Historical porosity data in polar firn

Autor: Vladimir Ya. Lipenkov, Kévin Fourteau, David Etheridge, Xavier Faïn, Laurent Arnaud, Jean-Marc Barnola, Patricia Martinerie
Přispěvatelé: Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Earth System Science Data, Vol 12, Pp 1171-1177 (2020)
Earth System Science Data
Earth System Science Data, Copernicus Publications, 2020, 12 (2), pp.1171-1177. ⟨10.5194/essd-12-1171-2020⟩
Earth System Science Data, 2020, 12 (2), pp.1171-1177. ⟨10.5194/essd-12-1171-2020⟩
ISSN: 1866-3516
1866-3508
DOI: 10.5194/essd-12-1171-2020⟩
Popis: In the 1990s, closed and open porosity volumes of firn samples were measured by J.-M. Barnola using the technique of gas pycnometry, on firn from three different polar sites. They are the basis of a parameterization of closed porosity in polar firn, first introduced in Goujon et al. (2003) and used in several firn physics models (e.g., Buizert et al., 2012). However, these data and their processing have not been published in their own right yet. In this short article, we detail how they were processed by J.-M. Barnola and how the closed porosity parameterization was obtained. We show that the original data processing only partially accounts for the presence of reopened bubbles in the samples. Since the proper correction to apply for this effect is hard to estimate, we also processed the data without including a correction for reopened bubbles. Finally, we made these pycnometry data available in order to be used by the glaciology community, notably for the study of polar ice formation and of the composition of gas records in ice cores. They are hosted on the PANGAEA database: https://doi.org/10.1594/PANGAEA.907678 (Fourteau et al., 2019a).
Databáze: OpenAIRE
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