Constraints on SST estimates for the northern North Atlantic/Nordic Seas during the LGM

Meland, M. Y. and Jansen, E. and Elderfield, H. (2005) Constraints on SST estimates for the northern North Atlantic/Nordic Seas during the LGM. Quaternary Science Reviews, 24 (7-9). pp. 835-852. DOI https://doi.org/10.1016/j.quascirev.2004.05.011

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Abstract

A map of estimated calcification temperatures of the planktic foraminifer Neogloboquadrina pachyderma sinistral (TNps) for the Nordic Seas and the northern North Atlantic for the Last Glacial Maximum was produced from oxygen isotopes with support of Mg/Ca ratios. To arrive at the reconstruction, several constraints concerning the plausible salinity and δ18O-fields were employed. The reconstruction indicates inflow of temperate waters in a wedge along the eastern border of the Nordic Seas and at least seasonally ice-free waters. The reconstruction from oxygen isotopes shows similarities with Mg/Ca based paleotemperatures in the southern and southeastern sector, while unrealistically high Mg/Ca values in the central Nordic Seas prevent the application of the method in this area. The oxygen isotope based reconstruction shows some agreement with temperature reconstructions based on the modern analogue technique, but with somewhat lower temperatures and a stronger internal gradient inside the Nordic Seas. All told, our results suggest a much more ice-free and dynamic high latitude ocean than the CLIMAP reconstruction.

Item Type:	Article
Uncontrolled Keywords:	2005 AREP IA47 2005 P
Subjects:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title:	Quaternary Science Reviews
Volume:	24
Page Range:	pp. 835-852
Identification Number:	https://doi.org/10.1016/j.quascirev.2004.05.011
Depositing User:	Sarah Humbert
Date Deposited:	13 Nov 2010 11:14
Last Modified:	23 Jul 2013 09:59
URI:	http://eprints.esc.cam.ac.uk/id/eprint/1747

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