The importance of inorganic carbon in soil carbon databases and stock estimates: A case study from England
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Abstract Many national and regional databases of soil properties and associated estimates of soil carbon stock consider organic, but not inorganic carbon (IC). Any future change in soil carbon stock resulting from the formation of pedogenic carbonates will be difficult to set in context because historical measurements or estimates of IC concentration and stock may not be available. In their article describing a database of soil carbon for the United Kingdom published in this journal, vol. 21, 363–369] only consider data for organic carbon (OC), despite the occurrence of IC‐bearing calcareous soils across a substantial part of southern England. Robust techniques are required for establishing IC concentrations and stocks based on available data. We present linear regression models ( R 2 between 0.8 and 0.88) to estimate IC in topsoil based on total Ca and Al concentrations for soils over two groups of primary, carbonate‐bearing parent materials across parts of southern and eastern England. By applying the regression models to geochemical survey data across the entire area (18 165 km 2 ), we estimate IC concentrations on a regular 500‐m grid by ordinary kriging. Using bulk density data from across the region, we estimate the total IC stock of soil (0–30 cm depth) in this area to be 186 MtC. This represents 15.5 and 5.5% of the estimated total soil carbon stock (OC plus IC) across England and the UK, respectively, based on the data presented by vol. 21, 363–369]. Soil geochemical data could be useful for estimating primary IC stocks in other parts of the world.
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Limited information is available for the formation of pedogenic carbonates in U.K. soils.
“Limited information is available for the formation of pedogenic carbonates in U.K. soils, with Rawlins 10 estimating the total inorganic carbon stock of soil (0-30 cm depth) to be 186 Mt of C, around 5.5% of the estimated total soil carbon stock (organic and inorganic) across the U.K.”
From Rapid Removal of Atmospheric CO2 by Urban Soils (2015) · cites this paper as [10]
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- Authors
- Rawlins, B. G., Henrys, P., Breward, N., Robinson, D. A., Keith, A. M., & Garcia‐Bajo, M.
- Affiliations
- British Geological Survey (GB)
- UK Centre for Ecology & Hydrology (GB)
- Corresponding author
- Rawlins, B. G.
- Venue
- Soil Use and Management
- Publisher
- Wiley
- Published
- 2011-05-13
- Volume
- 27
- Issue
- 3
- Pages
- 312-320
- ISSN
- 0266-0032 (ISSN-L)
- 1475-2743
- OpenAlex
- W2107757676
- Cited by
- 60
- References
- 27
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 4 · 2023: 2 · 2022: 5 · 2020: 4 · 2019: 3 · 2018: 7 · 2017: 5 · 2016: 6 · 2015: 7 · 2014: 2 · 2013: 5 · 2012: 3
- FWCI
- 4.98
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Soil Use and Management (publishedVersion)
- NERC Open Research Archive (Natural Environment Research Council) (acceptedVersion)
- Funders
- British Geological Survey
- Natural Environment Research Council (bgs05002)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Environmental Engineering › Soil Geostatistics and Mapping
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil and Environmental Studies
- Keywords
- inorganic carbon, soil carbon stocks, pedogenic carbonates, calcareous soils, soil organic carbon, total calcium, bulk density, kriging, regression models, southern England, United Kingdom
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