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Description:
Title:
Comparison of equatorial Pacific sea surface temperature variability and trends with Sr/Ca records from multiple corals
Author(s):
Alpert, Alice E.
Cohen, Anne L.
Oppo, Delia W.
DeCarlo, Thomas M.
Gove, Jamison M.
Young, Charles W.
Dates of Publication:
2016
Abstract:
Coral Sr/Ca is widely used to reconstruct past ocean temperatures. However, some studies report different Sr/Ca-temperature relationships for conspeci fics on the same reef, with profound implications for interpretation of reconstructed temperatures. We assess whether these differences are attributable to small-scale oceanographic variability or “vital effects ”associated with coral calci fication and quantify the effect of intercolony differences on temperature estimates and uncertainties. Sr/Ca records from four massivePorites colonies growing on the east and west sides of Jarvis Island, central equatorial Paci fic, were compared with in situ logger temperatures spanning 2002 –2012. In general, Sr/Ca captured the occurrence of interannual sea surface temperature events but their amplitude was not consistently recorded by any of the corals.No long-term trend was identi fied in the instrumental data, yet Sr/Ca of one coral implied a statistically
Keywords:
Oceanography
Paleontology
Local Corporate Name:
NMFS (National Marine Fisheries Service)
JIMAR (Joint Institute for Marine and Atmospheric Research)
PIFSC (Pacific Islands Fisheries Science Center)
CoRIS (Coral Reef Information System)
Format:
PDF
Type of Resource:
Journal Article
Note:
Coral Sr/Ca is widely used to reconstruct past ocean temperatures. However, some studies report different Sr/Ca-temperature relationships for conspeci fics on the same reef, with profound implications for interpretation of reconstructed temperatures. We assess whether these differences are attributable to small-scale oceanographic variability or “vital effects ”associated with coral calci fication and quantify the effect of intercolony differences on temperature estimates and uncertainties. Sr/Ca records from four massivePorites colonies growing on the east and west sides of Jarvis Island, central equatorial Paci fic, were compared with in situ logger temperatures spanning 2002 –2012. In general, Sr/Ca captured the occurrence of interannual sea surface temperature events but their amplitude was not consistently recorded by any of the corals.No long-term trend was identi fied in the instrumental data, yet Sr/Ca of one coral implied a statistically
URL:
DOI:
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