首页> 外文期刊>Nature >Climate sensitivity in a warmer world
【24h】

Climate sensitivity in a warmer world

机译:温暖世界中的气候敏感性

获取原文
获取原文并翻译 | 示例
           

摘要

A major concern in projecting future climate change using models is that positive climate feedbacks might become enhanced in a warm climate, accelerating future warming in response to rising greenhouse-gas levels. Climate feedbacks are changes in atmospheric or surface properties induced by climate change that magnify or diminish the overall temperature response. Their aggregate strength is represented by the climate sensitivity, which is the ratio of observed warming to climate forcing, such as increasing atmospheric carbon dioxide levels. Warm intervals of Earths recent geological past, which can be studied through climate proxies, provide a basis for testing the response of climate sensitivity to warming. On page 49 of this issue, Martinez-Boti et al. use improved proxy atmospheric CO_2 data to compare climate-sensitivity determinations from the warm Pliocene epoch, 5.3 million to 2.6 million years (Myr) ago, to those from the cold, extensively glaciated Pleistocene epoch, 2.6 to 0.012 Myr ago. They find that climate sensitivity differs little between these vastly dissimilar times, once the influence of ice sheets is removed.
机译:使用模型预测未来气候变化的一个主要问题是,在温暖的气候下,积极的气候反馈可能会增强,随着温室气体水平的上升,未来的气候变暖会加速。气候反馈是由气候变化引起的大气或表面特性的变化,这些变化会放大或减小整体温度响应。它们的总强度由气候敏感性表示,这是观测到的变暖与强迫气候(例如大气中二氧化碳含量增加)的比率。可以通过气候代理研究地球最近地质过去的温暖间隔,为测试气候敏感性对变暖的响应提供了基础。在本期杂志的第49页上,Martinez-Boti等人。使用改进的代理大气CO_2数据来比较530万到260万年前(上新世)温暖的上新世时期与2.6到0.012 Myr之前的冷,广泛冰期的更新世时期的气候敏感性测定。他们发现,一旦消除冰盖的影响,在这两个截然不同的时间之间,气候敏感性差异就很小。

著录项

  • 来源
    《Nature》 |2015年第7537期|46-47|共2页
  • 作者

    DAVID W. LEA;

  • 作者单位

    Department of Earth Science, University of California, Santa Barbara, California 93106-9630, USA;

  • 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
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号