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Climate lessons

机译:气候课程

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摘要

Bolton and Stoll have developed a tool to reconstruct ancient carbon dioxide concentrations on the basis of differences in the carbon isotopic composition of large and small coccoliths. Their method is not a direct CO_2 barometer, but is based on what seems to be a threshold response of coccolithophores, which undergo a change in physiology as CO_2 levels increase above about 375-575 parts per million (p.p.m.). The authors used their approach to test directly whether CO_2 concentration has slowly decreased from higher levels 10 million to 12 million years (Myr) ago. With CO_2 levels currently on the rise, the answer has implications for future climate. The authors' work goes beyond being just another (much needed) approach to reconstructing CO_2 concentrations, and has implications for our understanding of how phytoplankton adapt to the world around them.
机译:Bolton和Stoll开发了一种工具,可根据大大小小球藻的碳同位素组成的差异来重建古代的二氧化碳浓度。他们的方法不是直接的CO_2晴雨表,而是基于球墨镜的阈值响应,随着CO_2含量增加到超过百万分之375-575(p.p.m.),生理发生变化。作者使用他们的方法直接测试了CO_2浓度是否已从1000万年前的较高水平缓慢降低到1200万年前(Myr)。随着目前CO_2水平的上升,答案对未来的气候有影响。作者的工作不仅是重构CO_2浓度的另一种(非常需要的)方法,而且对我们对浮游植物如何适应周围世界的理解也有影响。

著录项

  • 来源
    《Nature》 |2013年第7464期|532-532|共1页
  • 作者单位

    Organic Geochemistry Unit, The Cahot Institute, School of Chemistry,University of Bristol, Bristol BS8 1TS, UK;

    Organic Geochemistry Unit, The Cahot Institute, School of Chemistry,University of Bristol, Bristol BS8 1TS, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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