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Analysis of vegetation response to rainfall with satellite images in Dongting Lake
Jiang W. G.; Hou P.; Zhu X. H.; Cao G. Z.; Liu X. M.; Cao R. Y.
Source PublicationJournal of Geographical Sciences
2011
Volume21
Issue1
Pages135-149
KeywordEco-hydrology Precipitation Vegetation Remote Sensing Wetland Dongting Lake Atmospheric Precipitation Interannual Variability Noaa-avhrr Region Index
AbstractWe analyzed the Normalized Difference Vegetation Index (NDVI) from satellite images and precipitation data from meteorological stations from 1998 to 2007 in the Dongting Lake wetland watershed to better understand the eco-hydrological effect of atmospheric precipitation and its relationship with vegetation. First, we analyzed its general spatio-temporal distribution using its mean, standard deviation and linear trend. Then, we used the Empirical Orthogonal Functions (EOF) method to decompose the NDVI and precipitation data into spatial and temporal modes. We selected four leading modes based on North and Scree test rules and analyzed the synchronous seasonal and inter-annual variability between the vegetation index and precipitation, distinguishing time-lagged correlations between EOF modes with the correlative degree analysis method. According to our detailed analyses, the vegetation index and precipitation exhibit a prominent correlation in spatial distribution and seasonal variation. At the 90% confidence level, the time lag is around 110 to 140 days, which matches well with the seasonal variation.
Indexed BySCI
Language英语
ISSN1009-637X
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/23751
Collection历年回溯文献
Recommended Citation
GB/T 7714
Jiang W. G.,Hou P.,Zhu X. H.,et al. Analysis of vegetation response to rainfall with satellite images in Dongting Lake. 2011.
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