Carbon and oxygen isotopic composition of a Guam coral and their relationships to environmental variables in the western Pacific

We examine the high-resolution (∼32 samples/year) carbon and oxygen isotopic composition (δ 13C coral and δ 18O coral) in a coral core ( Porites lobata) from Double Reef, Guam over the years 1980–2000. The δ 13C coral shows clear seasonal variations with mean seasonal amplitude of 1.89‰, which rough...

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Bibliographic Details
Published in:Palaeogeography, palaeoclimatology, palaeoecology palaeoclimatology, palaeoecology, 2004-09, Vol.212 (1), p.1-22
Main Authors: Asami, Ryuji, Yamada, Tsutomu, Iryu, Yasufumi, Meyer, Christopher P., Quinn, Terrence M., Paulay, Gustav
Format: Article
Language:English
Subjects:
Coral
ENSO
Guam
Marine
Porites lobata
Stable isotopes
Western Pacific Warm Pool
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Summary:We examine the high-resolution (∼32 samples/year) carbon and oxygen isotopic composition (δ 13C coral and δ 18O coral) in a coral core ( Porites lobata) from Double Reef, Guam over the years 1980–2000. The δ 13C coral shows clear seasonal variations with mean seasonal amplitude of 1.89‰, which roughly corresponds with seasonal variations in solar radiation. The seasonal amplitude of δ 18O coral variations are small (0.23–0.57‰), but they are significantly correlated with sea surface temperature (SST) and salinity (SSS). The δ 18O coral and SST are more strongly correlated during El Niño/Southern Oscillation (ENSO) warm phases ( r=−0.81, p
ISSN:0031-0182
1872-616X
DOI:10.1016/j.palaeo.2004.05.014