Towards a method for high vertical resolution measurements of the partial pressure of CO2 within bulk sea ice

[en] Fluxes of atmospheric CO2 have been reported over sea ice during winter and spring. These fluxes are partly driven by the gradient of the CO2 concentration between sea ice and the atmosphere. We present a new non-destructive method to measure the pCO2 of bulk sea ice at its in situ temperature. This method is based on an equilibration procedure between sea ice and a standard gas of known CO2 concentration. The concentration is measured by gas chromatography with a precision of 5%. Tests were performed on artificial standard sea ice and confirmed the reproducibility of the technique in the range of precision of the gas chromatograph. To test the accuracy of this method, the first profiles of pCO2 measured in bulk sea ice are reported and compared with direct in situ measurements of brine pCO2 over depth-integrated intervals.

Research Center/Unit :

Unité d'Océanographie Chimique

Disciplines :

Earth sciences & physical geography

Author, co-author :

Geilfus, Nicolas-Xavier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique

Delille, Bruno ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique

Verbeke, Véronique

Tsion, Jean-Louis

Language :

English

Title :

Towards a method for high vertical resolution measurements of the partial pressure of CO2 within bulk sea ice

Publication date :

2012

Journal title :

Journal of Glaciology

ISSN :

0022-1430

eISSN :

1727-5652

Publisher :

International Glaciological Society, United Kingdom

Volume :

Issue :

208

Pages :

287-300

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.igsoc.org/journal/58/208/

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique
FWB - Fédération Wallonie-Bruxelles

Available on ORBi :

since 26 July 2012

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