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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. ...
Weather and Desert Locusts
World Meteorological Organization (WMO) ; Food and Agriculture Organization (FAO) - WMO, 2016 (WMO-No. 1175)
The Global Climate in 2011–2015
This report describes the evolution of the climate system during the period 2011–2015. The World Meteorological Organization (WMO) has assessed this five-year period in order to contribute to a better understanding of multiyear warming trends and extreme events that can help governments to implement the United Nations Framework Convention on Climate Change more effectively.
Global Assessment of Sand and Dust Storms
United Nations Environment Programme (UNEP); World Meteorological Organization (WMO) ; United Nations Convention to Combat Desertification (UNCCD) - UNEP, 2016The specific objectives of the assessment are to:
1. Synthesise and highlight the environmental and socio-economic causes and impacts of SDS, as well as available technical measures for their mitigation, at the local, regional and global levels.
2. Show how the mitigation of SDS can yield multiple sustainable development benefits.
3. Synthesize information on current policy responses for mitigating SDS.
4. Present options for an improved strategy for mitigating SDS at the local, regional and global levels, building on existing institutions and agreements.
...
TCP. WMO/ESCAP Panel on Tropical Cyclones - Forty-third session : final report
World Meteorological Organization (WMO) ; Economic and Social Commission for Asia and the Pacific (ESCAP) - WMO, 2016
International Workshop on Satellite Analysis of Tropical Cyclones II (IWSATC-II), Report and Recommendations : final report
In this report, we summarize the reported changes in TC satellite analysis techniques since IWSATC-I (2011) and highlight the continued development of existing objective analysis methods as well as the emergence of new algorithms.
Flash Flood Guidance System (FFGS) with global coverage
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United States Agency for International Development (USAID); et al. - WMO, 2016Flash Flood Guidance System with global coverage (Res 21, Cg-XV) enhances early warning capabilities of the NMHSs, currently covers fifty two (52) countries and more than two billion people around the world saving lives and decreasing economic losses.
Drought Assessment Using SPEI and NDVI : Case of Lesotho
While drought conditions are generally a common and recurring phenomenon of the climate in Southern Africa especially Lesotho, the frequency of droughts in Lesotho has increased significantly over the past few years. Lesotho has suffered the devastating impacts of drought during the past several decades resulting in poor harvests and large livestock losses to rural farmers. The majority of the population in Lesotho engages with rain- fed agriculture and is dependent to some degree on own production for household food supply and/or cash income (Dejene, Midgley, & Marake, 2011). Any negative cha ...
Handbook of Drought Indicators and Indices
The purpose of this handbook is to cover some of the most commonly used drought indicators/indices that are being applied across drought-prone regions, with the goal of advancing monitoring, early warning and information delivery systems in support of risk-based drought management policies and preparedness plans. These concepts and indicators/indices are outlined below in what is considered to be a living document that will evolve and integrate new indicators and indices as they come to light and are applied in the future. The handbook is aimed at those who want to generate indicators and indi ...
Diagnosis Of Extreme Rainfall And Temperature Event Over Rwanda (1961-2010)
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 Seas ...
The Sahel Drought Mechanism: insights from two contrasting extreme events
The Sahel drought mechanism: insights from two contrasting extreme events during boreal summer July-August-September (JAS) is investigated in this study using the standardized precipitation index (SPI). Empirical orthogonal function (EOF) and composite analyses were deployed in this study, where the global precipitation climatology center (GPCC) rainfall data is used. The SPI shows large widespread decreasing rainfall trend in the Sahel in the mid-1980s; thereafter, Sahel rainfall have recovered somewhat through the late 1990s, even though the drought conditions have not ended in the region. A ...
Projection of Future Streamflow Changes in the Pearl River Basin
Global 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 ...
Spatial-temporal analysis and variability of meteorological drought during pre and south west monsoon period in Myanmar
The current study is an attempt to assess meteorological drought in Myanmar during the South west pre monsoon and monsoon period using observed rainfall data from 34 stations in Myanmar spanning from 1971 to 2010. The components of drought that were analyzed in this study were severity, persistence, frequency and probability of occurrence. Additional, trends in drought occurrence were analyzed using the Mann-Kendall (MK) method while the wavelet analysis was applied to PI value to identify various periodic processes.
