Cited by 127Soil Carbon and Nitrogen DynamicsSoil erosion and sediment transportCO2 Sequestration and Geologic Interactions

Agricultural acceleration of soil carbonate weathering

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Kim, John H., Jobbágy, Esteban G., Richter, Daniel D., Trumbore, Susan E., Jackson, Robert B.·2020·Global Change Biology

Abstract

Abstract Soil carbonates (i.e., soil inorganic carbon or SIC) represent more than a quarter of the terrestrial carbon pool and are often considered to be relatively stable, with fluxes significant only on geologic timescales. However, given the importance of climatic water balance on SIC accumulation, we tested the hypothesis that increased soil water storage and transport resulting from cultivation may enhance dissolution of SIC, altering their local stock at decadal timescales. We compared SIC storage to 7.3 m depth in eight sites, each having paired plots of native vegetation and rain‐fed croplands, and half the sites having additional irrigated cropland plots. Rain‐fed and irrigated croplands had 328 and 730 Mg C/ha less SIC storage, respectively, compared to their native vegetation (grassland or woodland) pairs, and irrigated croplands had 402 Mg C/ha less than their rain‐fed pairs (p < .0001). SIC contents were negatively correlated with estimated groundwater recharge, suggesting that dissolution and leaching may be responsible for SIC losses observed. Under croplands, the remaining SIC had more modern radiocarbon and a δ13C composition that was closer to crop inputs than under native vegetation, suggesting that cultivation has led to faster turnover and incorporation of recent crop carbon into the SIC pool (p < .0001). The losses occurred just 30–100 years after land‐use changes, indicating SIC stocks that were stable for millennia can rapidly adjust to increased soil water flows. Large SIC losses (194–242 Mg C/ha) also occurred below 4.9 m deep under irrigated croplands, with SIC losses lagging behind the downward‐advancing wetting front by ~30 years, suggesting that even deep SIC were affected. These observations suggest that the vertical distribution of SIC in dry ecosystems is dynamic on decadal timescales, highlighting its potential role as a carbon sink or source to be examined in the context of land use and climate change.

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  • Soil erosion generates CO2 and subsequent carbonation reaction with water releases carbonate or bicarbonate ions.

    “Hence, soil erosion results in the generation of carbon dioxide (CO2) and subsequent carbonation reaction with water releases carbonate or bicarbonate ions [31-33].”

    From Advanced Oxidation Processes for Degradation of Water Pollutants—Ambivalent Impact of Carbonate Species: A Review (2023) · cites this paper as [33]

    The Introduction (page not provided) says that CO2 dissolving in water produces bicarbonate ions. It does not say that soil erosion generates the CO2 or causes this sequence; its discussion of CO2 release concerns carbonate reactions and acidification instead. (LLM, conf=0.85)

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5 of the 91 references couldn’t be matched to a known paper.

Research works printed but not linked: 5

  1. Birkeland, P. W. (1999). Soils and geomophology. New York: Oxford University Press.
  2. 60025x · DOI
  3. 60038x · DOI
  4. 10003x · DOI
  5. 6541121x · DOI

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Authors
Kim, J. H., Jobbágy, E. G., Richter, D. D., Trumbore, S. E., & Jackson, R. B.
Affiliations
  • Max Planck Institute for Biogeochemistry (DE)
  • Grupo de Estudios Ambientales IMASL Universidad Nacional de San Luis/CONICET San Luis Argentina
  • Duke University (US)
  • Stanford University (US)
Corresponding author
Kim, John H.
Venue
Global Change Biology
Publisher
Wiley
Published
2020-07-26
Volume
26
Issue
10
Pages
5988-6002
ISSN
  • 1354-1013 (ISSN-L)
  • 1365-2486
OpenAlex
W3032896633
Cited by
127
References
91
Citations by year
2026: 24 · 2025: 24 · 2024: 17 · 2023: 20 · 2022: 30 · 2021: 8 · 2020: 4
FWCI
10.26
Type
journal article
Language
en
Open access
Locations
  • Global Change Biology (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Conicet (submittedVersion, cc-by)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • Greater South Information System
Funders
  • National Science Foundation (DDIG #0910294, DEB #0717191, GRFP #2006044266, IOS #0920355)
  • FP7 People: Marie-Curie Actions (FP7‐PEOPLE‐2013‐IEF‐626334)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
  • Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
Keywords
soil inorganic carbon, carbonate weathering, soil carbon storage, land use change, cropland, irrigation, groundwater recharge, wetting front, carbon-14, stable carbon isotopes, carbon turnover, arid ecosystems, carbon sinks and sources, decadal timescales
MeSH terms
Acceleration, Agriculture, Carbon, Carbonates, Soil, Ecosystem

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