FN Archimer Export Format
PT J
TI Ocean-ice sheet interaction along the SE Nordic Seas margin from 35 to15 ka Bp
BT 
AF BECKER, Lukas W. M.
   SEJRUP, Hans Petter
   HJELSTUENA, Berit O.
   HAFLIDASON, Haflidi
   DOKKEN, Trond M.
AS 1:1;2:1;3:1;4:1;5:2,3;
FF 1:;2:;3:;4:;5:;
C1 Univ Bergen, Dept Earth Sci, Bergen, Norway.
   Uni Res, Bergen, Norway.
   Bjerknes Ctr Climate Res, Bergen, Norway.
C2 UNIV BERGEN, NORWAY
   UNI RES, NORWAY
   BCCR, NORWAY
IF 3.349
TC 18
UR https://archimer.ifremer.fr/doc/00495/60694/101203.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 123 / GEOSCIENCES 1
   MD 141 / ALIENOR 1
BO Marion Dufresne
DE ;IRD;Multi-proxy;Norwegian Channel Ice Stream;NE Atlantic margin;Ice sheet variability;Last Glacial Maximum
AB Sediment cores from the south-eastern Nordic Seas simultaneously archive the variability of the Fennoscandian Ice Sheet (FIS), the British-Irish Ice Sheet (BIIS) and the regional oceanic conditions. This study aims to contribute to our understanding of the marine-based section of the FIS and the BIIS between 35,000 and 15,000 years BP, by using cores MD99-2283, MD99-2284 and MD99-2289, retrieved along the upper continental slope between the Faroe-Shetland Channel and the Wiring Plateau. For this, we present a revised, radiocarbon based, Bayesian modelled chronological framework and a compilation of new and published sedimentological, geochemical and micro-paleontological datasets. Our results show a possibly first Weichselian FIS/BIIS confluence at ca. 25,500 years BP in the central North Sea, which buttressed the BIIS to the East, potentially leading to a northwards BIIS deflection via the Shetlands. The Norwegian Channel Ice Stream (NCIS) most likely only reached the shelf edge after 23,300 +/- 500 years BP, possibly for the first time during the Weichselian. The NCIS onset directly preceded a pronounced influx of warm Atlantic water to the northern North Sea margin possibly implying forcing through ocean melt. We find a highly variable NCIS, with three similar to 1400 yearlong episodes of increased ice rafted debris flux interrupted by similar to 600 yearlong minima. When compared to other sides of the European Ice Sheet, these episodes appear to correlate well, suggesting a common forcing mechanism. In conclusion, our data supports recent suggestions that the last glacial stage of the BIIS was more extensive in the central North Sea and the confluence later than previously thought. 
PY 2018
PD AUG
SO Marine Geology
SN 0025-3227
PU Elsevier Science Bv
VL 402
UT 000440121200008
BP 99
EP 117
DI 10.1016/j.margeo.2017.09.003
ID 60694
ER

EF