Trend of extreme precipitation events over China in last 40 years
Zhang Da-Quan(章大全)a)b), Feng Guo-Lin(封国林)b)c)†, and Hu Jing-Guo(胡经国)a)
a College of Physics Science and Technology, Yangzhou University, Yangzhou 225009, China; b Laboratory for Climate Studies of China Meteorological Administration, National Climate Center, Beijing 100081, China; c The Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Abstract Using the daily precipitation data of 740 stations in China from 1960 to 2000, the analysis on the variations and distributions of the frequency and the percentage of extreme precipitation to the annual rainfall have been performed in this paper. Results indicate that the percentage of heavy rains (above 25mm/day) in the annual rainfall has increased, while on average the day number of heavy rains has slightly reduced during the past 40 years. In the end of 1970s and the beginning of 1980s, both the number of days with extreme precipitation and the percentage of extreme precipitation abruptly changed over China, especially in the northern China. By moving t test, the abrupt change year of extreme precipitation for each station and its spatial distribution over the whole country are also obtained. The abrupt change years concentrated in 1978--1982 for most regions of northern China while occurred at various stations in southern China in greatly different/diverse years. Besides the abrupt change years of extreme precipitation at part stations of Northwest China happened about 5 years later in comparison with that of the country's average.
Received: 21 April 2007
Revised: 08 August 2007
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 40675044), the State
Key Development Program for Basic Research of China (Grant No
2006CB400503), and the Laboratory for Climate Studies of China
Meteorological Administration Climate Research Program (Grant No
LCS-2006-04).
Cite this article:
Zhang Da-Quan(章大全), Feng Guo-Lin(封国林), and Hu Jing-Guo(胡经国) Trend of extreme precipitation events over China in last 40 years 2008 Chin. Phys. B 17 736
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