全球变化对宁夏近40 a极端气温变化的影响

 对全球气候变暖背景下宁夏气候变化基本事实,利用近40多年来宁夏基本气象资料,对年平均气温、极端气温的变化进行了研究。结果表明,近40多年宁夏年平均气温呈连续上升趋势,1986年之后增温速率加快,增温幅度高于全国平均值;年极端最高气温、极端最低气温均在波动中持续上升,年极端最低气温上升幅度明显超过年极端最高气温;各季极端最高、极端最低气温呈非对称性变化,秋季各地极端最高气温增温幅度超过极端最低气温,但春夏冬三季极端最低气温增温远比极端最高气温明显,该特点在夏季表现得更突出;各月极端最高气温、极端最低气温均呈升温趋势。

Influence of Global Warming to Variation of Extreme Temperature of Ningxia in Recent 40 Years

Climate change in Ningxia on background of global warming was analyzed based on the meteorological data in recent 40 years.The variation of annual mean temperature and extreme temperature were studied.Results show that: ①The air temperature of Ningxia increased continuously in recent 40 years, especially quickened after 1986 and with a higher warming extent than the national average.②The extreme high and low annual temperature continuously increased in fluctuation, and the increasing extent of annual extreme low temperature was obviously higher than that of the annual extreme high temperature.③The variation of seasonal extreme high and low temperature was asymmetric, the increasing extent of extreme high temperature was higher than that of the extreme low temperature in autumn, but it was inverse in spring, summer and winter, especially in summer.④The monthly extreme high and low temperature increased.