Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2023757118 |
Observing the subglacial hydrology network and its dynamics with a dense seismic array | |
Ugo Nanni; Florent Gimbert; Philippe Roux; Albanne Lecointre | |
2021-07-13 | |
发表期刊 | Proceedings of the National Academy of Science
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出版年 | 2021 |
英文摘要 | Subglacial water flow strongly modulates glacier basal motion, which itself strongly influences the contributions of glaciers and ice sheets to sea level rise. However, our understanding of when and where subglacial water flow enhances or impedes glacier flow is limited due to the paucity of direct observations of subglacial drainage characteristics. Here, we demonstrate that dense seismic array observations combined with an innovative systematic seismic source location technique allows the retrieval of a two-dimensional map of a subglacial drainage system, as well as its day-to-day temporal evolution. We observe with unprecedented detail when and where subglacial water flows through a cavity-like system that enhances glacier flow versus when and where water mainly flows through a channel-like system that impedes glacier flow. Most importantly, we are able to identify regions of high hydraulic connectivity within and across the cavity and channel systems, which have been identified as having a major impact on the long-term glacier response to climate warming. Applying a similar seismic monitoring strategy in other glacier settings, including for ice sheets, may help to diagnose the susceptibility of their dynamics to increased meltwater input due to climate warming. |
领域 | 地球科学 |
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/333927 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Ugo Nanni,Florent Gimbert,Philippe Roux,et al. Observing the subglacial hydrology network and its dynamics with a dense seismic array[J]. Proceedings of the National Academy of Science,2021. |
APA | Ugo Nanni,Florent Gimbert,Philippe Roux,&Albanne Lecointre.(2021).Observing the subglacial hydrology network and its dynamics with a dense seismic array.Proceedings of the National Academy of Science. |
MLA | Ugo Nanni,et al."Observing the subglacial hydrology network and its dynamics with a dense seismic array".Proceedings of the National Academy of Science (2021). |
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