Mountain glacier fluctuations during the Lateglacial and Holocene on Clavering Island (northeastern Greenland) from 10 Be moraine dating

• Published in: Boreas
• Main Authors: Biette, Melody, Jomelli, Vincent, Chenet, Marie, Braucher, Regis, Rinterknecht, Vincent, Lane, Timothy, Aster, Team
• Other Authors: Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Université Paris 1 Panthéon-Sorbonne (UP1), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), DEES, University of St Andrews Scotland, Liverpool John Moores University (LJMU), European Project: 262693,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2010-1,INTERACT(2011), European Project: 730938,INTERACT
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics; [SDE.MCG]Environmental Sciences/Global Changes; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology; Greenland; Arctic; Clavering Island; glacier; greenlandic
• Online Access: https://hal.science/hal-02923458; https://hal.science/hal-02923458/document; https://hal.science/hal-02923458/file/Mountain%20glacier%20fluctuations%20during%20the%20Lateglacial%20and%20Holocene%20on%20Clavering%20Island%20%28northeastern%20Greenland%29%20from%2010Be%20moraine%20dating.pdf; https://doi.org/10.1111/bor.12460

International audience Despite an increasing interest in Greenlandic mountain glaciers over recent decades, their evolution during theLateglacialandHolocenestillneedstobebetterconstrained.Herewepresent2510Becosmic-rayexposure(CRE)agesof boulders collected on moraines from three glaciers located on Clavering Island (northeastern Greenland). CREages span16.290.79to 0.370.05ka andrevealthree periodsof moraineformationduringthe Lateglacial,theEarlyand the Late Holocene. Data show a multi-modal distribution of the ages during the Lateglacial with exposure agesspanning from 16.290.79 to 12.311.3 ka. At least two glaciers experienced a greater expansion at the beginning ofthe Holocene than at the end of the Holocene, dated to 11.30.3 and 10.80.6 ka, respectively. At the end of theHolocene, glacial advances occurred during the Dark Ages Cold Period and during the Little Ice Age (LIA),synchronous with glacial advances documented in nearby lake sediments. This new CRE chronology highlights thatthe LIA extent is not the largest glacier advance in the Late Holocene in Clavering Island. This broadly correspondswithothermountainglaciersofwesternandnorthernGreenland,anddoesnotappeartoreflectnorthernhighlatitudesummer insolation that would suggest progressive temperature decrease, but instead mimics recent regionalcontinental temperature reconstructions that show a long term warming driven by different forcing.