科尔沁沙地乌兰敖都地区最高和最低气温的变化趋势  

Variation Trends of Maximal and Minimal Air Temperature at Wulanaodu Region,Horqin Steppe

作　　者：王红梅[1] 骆永明[1] 蒋德明[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《中国农业气象》2007年第2期124-127,共4页Chinese Journal of Agrometeorology

基　　金：国家科技攻关子课题"温带半干旱典型沙区水资源承载力与植被优化配置技术研究(2005BA517A02-1)";辽宁省科学技术基金博士启动基金"人工固沙植被水分平衡与土壤水分植被承载力研究"(20051009)

摘　　要：利用线性趋势分析方法初步分析了近25 a(1981-2005年)乌兰敖都地区逐月平均气温、平均最高气温、平均最低气温、02时平均气温、14时平均气温5个气温序列的变化趋势和特征。结果表明:近25 a来乌兰敖都地区的5个气温序列均呈非连续的增加趋势;平均最高气温线性增加率最高(0.78℃/10 a),是平均最低气温线性增加率(0.14℃/10 a)的5.6倍;平均最高气温、平均最低气温各季均为升高趋势;春季增温最明显,秋、夏、冬季的增温程度依次减小;白天气温增加幅度高于夜间,表现出明显的不对称性。An analysis on variation trends and annual variation characteristics of monthly average air temperature, average maximal air temperature, average minimal air temperature, average air temperature at 2 A.M. and average air temperature at 2 P.M. during 1981-2005 in Wulanaodu Region was carried out. The results showed that the five lists presented a discontinuous increased trend of temperature in past 25 years. The linear increasing rate of maximal air temperature （0.78℃/10a） is maximal, and is 5.6-fold of that of minimal air temperature （0.14℃/ 10a）. The average maximal air temperature and minimal air temperature presented an increased trend in all seasons. The increasing trend of air temperature in spring was most obvious, and the trend in autumn, summer and winter were gradually reduced. The increased range of air temperature, presenting obvious unsymmetrical variation, was higher in daytime than that at night.

关 键 词：科尔沁沙地 最高气温 最低气温 非对称变化 

分 类 号：S16[农业科学—农业气象学]