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Notes: If you wish to download the full text, please contact library(at)wmo.int (Please replace (at) by @).
Language(s): Russian
Format: Digital (Available online for logged-in users)Tags: Weather forecasting ; Mongolia ; Thesis - WMO Fellowship Division
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Spatial/Temporal Distribution of Rainfall and the Dynamic Factors Associated over African Great Lakes Region from 1981 to 2016
Based on Global Precipitation Climatology center (GPCC) precipitation data and Era-Interim Zonal and Meridional wind, relative humidity, Sea Level Pressure and Sea surface temperature data from ECMWF, Statistical methods were conducted to find out the interannual variability of rainfall and its dynamic factors in AGLR from 1981 to 2016. The results show that there are two (long and short) rainfall seasons over AGLR, MAM and OND respectively. The empirical orthogonal function was used to reveal through the dominant principal components (PC1) of the first EOF, the extreme years (wet and dry) for ...
Spatial/Temporal Distribution of Rainfall and the Dynamic Factors Associated over African Great Lakes Region from 1981 to 2016
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Published by: College of Atmospheric Science ; 2019
Based on Global Precipitation Climatology center (GPCC) precipitation data and Era-Interim Zonal and Meridional wind, relative humidity, Sea Level Pressure and Sea surface temperature data from ECMWF, Statistical methods were conducted to find out the interannual variability of rainfall and its dynamic factors in AGLR from 1981 to 2016. The results show that there are two (long and short) rainfall seasons over AGLR, MAM and OND respectively. The empirical orthogonal function was used to reveal through the dominant principal components (PC1) of the first EOF, the extreme years (wet and dry) for both MAM and OND. Since previous analysis have shown that OND rainfall has high variability than the long rainy season MAM, further analysis (composite analysis) was conducted to investigate the dynamic factors behind the extreme (wet and dry) years for OND season. Results of composite analysis suggest that the Indian Ocean SST regulates the precipitation over the study area; warm SST influences the wind circulation resulting in an upward motion of warm air due to convergence of wind during wet years and the contrary is observed during dry years.
Notes: If you wish to download the full text, please contact library(at)wmo.int (Please replace (at) by @).
Language(s): English
Format: Digital (Available online for logged-in users)Tags: Precipitation ; Region I - Africa ; Thesis - WMO Fellowship Division ; Interannual variability ; SST
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The comparison of SWH from ocean wave spectra and nadir beam of SWIM
The surface wave investigation and monitoring (SWIM) will be one of the two payload instruments carried by China France Oceanography Satellite (CFOSAT) with a planned launch date in mid-2018. SWIM has six beams rotating around the vertical axis at incidence angles 0,2,4,6,8,10 degree. With nadir-beam, the SWH and wind speed can be detected as the same principle as an altimeter. At the same time, the ocean wave spectrum beams can also Catch the significant wave height (SWH). To find which SWH is more stable and accurate, first, the thesis presents an overview of SWH detection from a satellite. ...
Published by: School of Marine Science, NUIST, ; 2018
The surface wave investigation and monitoring (SWIM) will be one of the two payload instruments carried by China France Oceanography Satellite (CFOSAT) with a planned launch date in mid-2018. SWIM has six beams rotating around the vertical axis at incidence angles 0,2,4,6,8,10 degree. With nadir-beam, the SWH and wind speed can be detected as the same principle as an altimeter. At the same time, the ocean wave spectrum beams can also Catch the significant wave height (SWH). To find which SWH is more stable and accurate, first, the thesis presents an overview of SWH detection from a satellite. Then the principles of SWH detected from the altimeter, and the spectra beams of SWIM are reviewed. Finally, the comparison of SWH from ocean wave spectra beam and nadir beam of SWIM is performed according to the simulated data. The results show that the SWH from nadir beam is more accurate and stable than from spectra beam.
Notes: If you wish to download the full text, please contact the library (library(at)wmo.int (Please replace (at) by @).