Система оценки риска возникновения быстроразвивающихся паводков (СОРВБП) с глобальным охватом
Всемирная Метеорологическая Организация (BMO); National Oceanic and Atmospheric Administration (NOAA); United States Agency for International Development (USAID); et al. - BMO, 2016Система оценки риска возникновения быстроразвивающихся паводков (СОРВБП) с глобальным охватом (резолюция 21, Кг-XV) расширяет возможности НМГС для заблаговременного предупреждения, охватывает сейчас 52 страны и более двух миллиардов человек во всем мире, спасая жизни и снижая экономические потери.
Sistema guía para crecidas repentinas (FFGS) con cobertura mundial
Organización Meteorológica Mundial (OMM); National Oceanic and Atmospheric Administration (NOAA); United States Agency for International Development (USAID); et al. - OMM, 2016El Sistema Guía para Crecidas Repentinas con cobertura mundial (Resolución 21, Cg-XV) dota a los Servicios Meteorológicos e Hidrológicos Nacionales de mejores capacidades de alerta temprana y abarca en la actualidad a 52 países y a más de 2 000 millones de personas en todo el mundo, salvando vidas y reduciendo pérdidas económicas.
Système d’indications relatives aux crues éclair (FFGS) - A couverture mondiale
Organisation météorologique mondiale (OMM); National Oceanic and Atmospheric Administration (NOAA); United States Agency for International Development (USAID); et al. - OMM, 2016Le Système d’indications relatives aux crues éclair à couverture mondiale (Résolution 21, Cg-XV) vise à renforcer l’aptitude des SMHN à émettre des alertes précoces. Il couvre actuellement cinquante-deux (52) pays et plus de deux milliards de personnes dans le monde, et permet de sauver des vies et de réduire les pertes économiques.
دلیل المؤشرات والأرقام القیاسیة للجفاف
المنظمة العالمية للأرصاد ; Global Water Partnership (GWP) - المنظمة العالمية للأرصاد, 2016 (مجموعة مطبوعات المنظمة-No. 1173)الغرض من ھذا الدلیل ھو تغطیة بعض أكثر المؤشرات/ الأرقام القیاسیة للجفاف شیوعاً التي یجري تطبیقها في جمیع المناطق المعرضة للجفاف، بهدف تعزیز نُظم المراقبة والإنذار المبكر وتقدیم المعلومات الداعمة لسیاسات إدارة الجفاف وخطط التأھب لھ القائمة على المخاطر. وھذه المفاھیم والمؤشرات/ الأرقام القیاسیة مبینة أدناه فیما یُعتبر وثیقة تداولیة سوف تتطور وتضم مؤشرات وأرقاماً قیاسیة جدیدة مع ظهورھا وتطبیقها في المستقبل. والدلیل موجھ إلى أولئك الذین یریدون إعداد مؤشرات وأرقاماً قیاسیة بأنفسهم، وكذلك إلى أولئك الذین یریدون فحسب الحصول على نواتج أُعدت في مكان آخر واستخدامها. والمقصود ھو استخدامھ من جانب الممارسی ...
الطقس والجراد الصحراوي
المنظمة العالمية للأرصاد ; منظمة الأغذية والزراعة للأمم المتحدة - المنظمة العالمية للأرصاد, 2016 (مجموعة مطبوعات المنظمة-No. 1175)
Manuel des indicateurs et indices de sécheresse
Organisation météorologique mondiale (OMM); Global Water Partnership (GWP) - OMM, 2016 (OMM-No. 1173)Le manuel présente les indicateurs et les indices les plus couramment employés dans les régions sujettes à la sécheresse dans le but de faire progresser le suivi, l’alerte précoce et la diffusion de l’information à l’appui des politiques de gestion des situations de sécheresse et des plans de préparation axés sur les risques. Les méthodes et les notions qui les accompagnent y sont brièvement exposées. Ce document est appelé à évoluer et à s’enrichir à mesure que de nouveaux indicateurs et indices seront élaborés et mis en pratique. Il intéressera les personnes qui souhaitent définir leurs prop ...
