Recent changes in the diurnal cycle of precipitation over the United States

被引:44
作者
Dai, A [1 ]
机构
[1] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
关键词
D O I
10.1029/1998GL900318
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Hourly precipitation data from 1963 to 1993 of the contiguous United States were analyzed for secular trends in the diurnal cycle of precipitation. During the period the winter daytime and nighttime precipitation frequencies and the diurnal amplitude of precipitation frequency increased by similar to 30-47% over the Southwest, while the winter precipitation frequencies and the diurnal amplitude of precipitation intensity decreased by similar amounts over the Northwest. During this period, summer afternoon precipitation frequency increased by similar to 30-60% in the Southwest and decreased by similar to 15-30% in the Southeast.
引用
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页码:341 / 344
页数:4
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