Increased dust deposition in the Pacific Southern Ocean during glacial periods


Contact
gerhard.kuhn [ at ] awi.de

Abstract

Dust deposition in the Southern Ocean constitutes a critical modulator of past global climate variability, but how it has varied temporally and geographically is underdetermined. Here, we present data sets of glacial-interglacial dust-supply cycles from the largest Southern Ocean sector, the polar South Pacific, indicating three times higher dust deposition during glacial periods than during interglacials for the past million years. Although the most likely dust source for the South Pacific is Australia and New Zealand, the glacial-interglacial pattern and timing of lithogenic sediment deposition is similar to dust records from Antarctica and the South Atlantic dominated by Patagonian sources. These similarities imply large-scale common climate forcings, such as latitudinal shifts of the southern westerlies and regionally enhanced glaciogenic dust mobilization in New Zealand and Patagonia.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Publication Status
Published
Eprint ID
34913
DOI 10.1126/science.1245424

Cite as
Lamy, F. , Gersonde, R. , Winckler, G. , Esper, O. , Jaeschke, A. , Kuhn, G. , Ullermann, J. , Martínez-Garcia, A. , Lambert, F. and Kilian, R. (2014): Increased dust deposition in the Pacific Southern Ocean during glacial periods , Science, 343 (6169), pp. 403-407 . doi: 10.1126/science.1245424


Download
[thumbnail of Lamyetal2014.pdf]
Preview
PDF
Lamyetal2014.pdf

Download (1MB) | Preview
Cite this document as:

Share
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email


Citation

Research Platforms

Campaigns
ANT > XXVI > 2


Actions
Edit Item Edit Item