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影响因子：4.189

DOI码：10.1002/2017MS000920

发表刊物：Journal of Advances in Modeling Earth Systems

摘要：Microbial physiology plays a critical role in the biogeochemical cycles of the Earth system. How-ever, most traditional soil carbon models are lacking in terms of the representation of key microbial pro-cesses that control the soil carbon response to global climate change. In this study, the improved process-based model TRIPLEX-GHG was developed by coupling it with the new MEND (Microbial-ENzyme-mediatedDecomposition) model to estimate total global soil organic carbon (SOC) and global soil microbial carbon.The new model (TRIPLEX-MICROBE) shows considerable improvement over the previous version (TRIPLEX-GHG) in simulating SOC. We estimated the global soil carbon stock to be approximately 1195 Pg C, with 348Pg C located in the high northern latitudes, which is in good agreement with the well-regarded HarmonizedWorld Soil Database (HWSD) and the Northern Circumpolar Soil Carbon Database (NCSCD). We also esti-mated the global soil microbial carbon to be 21 Pg C, similar to the 23 Pg C estimated by Xu et al. (2014).We found that the microbial carbon quantity in the latitudinal direction showed reversions at approximately308N, near the equator and at 258S. A sensitivity analysis suggested that the tundra ecosystem exhibited thehighest sensitivity to a 18C increase or decrease in temperature in terms of dissolved organic carbon (DOC),microbial biomass carbon (MBC), and mineral-associated organic carbon (MOC). However, our work repre-sents the first step toward a new generation of ecosystem process models capable of integrating key micro-bial processes into soil carbon cycles.

论文类型：期刊论文

卷号：9

期号：6

页面范围：2368-2384

是否译文：否

发表时间：2017-10-01

收录刊物：SCI

第一作者：Kefeng Wang

通讯作者：Changhui Peng

合写作者：Qiuan Zhu

合写作者：Xiaolu Zhou

合写作者：Meng Wang

合写作者：Kerou Zhang

合写作者：Gangsheng Wang