Temporalspatial variations of carbon sink/source in Northeast China from 2000 to 2010

doi:10.3969/j.issn.1000-5641.2015.04.017

Abstract

Abstract: Net Ecosystem Productivity (NEP) is an important parameter when estimating regional carbon source/sink. Based on EOS/MODIS data and meteorological data, NEP was calculated in Heilongjiang, Jilin and Liaoning from 2000 to 2010. The temporal characteristics of NEP were analyzed, the results showed that during 2000 to 2010 most areas in three provinces of Northeast China were carbon sinks, NEP was between 0~300 g C·m-2·a-1, carbon sources were in Northwestern Jinlin and Southwestern Heilongjiang; the mean NEP of forest(176.74 g C·m-2·a-1) was the highest, followed by shrub(175.02 g C·m-2·a-1), the carbon sequestration ability of farmland, wetland and grass decreased successively. In nearly 66.36% of the territory of the study area, NEP tended to decline, which meaned their carbon sequestration were weaker. Area with increased carbon sequestration were in Southeastern Changbai Mountain in Liaoning province and hills in western Liaoning, where the increasing slope was between 5~15. The correlation coefficient between NEP and precipitation was significant; NEP was sensitive to the extreme value of the temperature and precipitation, the trend of NEP was consistent with the fluctuation of precipitation. This paper conducted regional simulation of carbon sink/source, providing theoretical basis and methodological references for the usage of remote sensing data in the related study areas.

Key words: NEP, Northeast China, MODIS

CLC Number:

Q149

ZHANG Lu，WANG Jing，SHI Run-he. Temporalspatial variations of carbon sink/source in Northeast China from 2000 to 2010[J]. Journal of East China Normal University(Natural Sc, 2015, 2015(4): 164-.

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