青海高原近40 a降水变化特征及其对生态环境的影响

摘要/Abstract

摘要： 利用青海省1961-2002年26个代表站逐日雨量资料和高原东部地区10个站的降水自记资料,分析了近40 a来降水量、雨日、雨强的气候变化特征。结果表明:青海高原近40 a来年降水量无明显的变化,但夏半年降水量呈减少趋势,冬半年降水量呈明显的增多趋势；夏半年降水量和雨日虽在减少,但降水强度在增大；夏半年降水量的减少主要是降水日数的减少造成的,而冬半年降水量的增加是由于雨日增多和每个降水日平均雨量的增大所造成；随着气候变暖,夏、秋季降水明显偏少,出现暖干化的气候趋势。

关键词: 青海高原, 降水, 变化特征, 环境影响, 近40a

Abstract:

Based on the daily rainfall data of 26 stations in 1961-2002 and the precipitation data of 10 stations in eastern Qinghai province, the climatic variation characteristics of rainfall, rainy days and rain intensity were analyzed. The result showed that there was no obvious change in regional rainfall for that period, but the rainfall in summer season was decreasing and increasing in winter season. Although the rainfall and the rainy days in summer season were decreasing, the rain intensity was increasing. The reason for rainfall decreasing in summer season was mainly the decreasing of rainy days, and that for rainfall increasing in winter season was the increasing of rainy days and the daily mean rainfall in rainy day. With the global warming the rainfall of this region obviously decreases in summer and autumn, and the climatic is turning toward warm and dry.

Key words: Qinghai Plateau, precipitation, variation characteristics, environmental effect, recent 40 years

中图分类号:

P426.614

汪青春;秦宁生;张占峰;唐红玉;陈芳;祁如英. 青海高原近40 a降水变化特征及其对生态环境的影响[J]. 中国沙漠, 2007, 27(1): 153-158.

WANG Qing-chun;QIN Ning-sheng;ZHANG Zhan-feng;TANG Hong-yu;CHEN Fang;QI Ru-ying. Precipitation Change and Its Impact on Eco-environment of Qinghai Plateau for the Last 40 Years [J]. JOURNAL OF DESERT RESEARCH, 2007, 27(1): 153-158.

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