干旱区生态环境知识资源中心(Arid): 额尔齐斯河流域中亚段植被覆盖遥感动态监测

Arid

	额尔齐斯河流域中亚段植被覆盖遥感动态监测
其他题名	Dynamically monitoring of vegetation cover in 2000-2008 of Irtysh River Valley of Central Asia with remote sensing
	李宝明; 杨辽; 朱长明; 刘萍; 方晖
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2010
卷号	33 期号:2 页码:203-209
中文摘要	利用中亚北部额尔齐斯河流域2000-2008年的中分辨率成像光谱仪(Moderate Resolution Imaging Spectrometer,MODIS)数据,分析了额尔齐斯河中亚段不同区域的归一化植被指数(Nor-malized Diffefence Vegetation Index,NDVI)随季节变化的规律,并合成全年最大NDVI值代表当年植被最好时期的NDVI值,应用混合像元分解模型,计算研究区内的植被覆盖度并根据植被覆盖度的高低将研究区内的植被覆盖程度分为六个等级:无覆盖、极低覆盖度、低覆盖度、中覆盖度、中高覆盖度和高覆盖度.通过研究区内植被覆盖度的变化情况在一定程度上揭示研究区内植被变化情况.2000-2003年,研究区的植被覆盖水平有降低趋势,2003-2007年呈增加趋势,2007覆盖水平与2002年相近,2008年覆盖水平降低明显,为9 a来最低,是由研究区当年降水量减少引起;植被覆盖水平高的区域主要分布在研究区东北部的山区和西北部的平原区,植被覆盖水平较低的区域集中在流域中西部的干旱草原;高覆盖区域的植被覆盖年际变化幅度较中低覆盖区域的小.
英文摘要	In this paper,the MODIS 500 m data of the Irtysh River basin of Central Asia from 2000 to 2008 was used to analyze the NDVI’s seasonal variation regularities of the regions with different vegetation cover degrees.The annually largest value of NDVI obtained with synthesis method was represented as the NDVI value of vegetation in the best period of the year.The mixed-pixel decomposition model was applied to calculate the vegetation cover grades of the study area.According to their magnitude,the vegetation cover grades were divided into five levels:no vegetation cover,extremely low vegetation cover,low vegetation cover,media vegetation cover,superior vegetation cover and extremely high vegetation cover.The results show that the vegetation cover grades of the research area were reduced from 2000 to 2003,and became rising from 2003.The 2007 vegetation Cover grade was neady as the same as 2002’s.The 2008 vegetation cover-grade was reduced too much and it was the lowest in the nine years.The region with high vegetation cover grade distributed in the mountainous area with flourishing forest in its north-east and in the plain in its northwest,while the region with low vegetation cover grade distributed in the arid grass-land in its middle.The inter-annual variation of the vegetation cover grade in the low vegetation grade area is more obvious than that in the high vegetation grade area.
中文关键词	额尔齐斯河流域中亚段 ; 植被覆盖 ; 遥感监测
英文关键词	Irtysh River basin of Central Asia vegetation cover monitoring with remote sensing
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:3867343
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224990
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	李宝明,杨辽,朱长明,等. 额尔齐斯河流域中亚段植被覆盖遥感动态监测[J]. 中国科学院新疆生态与地理研究所,2010,33(2):203-209.
APA	李宝明,杨辽,朱长明,刘萍,&方晖.(2010).额尔齐斯河流域中亚段植被覆盖遥感动态监测.干旱区地理,33(2),203-209.
MLA	李宝明,et al."额尔齐斯河流域中亚段植被覆盖遥感动态监测".干旱区地理 33.2(2010):203-209.