FN Archimer Export Format PT J TI 120,000 year record of sea ice in the North Atlantic BT AF Maffezzoli, Niccolò Vallelonga, Paul Edwards, Ross Saiz-Lopez, Alfonso Turetta, Clara Kjær, Helle Astrid Barbante, Carlo Vinther, Bo Spolaor, Andrea AS 1:1;2:1;3:2,3;4:4;5:5,6;6:1;7:5,6;8:1;9:5,6; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:; C1 Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen Ø 2100, Denmark Physics and Astronomy, Curtin University of Technology, Kent St, Bentley, WA 6102, Perth, Australia Department of Civil and Environmental Engineering, UW-Madison, Madison, WI 53706, USA Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino 155, 30170 Venice Mestre, Italy Institute for the Dynamics of Environmental Processes, IDPA-CNR, Via Torino 155, 30170 Venice Mestre, Italy C2 UNIV COPENHAGEN, DENMARK UNIV CURTIN, AUSTRALIA UNIV WISCONSIN, USA CSIC, SPAIN UNIV VENICE, ITALY CNR, ITALY IN DOAJ TC 0 UR https://archimer.ifremer.fr/doc/00504/61580/65511.pdf https://archimer.ifremer.fr/doc/00504/61580/70330.pdf LA English DT Article CR IMAGES 1-MD101 IMAGES V LEG 1-MD114 IMAGES V LEG 4-MD114 IMAGES V LEG 5 BO Marion Dufresne AB Although it has been demonstrated that the speed and magnitude of recent Arctic sea ice decline is unprecedented for the past 1,450 years, few records are available to provide a paleoclimate context for Arctic sea ice extent. Here we present a 120 kyr record of bromine enrichment from the RECAP ice core, coastal East Greenland, and reconstruct past sea ice conditions in the North Atlantic as far north as the entrance of the Arctic Ocean (50–85° N). Bromine enrichment has been previously employed to reconstruct first-year sea ice (FYSI) in the Canadian Arctic over the last glacial cycle. We find that during the last deglaciation, the transition from multi-year sea ice (MYSI) to FYSI started at ∼ 17.6 kyr, synchronous with sea ice reductions observed in the eastern Nordic seas (Müller and Stein, 2014; Hoff et al., 2016) and with the increase of North Atlantic ocean temperature (Dokken and Jansen, 1999). FYSI reached its maximum extent at 12.4–11.8 kyr, after which open-water conditions started to dominate, as supported by sea ice records from the eastern Nordic seas and the North Icelandic shelf. Our results show that over the last 120,000 years, sea ice extent was greatest during Marine Isotope Stage (MIS) 2 and MIS4, with decreased levels during MIS3 and the onset of the last glacial period (late-MIS5). Sea ice extent during the last 10 kyr (Holocene/MIS1) has been less than at any time in the last 120 kyr. PY 2019 SO Climate of the Past SN 1814-9332 PU Copernicus GmbH VL 15 IS 6 BP 2031 EP 2051 DI 10.5194/cp-2018-80 ID 61580 ER EF