The Influences of Normals Change upon Climate Operation of China
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Abstract:
WMO suggests that period of normals expressing the anomaly of an element variable can be changed from the old period of 1961-1990 to a new period 1971-2000.Because of the different normals,the anomaly of an element,such as the temperature,precipitation,SST and geopotential height,will be changed.The winter temperature anomaly will be 0.5℃ below in the northern part of China.The summer rainfall anomaly will be more in the Yellow River valley,the North China and Northeast China,and will be less in the Northwest China and the south of Yangtze River.It is based on the different climate state in the two periods of 1960s and 1990s.