Sea surface temperature estimates from several sediment cores in the North Atlantic

DOI

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.

The SST calculations build on previously published foraminifera data (see 'Related to'). Where no sample interval is given, this information was not available. Mbsf and mcd depths are the same for all cores except the ODP and DSDP cores, where composite depth scales exist. The other sites are continuous cores and hence there is no need for composite depths.

Identifier
DOI https://doi.org/10.1594/PANGAEA.882403
Related Identifier https://doi.org/10.1594/PANGAEA.890893
Related Identifier https://doi.org/10.1038/nature14330
Related Identifier https://doi.org/10.1594/PANGAEA.667086
Related Identifier https://doi.org/10.1594/PANGAEA.880146
Related Identifier https://doi.org/10.1594/PANGAEA.882431
Related Identifier https://doi.org/10.1594/PANGAEA.881871
Related Identifier https://doi.org/10.1594/PANGAEA.881759
Related Identifier https://doi.org/10.1594/PANGAEA.881437
Related Identifier https://doi.org/10.1594/PANGAEA.202139
Related Identifier https://doi.org/10.1594/PANGAEA.881450
Related Identifier https://doi.org/10.1594/PANGAEA.881904
Related Identifier https://doi.org/10.1594/PANGAEA.743086
Related Identifier https://doi.org/10.1594/PANGAEA.881433
Related Identifier https://doi.org/10.1594/PANGAEA.261313
Related Identifier https://doi.org/10.1594/PANGAEA.186156
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.882403
Provenance
Creator Jensen, Mari F; Nummelin, Aleksi; Nielsen, Søren B; Sadatzki, Henrik; Sessford, Evangeline; Risebrobakken, Bjørg; Andersson, Carin; Voelker, Antje H L; Roberts, William H G; Pedro, Joel B; Born, Andreas
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2017
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 2141 data points
Discipline Earth System Research
Spatial Coverage (-47.350W, 41.760S, 4.566E, 66.684N); North Atlantic Ocean; North Atlantic/FLANK; Newfoundland margin; North Atlantic; Norwegian Sea; Arctic Ocean; Northeast Atlantic; North East Atlantic; Voring Plateau; N. Shetland channel
Temporal Coverage Begin 1981-08-20T00:00:00Z
Temporal Coverage End 2001-09-10T11:03:00Z