• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Recent Antarctic Peninsula warming relative to Holocene climate and ice-shelf history
【24h】

Recent Antarctic Peninsula warming relative to Holocene climate and ice-shelf history

机译：与全新世气候和冰架历史有关的南极半岛最近的变暖

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rapid warming over the past 50 years on the Antarctic Peninsula is associated with the collapse of a number of ice shelves and accelerating glacier mass loss. In contrast, warming has been comparatively modest over West Antarctica and significant changes have not been observed over most of East Antarctica, suggesting that the ice-core palaeoclimate records available from these areas may not be representative of the climate history of the Antarctic Peninsula. Here we show that the Antarctic Peninsula experienced an early-Holocene warm period followed by stable temperatures, from about 9,200 to 2,500 years ago, that were similar to modern-day levels. Our temperature estimates are based on an ice-core record of deuterium variations from James Ross Island, off the northeastern tip of the Antarctic Peninsula. We find that the late-Holocene development of ice shelves near James Ross Island was coincident with pronounced cooling from 2,500 to 600 years ago. This cooling was part of a millennial-scale climate excursion with opposing anomalies on the eastern and western sides of the Antarctic Peninsula. Although warming of the northeastern Antarctic Peninsula began around 600 years ago, the high rate of warming over the past century is unusual (but not unprecedented) in the context of natural climate variability over the past two millennia. The connection shown here between past temperature and ice-shelf stability suggests that warming for several centuries rendered ice shelves on the northeastern Antarctic Peninsula vulnerable to collapse. Continued warming to temperatures that now exceed the stable conditions of most of the Holocene epoch is likely to cause ice-shelf instability to encroach farther southward alone the Antarctic Peninsula.
机译：在过去的50年中，南极半岛的快速变暖与许多冰架的坍塌和冰川质量的损失加速有关。相反，南极西部地区的变暖相对较小，而南极东部的大部分地区也未观察到明显的变化，这表明从这些地区可获得的冰芯古气候记录可能不能代表南极半岛的气候历史。在这里，我们表明，南极半岛经历了全新世早期的暖期，随后是大约9200至2500年前的稳定温度，该温度与现代水平相似。我们的温度估算是基于南极半岛东北端詹姆斯·罗斯岛（James Ross Island）氘的冰芯记录。我们发现，詹姆斯罗斯岛附近冰架的晚期全新世发展与2500至600年前的明显降温相吻合。这次降温是千禧年规模气候漂移的一部分，南极半岛东西两侧的异常情况相反。尽管东北南极半岛的变暖始于大约600年前，但在过去两千年中自然气候变化的背景下，过去一个世纪的高变暖率是不寻常的（但并非史无前例）。这里显示的过去温度与冰架稳定性之间的联系表明，几个世纪以来的变暖使南极东北部的冰架容易崩溃。持续变暖到现在已超过全新世大部分时期的稳定条件的温度，很可能会导致冰架的不稳定，从而使南极半岛进一步向南蔓延。

著录项

  • 来源
    《Nature》 |2012年第7414期|p.141-144|共4页
  • 作者

    Robert Mulvaney; Nerilie J. Abram; Richard C. A. Hindmarsh; Carol Arrowsmith; Louise Fleet; Jack Triest; Louise C. Sime; Olivier Alemany; Susan Foord;

  • 作者单位

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, UK;

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, UK Research School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 0200, Australia;

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, UK;

    NERC Isotope Geosciences Laboratory, Keyworth NG12 5GG, UK;

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, UK;

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, UK;

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, UK;

    UJF- Grenoble 1/CNRS, Laboratoire de Glaciologie et Geophysique de I'Environnement (LGGE) UMR 5183, Grenoble F-38041, France;

    British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 OET, 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
  • 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