The result shows that effect of high SST in equator east Pacific and of the blocking situation in the Baikal Lake and of cold winter in SW Qinghai Xizang Plateau lead to drought occuring in Gansu.

• 结果表明：赤道东太平洋海温异常偏高，贝加尔湖500hPa正高度距平持续维持以及青藏高原冬季偏冷的共同作用是造成甘肃省特大干旱事件发生的原因；