首页    期刊浏览 2024年07月18日 星期四
登录注册

文章基本信息

  • 标题:Glaciers in equilibrium, McMurdo Dry Valleys, Antarctica
  • 本地全文:下载
  • 作者:ANDREW G. FOUNTAIN ; HASSAN J. BASAGIC ; SPENCER NIEBUHR
  • 期刊名称:Journal of Glaciology
  • 印刷版ISSN:0022-1430
  • 电子版ISSN:1727-5652
  • 出版年度:2016
  • 卷号:62
  • 期号:235
  • 页码:976-989
  • DOI:10.1017/jog.2016.86
  • 出版社:Cambridge University Press
  • 摘要:ABSTRACT The McMurdo Dry Valleys are a cold, dry polar desert and the alpine glaciers therein exhibit small annual and seasonal mass balances, often <±0.06 m w.e. Typically, winter is the accumulation season, but significant snow storms can occur any time of year occasionally making summer the accumulation season. The yearly equilibrium line altitude is poorly correlated with mass balance because the elevation gradient of mass balance on each glacier can change dramatically from year to year. Most likely, winds redistribute the light snowfall disrupting the normal gradient of increasing mass balance with elevation. Reconstructed cumulative mass balance shows that the glaciers have lost <2 m w.e. over the past half century and area changes show minimal retreat. In most cases these changes are less than the uncertainty and the glaciers are considered in equilibrium. Since 2000, however, the glaciers have lost mass despite relatively stable summer air temperatures suggesting a different mechanism in play. Whether this trend is a harbinger of future changes or a temporary excursion is unclear.
  • 关键词:Antarctica; glaciers; mass balance
国家哲学社会科学文献中心版权所有