The response of leaf area index of MODIS to mountainous meteorological conditions in Guizhou
The growth characteristics of the leaf area index (LAI) in Guizhou province and their relationship with various climatic factors(e.g. temperature, precipitation, water vapor and sunshine duration) were analyzed using the data collected by the Moderate Resolution Imaging Speetroradiometer (MODIS) between 2001 and 2008. The LAI data were collected with the occurring once every 8 days. The climatic observation records came from 69 weather stations in Guizhou, and the LAI data with 3*3 pixels in the 69 sites were employed to analyze the relationship between the LAI and climatic factors. The variation values of the mean LAI are from 0.3 to 3.0 in one year. The spatial patterns of the average annual LAI are from 1.0(on the west and southwest) to 4.0(on the southeast).Correlation analysis show that the relationship between the LAI and climatic factors are significant at 99.9 confidence level and that temperature is the primary factor influencing the LAI, with water vapor, sunshine duration and precipitation playing the roles from secondary to fourth respectively.
MODIS (Moderate Resolution Imaging Spectroradiometer)LAI (leaf area index)climatespatiotemporal responseKarst area
国家科技期刊平台
NSTL
万方数据
维普
