首页 | 官方网站   微博 | 高级检索  
     

中国北方干旱区地表湿润状况的趋势分析
引用本文:马柱国,符淙斌.中国北方干旱区地表湿润状况的趋势分析[J].气象学报,2001,59(6):737-746.
作者姓名:马柱国  符淙斌
作者单位:中国科学院大气物理研究所全球变化东亚研究中心,
基金项目:国家重点基础研究专项经费资助项目 ( G1 9990 4 334 0 0 ),中国科学院创新重大项目“西部生态环境变化规律与水土资源可持续利用研究 ( KZCX1 -1 0 -0 7)”
摘    要:利用 1 95 1~ 1 997年中国 1 6 0站月降水和平均气温资料 ,通过计算的地表湿润指数 Hi =PPe(P为观测的月降水总量 ,Pe为月最大潜在蒸发 ) ,对比分析了中国华北、西北两个典型干旱区区域平均地表湿润指数的年代年际变化特征及季节性差异 ,并讨论了它与降水和气温的联系。最后 ,给出了地表湿润指数年及各季节变化趋势的地理分布。研究表明 :西北西部和华北地区的年际及年代际变化趋势基本相反 ,前者地表为变湿趋势 ,后者为变干趋势。华北地区的干化趋势主要发生在夏秋季节 ,而西北除东部的秋季和西部的夏季外 ,其它季节均存在变湿趋势

关 键 词:干旱  地表湿润指数  气候变化
收稿时间:2000/3/24 0:00:00
修稿时间:2000年3月24日

TREND OF SURFACE HUMID INDEX IN THE ARID AREA OF NORTHREN CHINA
Ma Zhuguo and Fu Congbin.TREND OF SURFACE HUMID INDEX IN THE ARID AREA OF NORTHREN CHINA[J].Acta Meteorologica Sinica,2001,59(6):737-746.
Authors:Ma Zhuguo and Fu Congbin
Affiliation:START Regional Center for Temperate East Asia Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029;START Regional Center for Temperate East Asia Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029
Abstract:Based on the 160 observational station's data of monthly precipitation and mean monthly temperature over China from 1951 to 1997, by use of the surface humid index computed from the data, H i=PP e(P is the monthly total of precipitation, P e the potential evaporation from air temperature),the interannual variation, decadal variation and the seasonal differences of the surface humid index, precipitation and temperature over two typical drought regions, the northwestern and northern China, have been analyzed. The geographical distributions and trends of surface humid index have been given in the areas. The results indicated that the interannual and decadal variation of surface humid index over northren China is contrary to that of the west region of northwestern China, the former showed the wetting trend, and the latter drying trend. Also, the results showed that the drying trend of northern China generally occurred in summer and autumn, and that the wetting trend occurred in various seasons in northwestern China except for autumn of the east region of northwestern China, and summer of west region of northwestern China.
Keywords:Drought  Surface humid index  Climatic change  
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《气象学报》浏览原始摘要信息
点击此处可从《气象学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号