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DOI | 10.1029/2021GL094872 |
Ice-shelf basal melt channels stabilized by secondary flow | |
M. G. Wearing; L. A. Stevens; P. Dutrieux; J. Kingslake | |
2021-10-16 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Ice-shelf basal channels form due to concentrated submarine melting. They are present in many Antarctic ice shelves and can reduce ice-shelf structural integrity, potentially destabilizing ice shelves by full-depth incision. Here, we describe the viscous ice response to a basal channel - secondary flow - which acts perpendicular to the channel axis and is induced by gradients in ice thickness. We use a full-Stokes ice-flow model to systematically assess the transient evolution of a basal channel in the presence of melting. Secondary flow increases with channel size and reduces the rate of channel incision, such that linear extrapolation or the Shallow-Shelf Approximation cannot project future channel evolution. For thick ice shelves ( m) secondary flow potentially stabilizes the channel, but is insufficient to significantly delay breakthrough for thinner ice ( m). Using synthetic data, we assess the impact of secondary flow when inferring basal-channel melt rates from satellite observations. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/340052 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. G. Wearing,L. A. Stevens,P. Dutrieux,et al. Ice-shelf basal melt channels stabilized by secondary flow[J]. Geophysical Research Letters,2021. |
APA | M. G. Wearing,L. A. Stevens,P. Dutrieux,&J. Kingslake.(2021).Ice-shelf basal melt channels stabilized by secondary flow.Geophysical Research Letters. |
MLA | M. G. Wearing,et al."Ice-shelf basal melt channels stabilized by secondary flow".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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