| 1998-2002年我国陆地植被变化探测研究 |
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| 引用本文： | 徐文婷,颜长珍.1998-2002年我国陆地植被变化探测研究[J].郑州大学学报(理学版),2004,36(2):54-57. |
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| 作者姓名： | 徐文婷 颜长珍 |
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| 作者单位： | 1. 中国科学院遥感应用研究所,北京,100101;中国科学院研究生院,北京,100101
2. 中国科学院遥感应用研究所,北京,100101;中国科学院兰州寒区旱区环境与工程研究所,兰州,730000 |
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| 摘 要： | 以长时间序列VGT-NDVI为数据源,利用年内变异系数与年份回归分析的方法对1998-2002年间的中国陆地植被NDVI的变化情况进行了分析.中国大部分地区线性回归相关性显著,整体相关系数为0.78.研究结果表明,在这五年间,中国北方的植被覆盖呈增加状态,而南部地区的植被覆盖情况则有明显的减少趋势.总体来讲,中国的西部变动情况大于东部,并且西北呈增加趋势,西南则呈减少趋势.
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| 关 键 词： | 植被变化 回归分析 中国 1998-2002年 |
| 文章编号： | 1671-6841(2004)02-0054-04 |
| 修稿时间： | 2003年11月18 |
Measurement of Vegetation Change in China,1998-2002 |
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| Xu Wenting.,Yan Changzhen..Measurement of Vegetation Change in China,1998-2002[J].Journal of Zhengzhou University:Natural Science Edition,2004,36(2):54-57. |
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| Authors: | Xu Wenting Yan Changzhen |
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| Institution: | Xu Wenting1.2,Yan Changzhen1.3 |
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| Abstract: | The vegetation cover changes in China since 1998 to 2002 are assessed with Normalized Difference Vegetation Index(NDVI) data. The framework for the analysis is the use of the coefficient of variation (COV) of the decadal NDVI as a measurement of vegetative biomass change. A higher NDVI COV for a given pixel represents a greater change in vegetation biomass in the ground area represented by that pixel. A linear regression is used to determine the trend of COV value for each pixel over the 5 years. The slope of the linear regression is 0. 78. Results show that vegetation ecosystems in China are undergoing accelerated change due to natural and anthropogenic disturbances since 1998. Changes of Western in China are much more than Eastern,and there are the increase trends in the North area over 5 years. |
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| Keywords: | VGT-NDVI |
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