1958—2015年长白山气候变化特征分析

利用长白山的气象数据,分析长白山1958—2015年平均温度和降雨量的变化特征.结果表明:长白山年平均温度呈现上升趋势,线性增温率为0.392℃/10 a,四季和各月份的平均温度均呈现上升的趋势.其中,冬季的增温率最高,为0.569℃/10 a,其次是秋季和春季,夏季的增温率最低,为0.222℃/10 a;长白山年降雨量变化不明显,整体呈现微弱增加趋势,降雨量倾向率为2.28 mm/10 a.其中,四季的降水量呈现不同的趋势,春季、夏季和冬季的降雨量呈现增加的趋势,而秋季的降雨量呈现下降的趋势,降雨量倾向率为-3.9 mm/10 a.在过去的58 a,长白山总体气候呈现暖干化趋势.

Characteristics of Climate Change in Changbai Mountain from 1958 to 2015

Based on 1958—2015 monthly meteorological data,the characteristics of mean temperature and precipitation change in Changbai Mountain were analyzed. The results indicated that the annual mean temperature showed the increasing trend from 1958 to 2015,and increased by 0. 392℃/10 a. All of the seasonal and monthly temperatures showed increasing trends. Compared with each season,the rate of temperate in winter increased most quickly(0. 569℃/10 a),followed by autumn and spring,and summer increased most slowly(0. 222℃/10 a). The annual precipitation in Changbai Mountain displayed a slight increase,and increased by 2. 28 mm/10 a,but the precipitation variation was not obvious. The seasonal precipitation showed various trends. The spring precipitation,winter precipitation and summer precipitation showed increasing trend,but the autumn precipitation showed decreasing trend with a rate of -3. 9 mm/10 a. Above all,the climate trended to be warmer and dryer in the past 58 years.