Zhou Zhenghu, Ren Chengjie, Wang Chuankuan, Delgado-Baquerizo Manuel, Luo Yiqi, Luo Zhongkui, Du Zhenggang, Zhu Biao, Yang Yuanhe, Jiao Shuo, Zhao Fazhu, Cai Andong, Yang Gaihe, Wei Gehong
College of Ecology and Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin, Heilongjiang, China.
Northeast Asia Biodiversity Research Center, Northeast Forestry University, Harbin, Heilongjiang, China.
Nat Commun. 2024 Jun 22;15(1):5329. doi: 10.1038/s41467-024-49743-7.
Soil organic carbon (SOC) persistence is predominantly governed by mineral protection, consequently, soil mineral-associated (MAOC) and particulate organic carbon (POC) turnovers have different impacts on the vulnerability of SOC to climate change. Here, we generate the global MAOC and POC maps using 8341 observations and then infer the turnover times of MAOC and POC by a data-model integration approach. Global MAOC and POC storages are Pg C (mean with 5% and 95% quantiles) and Pg C, while global mean MAOC and POC turnover times are yr and yr in the top meter, respectively. Climate warming-induced acceleration of MAOC and POC decomposition is greater in subsoil than that in topsoil. Overall, the global atlas of MAOC and POC turnover, together with the global distributions of MAOC and POC stocks, provide a benchmark for Earth system models to diagnose SOC-climate change feedback.
土壤有机碳（SOC）的持久性主要受矿物保护作用的控制，因此，与土壤矿物相关的有机碳（MAOC）和颗粒有机碳（POC）的周转对SOC应对气候变化的脆弱性有不同影响。在此，我们利用8341个观测数据生成了全球MAOC和POC地图，然后通过数据-模型整合方法推断MAOC和POC的周转时间。全球MAOC和POC储量分别为Pg C（均值以及5%和95%分位数）和Pg C，而在表层一米土壤中，全球MAOC和POC的平均周转时间分别为年和年。气候变暖导致的MAOC和POC分解加速在底土中比在表土中更为显著。总体而言，MAOC和POC周转的全球图谱，以及MAOC和POC储量的全球分布，为地球系统模型诊断SOC-气候变化反馈提供了一个基准。
