The relationship between Indian Ocean sea-surface temperature and east African rainfall
The relationship between Indian Ocean sea-surface temperature and east African rainfall
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DOI：
10.1098/rsta.2004.1474
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发表时间：
2005-01-15
期刊：
影响因子：
5
通讯作者：
Black, E
中科院分区：
文献类型：
--
作者：
Black, E
了解控制东非降雨的过程对于发展季节预报系统至关重要，因为季节预报系统可以减轻水灾和旱灾的影响。这项研究使用观测数据来揭示印度洋偶极子（IOD），厄尔尼诺南方涛动（ENSO）和东非多雨的秋季之间的关系。对海面温度数据的分析表明，东非的强降雨与太平洋和西印度洋的变暖以及东印度洋的冷却有关。这种模式的相似之处，它在IOD事件的发展意味着IOD和强大的东非降雨之间的联系。进一步的研究表明，观测到的东非降雨量和ENSO之间的遥相关是ENSO和IOD之间的联系的一种表现。
Knowledge of the processes that control East African rainfall is essential for the development of seasonal forecasting systems, which may mitigate the effects of flood and drought. This study uses observational data to unravel the relationship between the Indian Ocean Dipole (IOD), the El Nino Southern Oscillation (ENSO) and rainy autumns in East Africa. Analysis of sea-surface temperature data shows that strong East African rainfall is associated with warming in the Pacific and Western Indian Oceans and cooling in the Eastern Indian Ocean. The resemblance of this pattern to that which develops during IOD events implies a link between the IOD and strong East African rainfall. Further investigation suggests that the observed teleconnection between East African rainfall and ENSO is a manifestation of a link between ENSO and the IOD.