizada de Evaluación de necesidades en materia de tecnología ha sido diseñada para ayudar a los países a adoptar decisiones informadas en sus elecciones de tecnología. Basándose en lecciones de esfuerzos de ENT anteriores de la última década, ofrece un enfoque sistemático para realizar evaluaciones de necesidades en materia de tecnología a fin de identificar, evaluar y establecer prioridades de medios tecnológicos para mitigación y adaptación. También proporciona procesos y metodologías para revelar brechas en capacidades y marcos favorecedores, y para formular un plan de acción ...PermalinkUNDP, 2010新版手册是与来自联合执行网络、英国爱丁堡大学环境变化与可持续发展研究中心和 斯德哥尔摩环境研究所（美国波士顿）的专家密切合作的结果。他们对手册的撰写都 做出了巨大的贡献。技术变化专家组的成员也在本书的写作过程中给予了宝贵的意见 和指导。PermalinkPNUD, 2010Ce Guide pour l’Évaluation des besoins technologiques pour le changement climatique révisé a été conçu dans le but d’aider les pays à prendre des décisions éclairées quant à leurs choix technologiques. S'appuyant sur les leçons tirées des évaluations des besoins technologiques issues de la dernière décennie, ce guide offre une approche méthodique de l'évaluation des besoins technologiques en vue d'identifier, d’évaluer et de prioriser les moyens technologiques, à la fois pour l'atténuation et pour l'adaptation. Il fournit également des procédés et des méthodes permettant de déceler les lacunes ...PermalinkPermalinkIntroduction: Model verification is an essential part of a Weather Prediction system. It is a helpful knowledge to enhance the forecaster’s assessment in Weather bulletin production. The aim of this study is to compare the global Forecast system (GFS) model rainfall prediction accumulated for 24 hours and averaged over October, November and December 2008 with the African Rain Fall Estimate (RFE 2.0) (Love et al.,2002) over DRCongo and the neighboring areas (from 15S to 6N latitudes and from 10E to 32E longitudes) fig.0.PermalinkThe objective of this work is thus to enhance an understanding on the regional and global patterns that may contribute to the knowledge of the variability and predictability of OND and JFM rains season over DRC for a better prediction of the rains season and also to improve the DRC seasonal models for a better decisions makers, and also assist potentials users on their needs.PermalinkThe WCRP Implementation Plan 2010-2015 describe the major research activities and initiatives that WCRP will promote and undertake during the next several years. These activities are based on the scientific challenges and opportunities of interest identified by the scientists involved in the programme, as well as on the national and international scientific priorities that would most benefit from the coordination and integration that can be provided by WCRP Projects and Working Groups.PermalinkAdvances in the geophysical sciences and computing have led to a number of opportunities for WMO. First, the distinction across timescales from weather to climate prediction is becoming more blurred; second the incorporation of chemical, hydrological and biological processes into weather and climate models will allow a much broader range of environmental parameters to be forecast, including air quality, flooding, sand and dust storms, changes in vegetation etc. Third, many of the applications and impacts of weather and climate share a common underlying scientific basis.PermalinkPermalinkis an issue of MeteoWorld. WMO, 2008Contains:
- Food security
- WCC-3: Better climate information for a better future
- Researching Pacific weather
- El Niño/La Niña
- Lakes and reservoirs
- Forest fires
- Network visualization
- Upper-air observing systemsPermalinkis an issue of MétéoMonde. OMM, 2008Contient:
- Sécurité alimentaire
- Lacs et réservoirs
- Incendies de forêt
- Visualisation de réseauxPermalinkis an issue of Antarctic Record. Scholarly and Academic Information Navigator (CiNii), 2008Contains:
- Estimation of enhanced electron density in the lower ionosphere using correlation between natural VLF emission intensity and CNA
- Meteorological observations at Syowa Station in 2005 by the 46th Japanese Antarctic Research Expedition (in Japanese)
