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A new perspective on permafrost boundaries in France during the Last Glacial Maximum

Stadelmaier, Kim H.; Ludwig, Patrick ORCID iD icon; Bertran, Pascal; Antoine, Pierre; Shi, Xiaoxu; Lohmann, Gerrit; Pinto, Joaquim G.


During the Last Glacial Maximum (LGM), a very cold and dry period around 26.5–19 kyr BP, permafrost was widespread across Europe. In this work, we explore the possible benefit of using regional climate model data to improve the permafrost representation in France, decipher how the atmospheric circulation affects the permafrost boundaries in the models, and test the role of ground thermal contraction cracking in edge development during the LGM. With these aims, criteria for possible thermal contraction cracking of the ground are applied to climate model data for the first time. Our results show that the permafrost extent and ground cracking regions deviate from proxy evidence when the simulated large-scale circulation in both global and re-gional climate models favours prevailing westerly winds. A colder and, with regard to proxy data, more realistic version of the LGM climate is achieved given more frequent easterly winds conditions. Given the appropriate forcing, an added value of the regional climate model simulation can be achieved in representing permafrost and ground thermal contraction cracking. Furthermore, the model data provide evidence that thermal contraction cracking occurred in Europe during the LGM in a wide latitudinal band south of the probable permafrost border, in agreement with field data analysis. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000141303
Veröffentlicht am 17.12.2021
DOI: 10.5194/cp-17-2559-2021
Zitationen: 9
Web of Science
Zitationen: 7
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Forschungsbereich Troposphäre (IMK-TRO)
Institut für Meteorologie und Klimaforschung (IMK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1814-9332
KITopen-ID: 1000141303
HGF-Programm 12.11.33 (POF IV, LK 01) Regional Climate and Hydrological Cycle
Erschienen in Climate of the past
Verlag Copernicus Publications
Band 17
Heft 6
Seiten 2559–2576
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 10.12.2021
Nachgewiesen in Web of Science
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