Distribution Characteristics of Spring Droughts Based on HighResolution Data in Ningxia
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Abstract:
Based on highresolution spatial and temporal data over Ningxia from 1961 to 2015, we analyzed the distribution characteristics of spring droughts by statistical methods. The results reveal that there were more droughts in spring happened in the central Ningxia than in the northern or southern parts, but the average intensity of droughts had contrary characteristics. The maximum spring drought intensity demonstrated obviously multipolar distribution characteristics. There occurred more frequently serious droughts in Wuzhong, Yinchua, and Zhongwei. The frequency of spring droughts in Ningxia increased basically year by year, but the average intensity decreased gradually, while interdecadal characteristics were more obvious. The spring drought intensity was relatively stable, and large scale droughts occurred more frequently in March and May. During early March, early May and late May, serious drought processes occurred more easily. The main reasons for spring droughts in Northwest China include the variation of the ridge of the continental high and 500 hPa atmospheric circulation.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.