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

Huang, Y., Song, X., Wang, Y.-P., Canadell, J.G., Luo, Y., Ciais, P., Chen, A., Hong, S., Wang, Y., Tao, F., Li, W., Xu, Y., Mirzaeitalarposhti, R., Elbasiouny, H., Savin, I., Shchepashchenko, D. ORCID: https://orcid.org/0000-0002-7814-4990, Rossel, R., Goll, D., Chang, J. ORCID: https://orcid.org/0000-0003-4463-7778, Houlton, B., et al. (2024). Size, distribution, and vulnerability of the global soil inorganic carbon. Science 384 (6692) 233-239. 10.1126/science.adi7918.

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Abstract

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.

Item Type:	Article
Research Programs:	Advancing Systems Analysis (ASA) Advancing Systems Analysis (ASA) > Novel Data Ecosystems for Sustainability (NODES) Biodiversity and Natural Resources (BNR) Biodiversity and Natural Resources (BNR) > Agriculture, Forestry, and Ecosystem Services (AFE) Biodiversity and Natural Resources (BNR) > Integrated Biosphere Futures (IBF)
Depositing User:	Luke Kirwan
Date Deposited:	12 Apr 2024 11:51
Last Modified:	12 Apr 2024 11:51
URI:	https://pure.iiasa.ac.at/19612

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