Otolith delta 18O record of mid-Holocene sea surface temperatures in Peru.
Science
; 295(5559): 1508-11, 2002 Feb 22.
Article
em En
| MEDLINE
| ID: mdl-11859190
ABSTRACT
Peruvian sea catfish (Galeichthys peruvianus) sagittal otoliths preserve a record of modern and mid-Holocene sea surface temperatures (SSTs). Oxygen isotope profiles in otoliths excavated from Ostra [6010 +/- 90 years before the present (yr B.P.); 8 degrees 55'S] indicate that summer SSTs were approximately 3 degrees C warmer than those of the present. Siches otoliths (6450 +/- 110 yr B.P.; 4 degrees 40'S) recorded mean annual temperatures approximately 3 degrees to 4 degrees C warmer than were measured under modern conditions. Trophic level and population diversity and equitability data from these faunal assemblages and other Peruvian archaeological sites support the isotope interpretations and suggest that upwelling of the Peru-Chile current intensified after approximately 5000 yr B.P.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Isótopos de Oxigênio
/
Temperatura
/
Peixes-Gato
/
Membrana dos Otólitos
/
Clima
Limite:
Animals
País/Região como assunto:
America do sul
/
Peru
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article