近几十年黄河源区气候与植被变化及相关分析  

Changes and Relation Analyses of Climate and Vegetation in the Source Region of Yellow River in Recent Several Decade Years

作　　者：柳媛普[1] 吕世华[1] 李锁锁[1] 尚伦宇[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃兰州730000

出　　处：《高原气象》2007年第5期1045-1051,共7页Plateau Meteorology

基　　金：国家自然科学基金重点项目(40575032);国家重点基础研究发展计划项目(2005CB422003)共同资助

摘　　要：通过对黄河源区气温、降水量、NDVI指数变化以及NDVI指数与气温、降水量的相关性进行分析,结果表明:黄河源区气温近50年呈升高趋势;源区近34年年降水量呈减少趋势,20世纪80年代源区降水量较多,比较湿润。近20年黄河源区及源区东北部植被覆盖较差,且不容易保持,达日及源区东南部植被覆盖相对较好,且容易保持;源区植被覆盖与气温、降水量均呈正相关关系,降水量对植被覆盖的影响比气温的影响大。Analyzing the variations and correlations of temperature,precipitation and NDVI index in the source region of Yellow River.Some results are found,the temperature was ascend significance in the recent 50 years;the precipitation trend was descend in the recent 34 years,the precipitation was more in 1980＇s,it was much humid in source region of Yellow River;the vegetation was covered badly in the source region of Yellow River and its notheast,it was not easily keeping;but it was covered well in Dari and the southeast of the source region of Yellow River and it was easily keeping in the recent 20 years,the vegetation was positive correlated to temperature and precipitation and the precipitation took more effect on vegetation than temperature.

关 键 词：黄河源区 气温 降水量 归一化植被指数(NDVI) 

分 类 号：P532[天文地球—古生物学与地层学]