青海高原近44年来气候变化的事实及其特征  

Study on Climate Change Facts and Their Characteristics in the Qinghai Plateau in Recent 44 Years

作　　者：汪青春[1] 秦宁生[1] 唐红玉[1] 陈芳[1] 祁如英[1] 

机构地区：[1]青海省气候中心,青海西宁810001

出　　处：《干旱区研究》2007年第2期234-239,共6页Arid Zone Research

基　　金：国家自然科学基金项目(40465002)

摘　　要：利用青海省26个代表站1961-2004年逐月气温、降水量资料,给出了加权平均的气温、降水量标准序列,分析了青海近44年来气温、降水量变化特征。结果表明:青海气温变化趋势与同期全国气温变化趋势基本一致,气候存在着变暖的总趋势,年平均增温率为0.36℃/10 a,气候明显变暖的地区主要在北部,气候变暖主要是夜间气温明显上升所致,变暖的季节主要是冬季,青海高原气温变化的位相超前于全国气温的变化;青海高原降水量变化趋势的空间分布不一致,高原降水日数在减少,但降水强度在增大。Based on the data of monthly air temperature and precipitation at 26 representative meteorological stations in the Qinghai Plateau during the period of 1961 - 2004, in this paper the standardized series of weighted average air temperature and precipitation are carried out, and the change characteristics of air temperature and precipitation in the Qinghai Plateau in recent 44 years are analyzed. The results show that the change trend of air temperature in the Qinghai Plateau accords basically with that all over the country, the decade temperature increase in the Qinghai Plateau is 0.36℃, the temperature increase is the most significant in winter, then in autumn, and it is not so significant in spring and summer. The temperature increase in autumn and winter has become assuasive since the 1980s, but that in spring and autumn has become more significant since the 1990s. Therefore, the general warming trend is significant, especially in the west Qinghai Plateau. The climatic warming is mainly caused by the temperature increase at night and in winter. The period of air temperature change in the Qinghai Plateau is earlier than that all over the country. There is no significant change in precipitation in the Qinghai Plateau. The spatial distribution of precipitation change in the Qinghai Plateau is inconsistent, that is the days of occurring precipitation decreases, but the precipitation intensity increases. .

关 键 词：气候变化 气温 降水量 青海 

分 类 号：P467[天文地球—大气科学及气象学]