Soil carbon pools and world life zones

Storage and Turnover of Organic Matter in Soil

“…Post et al (1982) estimate an error of ±200 Pg C (14%), reflecting the variability in soil C inventory within each life zone category. Eswaran et al (1993) show large coefficients of variation, of 28-70%, for soils within given soil classification categories.…”

“…The first, used by Schlesinger (1977) and Post et al (1982), relates C storage to climate and vegetation (for example, expressed as Holdridge life zone classifications). For example, Post et al (1982) generated relationships of climate and vegetation with soil C using 2,700 soil profiles, and used these to calculate a global soil C inventory of 1,400 Pg C in the top 1 m. A second approach uses soil mapping units for extrapolation (Eswaran et al 1993;Batjes 1996). Eswaran (1993) determined the average C inventory for each soil order, based on data from roughly 1,000 pedons from FAO/UNESCO and 15,000 profiles from U.S. Dept.…”

Soil carbon storage and its determinants in the forests of Shaanxi Province, China

“…着地球表层各系统之间的碳循环。据估计, 全世界 土壤有机碳储量约为1 550 Pg (Lal, 2004), 是植被 碳 库的2 至 3 倍 , 是大气碳库 的2 倍 (Smith et al, 2008)。由于土壤的呼吸作用, 土壤碳库较小幅度的 变化就可能影响生态系统各组分的碳交换过程, 对 陆地生态系统碳循环产生至关重要的影响。森林作 为陆地生态系统的主体, 是陆地上最大的碳储库和 碳汇, 其土壤碳贮量约占陆地土壤的73% (Post et al, 1982) …”

Scenarios of land cover in Karst area of Southwestern China

“…The HLZ model (Holdridge 1947(Holdridge , 1967(Holdridge , 1971) is a scheme which utilizes the three bioclimatic variables to formulate the biome distribution (Yue et al , 2006). The HLZ model relates the distribution of major biome types (termed life zones) to bioclimatic variables, and has been widely accepted for use in projecting the impact of climate change on vegetation distribution (Post et al 1982;Belotelov et al 1996;Peng 2000Fan et al 2013b). The biome types distribution in China include nival area, alpine dry tundra, alpine moist tundra, alpine wet tundra, alpine rain tundra, boreal desert, boreal dry scrub, boreal moist forest, boreal wet forest, boreal rain forest, cool temperate desert, cool temperate scrub, cool temperate steppe, cool temperate moist forest, cool temperate wet forest, cool temperate rain forest, warm temperate desert, warm temperate desert scrub, warm temperate thorn steppe, warm temperate dry forest, warm temperate moist forest, warm temperate wet forest, subtropical dry forest, subtropical moist forest, subtropical wet forest, tropical desert and tropical moist forest.…”