Covariant glacial-interglacial dust fluxes in the equatorial Pacific and Antarctica

LDEO Publication: 
Publication Type  Journal Article
Year of Publication  2008
Authors  Winckler, G.; Anderson, R. F.; Fleisher, M. Q.; McGee, D.; Mahowald, N.
Journal Title  Science
Volume  320
Issue  5872
Pages  93-96
Journal Date  Apr 4
ISBN Number  0036-8075
Accession Number  ISI:000254633000038
Key Words  ocean; climate; maximum; record; deposition; sediments; cycles; sea

Dust plays a critical role in Earth's climate system and serves as a natural source of iron and other micronutrients to remote regions of the ocean. We have generated records of dust deposition over the past 500,000 years at three sites spanning the breadth of the equatorial Pacific Ocean. Equatorial Pacific dust fluxes are highly correlated with global ice volume and with dust fluxes to Antarctica, which suggests that dust generation in interhemispheric source regions exhibited a common response to climate change over late- Pleistocene glacial cycles. Our results provide quantitative constraints on the variability of aeolian iron supply to the equatorial Pacific Ocean and, more generally, on the potential contribution of dust to past climate change and to related changes in biogeochemical cycles.


283JRTimes Cited:0Cited References Count:38

URL  <Go to ISI>://000254633000038
DOI  DOI 10.1126/science.1150595