Anthropogenic perturbation of the carbon fluxes from land to ocean

Regnier, Pierre, Friedlingstein, Pierre, Ciais, Philippe, Mackenzie, Fred T., Gruber, Nicolas, Janssens, Ivan A., Laruelle, Goulven G., Lauerwald, Ronny, Luyssaert, Sebastiaan, Andersson, Andreas J., Arndt, Sandra, Arnosti, Carol, Borges, Alberto V., Dale, Andrew W., Gallego-Sala, Angela, Goddéris, Yves, Goossens, Nicolas, Hartmann, Jens, Heinze, Christoph, Ilyina, Tatiana, Joos, Fortunat, LaRowe, Douglas E., Leifeld, Jens, Meysman, Filip J. R., Munhoven, Guy, Raymond, Peter A., Spahni, Renato, Suntharalingam, Parvadha and Thullner, Martin (2013) Anthropogenic perturbation of the carbon fluxes from land to ocean Nature Geoscience, 6 (8). pp. 597-607. DOI 10.1038/ngeo1830.

[img] Text
ngeo1830.pdf - Published Version
Restricted to Registered users only

Download (999Kb) | Contact
[img] Text (Supplementary Note and Supplementary Table)
ngeo1830-s1.pdf - Supplemental Material
Restricted to Registered users only

Download (369Kb) | Contact

Supplementary data:

Abstract

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.

Document Type: Article
Additional Information: WOS:000322441900008
Keywords: global carbon budget
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1038/ngeo1830
ISSN: 1752-0894
Projects: GEOCARBON, Future Ocean
Date Deposited: 31 Jul 2013 11:24
Last Modified: 20 Feb 2017 14:27
URI: http://eprints.uni-kiel.de/id/eprint/21888

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...