[en] Field measurements by eddy correlation (EC) indicate an average uptake of 0.6 g CO2 m(-2) d(-1) by the ice-covered western Weddell Sea in December 2004. At the same time, snow that covers ice floes of the western Weddell Sea becomes undersaturated with CO2 relative to the atmosphere during early summer. Gradients of CO2 from the ice to the atmosphere do not support significant diffusive fluxes and are not strong enough to explain the observed CO2 deposition. We hypothesize that the transport of air through the snow pack is controlled by turbulence and that undersaturation of CO2 is caused by biological productivity at the ice-snow and snow-atmosphere interface. The total carbon uptake by the multi-year ice zone of the western Weddell Sea in December could have been as high as 6.6 Tg C y(-1).
Disciplines :
Physique, chimie, mathématiques & sciences de la terre: Multidisciplinaire, généralités & autres
Auteur, co-auteur :
Zemmelink, H. J.
Delille, Bruno ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Tison, Jean-Louis
Hintsa, E. J.
Houghton, L.
Dacey, J. W. H.
Langue du document :
Anglais
Titre :
CO2 deposition over the multi-year ice of the western Weddell Sea
Date de publication/diffusion :
13 juillet 2006
Titre du périodique :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Maison d'édition :
Amer Geophysical Union, Washington, Etats-Unis - Washington
Volume/Tome :
33
Fascicule/Saison :
13
Peer reviewed :
Peer reviewed vérifié par ORBi
Intitulé du projet de recherche :
Belcanto
Organisme subsidiant :
UE - Union Européenne NERC - Natural Environment Research Council BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Commentaire :
An edited version of this paper was published by AGU. Copyright 2006 American Geophysical Union
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