Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model
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 ad...
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| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2014
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/102564 https://ri.conicet.gov.ar/11336/31153 http://onlinelibrary.wiley.com/doi/10.1002/2013GL058419/abstract |
| Aporte de: |
| id |
I19-R120-10915-102564 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Astronomía Crustal uplift Earth model Glacial isostatic adjustment Southern patagonian icefield GNSS Geodesy ice loss |
| spellingShingle |
Astronomía Crustal uplift Earth model Glacial isostatic adjustment Southern patagonian icefield GNSS Geodesy ice loss Lange, H. Casassa, G. Ivins, E. R. Schröder, L. Fritsche, M. Richter, Andreas Jorg Groh, A. Dietrich, R. Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model |
| topic_facet |
Astronomía Crustal uplift Earth model Glacial isostatic adjustment Southern patagonian icefield GNSS Geodesy ice loss |
| description |
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 ×10<sup>18</sup> 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<sup>18</sup> 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. |
| format |
Articulo Articulo |
| author |
Lange, H. Casassa, G. Ivins, E. R. Schröder, L. Fritsche, M. Richter, Andreas Jorg Groh, A. Dietrich, R. |
| author_facet |
Lange, H. Casassa, G. Ivins, E. R. Schröder, L. Fritsche, M. Richter, Andreas Jorg Groh, A. Dietrich, R. |
| author_sort |
Lange, H. |
| title |
Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model |
| title_short |
Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model |
| title_full |
Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model |
| title_fullStr |
Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model |
| title_full_unstemmed |
Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model |
| title_sort |
observed crustal uplift near the southern patagonian icefield constrains improved viscoelastic earth model |
| publishDate |
2014 |
| url |
http://sedici.unlp.edu.ar/handle/10915/102564 https://ri.conicet.gov.ar/11336/31153 http://onlinelibrary.wiley.com/doi/10.1002/2013GL058419/abstract |
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Repositorios |
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