Publication Date:
2024-04-16
Description:
Here, we have calculated new sea-surface temperature estimates over Dansgaard-Oeschger (DO) events 5-8 (c. 30-40 ka) from 14 sites in the North Atlantic, based on previously published planktic foraminifera relative abundance datasets. These proxy records suggest a large variability in North Atlantic sea-surface temperatures during DO-events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with the planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO-events 5-8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. We find that sea-surface temperature variability over the DO-events is characterized by colder conditions in the subpolar North Atlantic during stadials than during interstadials, and the variability is linked to changes in the AMOC, and in the sea-ice cover. Forced simulations are needed to capture the strength of the temperature variability and to reconstruct the variability in other climate records not directly linked to the sea-surface temperature reconstructions.
Keywords:
162-983A; 3664N/S; 94-609_Site; AGE; ALIENOR; Arctic Ocean; CALYPSO; Calypso Corer; Calypso Square Core System; CASQS; CH69-K09; COMPCORE; Composite Core; Depth, bottom/max; Depth, composite; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; GC; GEOSCIENCES, MARMARCORE; GIK15612-2; GIK23415-9; Glomar Challenger; Gravity corer; Gravity corer (Kiel type); IMAGES I; IMAGES V; Jan Mayen; JM96; JM96-1225/2-GC; Joides Resolution; KAL; Kasten corer; KOL; Leg162; Leg94; Le Suroît; M17/2; M57; Marion Dufresne (1995); Maximum-likelihood estimation (MLE); MD01-2461; MD04-2829CQ; MD04-2845; MD101; MD114; MD123; MD141; MD952010; MD95-2010; MD99-2284; Meteor (1964); Meteor (1986); N. Shetland channel; Newfoundland margin; North Atlantic; North Atlantic/FLANK; Northeast Atlantic; North East Atlantic; Norwegian Sea; PALEOCINAT; PALEOCINAT II; PC; Piston corer; Piston corer (Kiel type); Reconstructed from the percentage of Neogloboquadrina pachyderma sinistral; REYKJANES-RÜCKEN; Sample code/label; Sea surface temperature; SL; SO82; SO82_5-2; Sonne; South Atlantic Ocean; SU90-24; SU92; SU92-03; Voring Plateau
Type:
Dataset
Format:
text/tab-separated-values, 2141 data points
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