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| CORALS AND SCLEROSPONGES | ||||||||||
Pedro Bank, Exuma Sound - Sclerosponge Sr/Ca Temperature Calibration Data |
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Rosenheim, B.E., P.K. Swart, S.R. Thorrold, P. Willenz, L. Berry, and C. Latkoczy. 2004. High resolution Sr/Ca records in sclerosponges calibrated to temperature in situ. Geology, Vol. 32, No. 2, pp. 145-148, February 2004.
Start Year: 1890 AD End Year: 1990 AD Data: Please Cite Data Contributors! atlantic/sclero-srca-calib2004.txt |
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Summary:Ratios of strontium to calcium have been analyzed by laser-ablation inductively coupled plasma–mass spectrometry (LA-ICP-MS) in a skeletal section of the sclerosponge Ceratoporella nicholsoni. The growth period, representative of 3 yr, was stained in the skeleton with a fluorochrome (calcein). Temperatures were recorded at 2 h intervals within the shallow, cryptic reef enclosure that the sclerosponge inhabited on the northern coast of Jamaica, allowing the formulation of a direct empirical relationship between Sr/Ca and temperature. To verify this calibration, Sr/Ca ratios of two sclerosponges of the same species from depths of 67 m and 136 m in Exuma Sound, Bahamas, were analyzed by LA-ICP-MS and compared to the temperatures from these depths over a decade prior to collection. The result is an independently verified, high-resolution empirical calibration for the temperature sensitivity of Sr/Ca ratios in the aragonite skeletons of sclerosponges from Jamaica and the Bahamas. The calibration is a first for C. nicholsoni and indicates that sclerosponges are more sensitive temperature recorders than zooxanthellate corals. It represents an important step in establishing skeletal geochemistry of sclerosponges as a proxy of temperature in the upper 250 m of the ocean.More Info on Corals and Sclerosponges |
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Parameters:SrCa; SST |
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Complete XML Record:noaa-coral-1921 (Last Revised: 2007-09-05 ) |
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