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(Article of periodic en Anglais - 2013)

Document title

New estimates of permafrost evolution during the last 21 kyears in Eurasia using numerical modelling

published at : The 50th Anniversary of the First International Conference on Permafrost and Beyond

Authors(s) and Affiliation(s)

KITOVER D.C. (1) ; VAN BALEN R.T. (1) ; ROCHE D.M. (1) ; VANDENBERGHE J. (1) ; RENSSEN H. (1) ;
(1) Dept. of Earth Sciences, VU Univ., Amsterdam, PAYS-BAS

Abstract

The evolution of past permafrost since the Last Glacial Maximum (LGM) is simulated using the Vrije Universiteit Amsterdam Permafrost (VAMPER) model. This method is different from a proxy-based approach which translates reconstructed air temperatures to estimate past permafrost extent and thickness. First, a sensitivity analysis was performed to assess the behaviour of the model. Then 5 case studies within Eurasia were performed using mean annual ground surface temperatures derived from an Earth system model as the surface forcing. In Central and West Siberia, the simulated LGM permafrost thicknesses agree well with previous estimates. The LGM and present-day estimates for South Russia are underestimated, which is likely due to a highly simplified land-atmosphere coupling. In West and Central Europe, however, the VAMPER model was not able to produce permafrost during LGM conditions, which is due to previously recognised biases of the Earth system model

Source

Thematical fascicle

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2013, vol. 24, no 4 [pp. 286-303]

Bibliographic references : 3 p.

Collation : fig., tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1787

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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