Cristin-resultat-ID: 1040007
Sist endret: 13. februar 2014 11:43
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig oversiktsartikkel/review
2013

Anthropogenic perturbation of the carbon fluxes from land to ocean

Bidragsytere:
  • Pierre Regnier
  • Pierre Friedlingstein
  • Philippe Ciais
  • Fred T. Mackenzie
  • Nicolas Gruber
  • Ivan A. Janssens
  • mfl.

Tidsskrift

Nature Geoscience
ISSN 1752-0894
e-ISSN 1752-0908
NVI-nivå 2

Om resultatet

Vitenskapelig oversiktsartikkel/review
Publiseringsår: 2013
Publisert online: 2013
Volum: 6
Hefte: 8
Sider: 597 - 607

Importkilder

Isi-ID: 000322441900008

Klassifisering

Vitenskapsdisipliner

Oseanografi

Beskrivelse Beskrivelse

Tittel

Anthropogenic perturbation of the carbon fluxes from land to ocean

Sammendrag

A substantial amount of the atmospheric carbon taken up on land through photosynthesis and chemical weathering is transported laterally along the aquatic continuum from upland terrestrial ecosystems to the ocean. So far, global carbon budget estimates have implicitly assumed that the transformation and lateral transport of carbon along this aquatic continuum has remained unchanged since pre-industrial times. A synthesis of published work reveals the magnitude of present-day lateral carbon fluxes from land to ocean, and the extent to which human activities have altered these fluxes. We show that anthropogenic perturbation may have increased the flux of carbon to inland waters by as much as 1.0 Pg C yr-1 since pre-industrial times, mainly owing to enhanced carbon export from soils. Most of this additional carbon input to upstream rivers is either emitted back to the atmosphere as carbon dioxide (~0.4 Pg C yr-1) or sequestered in sediments (~0.5 Pg C yr-1) along the continuum of freshwater bodies, estuaries and coastal waters, leaving only a perturbation carbon input of ~0.1 Pg C yr-1 to the open ocean. According to our analysis, terrestrial ecosystems store ~0.9 Pg C yr-1 at present, which is in agreement with results from forest inventories but significantly differs from the figure of 1.5 Pg C yr-1 previously estimated when ignoring changes in lateral carbon fluxes. We suggest that carbon fluxes along the land–ocean aquatic continuum need to be included in global carbon dioxide budgets.

Bidragsytere

Pierre Regnier

  • Tilknyttet:
    Forfatter
    ved Université libre de Bruxelles

Pierre Friedlingstein

  • Tilknyttet:
    Forfatter
    ved University of Exeter

Philippe Ciais

  • Tilknyttet:
    Forfatter
    ved Laboratoire des Sciences du Climat et de l'Environnement

Fred T. Mackenzie

  • Tilknyttet:
    Forfatter
    ved University of Hawai‘i at Mānoa

Nicolas Gruber

  • Tilknyttet:
    Forfatter
    ved Eidgenössische Technische Hochschule Zürich
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