Title :
Seasonal Variation of MODIS Vegetation Indexes and Their Statistical Relationship With Climate Over the Subtropic Evergreen Forest in Zhejiang, China
Author :
Deng, Fangping ; Su, Gaoli ; Liu, Chuang
Author_Institution :
Inst. of Geographic Sci. & Natural Resource Res., Chinese Acad. of Sci., Beijing
fDate :
4/1/2007 12:00:00 AM
Abstract :
Moderate Resolution Imaging Spectroradiometer (MODIS) 16-day 1-km vegetation index products, daily temperature, photosynthetically active radiation (PAR), and precipitation from 2001 to 2004 were utilized to analyze the temporal variations of the MODIS normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI), as well as their correlations with climate over the evergreen forested sites in Zhejiang-a humid subtropical region in the southeast of China. The results showed that both NDVI and EVI could discern the seasonal variation of the evergreen forests. Attributed to the sufficient precipitation in the study area, the growth of vegetation is mainly controlled by energy; as a result, NDVI, and especially EVI, is more correlated with temperature and PAR than precipitation. Compared with NDVI, EVI is more sensitive to climate condition and is a better indicator to study vegetation variations in the study region
Keywords :
atmospheric precipitation; atmospheric techniques; atmospheric temperature; climatology; correlation methods; forestry; radiometry; vegetation mapping; AD 2001 to 2004; China; MODIS; Moderate Resolution Imaging Spectroradiometer; Zhejiang; atmospheric precipitation; atmospheric temperature; climate; correlation analysis; enhanced vegetation index; normalized difference vegetation index; photosynthetically active radiation; statistical relationship; subtropic evergreen forest; Image analysis; Image resolution; MODIS; Radiometry; Remote sensing; Spectroradiometers; Temperature control; Temperature distribution; Temperature sensors; Vegetation mapping; Correlation analysis; Moderate Resolution Imaging Spectroradiometer (MODIS); enhanced vegetation index (EVI); normalized difference vegetation index (NDVI);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2006.888844
