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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (2): 597-603    DOI: 10.7522/j.issn.1000-694X.2013.00082
    
Estimation of Aboveground Biomass by Remote Sensing in the Western Inner Mongolia Grassland
GAO Tian, XU Bin, YANG Xiu-chun, JIN Yun-xiang, MA Hai-long, LI Jin-ya, YU Hai-da
Key Laboratory of Agri-informatics of the Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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Abstract  

Using 756 field aboveground biomass (AGB) samples from the western Inner Mongolia grassland during 2005-2011, and MODIS-NDVI 16-day tiled product with a spatial resolution of 500 m×500 m during 2001-2011, we identified the size and distribution of aboveground biomass with statistic model and explored possible relationships between spatio-temporal pattern of AGB and climatic factors for the studied area. Results are summarized as follows: (1) AGB averaged 5.27 Tg in the western Inner Mongolia grassland during 2001-2011, experiencing a slight decrease trend. (2) AGB density exhibited a large spatial heterogeneity in the western Inner Mongolia grassland, and decreased from the southeast to the northwest. (3) AGB variation was in good accordance with inter-annual precipitation from January to July, but did not show a robust relationship with the temperature changes at the corresponding time. Precipitation was also a primarily determinant of the spatial pattern of AGB in the studied area, and the temperature might be a minor factor. However, the estimation has limitations due to uncertainties in the standards of field measurement, the uniform conversion factors that fresh grass yield converted to AGB (dry weight mass), underestimate of shrub biomass and satellite time series data sets.

Key words:  western Inner Mongolia      grassland      NDVI      aboveground biomass      climatic factors     
Received:  21 May 2012      Published:  25 June 2012
ZTFLH:  S812  

Cite this article: 

GAO Tian, XU Bin, YANG Xiu-chun, JIN Yun-xiang, MA Hai-long, LI Jin-ya, YU Hai-da. Estimation of Aboveground Biomass by Remote Sensing in the Western Inner Mongolia Grassland. JOURNAL OF DESERT RESEARCH, 2013, 33(2): 597-603.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00082     OR     http://www.desert.ac.cn/EN/Y2013/V33/I2/597

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