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Titolo:
Late Holocene Sea temperatures along the central California coast
Autore:
Jones, TL; Kennett, DJ;
Indirizzi:
Calif,Polytech State Univ San Luis Obispo, Dept Social Sci, San Luis Obispo Calif Polytech State Univ San Luis Obispo San Luis Obispo CA USA 93407 po Calif State Univ Long Beach, Dept Anthropol, Long Beach, CA 90840 USA Calif State Univ Long Beach Long Beach CA USA 90840 g Beach, CA 90840 USA
Titolo Testata:
QUATERNARY RESEARCH
fascicolo: 1, volume: 51, anno: 1999,
pagine: 74 - 82
SICI:
0033-5894(199901)51:1<74:LHSTAT>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
EL-NINO; SOUTHERN OSCILLATION; UNITED-STATES; PACIFIC COAST; VARIABILITY; CLIMATE; PRECIPITATION; EVENTS;
Keywords:
California coast; sea temperatures; drought; El Nino; oxygen isotopes; prehistory; fish;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Jones, TL Calif,Polytech State Univ San Luis Obispo, Dept Social Sci, San Luis Obispo Calif Polytech State Univ San Luis Obispo San Luis Obispo CA USA 93407
Citazione:
T.L. Jones e D.J. Kennett, "Late Holocene Sea temperatures along the central California coast", QUATERN RES, 51(1), 1999, pp. 74-82

Abstract

Mussel shells from central California coastal archaeological sites record changes in sea surface temperatures in the past 2000 years. Water temperatures, inferred from oxygen isotopes in the shells, were about 1 degrees C cooler than present and stable between 2000 and 700 yr ago. Between about 700and 500 yr ago, seasonal variation was greater than present, with extremesabove and below historic levels. Water temperatures were 2-3 degrees C cooler than today 500-300 yr ago. The interval of variable sea temperatures 700-500 yr ago partially coincided with an interval of drought throughout central California. A coincident disruption in human settlement along the coast suggests movements of people related to declining water sources. Quantities of fish bone in central coast middens dating to this same period are high relative to other periods, and the remains of northern anchovies, a species sensitive to changing oceanographic conditions, are also abundant. The continued use of local fisheries suggests that changes in settlement and diet were influenced more by drought than by a decrease in marine productivity, as fish provided a staple during an interval of low terrestrial productivity. (C) 1999 University of Washington.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:44:10