1957—2011年牙克石市低温气候特征分析

Analysis on climatic characteristics of low temperature from 1957 to 2011 Years in Yakeshi City

文章主要通过利用牙克石市1957—2011年(历年1—3、11—12月)的低温气候资料进行分析,找出牙克石市近55a来的低温气候变化特点。得出了低温天数的年、月变化以及与极端最低气温的对应关系,牙克石55a来共计出现低温天气673d,低温日数年际变化大,最长为47d,最少为1d,低温出现的高峰期在历年的1月份,低温强度最大值也在1月份。55a中≤-37℃低温最长连续日数长达17d,其次是13d。文章还利用Mann-kendall检验方法对低温年际变化进行了突变分析,分析发现在1984年发生了明显的突变,突变呈减少的趋势。

This paper mainly analyzese the low temperature climate data from 1957 to 2011（January-March, November- December） in Yakeshi city, and finds climatic variation characteristics of low temperature nearly 55 years. It finds the variation between annual and monthly variation of low temperature days and the relationship with extremely minimum temperature, and the low temperature weather appears 673 days among 55 years. Inter annual variability of Low temperature days is great, such as maximum is 47 days and minimum is 1 day. Low temperature appears mostly in January, the same as the low temperature intensity’s maximum. Longest consecu tive days ≤-37℃ is 17 days among the 55 years, followed by 13 days. By means of Mann-kendall test method, the paper analyzese the low temperature interannual variation, and it shows that mutation decreases and the obvi ous mutation is in 1984.