近30a牡丹江市寒潮的时空分布特征及其变化分析

The temporal and spatial distribution characteristics analysis of the cold wave in Mudanjiang during the past 30 years

本文利用牡丹江市7个观测站1981—2010年的逐日平均气温和最低气温资料,根据牡丹江市地方寒潮标准,统计各个测站的历年寒潮发生次数;在GIS技术支持下,选取7个测站分析寒潮发生次数的时空变化规律。研究结果表明:牡丹江市30 a共发生寒潮149次,年代际间呈减少趋势;综合三季看,冬季最多,秋季次之,春季最少。绥芬河是寒潮高发区,东宁最少;全年、春季和冬季寒潮频次的区域分布自东向西递减,秋季寒潮呈现中心多四周少的空间分布。

According to the local cold wave standard of Mudanjiang,count the cold wave frequency with the daily mean temperature and minimum temperature data of 7 observation stations from 1981 to 2010. Under the support of GIS technology,select 7 stations to analyze the temporal and spatial changes of the cold wave frequency.The re- suits showed,there was 149 cold wave in Mudanjiang during the past 30 years,and the decadal variability de- crease. The frequency of cold wave occurrence is highest in winter,then in fall and the lowest in spring. Suifenhe is the highest cold wave incidence area and Dongning is the lowest. The regional distribution of cold wave occur- fence decrease from east to west in spring, winter and throughout the year.The spatial distribution present more cold wave in center than around in autumn.