| DOI: | 10.1002/2015GL064590
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| 论文题名: | Subglacial discharge at tidewater glaciers revealed by seismic tremor |
| 作者: | Bartholomaus T.C.; Amundson J.M.; Walter J.I.; O'Neel S.; West M.E.; Larsen C.F.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8638
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| EISSN: | 1944-8369
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| 出版年: | 2015
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| 卷: | 42, 期:15 | | 起始页码: | 6391
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| 结束页码: | 6398
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| 语种: | 英语
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| 英文关键词: | glacier hydrology
; ice/ocean interactions
; seismic tremor
; subglacial discharge
; submarine melt
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| Scopus关键词: | Balloons
; Digital storage
; Ecosystems
; Submarines
; Central component
; Drainage efficiency
; Glacier hydrology
; Marine ecosystem
; Pro-glacial
; Seasonal variation
; Seismic tremor
; Tidewater glaciers
; Seismology
; depositional environment
; discharge
; fjord
; glacial hydrology
; ice-ocean interaction
; marine ecosystem
; melt
; proglacial environment
; seasonal variation
; subglacial environment
; tidewater glacier
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| 英文摘要: | Subglacial discharge influences glacier basal motion and erodes and redeposits sediment. At tidewater glacier termini, discharge drives submarine terminus melting, affects fjord circulation, and is a central component of proglacial marine ecosystems. However, our present inability to track subglacial discharge and its variability significantly hinders our understanding of these processes. Here we report observations of hourly to seasonal variations in 1.5-10 Hz seismic tremor that strongly correlate with subglacial discharge but not with basal motion, weather, or discrete icequakes. Our data demonstrate that vigorous discharge occurs from tidewater glaciers during summer, in spite of fast basal motion that could limit the formation of subglacial conduits, and then abates during winter. Furthermore, tremor observations and a melt model demonstrate that drainage efficiency of tidewater glaciers evolves seasonally. Glaciohydraulic tremor provides a means by which to quantify subglacial discharge variations and offers a promising window into otherwise obscured glacierized environments. ©2015. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940446687&doi=10.1002%2f2015GL064590&partnerID=40&md5=3eb8a4e31b1b4a5725662c183da49e64
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8254
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Institute for Geophysics, University of Texas at Austin, Austin, TX, United States
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| Recommended Citation: | |
Bartholomaus T.C.,Amundson J.M.,Walter J.I.,et al. Subglacial discharge at tidewater glaciers revealed by seismic tremor[J]. Geophysical Research Letters,2015-01-01,42(15).
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