摘要
本文利用1961-2010年东北地区90个气象站的气象数据,分析了东北地区气温年较差的时空变化特征。研究表明：近50 a来最热月与最冷月均温呈明显的上升趋势,气温倾向率分别为0.19℃/10 a和0.46℃/10 a,但升温的幅度存在明显区域差异。近50 a来气温年较差总体呈不明显的下降趋势,气候倾向率为-0.27℃/10 a。大兴安岭为气温年较差变化趋势和幅度空间分异的界线。东北地区气温年较差存在3-5年和12-14年的变化周期。1985-1986年为其突变期。气温年较差与大西洋欧洲区极涡面积指数呈显著的正相关,与东亚槽的位置呈显著的负相关。
Based on the recorded data of 90 meteorological stations Northeast China during 1961- 2010,we analyzed the spatio- temporal variations of annual temperature range（ ATR）. The results showed that： the mean temperature of the warmest month and the coldest month shown a clear increasing trend with 0. 19 ℃ /10 a and 0. 46 ℃/10 a over Northeast China in the last 50 years,respectively. The positive amplitude showed significant difference. The trend in ATR showed a non- significant decreasing from 1961 to 2010,with the value of- 0. 27 ℃ /10 a. As to the trend and amplitude of ATR,Da Hinggan Mountains was the dividing line in the spatial variation of ATR over Northeast China in the last 50 years. The ATR had the period of oscillation of 3 - 5 years,12 - 14 years. In the last 50 years,the abrupt change period of ATR was during 1985- 1986. The ATR had a significant positive correlation with the Atlantic- European Polar Vortex Area Index（ AEPVAI） and a significant negative correlation with the East Asian Trough Position Index（ EATPI） over NEC.
出处
《长春师范大学学报》
2016年第8期74-80,共7页
Journal of Changchun Normal University
基金
吉林省科技厅自然科学基金项目"吉林省西部湿地空间格局图谱与演变驱动机制研究"(20130101097JC)
关键词
气温年较差
气温倾向率
趋势分析
东北地区
annual temperature range
temperature tendency rate
trend analysis
Northeast China
