期刊
JOURNAL OF CLIMATE
卷 26, 期 21, 页码 8392-8405出版社
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI-D-12-00851.1
关键词
Atmosphere-ocean interaction; Atmospheric circulation; El Nino; Rainfall
资金
- National Nature Science Foundation of China [41005049]
- National Basic Research Program 973 [2012CB417403]
- National Science Foundation [ATM 1034798]
- NOAA [NA10OAR4310200]
- DOE [DESC0005110]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
A severe drought struck southwest China during autumn 2009, which had a huge impact on productivity and the lives of the affected population. A nonconventional El Nino, the so-called warm pool (WP) El Nino, was supposed to be a principal factor of this strong autumn drought. In sharp contrast to a conventional El Nino, in the 2009 WP El Nino year the maximum sea surface temperature (SST) anomalies are confined to the central equatorial Pacific Ocean. Moreover, this WP El Nino was characterized by the relatively farther westward location and the strongest intensity among the WP El Nino events in the past 60 years. Observations and modeling studies both indicate that the rainfall deficits over southwest China are significantly influenced by the combined effects of the location and intensity of the WP El Nino. That is, the drought over southwest China tends to be more severe when the warming SST anomalies associated with the WP El Nino are located farther westward and are stronger. Therefore, the strong autumn drought over southwest China in 2009 can be largely attributed to the concurrent distinctive WP El Nino, which generates a strongly anomalous cyclone over the west North Pacific and leads to a serious reduction in rainfall over southwest China. The influence of the Indian Ocean warming on autumn rainfall over southwest China was also examined but seems to have little contribution to this drought.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据