ANALYSIS OF THE PRECIPITATION CHANGE CHARACTER OVER CENTRAL CHINA FROM 1961 TO 2010
ANALYSIS OF THE PRECIPITATION CHANGE CHARACTER OVER CENTRAL CHINA FROM 1961 TO 2010
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发表时间：
2013
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通讯作者：
Ren Yong-jia
中科院分区：
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作者：
Ren Yong-jia
收集了1961年至2010年中国中部239个气象站，以均一化检验合格的233个站为分析对象，对中国中部降水特征进行了研究。结果表明，中国中部降水趋势不明显，但年代际变化显著。20世纪60年代降水接近常值，90年代偏多，70~80年代偏少，21世纪初偏少。纬向分布自南向北逐渐减少，但空间分布不均匀。降水日数以每10年3.4天减少趋势明显。1989年后区域性降水明显增多，2006年后明显减少。春、秋季降水总体呈减少趋势，分别为-5.4 mm/10a和-12.2 mm/10a，而夏、冬季降水总体以15.6 mm/10a和6.3 mm/10a的速率增加，四季降水日数变化速率分别为-1.4、0.2、-2.1和-0.1d/10a。
Collected 239meteorology stations in Central China from 1961 to 2010,the characteristics of the precipitation in Central China were investigated based on 233stations which passed the homogenization test as analysis object.The results showed that the precipitation trend was almost not obvious,but notable in decadal change.The precipitation in 1960swas close to normal value,higher in 1990s and less from 1970s to 1980s and in early 21st century.The zonal distribution,which was gradually decreasing from southern to northern,was much more significant,yet not uniform in spatial distribution.The decreasing trend of rain days was eminent at 3.4days per 10years.The regional rainfalls increased much obviously after 1989 and reduced after 2006,which possessed an oscillation period of 2years.The rain days reduced significantly after1986.The precipitation trends during spring and autumn were completely reducing,which retained respectively the change rate of-5.4and-12.2mm per 10years.Yet the summer and winter rainfall totally increased with the rate of 15.6and 6.3mm per 10years.And the change rates of rain days during four seasons were separately-1.4,0.2,-2.1and-0.1days per decade.