Increased Dust Deposition in the Pacific Southern Ocean During Glacial Periods

Lamy, F; Gersonde, R.; Winckler, G; Esper, O; Jaeschke, A; Kuhn, G.; Ullermann, J; Martinez-Garcia, A; Lambert, F.; Kilian, R

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.

Más información

Título según WOS: Increased Dust Deposition in the Pacific Southern Ocean During Glacial Periods
Título según SCOPUS: Increased dust deposition in the Pacific Southern Ocean during glacial periods
Título de la Revista: SCIENCE
Volumen: 343
Número: 6169
Editorial: AMER ASSOC ADVANCEMENT SCIENCE
Fecha de publicación: 2014
Página de inicio: 403
Página final: 407
Idioma: English
URL: http://www.sciencemag.org/cgi/doi/10.1126/science.1245424
DOI:

10.1126/science.1245424

Notas: ISI, SCOPUS