SpatialTemporal Characteristics of Midsummer Drought Variation in Chongqing
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Abstract:
On the basis of the daily precipitation data of 34 stations in Chongqing from 1961 to 2008, the methods of principal component analysis and rotated principal component analysis are used to analyze the spatial and temporal characteristics of midsummer droughts in Chongqing. The main results show that the midsummer droughts occur frequently in the central and western parts of Chongqing. The first loading vector field of midsummer droughts in Chongqing indicates that the midsummer drought variation has a good consistency. The midsummer drought abnormal region can be divided into four subregions: the western, northeastern, southeastern and middle regions. The midsummer droughts over the western region were the strongest in the 1960s and 1970s. The midsummer droughts over the northeastern region were the strongest in the 1990s. The midsummer droughts over the central region were the strongest in the 1970s. The variation tendency of midsummer droughts over the southeastern region was not obvious.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.