PROGRESS IN GEOGRAPHY ›› 2000, Vol. 19 ›› Issue (4): 297-306.doi: 10.11820/dlkxjz.2000.04.002

• Original Articles • Previous Articles     Next Articles

Progresses of Terrestrial Carbon Cycle Studies

Geng Yuan bo, Dong Yun she, Meng Wei qi   

  1. Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2000-10-01 Revised:2000-11-01 Online:2000-12-25 Published:2000-12-25

Abstract: Progresses of terrestrial carbon cycle studies are introduced in terms of some recent home and oversea literatures in this paper. These progresses are as follows: ① Major terrestrial carbon reservoirs, i.e. the biomass of terrestrial biosphere, pedosphere and lithosphere, their organic carbon storages are 560Pg C, 1 400~1 500Pg C, 2 0×10 7Pg C respectively, and carbon storages of fossil fuels in lithosphere are about 5 000~10 000Pg C. Organic carbon storages of forest, grassland, desert, tundra, wetland and farmland in the terrestrial biosphere are 422Pg C、92 6 Pg C、5 9 Pg C、9 0 Pg C、7 8 Pg C、21 5 Pg C respectively. ② The “Missing sink” of CO 2 at atmosphere is about 0 7~3 1Pg C, and the assessing value of 1 7Pg C is generally thought to be satisfactory. It is possible that the “Missing sink” is located in middle latitude region of land in the earth. ③ The fluxes of CO 2 (Source) from LUCC (Land use/cover change) are between 0 6 and 3 6Pg C, and results of flux from different researchers have much difference. The value of global source and sink of CH4 is (535±125) Tg CH 4/a and (560±100) Tg CH 4/a respectively. ④ Some studies show that increasing concentration of CO 2 in atmosphere can increase NPP of vegetation. ⑤ The dynamic models of terrestrial carbon cycling have been developed recently, and the effect of LUCC and the coupling of cycling of C、N、P and S have been paid more attention to in these models.

Key words: model of carbon cycle, sink, source, terrestrial carbon cycle

CLC Number: 

  • P595