Справочник по показателям и индексам засушливости
Всемирная Метеорологическая Организация (BMO); Global Water Partnership (GWP) - BMO, 2016 (BMO-No. 1173)Цель настоящего справочника заключается в том, чтобы описать самые распространенные показатели/индикаторы засушливости, которые применяются в подверженных засухам регионах, с целью совершенствования систем мониторинга, заблаговременного предупреждения и представления информации в поддержку политических мер в области борьбы с засухами с учетом рисков и в поддержку планов обеспечения готовности. Эти концепции и показатели/индексы кратко изложены в нижеследующем тексте, призванном быть интерактивным документом, который в дальнейшем будет развиваться и включать новые показатели и индексы по мере и ...
干旱指标与指数手册
本手册旨在涵盖适用于干旱易发区域最常用的干旱指标/指数，目的是促进监 测、早期预警和信息提供系统，以支持基于风险的干旱管理政策和备灾计划。 这些概念和指标/指数将在下文进行介绍，它是一份动态文件，随着新指标和指 数出现及在未来的适用性加以更新及整合。本手册面向那些希望制作其自身指 标和指数的机构以及针对那些只愿意获取和使用为其它地区所制作的产品的机 构。本手册适用于一般干旱从业人员使用（例如，气象/水文部门、资源管理者 及其它各级决策者），并旨在作为一个起点，表明哪个指标/指数可用，并在全 球投入实际使用。此外，本手册的制定考虑到了干旱风险管理过程。然而，本 出版物并非旨在推荐一套“最佳”指标和指数。对指标/指数的选择是根据与利益 攸关方关注的影响最密切关联的干旱具体特点。
Manual de indicadores e índices de sequía
La finalidad del presente manual es tratar algunos de los indicadores e índices de sequía de uso más habitual en las regiones más propensas a las sequías, con el objeto de impulsar sistemas de vigilancia, de alerta temprana y de suministro de información que respalden los planes de preparación y las políticas de gestión de la sequía basados en riesgos. Estos conceptos e indicadores o índices se describen a grandes rasgos a continuación, en lo que se considera un documento dinámico que evolucionará e incorporará nuevos indicadores e índices a medida que estos salgan a la luz y se apliquen en el ...
المناخ العالمي في 2015–2011
في توحید أفضل المعلومات المناخیة المتاحة من المرافق الوطنیة للأرصاد الجوية والهیدرولوجیا في بیانات سنوية عن حالة المناخ العالمي. وفي عام 2013 ، أصدرت المنظمة ( WMO ) ملخصاً عقدياً عن المناخ غطى الفترة 2001 - 2010 . ومنذ عام 2006 ، أنتجت المنظمة WMO) ) أيضاً نشرات سنوية عن غازات الاحتباس الحراري تقدّم إفادة عن تركیزات غازات الاحتباس الحراري في الغلاف الجوي التي تدفع إلى تغیر المناخ. ولقد كانت التأثیرات المبكرة لتغیر المناخ واضحة باستمرار على النطاق العالمي منذ ثمانینیات القرن الماضي، وهي: زيادة درجة حرارة العالم على الیابسة وفي سطح وأعماق المحیطات، وارتفاع مستوى سطح البحر، وانصهار طبقات الجلید ...
Estado del clima mundial en 2011–2015
El presente informe describe la evolución del sistema climático durante el período comprendido entre 2011 y 2015. La Organización Meteorológica Mundial (OMM) ha evaluado este período de cinco años con el fin de contribuir a comprender mejor las tendencias plurianuales al calentamiento y los fenómenos extremos que pueden ayudar a los gobiernos a aplicar con mayor eficacia la Convención Marco de las Naciones Unidas sobre el Cambio Climático. Esto se aplica en particular al Acuerdo de París de 2015, que proporciona a la comunidad mundial una oportunidad histórica para actuar con más urgencia en l ...
