黑龙江省冬半年寒潮变化的气候特征

使用黑龙江省信息中心整编的62个站点1961年1月1日-2010年2月28日日平均气温、日最低气温等气象要素，着重分析了黑龙江省冬半年寒潮频次的时空变化特征。结果表明，过去的近半个世纪，黑龙江省冬半年寒潮活动频次总的趋势是减少的，存在明显的年际和年代际变化，而且不同地形区寒潮频次也有明显差异，对所有台站进行Mann—Kendall检验，没有突变现象。使用GIS对黑龙江省不同的地形发生的寒潮频次进行分析，发现山区发生寒潮的频次比平原地带明显多。

Climatic characteristics of the cold wave happened in the winter half year in Heilongjiang province

The temporal and spacial characteristics of the cold wave occurred in winter half year was studied in detail with the data of daily mean temperature and daily minimum temperature of 62 observation stations from 1 January 1961 to 28 February 2010 which is edited by Information Center of Heilongjiang Province. The results show that the frequency of cold wave decreases within past half century and has apparent inter-annual and interdecadal variation, besides that, the cold waves in different terrain are significantly different. All of the data from 62 observation stations is checked with the Mann-Kendall method and no mutation is found. Using the GIS to analyze the frequency of cold wave happened in different terrain, it found that cold waves occurred in mountain areas is more than in plain areas.