supported by Union Fund of the National Natural Science Foundation of China and Yunnan Province (Grant No. U0833602);Special Project of the China Meteorological Administration (Grant No. GYHY200906017);National Natural Science Foundation of China (Grant Nos. 40705026, 40805036 and 40905043);Basic Research Fund of the Chinese Academy of Meteorological Sciences (Grant No. 2010Z001);Science and Technology Program of Yunnan Province for the Development of Society (Grant No. 2009CA023)
Yunnan Province of China suffered a record-breaking drought that persisted from autumn 2009 into spring 2010. The present study examined the physical causes of this extreme drought event in terms of persistent anomali...