Le climat mondial 2011–2015
Le présent rapport décrit l’évolution du système climatique entre 2011 et 2015. L’Organisation météorologique mondiale (OMM) a analysé ces cinq années afin de mieux comprendre le réchauffement constaté sur cette période, ainsi que les phénomènes extrêmes et, par là même, aider les gouvernements à mettre en oeuvre de manière plus efficace la Convention-cadre des Nations Unies sur les changements climatiques (CCNUCC), et en particulier l’Accord de Paris. Adopté en 2015, ce dernier représente, pour la communauté internationale, une occasion sans précédent d’accélérer les efforts visant à limiter ...
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Airborne Dust: A Hazard to Human Health, Environment and Society
Over the last decade, the scientific community has come to realize the important impacts of airborne dust on climate, human health, the environment and various socio-economic sectors. WMO and its Members, having started implementation of monitoring, forecasting and early warning systems for airborne dust in 2004, are at the vanguard on evaluating these impacts and developing products to guide preparedness, adaptation and mitigation policies. 1 2
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China’s Implementation of Impact and Risk-based Early Warning
China is one of the countries most affected by meteorological hazards. From 1984 to 2014, on average per annum meteorological hazards caused 4 066 deaths and 192.2 billion Chinese Yuan Renminbi (CNY, US$ 30.5 billion) direct economic losses – 2% of the Chinese Gross Domestic Product (GDP). The annual average loss ratio (direct economic losses/annual GDP) halved from 2.08% from 1984 to 2000 to 1.03% from 2001 to 2014, thanks to improved disaster prevention and mitigation measures. That 1.03% ratio is still 8 times higher than the global average (0.14%) and 3 times higher than that of the United ...
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Towards Substantially Reduced Disaster Risk in 2030
Bulletin, Vol. 64(2). WMO, 2015The Sendai Framework for Disaster Risk Reduction 2015-2030 (Sendai Framework) adopted on 18 March is the first major agreement of the 2015 agenda. Its seven global targets and four priorities for action are highly relevant to WMO. Disaster risk reduction (DRR) is one of the seven priority areas of the Organization. Protecting lives, livelihoods and property is at the core of its mission – thus, WMO will support the Sendai Framework through a wide range of scientific and technical activities.1
Vol. 63(2) - 2014 - Tiempo y clima - Conocimiento de los riesgos y preparación frente a la variabilidad y los extremos
is an issue of Boletín. Organización Meteorológica Mundial (OMM); Organización Meteorológica Mundial (OMM) - OMM, 2015
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The Weather: What’s the Outlook?
New sources of atmospheric observations, faster supercomputers and advances in science together revolutionized weather forecasting in the latter part of the 20th century. On the global scale, we can today predict up to five days ahead as accurately as we could do for three days 20 years ago. This means society has much more advance warning of weather hazards than before, permitting people to prepare and, thereby, limit the loss of lives and property. Expectations are high for even greater advances in the years to come.
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Interview: Qing-Cun Zeng
Qing-Cun Zeng, a famous academic meteorologist, is a pioneer of numerical weather prediction, dynamic climate prediction and remote sensing theory for meteorological satellites. His semi-implicit (1961) and quadratic (1981) schemes as well as his inversion variation method (1974) are still widely applied to theoretical and practical studies in meteorology and geophysical fluid dynamics. Through his active involvement in the study of global climate and environmental change, he has contributed to advancements in the study of meteorological hazards and related disaster risk reduction. He has rece ...
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Building Climate Resilience through Disaster Risk Reduction
Natural hazards involving weather, climate and water are a major source of death, injury and physical destruction. Over the past decade (2005-2014), 3 253 hydrometeorological hazards were reported around the world, resulting in 283 0351 deaths and economic losses amounting to US$ 983 million.
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Strengthening urban resilience in Bangladesh
This brochure is part of a series highlighting the World Bank's achievements in disaster risk management initiatives. The brochure offers lessons learned on managing disaster risk and promoting urban resilience and it presents Bangladesh's path-breaking Urban Resilience Project, the product of a collaborative effort among the government, the World Bank, and GFDRR, which equips key government agencies with state-of-the art emergency management facilities and improves construction permitting processes.
