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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Volume 13, issue 7
Clim. Past, 13, 833-853, 2017
https://doi.org/10.5194/cp-13-833-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Clim. Past, 13, 833-853, 2017
https://doi.org/10.5194/cp-13-833-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 13 Jul 2017

Research article | 13 Jul 2017

Modelling firn thickness evolution during the last deglaciation: constraints on sensitivity to temperature and impurities

Camille Bréant et al.
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Cited articles  
Alley, R. B.: Firn densification by grain-boundary sliding: a first model, J. Phys. Colloq., 48, C1-249–C1-256, https://doi.org/10.1051/jphyscol:1987135, 1987.
Altnau, S., Schlosser, E., Isaksson, E., and Divine, D.: Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica, The Cryosphere, 9, 925–944, https://doi.org/10.5194/tc-9-925-2015, 2015.
Anderson, D. L. and Benson, C. S.: The densification and diagenesis of snow, in Ice and Snow: Properties, Processes and Applications, pp. 391–411, MIT Press., 1963.
Arnaud, L.: Modélisation de la transformation de la neige en glace à la surface des calottes polaires; Etude du transport des gaz dans ces milieux poreux, PhD Thesis, Université Joseph Fournier – Grenoble 1, 294 pp., 1997.
Arnaud, L., Barnola, J. M., and Duval, P.: Physical modeling of the densification of snow/firn and ice in, Phys. Ice Core Rec., 26, 39–44, 2000.
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All firn densification models applied to deglaciations show a large disagreement with δ15N measurements at sites in East Antarctica, predicting larger firn thickness during the Last Glacial Maximum, whereas δ15N suggests a reduced firn thickness compared to the Holocene. Here we present modifications, which significantly reduce the model–data mismatch for the gas trapping depth evolution over the last deglaciation at the coldest sites in East Antarctica, to the LGGE firn densification model.
All firn densification models applied to deglaciations show a large disagreement with δ15N...
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