Oxygen Isotope Record of the 1997–1998 El Niño in Peruvian Sea Catfish (Galeichthys peruvianus) Otoliths

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dc.contributor.author Andrus, C. Fred T.
dc.contributor.author Crowe, Douglas E.
dc.contributor.author Romanek, Christopher S.
dc.coverage.spatial Peru en_US
dc.coverage.spatial Pacific Ocean en_US
dc.coverage.temporal 1997–1998
dc.date.accessioned 2019-01-18T22:18:12Z
dc.date.available 2019-01-18T22:18:12Z
dc.date.issued 2002-10-11
dc.identifier.citation Andrus, C., Crowe, D., Romanek, C. (2002): Oxygen Isotope Record of the 1997–1998 El Niño in Peruvian Sea Catfish (Galeichthys peruvianus) Otoliths. Paleoceanography, 17(4). DOI: https://doi.org/10.1029/2001PA000652 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5302
dc.identifier.uri https://doi.org/10.1029/2001PA000652 en_US
dc.description.abstract Sagittal otoliths of the Peruvian sea catfish Galeichthys peruvianus were collected from the north coast of Peru during and after the 1997–1998 El Niño. The otoliths were analyzed via laser microprobe and micromilling techniques for oxygen isotope composition through ontogeny to document their use as an El Niño‐Southern Oscillation (ENSO) proxy. Results were compared to theoretical calculations for the δ18O of otolith aragonite using measured sea surface temperatures (SST) and δ18O values for local seawater assuming equilibrium oxygen isotope fractionation was achieved. All otoliths recorded the 1997–1998 El Niño event as well as seasonal temperature variations. These ENSO events were recorded in otolith aragonite as significant negative excursions in δ18O that reflected the increased temperature of local marine waters. The combined otolith data were used to create a 10‐year SST record, including ENSO events and local seasonal temperature variation, validating the use of otolith δ18O as a temperature proxy. en_US
dc.format.mimetype application/pdf
dc.subject otolith en_US
dc.subject ENSO
dc.subject stable isotopes en_US
dc.subject Galeichthys peruvianus en_US
dc.subject Catfish en_US
dc.subject.lcsh El Niño Current en_US
dc.title Oxygen Isotope Record of the 1997–1998 El Niño in Peruvian Sea Catfish (Galeichthys peruvianus) Otoliths en_US
dc.type text en_US


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