FN Archimer Export Format
PT J
TI Enhanced surface melting of the Fennoscandian Ice Sheetduring periods of North Atlantic cooling
BT 
AF Boswell, Steven M.
   Toucanne, Samuel
   Pitel-Roudaut, Mathilde
   Creyts, Timothy T.
   Eynaud, Frédérique
   Bayon, Germain
AS 1:1,2;2:3;3:3;4:1;5:4;6:3;
FF 1:;2:PDG-REM-GM-LGS;3:PDG-REM-GM-CTDI;4:;5:;6:PDG-REM-GM-LGS;
C1 Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA
   Department of Earth and Environmental Sciences, Columbia University, New York, New York 10027, USA
   Institut Français de Recherche pour l’Exploitation de la Mer (IFREMER), Unité de Recherche Géosciences Marines, F-29280 Plouzané, France
   Laboratoire Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR 5805, Université de Bordeaux, F-33615 Pessac, France
C2 LDEO, USA
   UNIV COLUMBIA, USA
   IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
SI BREST
SE PDG-REM-GM-LGS
   PDG-REM-GM-CTDI
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 4.768
TC 22
UR https://archimer.ifremer.fr/doc/00499/61065/64596.pdf
LA English
DT Article
CR MD 133 / SEDICAR
BO Marion Dufresne
AB Heinrich events (HEs) are dramatic episodes of marine-terminating ice discharge and sediment rafting during periods of cold North Atlantic climate. However, the causal chain of events leading to their occurrence is unresolved. Here, we demonstrate that enhanced surface melting of land-terminating margins of the southern Fennoscandian Ice Sheet (FIS) is a recurring feature of Heinrich stadials (HSs), the cold periods during which HEs occur. We use neodymium isotopes to show that the Channel River transported detrital sediments from the interior of eastern Europe to the Bay of Biscay in the northeast Atlantic Ocean at ca. 158–154 ka. Based on similar evidence from the last glacial period, we infer that this interval corresponds to the melting and retreat of the southern FIS margin despite contemporaneous cooling in the North Atlantic and central Europe. The FIS melting episode occurred just prior to a HE, consistent with findings from the more recent HSs 1, 2, and 3. Based on this evidence, we clarify a sequence of events that precedes HEs. Precursor melting of North Atlantic–adjacent ice sheets induces an initial Atlantic meridional overturning circulation (AMOC) slowdown. Atmospheric changes during the resulting HS cause summertime warming in northern Europe that drives enhanced FIS melting. Subsequent meltwater discharge to the North Atlantic further weakens the AMOC and warms the intermediate water masses that contribute to HEs. 
PY 2019
PD JUN
SO Geology
SN 0091-7613
PU Geological Society of America
VL 47
IS 7
UT 000472711900020
BP 664
EP 668
DI 10.1130/G46370.1
ID 61065
ER

EF