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  Towards an understanding of the controls on δO2/N2 variability in ice core records

Harris Stuart, R., Landais, A., Martinerie, P., Dumont, M., Libois, Q., Orsi, A., Grisart, A., Prié, F., Buizert, C., Severinghaus, J. (2023): Towards an understanding of the controls on δO2/N2 variability in ice core records, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4430

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021860 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021860_1
Genre: Conference Paper

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 Creators:
Harris Stuart, Romilly1, Author
Landais, Amaëlle1, Author
Martinerie, Patricia1, Author
Dumont, Marie1, Author
Libois, Quentin1, Author
Orsi, Anaïs1, Author
Grisart, Antoine1, Author
Prié, Frédéric1, Author
Buizert, Christo1, Author
Severinghaus, Jeffery1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Processes controlling pore closure are broadly understood yet defining the physical mechanisms driving elemental fractionation remains ambiguous. It has indeed been shown that the pore closure processes lead to a decrease of concentration of small size molecules (e.g. O2, Ar, Ne) in the bubbles. Moreover, ice core δO2/N2 records shows a clear link with local summer solstice insolation and hence makes it a powerful dating tool. However, investigations towards a mechanistic understanding of δO2/N2 and summer solstice insolation suggests local climatic conditions may also be important. We compiled δO2/N2records from several polar ice cores and found a link between δO2/N2 and temperature and/or accumulation rate, in addition to the influence of the summer solstice insolation intensity. Using the Crocus snowpack model, we carry out sensitivity tests to identify the response of near-surface snow properties to changes in insolation, accumulation rate and air temperature.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-4430
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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