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Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age

Moffa-Sánchez, P; Hall, IR; Barker, S; Thornalley, DJR; Yashayaev, I; (2014) Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age. Paleoceanography , 29 (3) pp. 160-175. 10.1002/2013PA002523. Green open access

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Abstract

Despite the relative climate stability of the present interglacial, it has been punctuated by several centennial-scale climatic oscillations; the latest of which are often colloquially referred to as the Medieval Climatic Anomaly (MCA) and the Little Ice Age (LIA). The most favored explanation for the cause of these anomalies is that they were triggered by variability in solar irradiance and/or volcanic activity and amplified by ocean-atmosphere-sea ice feedbacks. As such, changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) are widely believed to have been involved in the amplification of such climatic oscillations. The Labrador Sea is a key area of deep water formation. The waters produced here contribute approximately one third of the volume transport of the deep limb of the AMOC and drive changes in the North Atlantic surface hydrography and subpolar gyre circulation. In this study, we present multiproxy reconstructions from a high-resolution marine sediment core located south of Greenland that suggest an increase in the influence of polar waters reaching the Labrador Sea close to MCA-LIA transition. Changes in freshwater forcing may have reduced the formation of Labrador Sea Water and contributed toward the onset of the LIA cooling. © 2014. The Authors.

Type: Article
Title: Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/2013PA002523
Publisher version: http://dx.doi.org/10.1002/2013PA002523
Language: English
Additional information: © 2014. The Authors. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: last millennium, Mg/Ca, planktonic foraminifera, surface Labrador Sea
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/1422733
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