Language(s): English
Format: Digital (Free)Tags: Wave ; Oceans ; Thesis - WMO Fellowship Division ; SWH, SWIM, Ocean Wave Spectrum
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Гидродинамический прогноза погоды на территории Гвинеи
Agriculture is the largest employer in the world and is probably the most dependent on the climate of all human activities. In recent years there have been events that have put in evidence the vulnerability of global food security to major meteorological phenomena, both in global agricultural markets and the world economy. The food price crisis and the subsequent economic crisis reduced the purchasing power of large segments of the population in many developing countries, which seriously reduced their access to food and thus undermined their food security. During the years 2009 and 2010 in Ven ...
Published by: Министерство Образования и Науки Российской Федерации ; 2018
Agriculture is the largest employer in the world and is probably the most dependent on the climate of all human activities. In recent years there have been events that have put in evidence the vulnerability of global food security to major meteorological phenomena, both in global agricultural markets and the world economy. The food price crisis and the subsequent economic crisis reduced the purchasing power of large segments of the population in many developing countries, which seriously reduced their access to food and thus undermined their food security. During the years 2009 and 2010 in Venezuela there were strong weather anomalies, drought in the first case and the second extreme rains, caused mainly by the effect of the El Niño-Southern Oscillation (ENSO) event, with warm phase (El Niño) in 2009 and cold phase (La Niña) in 2010, affecting farming, mostly in Monagas, Anzoátegui and Guárico States negatively influencing its economy. The planning of agricultural production based on the use of agricultural information, as calendars of sowing, as well as the monitoring of the conditions during the crop cycle and the use of agrometeorological forecasting, then is of great importance for the development of the agricultural sector, because it minimizes the effects on food production which might be affected by climate variability, making it less vulnerable. Model results confirm the importance of known key physiological processes, such as the shortening of the time to maturity of a crop with increasing mean temperature, decline in grain set when high temperatures occur during flowering, and increased water stress at high temperatures throughout the growing cycle. Temperature responses are generally well understood for temperatures up to the optimum temperature for crop development. The impacts of prolonged periods of temperatures beyond the optimum for development are not as well understood. For this study the agro meteorological stations selected have daily records of all climatic elements, so it held a summary monthly apart from daily data (with prior quality control) for the accumulated monthly rainfall and temperature maximum and minimum for the 1971-2010 series. Therefore, Inter decadal rainfall and temperature analysis and the use of the cropwat 8.0 to model future scenarios can be estimated water requirements of main crops, allowing some adaptation measures to help mitigate the effects of climate change in the country's agricultural production. In selected stations were determined significant changes on ETc when the temperature increase and the availability of water is a key factor to reach the harvest. Adaptation measurements involve reducing risk and vulnerability; for developing countries rely heavily on climate-dependent agriculture and especially in conjunction with poverty and rapid increase in population they are vulnerable to climate change.
Notes: If you wish to download the full text, please contact the author (leilacudemus(at)hotmail.com) or library(at)wmo.int (Please replace (at) by @).
Language(s): Russian
Format: Digital (Free)Tags: Weather forecasting ; Guinea ; Thesis - WMO Fellowship Division
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Evaluation of subseasonal prediction of extreme rainfall events and their relationship with the Madden Julian Oscillation over the Solomon Islands
The conference provides an opportunity for students especially PhD students to present their work and get feedback from other professionals. Not only that but the it also offers an excellent chance for networking among aspiring scientists and the possibility for future collaborations.
Evaluation of subseasonal prediction of extreme rainfall events and their relationship with the Madden Julian Oscillation over the Solomon Islands
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Published by: University of Reading ; 2017
The conference provides an opportunity for students especially PhD students to present their work and get feedback from other professionals. Not only that but the it also offers an excellent chance for networking among aspiring scientists and the possibility for future collaborations.
Notes: If you wish to download the full text, please contact the author (david.hiba(at)met.gov.sb>) or library(at)wmo.int (Please replace (at) by @).
