FN Archimer Export Format
PT J
TI Glacial North Atlantic: Sea-surface conditions reconstructed by GLAMAP 2000
BT 
AF PFLAUMANN, U
   SARNTHEIN, M
   CHAPMAN, M
   D'ABREU, L
   FUNNELL, B
   HUELS, M
   KIEFER, T
   MASLIN, M
   SCHULZ, H
   SWALLOW, J
   VAN KREVELD, S
   VAUTRAVERS, M
   VOGELSANG, E
   WEINELT, M
AS 1:1;2:1;3:2;4:3;5:2;6:4;7:1;8:5;9:6;10:7;11:1;12:3;13:1;14:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;
C1 Univ Kiel, Inst Geowissensch, D-24098 Kiel, Germany.
   Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England.
   Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England.
   Univ Kiel, Leibniz Lab, D-24098 Kiel, Germany.
   UCL, Dept Geog, London WC1H 0AP, England.
   Univ Tubingen, Geol Palaontol Inst, Tubingen, Germany.
   Nat Hist Museum, Dept Paleontol, London SW7 5BD, England.
C2 UNIV KIEL, GERMANY
   UNIV E ANGLIA, UK
   UNIV CAMBRIDGE, UK
   UNIV KIEL, GERMANY
   UNIV COLL LONDON, UK
   UNIV TUBINGEN, GERMANY
   NHM, UK
IF 3.048
TC 163
UR https://archimer.ifremer.fr/doc/00225/33668/32070.pdf
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
DE ;Last Glacial Maximum;Atlantic sea-surface temperatures;seasonality;sea ice cover;glacial cooling near equator;glacial upwelling intensity
AB The response of the tropical ocean to global climate change and the extent of sea ice in the glacial nordic seas belong to the great controversies in paleoclimatology. Our new reconstruction of peak glacial sea surface temperatures (SSTs) in the Atlantic is based on census counts of planktic foraminifera, using the Maximum Similarity Technique Version 28 (SIMMAX-28) modern analog technique with 947 modern analog samples and 119 well-dated sediment cores. Our study compares two slightly different scenarios of the Last Glacial Maximum (LGM), the Environmental Processes of the Ice Age: Land, Oceans, Glaciers (EPILOG), and Glacial Atlantic Ocean Mapping (GLAMAP 2000) time slices. The comparison shows that the maximum LGM cooling in the Southern Hemisphere slightly preceeded that in the north. In both time slices sea ice was restricted to the north western margin of the nordic seas during glacial northern summer, while the central and eastern parts were ice-free. During northern glacial winter, sea ice advanced to the south of Iceland and Faeroe. In the central northern North Atlantic an anticyclonic gyre formed between 45degrees and 60degreesN, with a cool water mass centered west of Ireland, where glacial cooling reached a maximum of >12degreesC. In the subtropical ocean gyres the new reconstruction supports the glacial-to-interglacial stability of SST as shown by CLIMAP Project Members (CLIMAP) [1981]. The zonal belt of minimum SST seasonality between 2degrees and 6degreesN suggests that the LGM caloric equator occupied the same latitude as today. In contrast to the CLIMAP reconstruction, the glacial cooling of the tropical east Atlantic upwelling belt reached up to 6degrees-8degreesC during Northern Hemisphere summer. Differences between these SIMMAX-based and published U37(k)- and Mg/Ca-based equatorial SST records are ascribed to strong SST seasonalities and SST signals that were produced by different planktic species groups during different seasons.
PY 2003
PD AUG
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 18
IS 3
UT 000184711400001
DI 10.1029/2002PA000774
ID 33668
ER

EF