In-phase millennial-scale glacier changes in the tropics and North Atlantic regions during the Holocene.

Autor: Jomelli V; LGP UMR 8591 CNRS Paris 1 Panthéon-Sorbonne University CNRS, 92195, Meudon, France. jomelli@cerege.fr.; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France. jomelli@cerege.fr., Swingedouw D; Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR CNRS 5805, EPOC-OASU Université de Bordeaux, Allée Geoffroy Saint‑Hilaire, 33615, Pessac, France., Vuille M; Department of Atmospheric & Environmental Sciences, University at Albany, State University of New York, Albany, NY, 12222, USA., Favier V; Université Grenoble Alpes, CNRS, IRD, G-INP, Institut des Geosciences de l'Environnement (IGE), F38000, Grenoble, France., Goehring B; Department of Earth and Environmental Sciences, Tulane University, 6823 St Charles Ave, New Orleans, LA, 70118, USA., Shakun J; Department of Earth & Environmental Sciences Boston College, Chestnut Hill, MA, 02467, USA., Braucher R; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France., Schimmelpfennig I; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France., Menviel L; Climate Change Research Centre, Centre of Excellence, University of New South Wales, Sydney, NSW, 2052, Australia., Rabatel A; Université Grenoble Alpes, CNRS, IRD, G-INP, Institut des Geosciences de l'Environnement (IGE), F38000, Grenoble, France., Martin LCP; CRPG, UMR 7358, CNRS, Université de Lorraine, 54500, Vandœuvre-lès-Nancy, France.; Department of Physical Geography, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands., Blard PH; CRPG, UMR 7358, CNRS, Université de Lorraine, 54500, Vandœuvre-lès-Nancy, France.; Laboratoire de Glaciologie, DGES-IGEOS, Université Libre de Bruxelles, 1050, Bruxelles, Belgium., Condom T; Université Grenoble Alpes, CNRS, IRD, G-INP, Institut des Geosciences de l'Environnement (IGE), F38000, Grenoble, France., Lupker M; Department of Earth Sciences, ETH Zürich, 8092, Zürich, Switzerland., Christl M; Laboratory of Ion Beam Physics, ETH Zürich, 8093, Zürich, Switzerland., He Z; Department of Atmospheric & Environmental Sciences, University at Albany, State University of New York, Albany, NY, 12222, USA., Verfaillie D; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France.; Georges Lemaître Centre for Earth and Climate Research, 1348, Louvain-la-Neuve, Belgium., Gorin A; Department of Earth & Environmental Sciences Boston College, Chestnut Hill, MA, 02467, USA., Aumaître G; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France., Bourlès DL; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France., Keddadouche K; Aix-Marseille University, CNRS, IRD, Coll. France, INRAE, CEREGE, 13545, Aix-en-Provence, France.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Mar 17; Vol. 13 (1), pp. 1419. Date of Electronic Publication: 2022 Mar 17.
DOI: 10.1038/s41467-022-28939-9
Abstrakt: Based on new and published cosmic-ray exposure chronologies, we show that glacier extent in the tropical Andes and the north Atlantic regions (TANAR) varied in-phase on millennial timescales during the Holocene, distinct from other regions. Glaciers experienced an early Holocene maximum extent, followed by a strong mid-Holocene retreat and a re-advance in the late Holocene. We further explore the potential forcing of TANAR glacier variations using transient climate simulations. Since the Atlantic Meridional Overturning Circulation (AMOC) evolution is poorly represented in these transient simulations, we develop a semi-empirical model to estimate the "AMOC-corrected" temperature and precipitation footprint at regional scales. We show that variations in the AMOC strength during the Holocene are consistent with the observed glacier changes. Our findings highlight the need to better constrain past AMOC behavior, as it may be an important driver of TANAR glacier variations during the Holocene, superimposed on other forcing mechanisms.
(© 2022. The Author(s).)
Databáze: MEDLINE
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