1954～2009年桓仁地区气候变化特征分析

Analysis on the Climate Change Characteristics of Huanren County from 1954 to 2009

根据桓仁地区1954~2009年的气温及降水资料,分析了桓仁地区的气候变化特征,得出近56年来桓仁地区年平均气温呈上升趋势,平均气温倾向率为0.29℃/10 a,四季气温也呈上升趋势,冬季变暖尤为明显,倾向率为0.71℃/10 a;年降水量呈下降趋势,其倾向率为-26.83 mm/10 a,夏季降水量减少较为明显（-12.17 mm/10 a）,秋季次之（-10.22 mm/10 a）,冬季降水量略显增多,其倾向率为0.34 mm/10 a。以1987年为界,可将桓仁地区气候分为2个阶段：1954~1987年为相对冷期,1988~2009年为相对暖期。

According to temperature and precipitation data from the year of 1954 to 2009 in the area of Hengren,the characteristics of the climate change in that area were analyzed.At last,it can be concluded that the average temperature had an upward trend in the area of Huanren in resent 56 years,the tendency ratio of average temperature was 0.29 ℃/10 a.Besides,seasonal temperatures were also on the rise,particular evidence was the winter warming,whose tendency ratio was 0.71 ℃/10 a.The annual precipitation had a downward trend,its tendency ratio was-26.83 mm/10 a.It was obvious that there was less precipitation in summer（-12.17 mm/10 a）,followed by autumn（-10.22 mm/10 a）,and the precipitation increased slightly in winter,which tendency ratio was 0.34 mm/10 a.Making the year of 1987 as a boundary,the climate among 56 years in Hengren can be divided into two stages：from 1954 to 1987 was relatively cold climate in the period,from 1988 to 2009 was relatively warm climate in the period.