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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 ...
Satellite-Derived Climatology Products for Monitoring Convection Over West and Central Africa
A weather forecaster’s knowledge of climatology is important to the success of a forecast, especially where convection is involved. That’s particularly true over Central and West Africa where convection has a strong diurnal cycle and usually develops over particular geographic regions and during specific time intervals. The lesson describes satellite-derived cloud climatology products and several global instability indices, all of which can be integrated with other products to forecast convection. Although the lesson uses examples of climatology products from specific months, it makes the full ...
ASMET: Flooding in West Africa
The rainy season in Sahelian West Africa extends from June to September and is tied to the position of the intertropical front. During this period, mesoscale convective systems (MCSs) often produce significant rainfall that can lead to flooding. This module examines an extreme flooding event that occurred in Ouagadougou, Burkina Faso from 31 August to 1 September 2009. Learners assume the role of forecaster, assessing meteorological conditions to see if an MCS will develop that can lead to heavy rain and flooding. They follow a forecast process that emphasizes the use of satellite data, standa ...
Ending the everyday emergency: resilience and children in the Sahel
This report demonstrates that shortage of food is only part of the severe and life-threatening crisis facing children in the Sahel region of west Africa in 2012. It focuses in particular on the experience of children, and makes detailed recommendations around disaster risk reduction, nutrition, and social protection to build resilience. The report also addresses the urgent need for political ambition to change the international system and end the everyday emergencies.
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The perfect storm
Global Change magazine, Issue 76. IGBP, 2011
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Sécurité des moyens d’existence : changements climatiques, migrations et conflits au Sahel
PNUE, 2011Cette étude commune à paraître a deux objectifs : premièrement d’analyser l’évolution historique du climat dans le Sahel, d’identifier les régions où des problèmes se posent avec une acuité particulière (nommées « points chauds ») et de déterminer les implications potentielles des variations climatiques observées sur les moyens d’existence dépendants des ressources naturelles ; deuxièmement de fournir des recommandations destinées à améliorer la sensibilité des plans d’adaptations et d’investissement de la région aux problématiques de conflit et de migration.
CAgM Report, 51. Scientific lectures presented at the tenth session of the Commission for Agricultural Meteorology
World Meteorological Organization (WMO) ; Sivakumar Mannava V.K.; Villalpando J.F. - WMO, 1992 (WMO/TD-No. 514)Conatins:
- Maracchi, G. Agrometeorological Information for Agricultural Systems subjected to climatic variability.
- Sivakumar, M.V.K., C. Renard,and J.M. Powell. Agroclimatic considerations for sustainable agro-silvi-pastoral systems in the Sudano-Sahelian Zone.
- Villalpando, J.F. Importancia Economica de la Information Agrometeorológica. (Spanish)
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GAW Report, 27. Report on the study of transport of Sahelian particulate matter using sunphotometer observations
World Meteorological Organization (WMO) ; Global Environmental Monitoring System - WMO, 1985 (WMO/TD-No. 45)
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