Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999
Warming of the climate in the 20th century has been manifested by an ablation of Europe's largest ice cap, Vatnajökull in Iceland. The thin elastic lithosphere and the low-viscosity asthenosphere are responding to the reduction in mass by current land uplift in the vicinity of the ice cap sugge...
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fthighwire:oai:open-archive.highwire.org:gji:159/3/943 2023-05-15T16:38:06+02:00 Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 Sjöberg, Lars E. Pan, Ming Erlingsson, Sigurdur Asenjo, Erick Arnason, Kolbeinn 2004-12-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/159/3/943 https://doi.org/10.1111/j.1365-246X.2004.02353.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/159/3/943 http://dx.doi.org/10.1111/j.1365-246X.2004.02353.x Copyright (C) 2004, Oxford University Press Seismology TEXT 2004 fthighwire https://doi.org/10.1111/j.1365-246X.2004.02353.x 2013-05-26T17:39:56Z Warming of the climate in the 20th century has been manifested by an ablation of Europe's largest ice cap, Vatnajökull in Iceland. The thin elastic lithosphere and the low-viscosity asthenosphere are responding to the reduction in mass by current land uplift in the vicinity of the ice cap suggested to be of the order of 5–10 mm yr−1: lithosphere thickness and asthenosphere viscosities compatible with these values have been inferred. From our repeated GPS epoch campaigns in 1992, 1996 and 1999 uplift rates are estimated to be of the order of 5–19 mm yr−1, and the uplift rate is decreasing by −0.11 ± 0.01 mm yr−1 km−1 with radial distance from the centre of the ice cap. These results deviate from previous Earth rheology models estimated for the region. Our data indicate that the lithosphere thickness might be of the order of 10–20 km and the asthenosphere viscosity may be as low as 5 × 1017 Pa s, but these parameters need a careful fitting to the estimated uplift rates. Text Ice cap Iceland Vatnajökull HighWire Press (Stanford University) Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Geophysical Journal International 159 3 943 948 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Seismology |
spellingShingle |
Seismology Sjöberg, Lars E. Pan, Ming Erlingsson, Sigurdur Asenjo, Erick Arnason, Kolbeinn Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 |
topic_facet |
Seismology |
description |
Warming of the climate in the 20th century has been manifested by an ablation of Europe's largest ice cap, Vatnajökull in Iceland. The thin elastic lithosphere and the low-viscosity asthenosphere are responding to the reduction in mass by current land uplift in the vicinity of the ice cap suggested to be of the order of 5–10 mm yr−1: lithosphere thickness and asthenosphere viscosities compatible with these values have been inferred. From our repeated GPS epoch campaigns in 1992, 1996 and 1999 uplift rates are estimated to be of the order of 5–19 mm yr−1, and the uplift rate is decreasing by −0.11 ± 0.01 mm yr−1 km−1 with radial distance from the centre of the ice cap. These results deviate from previous Earth rheology models estimated for the region. Our data indicate that the lithosphere thickness might be of the order of 10–20 km and the asthenosphere viscosity may be as low as 5 × 1017 Pa s, but these parameters need a careful fitting to the estimated uplift rates. |
format |
Text |
author |
Sjöberg, Lars E. Pan, Ming Erlingsson, Sigurdur Asenjo, Erick Arnason, Kolbeinn |
author_facet |
Sjöberg, Lars E. Pan, Ming Erlingsson, Sigurdur Asenjo, Erick Arnason, Kolbeinn |
author_sort |
Sjöberg, Lars E. |
title |
Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 |
title_short |
Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 |
title_full |
Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 |
title_fullStr |
Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 |
title_full_unstemmed |
Land uplift near Vatnajokull, Iceland, as observed by GPS in 1992, 1996 and 1999 |
title_sort |
land uplift near vatnajokull, iceland, as observed by gps in 1992, 1996 and 1999 |
publisher |
Oxford University Press |
publishDate |
2004 |
url |
http://gji.oxfordjournals.org/cgi/content/short/159/3/943 https://doi.org/10.1111/j.1365-246X.2004.02353.x |
long_lat |
ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Vatnajökull |
geographic_facet |
Vatnajökull |
genre |
Ice cap Iceland Vatnajökull |
genre_facet |
Ice cap Iceland Vatnajökull |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/159/3/943 http://dx.doi.org/10.1111/j.1365-246X.2004.02353.x |
op_rights |
Copyright (C) 2004, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.2004.02353.x |
container_title |
Geophysical Journal International |
container_volume |
159 |
container_issue |
3 |
container_start_page |
943 |
op_container_end_page |
948 |
_version_ |
1766028391976271872 |