天津市北辰区冬季气候特征研究

Climate Features of Winer in Beichen District,Tianjin City

采用趋势分析、相关性分析和距平测算方法，根据1958～2010年天津市北辰区1、2和12月平均最低气温和极端最低气温气象观测资料，结合北辰区建站以来的最低气温年际变化，分析天津市北辰区气候特征及其变化情况。研究表明，12、1和2月的极端最低气温变化均呈上升趋势，倾向率分别为0．473、0．491和0．572℃／10a；月平均最低气温与月极端最低气温表现较好的同步性，1月份相关性最高：月极端最低气温存在波动性，其中，2月距平波动较大，1月距平波动较小。

Aecnrding to the meleorolngical observation data of average minimum temperature and extreme minimnm Imnperaturc the in Beichcn Dislrict, Tianjin, the paper adopl trend analysis, relevance analysis and departure method to analyze climate features and ehanges of Beiehen Districl, Tianjin in January, February and December during1958 -2010. To combine annual changes of minimum tcmperal,rc since the weather station establishmenl in Beichen District, Tianjin, we come to the conclusinn that： the changes of extreme minimam temperature all show an upward treml in December, January and February. Of which, rising trend rate are 0. 473, 0. 491 and 0. 572℃/10a; The mean minimum temperature aml monthly extreme minimum temperature performs a better synehrnnization; January has the highest correlation; monthly extreme minimum temperature has volatility, departure of Fcbntary has greater wolatility, departure of January amnnaly has smaller volatility.