CO2 deposition over the multi-year ice of the western Weddell Sea

[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 :

Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others

Author, co-author :

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.

Language :

English

Title :

CO2 deposition over the multi-year ice of the western Weddell Sea

Publication date :

13 July 2006

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

Amer Geophysical Union, Washington, United States - Washington

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Name of the research project :

Belcanto

Funders :

UE - Union Européenne [BE]
NERC - Natural Environment Research Council [GB]
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique

Commentary :

Available on ORBi :

since 05 December 2008

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Bibliography

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