Land-ocean changes on orbital and millennial time scales and the penultimate glaciation

Margari, Vasiliki and Skinner, Luke C. and Hodell, David A. and Martrat, Belen and Toucanne, Samuel and Grimalt, Joan O. and Gibbard, Philip L. and Lunkka, J. P. and Tzedakis, P. C. (2014) Land-ocean changes on orbital and millennial time scales and the penultimate glaciation. Geology, 43 (3). pp. 183-186. ISSN 0091-7613, 1943-2682 DOI 10.1130/G35070.1

[img]
Preview
Text
Geology-2014-Margari-G35070.1.pdf - Published Version
Available under License Creative Commons Attribution.

Download (272kB) | Preview
[img] Text
ft2014.htm - Supplemental Material
Available under License Creative Commons Attribution.

Download (95kB)
Official URL: http://geology.gsapubs.org/content/early/2014/01/1...

Abstract

Past glacials can be thought of as natural experiments in which variations in boundary conditions influenced the character of climate change. However, beyond the last glacial, an integrated view of orbital- and millennial-scale changes and their relation to the record of glaciation has been lacking. Here, we present a detailed record of variations in the land-ocean system from the Portuguese margin during the penultimate glacial and place it within the framework of ice-volume changes, with particular reference to European ice-sheet dynamics. The interaction of orbital- and millennial-scale variability divides the glacial into an early part with warmer and wetter overall conditions and prominent climate oscillations, a transitional mid-part, and a late part with more subdued changes as the system entered a maximum glacial state. The most extreme event occurred in the mid-part and was associated with melting of the extensive European ice sheet and maximum discharge from the Fleuve Manche river. This led to disruption of the meridional overturning circulation, but not a major activation of the bipolar seesaw. In addition to stadial duration, magnitude of freshwater forcing, and background climate, the evidence also points to the influence of the location of freshwater discharges on the extent of interhemispheric heat transport.

Item Type: Article
Uncontrolled Keywords: 2013AREP; IA67; OA;
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
07 - Gold Open Access
Journal or Publication Title: Geology
Volume: 43
Page Range: pp. 183-186
Identification Number: 10.1130/G35070.1
Depositing User: Sarah Humbert
Date Deposited: 21 Mar 2014 18:30
Last Modified: 13 Jul 2014 20:30
URI: http://eprints.esc.cam.ac.uk/id/eprint/2996

Actions (login required)

View Item View Item

About cookies