title: Major advance of South Georgia glaciers during the Antarctic Cold Reversal following extensive sub-Antarctic glaciation.
abstract: The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and termination on sub-Antarctic South Georgia in particular. Here, using sea-floor geophysical data and marine sediment cores, we resolve the record of glaciation offshore of South Georgia through the transition from the Last Glacial Maximum to Holocene. We show a sea-bed landform imprint of a shelf-wide last glacial advance and progressive deglaciation. Renewed glacier resurgence in the fjords between c. 15,170 and 13,340 yr ago coincided with a period of cooler, wetter climate known as the Antarctic Cold Reversal, revealing a cryospheric response to an Antarctic climate pattern extending into the Atlantic sector of the Southern Ocean. We conclude that the last glaciation of South Georgia was extensive, and the sensitivity of its glaciers to climate variability during the last termination more significant than implied by previous studies.
authors.affiliation: College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4RJ, UK.
authors.forename: Alastair G C
authors.initials: AG
authors.lastname: Graham
authors.affiliation: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, Bremerhaven 27568, Germany.
authors.forename: Gerhard
authors.identifier: 0000-0001-6069-7485
authors.initials: G
authors.lastname: Kuhn
authors.affiliation: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, Bremerhaven 27568, Germany.
authors.forename: Ove
authors.initials: O
authors.lastname: Meisel
authors.affiliation: British Antarctic Survey (Natural Environmental Research Council), High Cross, Madingley Road, Cambridge CB3 0ET, UK.
authors.forename: Claus-Dieter
authors.initials: CD
authors.lastname: Hillenbrand
authors.affiliation: British Antarctic Survey (Natural Environmental Research Council), High Cross, Madingley Road, Cambridge CB3 0ET, UK.
authors.forename: Dominic A
authors.initials: DA
authors.lastname: Hodgson
authors.affiliation: Insitute for Geophysics and Geology, University of Leipzig, Talstraße 35, Leipzig 04103, Germany.
authors.forename: Werner
authors.initials: W
authors.lastname: Ehrmann
authors.affiliation: ETH Zürich, Laboratory of Ion Beam Physics, Schafmattstrasse 20, Zürich CH-8093, Switzerland.
authors.forename: Lukas
authors.initials: L
authors.lastname: Wacker
authors.affiliation: MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen D-28359, Germany.
authors.forename: Paul
authors.initials: P
authors.lastname: Wintersteller
authors.affiliation: MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen D-28359, Germany.
authors.forename: Christian
authors.identifier: 0000-0003-3228-7862
authors.initials: C
authors.lastname: Dos Santos Ferreira
authors.affiliation: MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen D-28359, Germany.
authors.forename: Miriam
authors.initials: M
authors.lastname: Römer
authors.affiliation: Institute of Applied Ecology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia.
authors.forename: Duanne
authors.initials: D
authors.lastname: White
authors.affiliation: MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen D-28359, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Bohrmann