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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
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Express Letter

Coral growth-rate insensitive Sr/Ca as a robust temperature recorder at the extreme latitudinal limits of Porites

SHOKO HIRABAYASHI, YUSUKE YOKOYAMA, ATSUSHI SUZUKI, YUTA KAWAKUBO, YOSUKE MIYAIRI, TAKASHI OKAI, SATOSHI NOJIMA
Geochemical Journal, Vol. 47, No. 3, P. e1-e5, 2013

ABSTRACT

Oxygen isotope values of low-growth coral (<5 mmyr) skeletons may reflect kinetic effects, which is problematic for sea surface temperature (sst) reconstruction. here, we report a srca-based sst reconstruction temperate Porites coral collected from Kyushu, Japan, near the northern latitudinal extent of hermatypic corals. Results indicate that Sr/Ca variations in a low-growth coral remain independent from growth rate, in contrast to the oxygen isotope ratios of the same coral.

KEYWORDS

skeletal oxygen isotope in the coral, Sr/Ca, high latitudes, coral growth rates

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