Use of Probabilistic Guidance in Local Tropical Cyclone Wind Forecasting
This lesson describes the role of forecasters in supporting emergency managers during tropical cyclones with a focus on the wind hazards. It provides an overview of the wind speed products produced by the National Weather Service, including how they are used to create local wind forecasts. Learners will practice interpreting probabilistic wind speed guidance and conveying appropriate wind speed information to decision-makers using projected scenarios of hazardous wind events. Developing messages for emergency managers and the public that include the potential wind speed, threat, and impact inf ...
Tropical Cyclone Forecast Uncertainty
This lesson introduces learners to the uncertainty and errors in forecasting the track, timing, and intensity of tropical cyclones. It provides an overview of how the National Hurricane Center’s cone of uncertainty is constructed, as well as its uses and common misconceptions. Learners will explore the influences of track, timing, and intensity forecast errors on potential tropical cyclones impacts. The lesson offers suggestions on how to communicate tropical cyclone forecasts knowing their inherent uncertainty. This online lesson is part of the Tropical Cyclone Storm Winds: Forecasting and Co ...
Determining the Onset and Risk of Tropical Cyclone Winds
This lesson introduces forecasters to the probabilistic guidance products used by the National Hurricane Center to assess tropical cyclone wind threats. It provides an overview of how these probabilistic wind speed products are created, their purposes, and how to interpret them. The lesson also provides practice in determining the total risk and timing for location-specific peak wind events. This online lesson is part of the Tropical Cyclone Storm Winds: Forecasting and Communication course.
Introduction to Climatology for the Tropical Pacific Islands
This lesson provides information on climatology—what it is, the factors that create an area's climate, and the sources and uses of climate information. Focused specifically on tropical Pacific islands, the content covers the key features influencing climate in that region and includes examples for four locations distributed across the tropical Pacific Ocean, both north and south of the equator. The lesson provides a basic introduction to tropical climatology intended for a wide range of users, from meteorology technicians, forecasters, and scientists, to those in industries or sectors influenc ...
Forecasting Heavy Rains and Landslides in Eastern Africa
Good rainfall draws many people to settle across the eastern Africa highlands for farming and other businesses. However, factors such as steep terrain, logging, livestock grazing, agriculture, and construction, have increased erosion and contributed to less stable slopes. These factors can lead to devastating landslides and mudslides, especially during episodes of very heavy rain. Forecasting and monitoring heavy rainfall is challenging, especially in mountainous regions that have few surface observations. This make satellite data critical for meteorologists and hydrologists forecasting for th ...
Introduction to Tropical Cyclone Storm Surge
This lesson introduces forecasters to the physical processes and impacts of tropical cyclone storm surge. It provides an overview of the factors that affect storm surge, how it is measured, and the limitations associated with storm surge data. This online lesson is part of the Tropical Cyclone Storm Surge: Forecasting and Communication course.
Overview of Watershed and Channel Sedimentation
This lesson provides an overview of the primary influences of watershed and channel sedimentation. In a short narrated portion of the lesson, we explore a section of the Rio Grande watershed and channel in New Mexico using Google Earth imagery, river profiles, and graphic animations. We highlight features of the upland catchments, the river channel, and the Elephant Butte Reservoir. We then demonstrate how environmental factors (climate, geography, land use changes, reservoirs) impact the supply and movement of sediments for the Rio Grande and other rivers. The focus is on the three primary pr ...
SDS-WAS, 2015-001. Dust/ sand storms over Libya : Spatial distribution, frequency and seasonality, technical report
The climate of most of the coastal region of Libya can be classified as semi-arid, while that of the rest of the country is arid. Rainfall is erratic with extremely variable yearly rainfall amounts: a series of dry years may follow a year with adequate rainfall. Furthermore, monthly and seasonal totals are not homogenous and most precipitation occurs during winter months.
Dust and sand storms, the focus of the present study, are one of the main extreme weather phenomena that affect Libya. In this paper, spatial and temporal distribution, frequency and seasonality are studied and analyze ...
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