Responses of Basal Melting of Antarctic Ice Shelves to the Climatic Forcing of the Last Glacial Maximum and CO2 Doubling

DOI PDF 被引用文献5件 参考文献99件
  • Takashi Obase
    Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan
  • Ayako Abe-Ouchi
    Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, and Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
  • Kazuya Kusahara
    Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Tasmania, Australia, and Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan
  • Hiroyasu Hasumi
    Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan
  • Rumi Ohgaito
    Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan

書誌事項

公開日
2017-04-19
資源種別
journal article
権利情報
  • http://www.ametsoc.org/PUBSReuseLicenses
DOI
  • 10.1175/jcli-d-15-0908.1
公開者
American Meteorological Society

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説明

<jats:title>Abstract</jats:title> <jats:p>Basal melting of the Antarctic ice shelves is an important factor in determining the stability of the Antarctic ice sheet. This study used the climatic outputs of an atmosphere–ocean general circulation model to force a circumpolar ocean model that resolves ice shelf cavity circulation to investigate the response of Antarctic ice shelf melting to different climatic conditions (i.e., to a doubling of CO2 and to the Last Glacial Maximum conditions). Sensitivity experiments were also conducted to investigate the roles of both surface atmospheric change and changes of oceanic lateral boundary conditions. It was found that the rate of change of basal melt due to climate warming is much greater (by an order of magnitude) than that due to cooling. This is mainly because the intrusion of warm water onto the continental shelves, linked to sea ice production and climate change, is crucial in determining the basal melt rate of many ice shelves. Sensitivity experiments showed that changes of atmospheric heat flux and ocean temperature are both important for warm and cold climates. The offshore wind change, together with atmospheric heat flux change, strongly affected the production of both sea ice and high-density water, preventing warmer water approaching the ice shelves under a colder climate. These results reflect the importance of both water mass formation in the Antarctic shelf seas and subsurface ocean temperature in understanding the long-term response to climate change of the melting of Antarctic ice shelves.</jats:p>

収録刊行物

  • Journal of Climate

    Journal of Climate 30 (10), 3473-3497, 2017-04-19

    American Meteorological Society

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