Language(s): English
Format: Digital (Free)Tags: Thesis - WMO Fellowship Division ; Precipitation forecasting
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Study of interannual variability of October-December rainfall season over Djibouti
Rainfall is a very important weather and climate parameter that affects social and economic activities in Djibouti. This leads to droughts, floods and humanitarian disasters over the country. The rainfall climatology of the country has some changes which need to be taken into account while planning for economic activities such as civil and structural engineering. The whole country receives significant rains in the months of (October – December) and (March – April) as known except for the southern parts of the country. The southern part of the country gets its rains in the months of (June to Au ...
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Diagnosis of floods/drought and their associated circulation anomaly over Malawi
Floods and droughts are one of extreme weather climatic events that result in loss of life and property in Malawi. However, a well detailed knowledge of understanding of previous extreme climatic events and their associated impacts can be a precautionary in reducing their impacts, as it will help to project future events timely. Therefore this paper presents an analysis of Dec-Feb seasonal flood/drought events and their associated circulation anomalies over Malawi. The DJF seasonal flood/drought was studied using monthly data from 9 selected stations for the period of 1978-2010. A set of regio ...
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Change of diurnal precipitation in different phases of Bsiso
As we know tropical intraseasonal oscillation (ISO) was described as 2 modes such as Boreal summer intraseasonal oscillation (BSISO) during boreal summer and Madden-Julian Oscillation (MJO) dominates during boreal winter. In summer time, Thailand where located at the coastal region at the Equator which is effected by BSISO. Some week there is strong diurnal cycle but some week is opposite. The purpose of this work is to study the evolution of BSISO and to study the change of diurnal precipitation in different phases of BSISO. Tropical Rainfall Measuring Mission (TRMM) version 3B42 data on 0.25 ...
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Analysis inter decadal of climate variability facing projections of the CMIP5 models and its involvement in the agricultural production of Venezuela
Agriculture is the largest employer in the world and is probably the most dependent on the climate of all human activities. In recent years there have been events that have put in evidence the vulnerability of global food security to major meteorological phenomena, both in global agricultural markets and the world economy. The food price crisis and the subsequent economic crisis reduced the purchasing power of large segments of the population in many developing countries, which seriously reduced their access to food and thus undermined their food security. During the years 2009 and 2010 in Ven ...
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Climate change effect on wheat production over Ethiopia by model simulation and prediction
Climate is one of the key factors that affect agriculture. Climate change and climate variability have been observed, typically shown as global warming due to the increased greenhouse gases. The change in climate is even predicted to be rapped and sharp in recent future and the impacts of extreme climate condition associated with climate change will be high on agriculture. Studying the impacts of climate change, especially the effects of temperature and precipitation on agriculture, is important for food safety, agricultural management, and sustainable development.
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Les systèmes convectifs pendant la mousson en région tropicale : Mémoire de fin d’étude pour l’obtention du diplôme de technicien supérieur de la météorologie
Dans ce travail nous avons voulu étudier sur la zone tropicale les liens entre les systèmes convectifs et la pluie. L’algorithme TOOCAN introduit a pour but d’améliorer la caractérisation de l’évolution du bouclier nuageux associe aux systèmes convectifs au cours de leur cycle de vie. Des composites des structures précipitantes au cours du cycle de vie du système nuageux organise sont alors construits en fusionnant les données des satellites géostationnaires avec des estimations de précipitations issues des mesures micro-ondes à bord des satellites défilant. L’objectif de ce travail est non se ...
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Variability of the West African summer Monsoon and its relation to the SSTA over the Atlantic Ocean
This study investigates spatial and temporal features of the West African Summer Monsoon (WASM) and its relation to the Sea Surface Temperature Anomaly (SSTA). The variability of the WASM from June to September was analyzed during the period 1960-2013, with methods including EOF analysis of the precipitation anomaly and SSTA and the associated large scale circulation pattern. The result from the first EOF-Mode of the precipitation anomaly which has the highest positive loadings over the region shows that during the summer, the precipitation anomalies are positives in the Sahel and the Sahara. ...
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Statistical approach towards subseasonal prediction over the Maritime Continent
Ismail Norlaila - 이화여자대학교 대학원, 2016
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