Sea surface temperature changes in the southern California borderlands during the last glacial-interglacial cycle
Mortyn, P. Graham (University of South Carolina. Department of Geological Sciences)
Thunell, Robert C. (University of South Carolina. Department of Geological Sciences)
Anderson, David M. (NOAA Paleoclimatology Program (Boulder, Colorado))
Stott, Lowell D. (University of South Carolina. Department of Earth Sciences)
Le, Jianning (University of South Carolina. Department of Geological Sciences)

Date:	1996
Abstract:	A variety of evidence suggests that average sea surface temperatures (SSTs) during the last glacial maximum in the California Borderlands region were significantly colder than during the Holocene. Planktonic foraminiferal δ18O evidence and average SST estimates derived by the modern analog technique indicate that temperatures were 6°-10°C cooler during the last glacial relative to the present. The glacial plankton assemblage is dominated by the planktonic foraminifer Neogloboquadrina pachyderma (sinistral coiling) and the coccolith Coccolithus pelagicus, both of which are currently restricted to subpolar regions of the North Pacific. The glacial-interglacial average SST change determined in this study is considerably larger than the 2°C change estimated by Climate: Long-Range Investigation, Mapping, and Prediction (CLIMAP) [1981]. We propose that a strengthened California Current flow was associated with the advance of subpolar surface waters into the Borderlands region during the last glacial.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; Versió publicada
Subject:	Oceans ; Micropaleontology ; Analytical modeling and laboratory experiments ; Stable isotopes
Published in:	Paleoceanography, Vol. 11, Issue 4 (1996) , p. 415-430, ISSN 1944-9186

DOI: 10.1029/96PA01236

15 p, 1.2 MB

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