河北省近50年0℃界限温度积温变化特征分析

本文利用京、津、冀区域内建站至2000年70个气象观测站点系统的气象观测资料,通过对河北省日平均气温稳定通过0℃的初日、终日、初终间日数、积温的空间变化、年际变化、年代际变化进行了分析。结果发现,全省及各区域日平均气温稳定通过0℃的积温变化均呈增加的趋势,全省范围内积温平均每10年增加了45℃。其中,增加最多的是太行山区,平均每十年增加了93.0℃;各区域的初终间日数变化都呈增加的趋势。初日呈提前的趋势,初日在全省范围每十年提前了2.2天,终日呈推迟的趋势。

Analysis on the Changes of the Accumulated Temperature on 0℃ Limit in Recent 50 Years in Hebei Province

Through the climate data got from the 70 observation stations in Beijing,Tianjin,and Hebhei region,the research made analysis on the changes of the first and last day and theinterval of them,with the daily temperature above 0℃stably,the change of the accumulated temperature indifferent space and also in different years and decades.It was found that the accumulated temperature of the whole province and in different region rising up about 45℃every decade.The most distinct region is in Taihang mountain area rising about 93℃per decade averagely.The interval days between the first and the last day above 0℃became longer and the first day moved earlier.The first day in the whole province was moving up earlier about 2.2 days every decade.The last day came later.