期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 1, 页码 222-231出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL065074
关键词
Antarctic sea ice; ocean; ice shelf interaction; multifrequency EM; platelet ice
资金
- AWI logistics
- SNIC through Uppsala Multidisciplinary Center for Advanced Computational Science (UPPMAX) [snic2014-1-243]
- POLMAR graduate school
- German Research Council (DFG) [SPP1158, NI 1092/2, HE2740/12]
In Antarctica, ice crystals emerge from ice shelf cavities and accumulate in unconsolidated layers beneath nearby sea ice. Such sub-ice platelet layers form a unique habitat and serve as an indicator for the state of an ice shelf. However, the lack of a suitable methodology impedes an efficient quantification of this phenomenon on scales beyond point measurements. In this study, we inverted multifrequency electromagnetic (EM) induction soundings, obtained on fast ice with an underlying platelet layer along profiles of 100 km length in the eastern Weddell Sea. EM-derived platelet layer thickness and conductivity are consistent with other field observations. Our results suggest that platelet layer volume is higher than previously thought in this region and that platelet layer ice volume fraction is proportional to its thickness. We conclude that multifrequency EM is a suitable tool to determine platelet layer volume, with the potential to obtain crucial knowledge of associated processes in otherwise inaccessible ice shelf cavities.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据