| Temporal-spatial characteristics of vegetation cover and desertification of China by using remote sensing data |
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| 作者姓名： | XU Xingkui LIN Zhaohui LI Jianping ZENG Qingcun |
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| 作者单位： | LASG. Institute of Atmospheric Physics. Chinese Academy of Sciences. Beijing 100029. China,LASG. Institute of Atmospheric Physics. Chinese Academy of Sciences. Beijing 100029. China,LASG. Institute of Atmospheric Physics. Chinese Academy of Sciences. Beijing 100029. China,LASG. Institute of Atmospheric Physics. Chinese Academy of Sciences. Beijing 100029. China |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | Based on the NOAA advanced very high resolution radiometer (NOAA-AVHRR) remote sensing data of 1982 — 1999. the normalized difference vegetation index (NDVI) reflecting the surface vegetation cover has been obtained. Using the empirical orthogonal function analysis, the temporal-spatial eigenvectors of NDVI are given, and the characteristics of the spatial distribution of vegetation cover and its temporal variation together with the desertification of China are analyzed. It is found that the surface vegetation cover has seriously deteriorated in most part of China since 1995. along with the intensified desertification. All these are mainly caused by human activities although the climate change is responsible for the damage of surface vegetation cover to some extent.
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| 关 键 词： | remote sensing surface vegetation cover empirical orthogonal function normalized difference vegetation index |
Temporal-spatial characteristics of vegetation cover and desertification of China by using remote sensing data |
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| XU Xingkui,LIN Zhaohui,LI Jianping,ZENG Qingcun.Temporal-spatial characteristics of vegetation cover and desertification of China by using remote sensing data[J].Progress in Natural Science,2002,12(1):45-49. |
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| Authors: | XU Xingkui Lin Zhaohui LI Jianping ZENG Qingcun |
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| Institution: | LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Based on the NOAA advanced very high resolution radiometer (NOAA-AVHRR) remote sensing data of 1982～1999, the normalized difference vegetation index (NDVI) reflecting the surface vegetation cover has been obtained. Using the empirical orthogonal function analysis, the temporal-spatial eigenvectors of NDVI are given, and the characteristics of the spatial distribution of vegetation cover and its temporal variation together with the desertification of China are analyzed. It is found that the surface vegetation cover has seriously deteriorated in most part of China since 1995, along with the intensified desertification. All these are mainly caused by human activities although the climate change is responsible for the damage of surface vegetation cover to some extent. |
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| Keywords: | remote sensing surface vegetation cover empirical orthogonal function normalized difference vegetation index |
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