1 Impact of Tropical SST Anomalies on West African Rainfall
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منابع مشابه
Impacts of the Tropical Pacific/Indian Oceans on the Seasonal Cycle of the West African Monsoon
The current consensus is that drought has developed in the Sahel during the second half of the twentieth century as a result of remote effects of oceanic anomalies amplified by local land–atmosphere interactions. This paper focuses on the impacts of oceanic anomalies upon West African climate and specifically aims to identify those from SST anomalies in the Pacific/Indian Oceans during spring a...
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This work presents a description of the 1979–2002 tropical Atlantic (TA) SST variability modes coupled to the anomalous West African (WA) rainfall during the monsoon season. The time-evolving SST patterns, with an impact on WA rainfall variability, are analyzed using a new methodology based on maximum covariance analysis. The enhanced Climate Prediction Center (CPC) Merged Analysis of Precipita...
متن کاملMoist Zonally-Symmetric Models and their Applications to West African Monsoons
In this thesis, we have developed several zonally-symmetric models with explicit hydrological cycles to investigate important physical processes involving "monsoon-like" circulations, based on the assumption that actual monsoons can be simplified as twodimensional thermally-direct circulations. First, we examine the response of moist zonally-symmetric atmospheres to specified subtropical surfac...
متن کاملSensitivity of South American summer rainfall to tropical Pacific Ocean SST anomalies
[1] A suite of idealised ensemble experiments are used to investigate the sensitivity of the Southern Hemisphere atmospheric circulation to the location of SST anomalies over the tropical Pacific Ocean. Of particular interest is the response of South American rainfall during austral summer. The experiments reveal an approximately opposite response in rainfall over South America when the tropica...
متن کاملContributions of Indian Ocean Sea Surface Temperatures to Enhanced East African Rainfall
Links between extreme wet conditions over East Africa and Indian Ocean sea surface temperatures (SST) are investigated during the core of the so-called short rain season in October–November. During periods of enhanced East African rainfall, Indian Ocean SST anomalies reminiscent of a tropical Indian Ocean dipole (IOD) event are observed. Ensemble simulations with an atmospheric general circulat...
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تاریخ انتشار 2011