Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Geographica Sinica》 2001-04
Add to Favorite Get Latest Update

Simulations of Carbon Exchange Between Global Terrestrial Ecosystem and the Atmosphere

LI Yin peng JI Jin jun (Institute of Atmospheric Physics,CAS,Beijing 100029,China)  
In this paper the NPP of global terrestrial ecosystem is estimated by an Atmosphere Vegetation Interaction Model (AVIM). AVIM consists of two intercoupled components: physical processes, involving water and energy transfer among soil, vegetation and the atmosphere at the land surface and eco physiological processes, i.e., photosynthesis, respiration, dry matter allocation, littering and phenology. Globally vegetation is classified into 13 types and soil texture is classified into 6 types, and parameters of eco physiological processes for each vegetation type for AVIM are collected. Daily weather data for 0.5×0.5 grid cells as the forcing of model are generated from monthly climate data. The estimated NPP for different vegetation types at 19 sites are validated with the observed. Three time steps are used for different processes in the model: 30 minutes for physical processes, one hour for physiological processes, and one day for biomass accumulation of tissues. The main results of NPP estimation show that global averaged NPP is 405.13 g C m 2 yr 1 , varying from 99.58 g C m 2 y 1 (tundra) to 996.2 gm 2 yr 1 (rainforest). Global total annual NPP is about 60.72 Gt C yr 1 , in which the maximum part, about 15 84 Gt C yr 1 , or 26.09% of the total, is contributed by tropical rainforest.
【Fund】: 国家重点基础研究专项经费资助项目 ( G1 9990 4 34 0 0 );; 中国科学院大气物理研究所创新基金&&
【CateGory Index】: X171
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved