FN Archimer Export Format
PT J
TI Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response
BT 
AF DEPUYDT, Pauline
   MOJTAHID, Meryem
   BARRAS, Christine
   BOUHDAYAD, Fatima Zohra
   TOUCANNE, Samuel
AS 1:1;2:1;3:1;4:1;5:2;
FF 1:;2:;3:;4:;5:PDG-REM-GEOOCEAN-ASTRE;
C1 Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, F‐49000, Angers, France
   Univ Brest, CNRS, Ifremer, Geo‐Ocean, F‐29280, Plouzane, France
C2 UNIV ANGERS, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-ASTRE
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
IF 2.3
TC 2
UR https://archimer.ifremer.fr/doc/00803/91513/97759.pdf
LA English
DT Article
CR BOBGEO
BO Pourquoi pas ?
DE ;AMOC;benthic foraminifera;Channel River;European Ice Sheet;Glacial Eastern Boundary Current (GEBC);intermediate water masses
AB The interaction between ocean circulation and ice-sheet dynamics plays a key role in the Quaternary climate. Compared with the surface and deep regions of the Atlantic Meridional Overturning Circulation (AMOC), the study of intermediate depths during key time periods, such as Heinrich Stadials (HSs), remains poorly documented, especially for the northeast Atlantic. Here we use benthic foraminiferal assemblage data to trace palaeoenvironmental changes from similar to 32 to 14 ka cal BP at similar to 1000 m depth in the Bay of Biscay. Our results highlight the high sensitivity of foraminifera, with species-specific responses, to continental (European Ice Sheet dynamics) and marine (AMOC) forcing factors during the last three HSs. In general, HSs were characterised by the concomitant presence of meso-oligotrophic and anoxia indicator species and the low abundance of high-energy indicator species. This confirms an overall sluggish intermediate circulation during the three HSs in the northeast Atlantic. HS1 is distinctive for its abundance of high-organic flux indicator species during its early phase. This is consistent with the fact that HS1 was by far the most important period of ice-sheet retreat and meltwater release into the ocean over the studied time interval. Finally, foraminifera depict the mid-HS2 reventilation event due to regional glacier instabilities. 
PY 2022
PD OCT
SO Journal Of Quaternary Science
SN 0267-8179
PU Wiley
VL 37
IS 7
UT 000810768800001
BP 1207
EP 1221
DI 10.1002/jqs.3444
ID 91513
ER

EF