Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090597 |
Breaking the ice: Identifying hydraulically‐forced crevassing | |
T. S. Hudson; A. M. Brisbourne; R. S. White; J. M. Kendall; R. Arthern; A. M. Smith | |
2020-10-19 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Hydraulically‐forced crevassing is thought to reduce the stability of ice shelves and ice sheets, affecting structural integrity and providing pathways for surface meltwater to the bed. It can cause ice shelves to collapse and ice sheets to accelerate into the ocean. However, direct observations of the hydraulically‐forced crevassing process remain elusive. Here we report a novel method and observations that use icequakes to directly observe crevassing and determine the role of hydrofracture. Crevasse icequake depths from seismic observations are compared to a theoretically derived maximum‐dry‐crevasse‐depth. We observe icequakes below this depth, suggesting hydrofracture. Furthermore, icequake source mechanisms provide insight into the fracture process, with predominantly opening cracks observed, which have opening volumes of hundredths of a cubic meter. Our method and findings provide a framework for studying a critical process that is key for the stability of ice shelves and ice sheets, and therefore future sea‐level rise projections. |
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/300197 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | T. S. Hudson,A. M. Brisbourne,R. S. White,等. Breaking the ice: Identifying hydraulically‐forced crevassing[J]. Geophysical Research Letters,2020. |
APA | T. S. Hudson,A. M. Brisbourne,R. S. White,J. M. Kendall,R. Arthern,&A. M. Smith.(2020).Breaking the ice: Identifying hydraulically‐forced crevassing.Geophysical Research Letters. |
MLA | T. S. Hudson,et al."Breaking the ice: Identifying hydraulically‐forced crevassing".Geophysical Research Letters (2020). |
条目包含的文件 | 条目无相关文件。 |
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