马柱国,符淙斌. 2001. 中国北方干旱区地表湿润状况的趋势分析[J]. 气象学报, 59(6):737-746, doi:10.11676/qxxb2001.077
中国北方干旱区地表湿润状况的趋势分析
TREND OF SURFACE HUMID INDEX IN THE ARID AREA OF NORTHREN CHINA
投稿时间:2000-03-24  修订日期:2000-12-11
DOI:10.11676/qxxb2001.077
中文关键词:  干旱  地表湿润指数  气候变化
英文关键词:Drought,Surface humid index,Climatic change
基金项目:国家重点基础研究专项经费资助项目(G19990433400);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(KZCX1-10-07)"
作者单位
马柱国 中国科学院大气物理研究所全球变化东亚研究中心, 北京 100029 
符淙斌 中国科学院大气物理研究所全球变化东亚研究中心, 北京 100029 
摘要点击次数: 3218
全文下载次数: 4191
中文摘要:
      利用1951~1997年中国160站月降水和平均气温资料,通过计算的地表湿润指数Hi=P/Pe(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。
英文摘要:
      Based on the 160 observ ational station's dat a of monthly precipitation and mean monthly temperature over China from 1951 to 1997,by use of the surface humid index computed from the data,Hi=P/Pe(P is the monthly total of precipitation,Pe the potential evaporation from air temperature),the interannual variation,decadal variation and the seaso nal differences of the sur face humid index,precipitation and temperature over two ty pical drought regions,the northwestern and northern China,have been analyzed.The geogr aphical 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 north western China,the form ershowed the wetting trend,and the latter drying trend.Also,the results show ed that the drying trend of northern China generally occurred in summer and autumn,and that the wetting trend occurred in various seasons in northw estern China except for autumn of the east region of nor thwestern China,and summer of westregion of northwestern China.
HTML   查看全文   查看/发表评论  下载PDF阅读器