Calibration of sclerosponge oxygen isotope records to temperature using high-resolution δ18O data
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چکیده
A revised calibration is presented relating the oxygen isotope composition of the aragonite-secreting sclerosponge Ceratoporella nicholsoni, oxygen isotope composition of seawater, and ambient water temperature. This new relationship has been obtained using high-resolution dO data measured in sclerosponges from the Bahamas and Jamaica compared to ambient temperature measurements and dO values of seawater from the two locations, both measured and published. New data improve an existing calibration which was determined using measurements of salinity rather than directly measured dO values of the seawater and was composed of measurements from different species of sclerosponge and other aragonite-secreting organisms. The updated calibration (n = 12, r = 0.95) is:
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تاریخ انتشار 2009