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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.
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 ...
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 ...
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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Extreme weather and resilience of the global food system
This report examines the resilience of the global food system to extreme weather.
This summary is built on three detailed reports and presents evidence that the global food system is vulnerable to production shocks caused by extreme weather, and that this risk is growing. It highlights evidence that our reliance on increasing volumes of global trade, whilst having many benefits, also creates structural vulnerability via a liability to amplify production shocks in some circumstances. It argues that action is needed to improve the resilience of the global food system to weather-re ...
Seamless prediction of the Earth system : from minutes to months
This book collects together White Papers that have been written to describe the state of the science and to discuss the major challenges for making further advances. The authors of each chapter have attempted to draw together key aspects of the science that was presented at WWOSC-2014. The overarching theme of this book and of WWOSC-2014 is “Seamless Prediction of the Earth System: from minutes to months”. The book is structured with chapters that address topics regarding: Observations and Data Assimilation; Predictability and Processes; Numerical Prediction of the Earth System; Weather-relate ...
WMO Guidelines on Multi-hazard Impact-based Forecast and Warning Services
Improving the understanding of the potential impacts of severe hydrometeorological events poses a challenge to NMHSs and their partner agencies, particularly disaster reduction and civil protection agencies (DRCPAs). These Guidelines establish a road map that identifies the various milestones from weather forecasts and warnings to multi-hazard impact-based forecast and warning services.
For completeness, these Guidelines also describe the ultimate step of forecasting actual impacts, although it is recognized that this is a highly sophisticated exercise, requiring strong collaboration w ...
The Climate in Africa: 2013
In Africa in 2013, the critical weather and climate trends of the last decades continued: it was one of the warmest years on the continent since at least 1950, with temperatures above average in most regions. Precipitation at the continental scale was near average. But several extreme events hit the region. The floods that hit Mozambique in January were among the 10 most severe in the world that year, based on the number of deaths. In contrast, the rains in Namibia and neighboring countries fell well below normal, leading to a severe drought.
Directives de l’OMM sur les services de prévision et d’alerte multidanger axées sur les impacts
Mieux comprendre les incidences potentielles des phenomenes hydrometeorologiques violents represente un defi pour les SMHN et leurs partenaires, notamment les organismes de protection civile et de prevention des catastrophes. A cette fin, les presentes directives repertorient les diverses etapes a suivre, depuis l’elaboration de previsions et d’alertes meteorologiques jusqu’a la prestation de services de prevision et d’alerte multidanger axees sur les impacts.
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