| DOI: | 10.1002/2014GL062806
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| 论文题名: | Dynamic perennial firn aquifer on an Arctic glacier |
| 作者: | Christianson K.; Kohler J.; Alley R.B.; Nuth C.; Van Pelt W.J.J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8908
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| EISSN: | 1944-8639
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| 出版年: | 2015
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| 卷: | 42, 期:5 | | 起始页码: | 1418
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| 结束页码: | 1426
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| 语种: | 英语
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| 英文关键词: | firn aquifer
; glacier hydrology
; ice sheet dynamics
; ice-penetrating radar
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| Scopus关键词: | Aquifers
; Glaciers
; Groundwater
; Hydrology
; Permittivity
; Radar
; Reflection
; Stratigraphy
; Accumulation layers
; Dielectric permittivities
; Glacier hydrology
; Ice sheet dynamics
; Penetrating radar
; Radar reflectors
; Snow stratigraphy
; Surface forcing
; Ice
; aquifer characterization
; dielectric property
; glacier flow
; GPS
; ground penetrating radar
; ice field
; ice sheet
; water table
; Arctic
; Greenland
; Svalbard
; Svalbard and Jan Mayen
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| 英文摘要: | Ice-penetrating radar and GPS observations reveal a perennial firn aquifer (PFA) on a Svalbard ice field, similar to those recently discovered in southeastern Greenland. A bright, widespread radar reflector separates relatively dry and water-saturated firn. This surface, the phreatic firn water table, is deeper beneath local surface elevation maxima, shallower in surface lows, and steeper where the surface is steep. The reflector crosscuts snow stratigraphy; we use the apparent deflection of accumulation layers due to the higher dielectric permittivity below the water table to infer that the firn pore space becomes progressively more saturated as depth increases. Our observations indicate that PFAs respond rapidly (subannually) to surface forcing, and are capable of providing significant input to the englacial hydrology system. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925850240&doi=10.1002%2f2014GL062806&partnerID=40&md5=f0d0390ddd4592997229754b22adb2a4
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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/8524
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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: | Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States
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| Recommended Citation: | |
Christianson K.,Kohler J.,Alley R.B.,et al. Dynamic perennial firn aquifer on an Arctic glacier[J]. Geophysical Research Letters,2015-01-01,42(5).
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