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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Xu Wenting Wu Bingfang Yan Changzhen |
| Copyright Year | 2004 |
| Description | Author affiliation: Inst. of Remote Sensing Applications, Chinese Acad. of Sci., Beijing, China (Xu Wenting; Wu Bingfang; Yan Changzhen) |
| Abstract | The primary objective of this study was to assess the trends of vegetation changes in west of China since 1998 to 2002 with the 1 km/sup 2/-resolution SPOT-Vegetation 10-day maximum-value synthesized 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 measure 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. And then a linear regression was used to determine the trend of COV value for each pixel over the 5-year period. The slope of the linear regression can be gained and acted as the criterion for the change direction. Pixels with a negative slope are considered to represent ground areas with decreasing amounts of vegetation, vice versa. Results showed vegetation ecosystems in west of China are undergoing accelerated change due to natural and anthropogenic disturbances since 1998 had the increase trends in the five years. |
| Starting Page | 3417 |
| Ending Page | 3419 |
| File Size | 476625 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780387422 |
| DOI | 10.1109/IGARSS.2004.1370439 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-09-20 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Vegetation mapping Linear regression Biomass Remote monitoring Image sensors Image resolution Optical distortion Remote sensing Ecosystems Acceleration |
| Content Type | Text |
| Resource Type | Article |
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