A high-resolution calibration of Sr/Ca thermometry using the Caribbean coral Montastraea annularis

摘要: [1] A relationship has been established between the Sr/Ca ratio in skeleton of scleractinian coral Montastraea annularis and sea surface water temperature south Florida. In order to obtain this correlation, specimens were transplanted a site at local reef where every two three months throughout 2-year period corals stained with Alizarin-red S temperature, which annually ranges ∼20° 30°C, was continually monitored. At end experimental sampled rate ∼50 samples per year, each sample corresponding only around 20 μg calcium carbonate. For 2.5-year period, exhibited excellent correlation first year (R2 = 0.83; (mmol/mol) 10.11 − 0.0452 × SST (°C)), but rather poorer second 0.68; 10.09 0.0406 (°C)). Averaging data into monthly values for 1, we determined (Sr/Ca 10.165 0.0471 (°C). On basis Sr/Ca, feel that is most accurate. Discrepancies are suggested arise from slight sampling errors relative stain lines.