近年发表的关于陆地碳循环的国内外论著反映出如下观点 :1陆地主要的碳库 -陆地生物圈、土壤圈和岩石圈的碳贮量分别为 560 Pg C、 1 40 0～ 1 50 0 Pg C(有机碳 )、 2 .0× 1 0 7Pg C(有机碳 ) ,其中岩石圈中化石燃料的贮量约为 50 0 0～ 1 0 0 0 0 Pg C;2大气 CO2“未知汇”的量大概在 0 .7～ 3.1 Pg C之间 ,“未知汇”可能存在于中纬度地区 ;3土地利用与土地覆被变化造成的 CO2 排放量估计值差异较大 ,可能在 0 .6～ 3.6Pg C之间 ;4陆地碳循环模型已从静态模型发展到动态模型 ,而且更加注重大气 CO2 浓度增加和 LUCC对碳循环的影响以及 C、 N、 P和 S等循环的耦合作用。

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.