近52年来磴口地区气候变化分析

本文分析了磴口52年(1954-2005)逐月平均气温和降水量。结果表明:年平均气温逐年代递增,低温年发生在50至70年代,暖温年发生在80年代后,体现为"前凉后暖"的特点;年平均气温及各季平均气温均呈明显上升趋势,增长幅度依次为冬季>全年>春季>秋季>夏季。降水量年代际变化比较明显,60年代与90年代降水明显偏多,其它年代偏少,而且70年代是降水偏少的转折时期。年际间降水变化趋势不明显,丰水年与枯水年分别为36.5%和27.0%。降水的年际变幅夏季最大,秋季次之,冬季最小。降水主要集中在夏季,而且年降水的波动形态与夏季基本一致。

Climate Changes in Dekou County in Recent 52 Years

According to the data of temperature and precipitation in Dekou oasis in recent 52 years,the climate changes were analyzed.The results showed that the temperature increased decadally.But it was decreased from 1950s to 1970s and increased since 1980s.The seasonal and annual changes of temperature within several years showed a obvious tendency of increase,and the increase rate was the biggest in winter,followed by the whole year,autumn,spring,and the smallest was in summer.The precipitation was different in decades,and more in 1960s and 1990s,less in the 1970s.The variation of annal precipitation was not obvious.Abundant precipitation and lack precipitation proportion was 36.5% and 27.0% respectively.The rate of precipitation within several years was the biggest in summer,followed by autumn,and the smallest was in winter.Precipitation focused in summer mostly.The fluctuation of precipitation in summer was basically coincided with annual precipitation.