Global carbon dioxide emissions from inland waters - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Nature Année : 2013

Global carbon dioxide emissions from inland waters

Jens Hartmann
  • Fonction : Auteur
Ronny Lauerwald
  • Fonction : Auteur
  • PersonId : 1207474
  • IdHAL : lauerwald
Sebastian Sobek
  • Fonction : Auteur
Cory Mcdonald
  • Fonction : Auteur
Mark Hoover
  • Fonction : Auteur
David Butman
  • Fonction : Auteur
Robert Striegl
  • Fonction : Auteur
Emilio Mayorga
  • Fonction : Auteur
  • PersonId : 966354
Christoph Humborg
  • Fonction : Auteur
Pirkko Kortelainen
  • Fonction : Auteur
Hans Duerr
  • Fonction : Auteur
Peter Guth
  • Fonction : Auteur

Résumé

Carbon dioxide (CO2) transfer from inland waters to the atmosphere, known as CO2 evasion, is a component of the global carbon cycle. Global estimates of CO2 evasion have been hampered, however, by the lack of a framework for estimating the inland water surface area and gas transfer velocity and by the absence of a global CO2 database. Here we report regional variations in global inland water surface area, dissolved CO2 and gas transfer velocity. We obtain global CO2 evasion rates of 1.8(-0.25)(+0.25) petagrams of carbon (Pg C) per year from streams and rivers and 0.32(-0.26)(+0.52) Pg C yr(-1) from lakes and reservoirs, where the upper and lower limits are respectively the 5th and 95th confidence interval percentiles. The resulting global evasion rate of 2.1 Pg C yr(-1) is higher than previous estimates owing to a larger stream and river evasion rate. Our analysis predicts global hotspots in stream and river evasion, with about 70 per cent of the flux occurring over just 20 per cent of the land surface. The source of inland water CO2 is still not known with certainty and new studies are needed to research the mechanisms controlling CO2 evasion globally.

Dates et versions

hal-01194582 , version 1 (07-09-2015)

Identifiants

Citer

Peter A. Raymond, Jens Hartmann, Ronny Lauerwald, Sebastian Sobek, Cory Mcdonald, et al.. Global carbon dioxide emissions from inland waters. Nature, 2013, 503 (7476), pp.355-359. ⟨10.1038/nature12760⟩. ⟨hal-01194582⟩
748 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More