干旱区生态环境知识资源中心(Arid): 河西地区绿洲NDVI的演变特征及与气候因子的关系分析

Arid

	河西地区绿洲NDVI的演变特征及与气候因子的关系分析
其他题名	Variation characteristics of oasis vegetation in Central Hexi in the late 20th Century
	李振朝 1; 韦志刚 1; 吕世华1 ; 姜洪权 2
ISSN	1000-6060
出版年	2008
卷号	31 期号:1 页码:82-87
中文摘要	选取NOAA和NASA Pmhiinder AVHRR陆面资料中的19822000年中国区域的NDVI逐月数据，进行河西地区植被覆盖状况分析，探讨河西绿洲植被的演变规律，分析研究河西地区NDVI的年际变化特征，发现近20年来额济纳绿洲是明显退化的；临泽和民勤是明显的正值，金塔绿洲也为正值，但值较小。从时间段上来说，19821984年，NDVI处于相对高值段，各绿洲有所发展；19851989年是NDW的低值段，绿洲退化；19901995是NDVI的高值段，绿洲的发展很明显；1996年开始，NDVI有所下降，绿洲有所退化。对1982-2000年河西绿洲的降水、气温、地温、及各内陆河的径流资料与河西绿洲中部临泽、民勤、金塔、额济纳旗四个绿洲的NDVI作了相关分析，研究了河西中部地区绿洲发展和气候变化及水资源的关系，发现河西中部地区绿洲NDVI与前期3、4月份的气温、降水、内陆河径流的关系较好，与5月份地气温差的相关关系较好。
英文摘要	Basing on NDVI monthly data during 1982-2000 in China from NOAA, NASA, Pathfinder and AVHRR land surface data, the vegetation coverage condition is analyzed and the variation laws of oasis vegetation are inquired in this paper. Taking NDVI during the last-ten day of June for example, the annum variation characteristics of NDVI in Hexi area is studied; it can be found that oasis in Ejina degenerates obviously, oases in Linze and Min-qin develop obviously and oasis in Jinta develops to some extent. From the point of temporal variation, NDVlwas in relatively high stage from 1982 to 1984 and every oasis developed more or less, NDVI was low between 1985 and 1989 and the oasis degenerated. NDVlwas in high section between 1990 and 1995, and oasis developed obviously. While since 1996, NDVI has decreased and oasis has degenerated. The corresponding precipitation, air temperature, ground temperature and runoff data in each inland river are analyzed withregard to NDVI of the four oases in central Hexi, Linze, Minqin, Jinta and Ejina; the relationships of oasis development to climatic variation and water resource in central Hexi are studied. It can be found that oasis NDVI in central Hexi possesses a better relationship with the air temperature, precipitation, inland runoff in early March and April. And the correlative relationship between oasis NDVI and difference in temperature of air and ground is also significant.
中文关键词	河西中部 ; 气候因子 ; 演变特征
英文关键词	NDVI central Hexi NDVI climatic factor variation character
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:3205720
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222265
作者单位	1.中国科学院寒区旱区环境与工程研究所, 中国科学院西部气候环境与灾害实验室, 兰州, 甘肃 730000, 中国; 2.北京军区空军气象中心, 北京 100061, 中国
推荐引用方式 GB/T 7714	李振朝,韦志刚,吕世华,等. 河西地区绿洲NDVI的演变特征及与气候因子的关系分析[J]. 中国科学院西北生态环境资源研究院,2008,31(1):82-87.
APA	李振朝,韦志刚,吕世华,&姜洪权.(2008).河西地区绿洲NDVI的演变特征及与气候因子的关系分析.,31(1),82-87.
MLA	李振朝,et al."河西地区绿洲NDVI的演变特征及与气候因子的关系分析".31.1(2008):82-87.