概括
珊瑚骨记录温度使用与的比率在他们的阿拉贡石骨. 这种方法允许仔细重建过去的海洋温度.
科学领域:
- 海洋生物学 海洋生物学
- 地质化学 地质化学
- 古气候学 古气候学
背景情况:
- 珊瑚礁构建珊瑚沉了阿拉贡石骨.
- 骨的组成可以反映环境条件.
- 了解元素的结合是古气候代理的关键.
研究的目的:
- 调查珊瑚阿拉贡石中 (Sr) 与 (Ca) 的比率以及环境因素之间的关系.
- 为了确定珊瑚阿拉戈尼特的Sr/Ca比率是否可以作为过去温度的代理值.
- 为了比较Sr/Ca分离在生物原体阿拉贡石与无机阿拉贡石.
主要方法:
- 在受控温度和海水Sr/Ca比率下培养三种礁石造型珊瑚.
- 测量了沉的骨阿拉贡石中的Sr/Ca比率.
- 在珊瑚阿拉贡石中分析Sr/Ca的分布系数.
主要成果:
- 珊瑚骨架阿拉戈尼特中的Sr/Ca比率是温度和周围水的Sr/Ca比率的简单函数.
- 在珊瑚阿拉贡石中Sr/Ca的分布系数不同于无机沉的阿拉贡石.
- 珊瑚骨显示出作为过去环境温度的可靠记录器的潜力.
结论:
- 珊瑚阿拉戈尼特的Sr/Ca比率对温度敏感,使它们成为有价值的古热度计.
- 珊瑚中的生物原始阿拉贡石形成涉及与无机沉不同的分区机制.
- 经过仔细的校准,珊瑚骨可以作为过去海面温度的准确档案.
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