1975-2009年宁夏平罗县气候的变化特征

为探明宁夏平罗县气候变化特征,为区域农业生产应对气候变化提供理论依据,采用线性趋势分析法和距平法对宁夏平罗县1975—2009年的气温和降水资料进行分析研究。结果表明:近35年平罗县年平均气温总体呈上升趋势,其变化倾向率为0.079℃/a,且最高气温增温更突出;春季增暖最显著,冬季与夏季次之,秋季最小。平罗县年平均降水量在波动中略有减少,其变化倾向率为-0.388mm/a,并且降水集中于夏季;除夏季降水量减少外,其余各季略有增加,但增幅很小,年降水量的变化趋势基本与夏季一致。

Climatic Change Characteristics of Pingluo County from 1975 to 2009

In order to explore climate change characteristics in Pingluo County,so as to provide basis for regional agriculture production to adapt to climate changes,linear trend analysis and anomaly analysis were used to research emperature and rainfall data of Pingluo County from 1975 to 2009.The results showed that the annual mean temperature was significantly increased and its variability was 0.079℃/a in resent 35 years.The trend of increasing temperature was the most remarkable in spring and the year which annual mean temperature was maximum.Meanwhile the annual mean precipitation little decreased slightly and its variability was-0.388 mm/a,the same as the summer,but the precipitation in spring,autumn and winter increased slowly.The precipitation in summer was the largest and in winter was the smallest.The change trend of annual precipitation was consistent with that of summer.In a word,climatic changes showed distinct regional characteristics.