Intermittent existence of a southern Californian upwelling cell during submillennial climate change of the last 60 kyr
Article first published online: 7 AUG 2004
Copyright 2004 by the American Geophysical Union.
Volume 19, Issue 3, September 2004
How to Cite
2004), Intermittent existence of a southern Californian upwelling cell during submillennial climate change of the last 60 kyr, Paleoceanography, 19, PA3007, doi:10.1029/2003PA000965., , , and (
- Issue published online: 7 AUG 2004
- Article first published online: 7 AUG 2004
- Manuscript Accepted: 25 JUN 2004
- Manuscript Revised: 24 MAY 2004
- Manuscript Received: 16 SEP 2003
 Application of a high-resolution multiproxy approach to a sedimentary section drilled at Ocean Drilling Program Site 1017, located under a highly active upwelling cell off Point Conception, California, provides clear evidence for surface ocean productivity shifts on submillennial timescales during the last 60 kyr. The proxies include bulk-sediment major and minor elements, organic carbon and carbonate concentrations, δ15N, and planktonic foraminiferal species assemblage and carbon isotope determinations. The collective results demonstrate that marine productivity in this area was not simply linearly related to cold and warm cycles except during the millennial-scale climate oscillations of marine isotope stage (MIS) 3. During that interval, the upwelling cell and resulting high productivity were active during warm interstadial events and were largely inactive during cool stadial events. However, the Last Glacial Maximum was also relatively productive. Productivity increased dramatically during the Bølling warm interval, while the Ållerød and Younger Dryas were much less productive. High coccolithophorid abundance commenced during the earliest Holocene after 10 ka. The complexity of the productivity response was probably related to interplay between local winds, as well as California Undercurrent strength.