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首页> 外文期刊>Geophysical Research Letters >Recovery of temperature records from slow-growing corals by fine scale sampling of skeletons
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Recovery of temperature records from slow-growing corals by fine scale sampling of skeletons

机译：通过对骨骼进行精细采样，从生长缓慢的珊瑚中恢复温度记录

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We used laser ablation inductively coupled plasma mass spectrometry ( LA ICP-MS) to analyze Sr/Ca ratios in 5 colonies of the Atlantic corals, Diploria labyrinthiformis and Montastrea franski, each growing less than 5 mm yr(-1). By targeting the centers of septa we avoided thickening deposits to achieve an analytical sampling resolution of 5-10 days. The sensitivity of Sr/Ca to temperature (- 0.096 mmol/mol/degrees C) is similar to 3 times higher than previously reported for these species and equivalent to that exhibited by fast-growing Porites corals from the Indo-Pacific. The Sr/Ca-sea surface temperature (SST) calibrations derived from these corals were not statistically different and were independent of colony growth rate over the period studied. Data from 4 D. labyrinthiformis colonies were pooled to produce a single Sr/Ca-SST calibration with a calculated standard error on the predicted ocean temperature of +/- 0.51 degrees C. Applying our calibration to Sr/Ca analyses of D. labyrinthiformis skeleton deposited in the late 18th century indicated that average annual sea surface temperatures around Bermuda were similar to 1 degrees C cooler than today.
机译：我们使用激光消融电感耦合等离子体质谱法（LA ICP-MS）分析了大西洋珊瑚，大梁双翅目和Montastrea franski的5个菌落中Sr / Ca的比率，每个菌落的生长时间均小于5 mm yr（-1）。通过针对隔垫的中心，我们避免了沉积物的增厚，以达到5-10天的分析采样分辨率。 Sr / Ca对温度（-0.096 mmol / mol /℃）的敏感性比以前报道的这些物种高3倍，与印度太平洋快速生长的Porites珊瑚所表现出的敏感性相当。从这些珊瑚获得的Sr / Ca-海面温度（SST）校准值在统计上没有差异，并且与研究期间的菌落生长速率无关。合并来自4个唇形线虫菌落的数据，以产生单个Sr / Ca-SST标定，并在+/- 0.51摄氏度的预测海洋温度下计算出标准误差。将我们的标定应用于对唇形线虫的骨架的Sr / Ca分析18世纪末的沉积表明，百慕大周围的年平均海表温度比今天的温度低1摄氏度。

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