| DOI: | 10.1002/2013GL058419
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| 论文题名: | Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth models |
| 作者: | Lange H.; Casassa G.; Ivins E.R.; Schröder L.; Fritsche M.; Richter A.; Groh A.; Dietrich R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10403
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| EISSN: | 1944-10134
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| 出版年: | 2014
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| 卷: | 41, 期:3 | | 起始页码: | 805
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| 结束页码: | 812
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| 语种: | 英语
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| 英文关键词: | crustal uplift
; Earth model
; glacial isostatic adjustment
; GNSS Geodesy
; ice loss
; Southern Patagonian Icefield
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| Scopus关键词: | Crustal uplift
; Earth models
; Glacial Isostatic Adjustments
; Ice loss
; Southern Patagonian Icefield
; Geodesy
; Geodetic satellites
; Viscoelasticity
; Viscosity
; Ice
; geodetic datum
; GPS
; GRACE
; gravity
; ice field
; isostasy
; Little Ice Age
; measurement method
; numerical model
; uplift
; viscoelasticity
; Patagonia
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| 英文摘要: | Thirty-one GPS geodetic measurements of crustal uplift in southernmost South America determined extraordinarily high trend rates (> 35 mm/yr) in the north-central part of the Southern Patagonian Icefield. These trends have a coherent pattern, motivating a refined viscoelastic glacial isostatic adjustment model to explain the observations. Two end-member models provide good fits: both require a lithospheric thickness of 36.5 ± 5.3 km. However, one end-member has a mantle viscosity near η =1.6 ×1018 Pa s and an ice collapse rate from the Little Ice Age (LIA) maximum comparable to a lowest recent estimate of 1995-2012 ice loss at about -11 Gt/yr. In contrast, the other end-member has much larger viscosity: η = 8.0 ×10 18 Pa s, half the post-LIA collapse rate, and a steadily rising loss rate in the twentieth century after AD 1943, reaching -25.9 Gt/yr during 1995-2012. Key Points Post-Little Ice Age load changes cause viscoelastic GIA response GPS results improve knowledge of ice load history since LIA and Earth model Gravity changes from the load changes and GIA influence interpretations of GRACE ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896779997&doi=10.1002%2f2013GL058419&partnerID=40&md5=209bbe527dfbc03983afe6a2f1dfc110
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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/7667
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Institut für Planetare Geodäsie, Technische Universität Dresden, Dresden, Germany
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| Recommended Citation: | |
Lange H.,Casassa G.,Ivins E.R.,et al. Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth models[J]. Geophysical Research Letters,2014-01-01,41(3).
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