Kuroda, Tomoko et al. (2000): Temporal variations of biogenic components on the Northern California margin since the late Pleistocene, Site 1020

Leg/Site/Hole:
ODP 167
ODP 167 1020
Identifier:
2000-080030
georefid
10.2973/odp.proc.sr.167.232.2000
doi
Creator:
Kuroda, Tomoko
Hokkaido University, Department of Earth and Planetary Sciences, Sapporo, Japan
author
Sakamoto, Tatsuhiko
Hokkaido University, Japan
author
Koizumi, Itaru
Ocean Drilling Program, United States
author
Identification:
Temporal variations of biogenic components on the Northern California margin since the late Pleistocene, Site 1020
2000
In: Lyle, Mitchell, Koizumi, Itaru, Richter, Carl, Behl, Richard J., Boden, Per, Caulet, Jean-Pierre, Delaney, Margaret L., deMenocal, Peter, Desmet, Marc, Fornaciari, Eliana, Hayashida, Akira, Heider, Franz, Hood, Julie A., Hovan, Steven A., Janecek, Thomas R., Janik, Aleksandra G., Kennett, James P., Lund, David, Machain Castillo, Maria L., Maruyama, Toshiaki, Merrill, Russell B., Mossman, David J., Pike, Jennifer, Ravelo, A. Christina, Rozo Vera, Gloria A., Stax, Rainer, Tada, Ryuji, Thurow, Juergen W., Yamamoto, Masanobu, Nessler, Susan (editor), Miller, Christine M. (editor), Peters, Lorri L. (editor), Proceedings of the Ocean Drilling Program, scientific results, California margin; covering Leg 167 of the cruises of the drilling vessel JOIDES Resolution, Acapulco, Mexico, to San Francisco, California, sites 1010-1022, 20 April-16 June 1996
Texas A & M University, Ocean Drilling Program, College Station, TX, United States
167
203-206
The California Current and associated coastal upwelling have changed with the growth and decay of the North American ice sheets since 2.5 Ma. Because the coastal upwelling has a close relationship with biogenic productivity in surface water, analyses of biogenic components in sediments of the upwelling region enable us to reconstruct the past changes of the productivity and/or the current systems. In this study, we analyzed biogenic silica and carbonate as well as organic carbon in sediments from the northern California margin, Hole 1020B. The results show that terrigenous-free content of biogenic silica is high during interglacial periods since 800 ka and varies in correspondence with 100-k.y. glacial-interglacial cycles. On the other hand, terrigenous-free content of biogenic carbonate is high during-glacial periods. These temporal variations may have been caused by changes in the origin of deep water.
English
Serial
Coverage:Geographic coordinates:
North:41.0003
West:-126.2604East: -126.2604
South:41.0003
Quaternary geology; biogenic processes; California; California Current; carbonates; Cenozoic; climate change; continental margin; cycles; East Pacific; glacial environment; Holocene; interglacial environment; Leg 167; North Pacific; Northeast Pacific; Northern California; Ocean Drilling Program; ODP Site 1020; Pacific Ocean; paleo-oceanography; paleoclimatology; Pleistocene; productivity; Quaternary; silica; United States; upper Pleistocene; upwelling;
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