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	基于MODIS NDVI和气候信息的草原植被变化监测
其他题名	Grassland Vegetation Change Based on MODIS NDVI Data and Climate Information
	陈燕丽 1; 龙步菊 1; 潘学标 1; 莫伟华 2
来源期刊	应用气象学报
ISSN	1001-7313
出版年	2010
卷号	21 期号:2 页码:229-236
中文摘要	对植被的动态监测可以从一定程度上反映气候变化趋势. 该文利用2000--2005年MODIS NDVI数据对锡林郭勒盟典型草原植被变化进行动态监测,在此基础上,以降水量、水汽压、平均气温、最高气温、最低气温、日照时数作为气候指标,分析锡林郭勒盟典型草原和荒漠草原MODIS NDVI与同期及前期气候因子的相关性,探讨草原植被变化的气候驱动因子. 结果表明:2000--2005年锡林郭勒盟植被改善面积大于退化面积,植被退化面积最大的区域为荒漠草原,占全盟面积的12.84%,植被改善面积最大的区域为典型草原,占全盟面积29.09%. 4类草原改善趋势由强到弱的顺序为草甸草原、典型草原、沙地草原、荒漠草原. 对于典型草原,其NDVI与最高气温关系最密切,其次为水汽压;对于荒漠草原,其NDVI与最高气温关系最为密切,其次为最低气温. 此外,NDVI对气候因子的响应表现出明显的时滞效应
英文摘要	Monitoring vegetation change is an important aspect to study global climate change. The Normalized Difference Vegetation Index (NDVI) is the most frequently-used vegetation index to discuss environmental change. It’s common to study vegetation change using the NOAA Advanced Very High Resolution Radiometer (AVHRR) data which are available for more than 20 years, and the EOS-Moderate Resolution Imaging Spectroradiometer (MODIS) data with improved quality are also widely used now. MODIS NDVI dataset during 2000-2005 in Xilingol are analyzed. Precipitation, vapor pressure, mean temperature, max temperature, min temperature, hours of sunshine are taken as climatic elements to explore the relationship between MODIS NDVI and climatic factors over different types of grassland. Due to the narrow spectra bands of infrared and near-infrared satellite sensors, MODIS NDVI is sensitive for dynamically monitoring the four types of steppe: Meadow steppe, typical steppe, sandy steppe, desert steppe. As the water conditions of these four typical grassland vary widely, their spectral responses are also significantly different. The vegetation increases on the whole in Xilingol during the period of 2000 to 2005. Desert steppe decreases while typical steppe increases for the research area. The global warming trend is obvious in Xilingol. Although the rain doesn’t increase much from 2000 to 2005, the grassland grows for the meadow steppe and the typical steppe, promoted by the increasing temperature and better water conditions. For the sandy steppe and the desert steppe where water conditions are poor, as the increasing temperature accelerates water evaporation, the vegetation degradation occurs as a result of the worse environment. MODIS NDVI series exhibit obvious correlation with climatic factors. For t pical steppe, max temperature is the most related factor with NDVI, and vapor pressure is the second. For desert steppe, max temperature is the most related factor with NDVI, and min temperature is in the second place. Responses of MODIS NDVI to climatic factors lag in time obviously. The lag time for all climatic factors is -1 stage for typical steppe, and for desert steppe, the lag time for both water and mean temperature climatic factors is -1 stage, while the lag time is inconsistent for max temperature and min temerature, which may be caused by the differences of soil texture and vegetation types
中文关键词	植被变化 ; 气候变化 ; 锡林郭勒盟
英文关键词	NDVI NDVI vegetation change climate change Xilingol
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:3960277
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225849
作者单位	1.中国农业大学资源与环境学院农业气象系, 北京 100094, 中国; 2.广西气象减灾研究所, 南宁, 广西 530022, 中国
推荐引用方式 GB/T 7714	陈燕丽,龙步菊,潘学标,等. 基于MODIS NDVI和气候信息的草原植被变化监测[J]. 中国农业大学,2010,21(2):229-236.
APA	陈燕丽,龙步菊,潘学标,&莫伟华.(2010).基于MODIS NDVI和气候信息的草原植被变化监测.应用气象学报,21(2),229-236.
MLA	陈燕丽,et al."基于MODIS NDVI和气候信息的草原植被变化监测".应用气象学报 21.2(2010):229-236.