Response of the North Atlantic surface and intermediate ocean structure to climate warming of MIS 11.

Kandiano, Evgenia S., van der Meer, Marcel T. J., Schouten, Stefan, Fahl, Kirsten, Sinninghe Damsté, Jaap S. and Bauch, Henning A. (2017) Response of the North Atlantic surface and intermediate ocean structure to climate warming of MIS 11. Open Access Scientific Reports, 7 (46192). DOI 10.1038/srep46192.

[img]
Preview
Text
srep46192.pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (1142Kb) | Preview
[img]
Preview
Text
srep46192-s1.pdf - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (405Kb) | Preview

Supplementary data:

Abstract

Investigating past interglacial climates not only help to understand how the climate system operates in general, it also forms a vital basis for climate predictions. We reconstructed vertical stratification changes in temperature and salinity in the North Atlantic for a period some 400 ka ago (MIS11), an interglacial time analogue of a future climate. As inferred from a unique set of biogeochemical, geochemical, and faunal data, the internal upper ocean stratification across MIS 11 shows distinct depth-dependent dynamical changes related to vertical as well as lateral shifts in the upper Atlantic meridional circulation system. Importantly, transient cold events are recognized near the end of the long phase of postglacial warming at surface, subsurface, mid, and deeper water layers. These data demonstrate that MIS 11 coolings over the North Atlantic were initially triggered by freshwater input at the surface and expansion of cold polar waters into the Subpolar Gyre. The cooling signal was then transmitted downwards into mid-water depths. Since the cold events occurred after the main deglacial phase we suggest that their cause might be related to continuous melting of the Greenland ice sheet, a mechanism that might also be relevant for the present and upcoming climate.

Document Type: Article
Additional Information: WOS:000398976900001; PubMed ID: 28393849
Keywords: temperature reconstructions at various water depths, salinity reconstructions, MIS 11, North Atlantic, interglacial cold events
Research affiliation: AWI
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
NIOZ
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1038/srep46192
ISSN: 2045-2322
Projects: PICKS
Date Deposited: 28 Apr 2017 08:26
Last Modified: 22 Jul 2019 10:40
URI: http://oceanrep.geomar.de/id/eprint/37727

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...