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Warm debate on early climate

机译:关于早期气候的热烈辩论

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摘要

Would Earth's early ocean have been a frozen wasteland had levels of atmospheric methane not been sky high? Maybe. Or maybe, according to a new view of an old idea, the main warming agent was carbon dioxide. For the first three-and-a-half billion years of Earth's history, the Sun burned only about 70-90% as brightly as it does today A famous paradox of ancient climate demands that we reconcile the persistence of a life-sustaining liquid ocean with these less-warming rays from a faint young Sun, The solution lies with greenhouse gases, which trap heat near the planet's sur face. In recent years, methane has become the favoured greenhouse agent, overcoming the earlier popularity of carbon dioxide in climate models spanning most of the Precambrian eon-- that is, during all of Earth's history up to about three-quarters of a billion years ago, after which life emerged on a large scale.
机译:如果大气中甲烷的含量没有天高,地球的早期海洋会成为冰冻的荒原吗?也许。也许,根据一个旧观念的新观点,主要的增暖剂是二氧化碳。在地球历史的前三个半年中,太阳仅燃烧了今天的约70-90%。著名的古代气候悖论要求我们调和维持生命的液态海洋的持久性利用微弱的年轻太阳发出的这些较不温暖的射线,解决方案在于温室气体,这些气体将热量收集在行星表面附近。近年来,甲烷已成为最受青睐的温室气体,它克服了二氧化碳在早于整个前寒武纪时代的气候模式中的普及程度,也就是说,在整个地球历史上,大约十亿年前的四分之三,之后,生活就大规模地出现了。

著录项

  • 来源
    《Nature》 |2004年第6990期|p.359-360|共2页
  • 作者

    Timothy W. Lyons;

  • 作者单位
  • 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
  • 中图分类 自然科学总论;
  • 关键词

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