Analysis of China Vegetation Dynamics Using NOAA-AVHRR Data from 1982 to 2001  

利用NOAA-AVHRR数据分析1982-2001年间中国植被的动态变化(英文)

作　　者：HABIB Aziz Salim 陈晓玲 龚健雅 王海燕 张俐 

机构地区：[1]State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University

出　　处：《Geo-Spatial Information Science》2009年第2期146-153,共8页地球空间信息科学学报（英文）

基　　金：Supported by the National 973 Program of China (No2006CB701300);the National Natural Science Foundation of China (No40721001);the Sino-Germany Joint Project (No 2006DFB91920)

摘　　要：The authors derived the normalized difference vegetation index （NDVI） from the NOAA/AVHRR Land dataset, at a spatial resolution of 8km and 15-day intervals, to investigate the vegetation variations in China during the period from 1982 to 2001. Then, GIS is used to examine the relationship between precipitation and the Normalized Difference Vegetation Index （NDVI） in China, and the value of NDVI is taken as a tool for drought monitoring. The results showed that in the study period, China＇s vegetation cover had tended to increase, compared to the early 1980s; mean annual NDVl increased 3.8%. The agricultural regions （Henan, Hebei, Anhui and Shandong） and the west of China are marked by an increase, while the eastern coastal regions are marked by a decrease. The correlation between monthly NDVl and monthly precipitation/temperature in the period 1982 to 2001 is significantly positive （R^2 =0.80, R^2 =0.84）; indicating the close coupling between climate conditions （precipitation and temperature） and land surface response patterns over China. Examination of NDVl time series reveals two periods： （1） 1982-1989, marked by low values below average NDVI and persistence of drought with a signature large-scale drought during the 1982 and 1989; and （2） 1990-2001, marked by a wetter trend with region-wide high values above average NDVl and a maximum level occurring in 1994 and 1998.The authors derived the normalized difference vegetation index (NDVI) from the NOAA/AVHRR Land dataset, at a spatial resolution of 8km and 15-day intervals, to investigate the vegetation variations in China during the period from 1982 to 2001. Then, GIS is used to examine the relationship between precipitation and the Normalized Difference Vegetation Index (NDVI) in China, and the value of NDVI is taken as a tool for drought monitoring. The results showed that in the study period, China’s vegetation cover had tended to increase, compared to the early 1980s; mean annual NDVI increased 3.8%. The agricultural regions (Henan, Hebei, Anhui and Shandong) and the west of China are marked by an increase, while the eastern coastal regions are marked by a decrease. The correlation between monthly NDVI and monthly precipitation/temperature in the period 1982 to 2001 is significantly positive ( R 2=0.80, R 2=0.84); indicating the close coupling between climate conditions (precipitation and temperature) and land surface response patterns over China. Examination of NDVI time series reveals two periods: (1) 1982-1989, marked by low values below average NDVI and persistence of drought with a signature large-scale drought during the 1982 and 1989; and (2) 1990-2001, marked by a wetter trend with region-wide high values above average NDVI and a maximum level occurring in 1994 and 1998.

关 键 词：NOAA-AVHRR NDVI TEMPERATURE PRECIPITATION DROUGHT China 

分 类 号：Q948[生物学—植物学]