Size, distribution, and vulnerability of the global soil inorganic carbon

• 成果类型: Article
• 署名作者: Huang, Yuanyuan; Song, Xiaodong; Wang, Ying-Ping; Canadell, Josep G.; Luo, Yiqi; Ciais, Philippe; Chen, Anping; Hong, Songbai; Wang, Yugang; Tao, Feng; Li, Wei; Xu, Yiming; Mirzaeitalarposhti, Reza; Elbasiouny, Heba; Savin, Igor; Shchepashchenko, Dmitry; Rossel, Raphael A. Viscarra; Goll, Daniel S.; Chang, Jinfeng; Houlton, Benjamin Z.; Wu, Huayong; Yang, Fei; Feng, Xiaoming; Chen, Yongzhe; Liu, Yu; Niu, Shuli; Zhang, Gan-Lin
• 署名单位: Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; Nanjing Institute of Soil Science, CAS; Commonwealth Scientific & Industrial Research Organisation (CSIRO); CSIRO Environment; Commonwealth Scientific & Industrial Research Organisation (CSIRO); CSIRO Environment; Cornell University; CEA; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); Colorado State University System; Colorado State University Fort Collins; Colorado State University System; Colorado State University Fort Collins; Peking University; Peking University Shenzhen Graduate School (PKU Shenzhen); Chinese Academy of Sciences; Xinjiang Institute of Ecology & Geography, CAS; Cornell University; Cornell University; Tsinghua University; Beijing Forestry University; University Hohenheim; Egyptian Knowledge Bank (EKB); Al Azhar University; Dokuchaev Soil Science Institute; Peoples Friendship University of Russia; International Institute for Applied Systems Analysis (IIASA); Russian Academy of Sciences; Siberian Federal University; Curtin University; Zhejiang University; Chinese Academy of Sciences; Research Center for Eco-Environmental Sciences (RCEES), CAS; University of Hong Kong; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Nanjing Institute of Geography & Limnology, CAS
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-14039
• DOI: 10.1126/science.adi7918
• 发表日期: 2024-04-12
• 页码: 233-239
• 关键词: organic-carbon; LAND; sink; co2; sequestration; transport; caliche; dioxide; erosion; fluxes

摘要

Global estimates of the size, distribution, and vulnerability of soil inorganic carbon (SIC) remain largely unquantified. By compiling 223,593 field-based measurements and developing machine-learning models, we report that global soils store 2305 +/- 636 (+/- 1 SD) billion tonnes of carbon as SIC over the top 2-meter depth. Under future scenarios, soil acidification associated with nitrogen additions to terrestrial ecosystems will reduce global SIC (0.3 meters) up to 23 billion tonnes of carbon over the next 30 years, with India and China being the most affected. Our synthesis of present-day land-water carbon inventories and inland-water carbonate chemistry reveals that at least 1.13 +/- 0.33 billion tonnes of inorganic carbon is lost to inland-waters through soils annually, resulting in large but overlooked impacts on atmospheric and hydrospheric carbon dynamics.