FN Archimer Export Format PT J TI Nonlinear forcing of climate on mountain denudation during glaciations BT AF Mariotti, Apolline Blard, Pierre-Henri Charreau, Julien Toucanne, Samuel Jorry, Stephan Molliex, Stéphane Bourlès, Didier L. Aumaître, Georges Keddadouche, Karim AS 1:1;2:1,2;3:1;4:3;5:3;6:1,4;7:5;8:5;9:5; FF 1:;2:;3:;4:PDG-REM-GM-LGS;5:PDG-REM-GM-LGS;6:;7:;8:;9:; C1 CNRS, Université de Lorraine, CRPG, Nancy, France Laboratoire de Glaciologie, DGES-IGEOS, Université Libre de Bruxelles, Bruxelles, Belgium IFREMER, Laboratoire Géodynamique et Enregistrement Sédimentaire, Plouzané, France Laboratoire Géosciences Océan, Institut Universitaire Européen de la Mer, Plouzané, France Aix-Marseille Univ., CNRS, IRD, INRA, Coll. France, UM 34 CEREGE, Technopôle de l’Environnement Arbois-Méditerranée, Aix-en-Provence, France C2 CNRS, FRANCE UNIV LIBRE BRUXELLES, BELGIUM IFREMER, FRANCE UBO, FRANCE UNIV AIX MARSEILLE, FRANCE SI BREST SE PDG-REM-GM-LGS UM LGO IN WOS Ifremer UPR copubli-france copubli-europe copubli-univ-france IF 21.531 TC 23 UR https://archimer.ifremer.fr/doc/00667/77892/80157.pdf LA English DT Article AB Denudation is one of the main processes that shapes landscapes. Because temperature, precipitation and glacial extents are key factors involved in denudation, climatic fluctuations are thought to exert a strong control on this parameter over geological timescales. However, the direct impacts of climatic variations on denudation remain controversial, particularly those involving the Quaternary glacial cycles in mountain environments. Here we measure in situ cosmogenic 10Be concentration in quartz in marine turbidites of two high-resolution cores collected in the Mediterranean Sea, providing a near-continuous (temporal resolution of ~1–2 kyr) reconstruction of denudation in the Southern Alps since 75 kyr ago (ka). This high-resolution palaeo-denudation record can be compared with well-constrained climatic variations over the last glacial cycle. Our results indicate that total denudation rates were approximately two times higher than present during the Last Glacial Maximum (26.5–19 ka), the glacial component of the denudation rates being 1.5+0.9−1.0 mm yr−1. However, during moderately glaciated times (74–29 ka), denudation rates were similar to those today (0.24 ± 0.04 mm yr−1). This suggests a nonlinear forcing of climate on denudation, mainly controlled by the interplay between glacier velocity and basin topography. Hence, the onset of Quaternary glaciations, 2.6 million years ago, did not necessarily induce a synchronous global denudation pulse. PY 2021 PD JAN SO Nature Geoscience SN 1752-0894 PU Springer Science and Business Media LLC VL 14 IS 1 UT 000604826300001 BP 16 EP 22 DI 10.1038/s41561-020-00672-2 ID 77892 ER EF