[1]LIU Dan,YU Chenglong.Estimation on Climatic Productivity of Vegetation NPP in Northeastern China Based on MODIS[J].Research of Soil and Water Conservation,2017,24(04):315-323.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 04
Page number:
315-323
Column:
Public date:
2017-08-28
- Title:
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Estimation on Climatic Productivity of Vegetation NPP in Northeastern China Based on MODIS
- Author(s):
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LIU Dan, YU Chenglong
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Heilongjiang Province Institute of Meteorological Sciences;Harbin 150030;China
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- Keywords:
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NPP; estimation model; climatic productivity; MODIS; Northeastern China
- CLC:
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Q948
- DOI:
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- Abstract:
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Net primary productivity (NPP) is a key component of the terrestrial carbon cycle and the accurate estimation on NPP can provide some reference for regional ecological construction and protection. Based on the MODIS data and meteorological data, the spatiotemporal change of annual NPP accumulation per unit area in Northeastern China from 2001 to 2013 was analyzed. Different vegetation cover types were divided and the climatic estimation model of vegetation NPP was constructed. And then we estimated the climatic productivity of vegetation NPP in 2013. The results showed as follows. (1) There were significant differences in average annual NPP accumulation (NPP) per unit area from 2001 to 2013 in Northeastern China. It ranged from 15 gC/(m2·a) to 1 000 gC/(m2·a) and it was especially higher in the coastal area of the southeastern Liaoning Province and on eastern slope of Changbai Mountains, with the value of 800~1 000 gC/(m2·a). (2) The interannual variation of (NPP) had no obvious characteristics. But its variation of natural vegetation was bigger than artificial vegetation. (3) Based on (NPP), the vegetation of Northeastern China was divided into three types and the relationships between NPP of each vegetation type and temperature, precigaipitation, evapotranspiration, and light conditions were analyzed. And then the simulated values were obtained by the climatic estimation model of vegetation NPP. The results showed that there was very significant correlation between the simulated values and the observed values. The climatic estimation model and the simulated results of vegetation NPP were more stable and reliable. (4) The climatic productivity of vegetation NPP of Northeastern China in 2013 was 422~1 100 g C/(m2·a). The simulated values in the northern mountains were closer to the observed ones, but were greatly different in the southern area.