Open Marien Archief | Vlaams Instituut voor de Zee

Vlaams Instituut voor de Zee

Platform voor marien onderzoek


Open Marien Archief

Het Open Marien Archief van België (OMA) biedt vrije toegang tot de digitale publicaties over de Vlaamse kust en het Belgisch deel van de Noordzee, en alle andere mariene, estuariene en kustgebonden publicaties van Belgische auteurs en wetenschappers en van buitenlandse wetenschappers geaffilieerd aan een Belgische instelling.

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CO2 measurements in sea ice
Geilfus, N.-X.; Delille, B.; Verbeke, V.; Tison, J.-L. (2007). CO2 measurements in sea ice, in: Mees, J. et al. (Ed.) (2007). VLIZ Young Scientists' Day, Brugge, Belgium 2 March 2007: book of abstracts. VLIZ Special Publication, 39: pp. 36
In: Mees, J.; Seys, J. (Ed.) (2007). VLIZ Young Scientists' Day, Brugge, Belgium 2 March 2007: book of abstracts. VLIZ Special Publication, 39. Vlaams Instituut voor de Zee (VLIZ): Oostende. IX, 82 pp., meer
In: VLIZ Special Publication. Vlaams Instituut voor de Zee (VLIZ): Oostende. ISSN 1377-0950, meer

Beschikbaar in Auteurs 
Documenttypes: Congresbijdrage; Samenvatting

    Koolmonoxide; Meting; Zee-ijs; Marien

Auteurs  Top 
  • Geilfus, N.-X.
  • Delille, B., meer
  • Verbeke, V.
  • Tison, J.-L., meer

    The impact of sea ice on the interactions between the atmosphere, the ocean and the biosphere is well known in the polar area. However, sea ice has been assumed to be an impermeable and inert barrier to air sea exchange. But Golden et al. (1998) showed that sea ice is a highly permeable medium for gases under some conditions (T= -5°C, Salinity = 5). Accordingly, uptake of atmospheric CO2 over the sea ice cover in the Arctic and Southern Ocean were recently reported. Data on gas composition in sea ice are scarce and analytical methods are thought to be sensitive to CO2 contamination in relation with carbonates system in the brines of sea ice. A new analytical method has been tested on experimental abiotic sea ice. It consists in equilibrating sea ice with a standard atmosphere (Verbeke, 2005). These measurements were carried out at different temperatures in order to follow the carbonates system displacement in bulk sea ice. When temperatures increase, the partial pressure of CO2 (pCO2) remains stable up to a temperature threshold and then decreases down to values below to pCO2 of the standard atmosphere. This can mainly be explained by the dilution of brine during the increase of temperatures. Pure ice crystals melt and lead to the dilution of brine and related decrease of pCO2.

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