- Report of the Anatarctic Place-names Committee of Japan-newly determined place-names and previously adopted place-names with Hepburn Romanization system- (in Japanese)Permalink
Atmospheric Monitoring and Inverse Modelling for Verification of National and EU bottom-up GHG inventories : report of the Workshop "Atmospheric Monitoring and Inverse Modelling for Verification of National and EU Bottom-up GHG Inventories" under the Mandate of Climate Change Committee Working Group I, Casa Don Guanella, Ispra, Italy (08-09 March 2007)The workshop "Atmospheric monitoring and inverse modelling for verification of national and EU bottom-up GHG inventories" was held on 08-09 March 2007 in Ispra, Italy, under the mandate of European Climate Change Committee Working Group 1, as follow-up of a first workshop on 23-24 October 2003. This report presents the summary and conclusions of the workshop and summaries of all workshop presentations.Permalink
PermalinkInterdisciplinary scientific studies were conducted from the RV Professor Logachev on the continental margins and in the basins of the Gulf of Cadiz and Western Mediterranean Sea during the 14th Training-through-Research cruise of UNESCO –IOC.PermalinkPermalinkWorld Meteorological Organization (WMO) ; CAS/JSC Working Group on Numerical Experimentation - WMO, 2005 (WMO/TD-No. 1276)PermalinkThe Global Energy and Water Cycle Experiment (GEWEX) of the World Climate Research Programme (WCRP), sponsored by the World Meteorological Organization (WMO), the International Council for Science (ICSU), and the Intergovernmental Oceanographic Commission (IOC) of the United Nations Educational, Scientific and Cultural Organization (UNESCO), has amassed an outstanding record of accomplishments during the first phase of its planned program. From bringing hydrology, land surface, and atmospheric sciences communities together, to showing the importance of understanding soil moisture/atmosphere an ...PermalinkWorld Meteorological Organization (WMO) ; International Council for Science (ICSU); Intergovernmental Oceanographic Commission (IOC) - WMO, 2005PermalinkPermalinkThis module discusses the basics of rip current formation and detection as well as the partnerships between the National Weather Service, National Sea Grant College Program, and the United States Lifesaving Association as they relate to rip current safety. This is one of three modules on forecasting rip currents.PermalinkWorld Meteorological Organization (WMO) ; CAS/JSC Working Group on Numerical Experimentation - WMO, 2004 (WMO/TD-No. 1220)PermalinkPermalinkPermalinkPermalinkPermalinkWorld Meteorological Organization (WMO) ; CAS/JSC Working Group on Numerical Experimentation - WMO, 2003 (WMO/TD-No. 1161)PermalinkAs part of the activities which WMO carries out in its Programme on the Physics and Chemistry of Clouds and Weather Modification Research, a Register of National Weather Modification Projects is kept. The Register has existed since 1975 when the Seventh World Meteorological Congress agreed that an inventory of activities within Member countries related to weather modification should be initiated and maintained. Periodic reviews have all recommended that the Register be continued. The Register is providing information also of interest to number of UN programmes outside WMO. This present Registe ...PermalinkPermalinkPermalinkPermalinkPermalinkPermalinkWorld Meteorological Organization (WMO) ; CAS/JSC Working Group on Numerical Experimentation - WMO, 2002 (WMO/TD-No. 1105)PermalinkThis present Register is the twenty third such publication issued. It is based on information obtained from Member countries on experiments and operations sponsored by government agencies or private concerns that took place during 2000.PermalinkPermalinkPermalinkPermalinkPermalinkPermalinkThe theme for World Meteorological Day was chosen in response to the United Nations having declared 2001 the International Year of Volunteers. This booklet, prepared for World Meteorological Day, gives recognition to volunteers worldwide. It highlights the valuable contributions of volunteers made over the years to the advancement of meteorology, hydrology and related geophysical sciences and their applications.Permalink