The DOI matches its Crossref record; 102 of the 102 references it cites were found in a registry or an index.
The land-to-ocean loops of the global carbon cycle
Open accessAbstract
Carbon storage by the ocean and by the land is usually quantified separately, and does not fully take into account the land-to-ocean transport of carbon through inland waters, estuaries, tidal wetlands and continental shelf waters—the ‘land-to-ocean aquatic continuum’ (LOAC). Here we assess LOAC carbon cycling before the industrial period and perturbed by direct human interventions, including climate change. In our view of the global carbon cycle, the traditional ‘long-range loop’, which carries carbon from terrestrial ecosystems to the open ocean through rivers, is reinforced by two ‘short-range loops’ that carry carbon from terrestrial ecosystems to inland waters and from tidal wetlands to the open ocean. Using a mass-balance approach, we find that the pre-industrial uptake of atmospheric carbon dioxide by terrestrial ecosystems transferred to the ocean and outgassed back to the atmosphere amounts to 0.65 ± 0.30 petagrams of carbon per year (±2 sigma). Humans have accelerated the cycling of carbon between terrestrial ecosystems, inland waters and the atmosphere, and decreased the uptake of atmospheric carbon dioxide from tidal wetlands and submerged vegetation. Ignoring these changing LOAC carbon fluxes results in an overestimation of carbon storage in terrestrial ecosystems by 0.6 ± 0.4 petagrams of carbon per year, and an underestimation of sedimentary and oceanic carbon storage. We identify knowledge gaps that are key to reduce uncertainties in future assessments of LOAC fluxes. An assessment of the land-to-ocean cycling of carbon through inland waters, estuaries, tidal wetlands and continental shelf waters provides a perspective on the global carbon cycle and identifies key knowledge gaps.
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Cites
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Cited by
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Self-citationRiver ecosystem metabolism and carbon biogeochemistry in a changing world
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Self-citationFates of Terrigenous Dissolved Organic Carbon in the Gulf of Maine
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Quantified Carbon Dioxide Removal from an Alkalinity Addition Field Trial in the Kvina River, Norway
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Metadata
- Authors
- Regnier, P., Resplandy, L., Najjar, R. G., & Ciais, P.
- Venue
- Nature
- Published
- 2022-03-16
- Volume
- 603
- Issue
- 7901
- Pages
- 401-410
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W4220774684
- Cited by
- 688
- References
- 102
- FWCI
- 64.90
- Type
- journal article
- Language
- en
- Open access
- green
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