FN Archimer Export Format
PT J
TI Imprint of seasonality changes on fluvio-glacial dynamics across Heinrich Stadial 1 (NE Atlantic Ocean)
BT 
AF Fersi, Wiem
   Penaud, Aurélie
   Wary, Mélanie
   Toucanne, Samuel
   Waelbroeck, Claire
   Rossignol, Linda
   Eynaud, Frédérique
AS 1:1;2:1;3:2;4:3;5:4;6:5;7:5;
FF 1:;2:;3:;4:PDG-REM-GM-LGS;5:;6:;7:;
C1 Univ Brest (UBO), CNRS, UMR 6538 Laboratoire Géosciences Océan (LGO), F-29280 Plouzané, France
   Institut de Ciència i Tecnologia Ambientals (ICTA-UAB), Universitat Autònoma de Barcelona, Bellaterra, Catalonia, Spain
   Ifremer, Laboratoire Géophysique et environnements Sédimentaires, F-29280 Plouzané, France
   LOCEAN/IPSL, Sorbonne Université-CNRS-IRD-MNHN, UMR7159, Paris, France
   Univ Bordeaux, CNRS, UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), F-33405 Talence, France
C2 UBO, FRANCE
   ICTA-UAB, SPAIN
   IFREMER, FRANCE
   UNIV SORBONNE, FRANCE
   UNIV BORDEAUX, FRANCE
SI BREST
SE PDG-REM-GM-LGS
UM LGO
IN WOS Ifremer UPR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 4.956
TC 1
UR https://archimer.ifremer.fr/doc/00703/81499/85917.pdf
LA English
DT Article
CR IMAGES 1-MD101
   VT 133 / MERIADZEC
BO Marion Dufresne
DE ;Heinrich Stadial 1;Dinoflagellate cysts;Northern Bay of Biscay;European ice sheets;'Fleuve Manche' paleoriver
AB The northern Bay of Biscay has previously proven its great potential for recording the ‘Fleuve Manche’ paleoriver (i.e., the largest Pleistocene river in Europe) fluvio-glacial activity. In this study, new dinoflagellate cyst (dinocyst) analyses have been carried out at sub-centennial resolution in core MD13–3438 to reconstruct the deglacial history of the ‘Fleuve Manche’ paleoriver runoff coupled with European Ice Sheets (EIS) fluctuations across Heinrich Stadial 1 (HS1: 18.2–14.6 ka BP), a key extreme climatic event of the last glacial period. Prior to Heinrich Event (HE) 1 (16.7–14.6 ka BP), the onset of HS1 (18.2–16.7 ka BP) appears here marked by enhanced ‘Fleuve Manche’ paleoriver runoff, materialized by laminated deposits. Our work suggests a novel sub-centennial scale subdivision of the early HS1 (laminated) interval into 5 sub-phases when episodes of substantial fluvio-glacial delivery concomitant with warm summers alternate with episodes of moderate runoff associated with extended cold winters. We argue that multidecadal seasonal changes played a key role in the hydrological regime of western Europe during this HS1 interval, with the retreat of the southern limb of the EIS, and associated influx of meltwater and fluvio-glacial delivery, which were strongly influenced by those multidecadal changes in seasonality. Interestingly, our paleoclimatic record not only evidences the crucial role of seasonality in controlling climate and hydrological variations during HS1 but also shows a remarkable echo with reconstructions from the western Mediterranean Basin, highlighting common climate forcings at regional scale during the last deglaciation. 
PY 2021
PD SEP
SO Global And Planetary Change
SN 0921-8181
PU Elsevier BV
VL 204
UT 000686330100002
DI 10.1016/j.gloplacha.2021.103552
ID 81499
ER

EF