| DOI: | 10.1002/2015GL065778
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| 论文题名: | Noble gas signatures in Greenland: Tracing glacial meltwater sources |
| 作者: | Niu Y.; Clara Castro M.; Aciego S.M.; Hall C.M.; Stevenson E.I.; Arendt C.A.; Das S.B.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8441
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| EISSN: | 1944-8172
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| 出版年: | 2015
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| 卷: | 42, 期:21 | | 起始页码: | 9311
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| 结束页码: | 9318
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| 语种: | 英语
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| 英文关键词: | glacial meltwater
; Greenland
; noble gases
; water residence times
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| Scopus关键词: | Glacial geology
; Groundwater
; Atmospheric components
; Component analysis
; Glacial meltwater
; Greenland
; Greenland Ice Sheet
; Residence time
; Surface collection
; Surface conditions
; Inert gases
; altitude
; atmospheric chemistry
; basal melting
; helium
; meltwater
; neon
; precipitation (climatology)
; residence time
; temperature
; xenon
; Arctic
; Greenland
; Greenland Ice Sheet
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| 英文摘要: | This study represents the first comprehensive noble gas study in glacial meltwater from the Greenland Ice Sheet. It shows that most samples are in disequilibrium with surface collection conditions. A preliminary Ne and Xe analysis suggests that about half of the samples equilibrated at a temperature of ~0°C and altitudes between 1000 m and 2000 m, with a few samples pointing to lower equilibration altitudes and temperatures between 2°C and 5°C. Two samples suggest an origin as melted ice and complete lack of equilibration with surface conditions. A helium component analysis suggests that this glacial meltwater was isolated from the atmosphere prior to the 1950s, with most samples yielding residence times ≤ 420 years. Most samples represent a mixture between a dominant atmospheric component originating as precipitation and basal meltwater or groundwater, which has accumulated crustal 4He over time. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84954536085&doi=10.1002%2f2015GL065778&partnerID=40&md5=ea948b5dbe944e6865825f4308b26e08
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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/8057
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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 Environmental Sciences, University of Michigan, Ann Arbor, MI, United States
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| Recommended Citation: | |
Niu Y.,Clara Castro M.,Aciego S.M.,et al. Noble gas signatures in Greenland: Tracing glacial meltwater sources[J]. Geophysical Research Letters,2015-01-01,42(21).
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