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Remote Sensing Technology and Application  2009, Vol. 24 Issue (5): 660-664    DOI: 10.11873/j.issn.1004-0323.2009.5.660
    
A Research of Net Primary Productivity Model of Grassland Based on MODIS Data in the Loess Plateau of China
WEI Li1,ZHAO Jun1,PAN Jing-hu1,2,LI Xia3
1.Collegeof Geographic and Environmental Science,Northwest NormalUniversity,Lanzhou730070,China ;
2.College of Resource and Environment Sciences,Lanzhou University,Lanzhou 730000,China ; 3.Gansu Geomatics Center,Lanzhou 730000,China
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Abstract  

Based on light-use efficiency model,a net primary productivity model for grassland using EOS/MODIS data was proposed.This model considered the influences of temperature and the difference of surface water vapor pressure.The NPP of grassland in 2003 was calculated using MODIS data with 1km×1km resolution from April to November in 2003,the multi-year annual average value of monthly solar radiation of 73 meteorological stations in the Loess Plateau and other relevant datasets.The result showed that the estimation of maximum net primary productivity of the entire Loess Plateau is 516 gC yr-1 while the minimum is 1 gC yr-1.The spatial pattern of NPP in Loess Plateau indicated that high values of NPP distributed in the south and west corners,then rapidly decreased from the southeast and northwest corners into the center inland regions.The trend is closely related with the differences of hydro-thermal conditions and the law of zonal differentiation of grassland.

 

Key words:   Net primary productivity       CASA Model       MODIS date       Loess Plateau     
Received:  09 April 2009      Published:  24 August 2010
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WEI Li
ZHAO Jun
PAN Jing-Hu
LI Xia

Cite this article: 

WEI Li, ZHAO Jun, PAN Jing-Hu, LI Xia. A Research of Net Primary Productivity Model of Grassland Based on MODIS Data in the Loess Plateau of China. Remote Sensing Technology and Application, 2009, 24(5): 660-664.

URL: 

http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2009.5.660     OR     http://www.rsta.ac.cn/EN/Y2009/V24/I5/660

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