近50年东北地区极端温度变化趋势  

Change trend of extreme temperature in Northeast China for the past 50 years

作　　者：严晓瑜[1,2] 赵春雨[2] 王颖[2] 何勇[3] 

机构地区：[1]宁夏气象服务中心,银川750000 [2]沈阳区域气候中心,沈阳110016 [3]中国气象局科技与气候变化司,北京100081

出　　处：《干旱区资源与环境》2012年第1期81-87,共7页Journal of Arid Land Resources and Environment

基　　金：中国气象局2010年气候变化专项(东北区域气候变化评估报告);国家科技支撑计划课题(2007BAC29B02);林业公益性行业专项中国森林对气候变化的响应与林业适应对策研究(200804001)资助

摘　　要：采用东北地区129个气象站1961-2009年的逐日最高、最低气温资料,对东北地区极端最高(低)气温及极端高(低)温日数的变化趋势进行分析。结果表明:东北大部分地区年极端最高气温和年极端最低气温均呈升高趋势,且后者比前者显著,气候倾向率分别为0.9℃/10a和0.1℃/10a;除中部部分地区外,东北地区年极端高温日数随时间变化呈增多趋势,平均每10a增加0.8天;年极端低温日数则主要以减少趋势为主,速率为4.7天/10a。近50年中,东北年极端最高气温和年极端高温日数均无显著突变点,年极端最低气温和年极端低温日数都在1982年发生显著突变。The variation of extreme maximum（minimum） temperature and extreme high（low） temperature days were analyzed based on a dataset of daily highest and lowest temperature from 129 weather stations in Northeast China during 1961-2009.Results showed that annual extreme maximum temperature and annual extreme minimum temperature showed increasing trend in most parts of Northeast China,and the latter was more significant than the former,climate tendency rate respectively were 0.9℃/10a and 0.1℃/10a.The annual of extreme high temperature days revealed an increasing trend in Northeast China except some middle area,and it increased 0.8 days for average 10a.The annual number of extreme low temperature days mainly decreased with a rate of 4.7 days per 10a.In the past 49 years,there was no significant abrupt change point for both extreme maximum temperature and extreme high temperature days,and there was one point of discontinuity for both extreme minimum temperature and extreme low temperature days in 1982.

关 键 词：东北地区 极端最高气温 极端最低气温 极端高温日数 极端低温日数 

分 类 号：P423[天文地球—大气科学及气象学]