银川平原气候变化特征分析

利用宁夏银川平原4个气象站1961-2006年气象观测资料,对季、年值时间序列进行气候变化分析,结果表明:银川平原近46a低层和高层年平均气温均呈增温趋势,低层比高层增温时间滞后,冬季增温幅度最大,低层各季增温均非常显著,高层春季、秋季、冬季增温显著;年平均最高和平均最低气温也均呈增温趋势,平均最高气温秋季、冬季增温显著,平均最低气温春季、夏季、冬季增温显著;年降水量呈减少的趋势,各季降水量增减变化不显著;年日照时数呈明显减少的趋势,冬季减少显著。

The Analysis on Climate Change Characteristics in Yinchuan Plain

By the use of seasonal and yearly mean temperature,mean temperature on 850hpa,mean maximum temperature,mean minimum temperature,precipitation and sunshine duration data of 5 meteorological stations in Ningxia Yinchuan plain from 1961 to 2006,the climate change in Yinchuan plain was analyzed and results showed that: Under the background of global warming,both seasonal and yearly temperature was rising in Yinchuan plain,and the mean minimum temperature the most obviously;The change trend in precipitation was not evident,but it increased a little in spring and winter;The increase trend of sunshine duration was little in spring,and the decrease trend of it in winter was the most obviously.