河北省近四十年(1965-2005)气温和降水变化特征分析

根据1965-2005年河北省85个地面气象站的气温和降水资料,利用线性回归和M-K检验方法,分析了河北省近41年的气温和降水变化特征。结果表明:河北省年平均温度、平均最高温度和平均最低温度均表现出不同程度的升高趋势,其中最低温度升温倾向率最大。并在90年代初的增温过程是一次突变。四个季节的升温倾向率中冬季最大,温度升高最快,其次是春季,秋季比春季略低,夏季的最低。平均气温和最高气温增加明显的地区集中在北部和东部地区,最低气温增温分布在全省大部地区。降水虽然在90年代后期经历了一次较大幅度的下降过程,但总体上其下降的趋势并不明显,基本处于稳中有降,但没有通过0.05信度的显著性检验。空间上,降水变化主要集中在东部和沿海地区。汛期降水量变化情况与年降水变化基本一致,干旱期的降水则表现出微弱的上升趋势。

An analysis on variation characteristics of temperature and precipitation in Hebei Province during 1965-2005

Based on the 85 weather stations' data,the variation characteristics of temperature and precipitation in Hebei Province during 1965-2005 were analyzed by using liner regression and M-K checking methods.The results showed that the annual mean temperature,minimum and maximum temperature were increased with different extents,and the minimum temperature enhanced much more.It was a jump for temperature increase in the beginning of 1990S.Of the four seasons,temperature raised the most in winter,and the spring was...