内蒙古大兴安岭东南部地区霜冻特征分析

Features Analysis of Frost in the Southeastern Region of the Daxinganling Mountains in Inner Mongolia

根据大兴安岭东南部3个地面气象站1961～2008年霜冻气候资料及日最低气温资料,对东南部农业区的霜冻气候变化特征以及对主要作物的影响进行研究。结果表明,1961～2008年,大兴安岭东南部地区早(秋)霜冻初日推迟,晚(春)霜冻终日提前,无霜冻期延长。农业区霜冻初日推迟、终日提前的趋势最为明显。春霜冻期低温强度变化趋势较秋霜冻期明显。

According to the climate data frost and the lowest temperature of three ground weather stations in the southeastern of Daxinganling mountains southeastern from 1961-2008,the characteristics of frost climate change and effect on the chief crop were researched in the southeast farming region.The results showed：In 48 years,in the southeastern region of Daxinganling Mountains,the first day of early（autumn）frost was delayed,the late（spring）frost was brought forward and the frost free period was prolonged.This trend is most obvious in the farming region.The change trends of low temperature intensity in spring than in the autumn frost.