ORBi: Geilfus Nicolas-Xavier - Towards a method for high vertical resolution measurements of the partial pressure of CO2 within bulk sea ice

Reference : Towards a method for high vertical resolution measurements of the partial pressure of CO...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	To cite this reference:	http://hdl.handle.net/2268/127972

Title :	Towards a method for high vertical resolution measurements of the partial pressure of CO2 within bulk sea ice
Language :	English
Author, co-author :	Geilfus, Nicolas-Xavier [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
	Delille, Bruno [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
	Verbeke, Véronique [> >]
	Tsion, Jean-Louis [> >]
Publication date :	2012
Journal title :	Journal of Glaciology
Volume :	58
Issue/season :	208
Pages :	287-300
Audience :	International
ISSN :	0022-1430
Abstract :	[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 units :	Unité d'Océanographie Chimique
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Communauté française de Belgique - CfB
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/127972
DOI :	10.3189/2012JoG11J071
Other URL :	http://www.igsoc.org/journal/58/208/

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