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Volume 18 Issue 5

Sep.  2001

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2001 >  18(5): 807-818

Model Estimates of Global Carbon Flux between Vegetation and the Atmosphere

  • 1.

    Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029

  • The net primary productivity (NPP) of global terrestrial vegetation is estimated by an Atmosphere-Vegetation Interaction Model (AVIM). AVIM consists of two intercoupled components: phys ical processes, involving water and energy transfer among soil, vegetation and the atmosphere at the land surface and eco-physiological processes, ie. photosynthesis, respiration, dry matter allocation, littering, phenology. Globally vegetation is classified into 13 types and soil texture is classified into 6 types. The esti mated NPP for different vegetation types at 1637 sites are validated with the observed data provided by EMDI. The main results of NPP estimation show that global averaged NPP is 405.13 g C m-2yr-1 varying from 99.58 g C m-2yr-1 (tundra) to 996.2 g m-2yr-1 (rainforest). Global total annual NPP is about 60.72Gt Cyr-1, in which the maximum part, about 15.84 Gt C yr-1, accounting for 26.09% of the total is contributed by tropical rainforest. The maximum carbon sink occurs in the temperate region of the Northern Hemi sphere. The global spatial and seasonal distribution of terrestrial NPP is estimated reasonably.
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    • Manuscript History

    Manuscript received: 10 September 2001
    Manuscript revised: 10 September 2001
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Model Estimates of Global Carbon Flux between Vegetation and the Atmosphere

    • 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2001-09-10
    • Manuscript revised: 2001-09-10

    Abstract: The net primary productivity (NPP) of global terrestrial vegetation is estimated by an Atmosphere-Vegetation Interaction Model (AVIM). AVIM consists of two intercoupled components: phys ical processes, involving water and energy transfer among soil, vegetation and the atmosphere at the land surface and eco-physiological processes, ie. photosynthesis, respiration, dry matter allocation, littering, phenology. Globally vegetation is classified into 13 types and soil texture is classified into 6 types. The esti mated NPP for different vegetation types at 1637 sites are validated with the observed data provided by EMDI. The main results of NPP estimation show that global averaged NPP is 405.13 g C m-2yr-1 varying from 99.58 g C m-2yr-1 (tundra) to 996.2 g m-2yr-1 (rainforest). Global total annual NPP is about 60.72Gt Cyr-1, in which the maximum part, about 15.84 Gt C yr-1, accounting for 26.09% of the total is contributed by tropical rainforest. The maximum carbon sink occurs in the temperate region of the Northern Hemi sphere. The global spatial and seasonal distribution of terrestrial NPP is estimated reasonably.

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