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DOI | 10.1038/s41467-019-13539-x |
Seawater softening of suture zones inhibits fracture propagation in Antarctic ice shelves | |
[unavailable] | |
2019-12-02 | |
发表期刊 | Nature Communications |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
英文摘要 | Suture zones are abundant on Antarctic ice shelves and widely observed to impede fracture propagation, greatly enhancing ice-shelf stability. Using seismic and radar observations on the Larsen C Ice Shelf聽of the Antarctic Peninsula, we confirm that such zones are highly heterogeneous, consisting of multiple meteoric and marine ice bodies of diverse provenance fused together. Here we demonstrate that fracture detainment is predominantly controlled by enhanced seawater content in suture zones, rather than by enhanced temperature as previously thought. We show that interstitial seawater can reduce fracture-driving stress by orders of magnitude, promoting both viscous relaxation and the development of micro cracks, the incidence of which scales inversely with stress intensity. We show how simple analysis of viscous buckles in ice-penetrating radar data can quantify the seawater content of suture zones and their modification of the ice-shelf鈥檚 stress regime. By limiting fracture, enhancing stability and restraining continental ice discharge into the ocean, suture zones act as vital regulators of Antarctic mass balance. |
领域 | 资源环境 |
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/232456 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | [unavailable]. Seawater softening of suture zones inhibits fracture propagation in Antarctic ice shelves[J]. Nature Communications,2019,10. |
APA | [unavailable].(2019).Seawater softening of suture zones inhibits fracture propagation in Antarctic ice shelves.Nature Communications,10. |
MLA | [unavailable]."Seawater softening of suture zones inhibits fracture propagation in Antarctic ice shelves".Nature Communications 10(2019). |
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