3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees
We present a new 3-D GPS velocity solution for 182 sites for the region encompassing the Western Alps, Pyrenees, and southern France. The velocity field is based on a Precise Point Positioning (PPP) solution, to which we apply a common-mode filter, defined by the 26 longest time series, in order to...
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Copernicus Publications
2016
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00043266 2023-05-15T16:38:20+02:00 3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees Nguyen, Hai Ninh Vernant, Philippe Mazzotti, Stephane Khazaradze, Giorgi Asensio, Eva 2016-09 electronic https://doi.org/10.5194/se-7-1349-2016 https://noa.gwlb.de/receive/cop_mods_00043266 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042886/se-7-1349-2016.pdf https://se.copernicus.org/articles/7/1349/2016/se-7-1349-2016.pdf eng eng Copernicus Publications Solid Earth -- 1869-9529 https://doi.org/10.5194/se-7-1349-2016 https://noa.gwlb.de/receive/cop_mods_00043266 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042886/se-7-1349-2016.pdf https://se.copernicus.org/articles/7/1349/2016/se-7-1349-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/se-7-1349-2016 2022-02-08T22:40:40Z We present a new 3-D GPS velocity solution for 182 sites for the region encompassing the Western Alps, Pyrenees, and southern France. The velocity field is based on a Precise Point Positioning (PPP) solution, to which we apply a common-mode filter, defined by the 26 longest time series, in order to correct for network-wide biases (reference frame, unmodeled large-scale processes, etc.). We show that processing parameters, such as troposphere delay modeling, can lead to systematic velocity variations of 0.1–0.5 mm yr−1 affecting both accuracy and precision, especially for short (< 5 years) time series. A velocity convergence analysis shows that minimum time-series lengths of ∼ 3 and ∼ 5.5 years are required to reach a velocity stability of 0.5 mm yr−1 in the horizontal and vertical components, respectively. On average, horizontal residual velocities show a stability of ∼ 0.2 mm yr−1 in the Western Alps, Pyrenees, and southern France. The only significant horizontal strain rate signal is in the western Pyrenees with up to 4 × 10−9 yr−1 NNE–SSW extension, whereas no significant strain rates are detected in the Western Alps (< 1 × 10−9 yr−1). In contrast, we identify significant uplift rates up to 2 mm yr−1 in the Western Alps but not in the Pyrenees (0.1 ± 0.2 mm yr−1). A correlation between site elevations and fast uplift rates in the northern part of the Western Alps, in the region of the Würmian ice cap, suggests that part of this uplift is induced by postglacial rebound. The very slow uplift rates in the southern Western Alps and in the Pyrenees could be accounted for by erosion-induced rebound. Article in Journal/Newspaper Ice cap Niedersächsisches Online-Archiv NOA Solid Earth 7 5 1349 1363 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Nguyen, Hai Ninh Vernant, Philippe Mazzotti, Stephane Khazaradze, Giorgi Asensio, Eva 3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees |
topic_facet |
article Verlagsveröffentlichung |
description |
We present a new 3-D GPS velocity solution for 182 sites for the region encompassing the Western Alps, Pyrenees, and southern France. The velocity field is based on a Precise Point Positioning (PPP) solution, to which we apply a common-mode filter, defined by the 26 longest time series, in order to correct for network-wide biases (reference frame, unmodeled large-scale processes, etc.). We show that processing parameters, such as troposphere delay modeling, can lead to systematic velocity variations of 0.1–0.5 mm yr−1 affecting both accuracy and precision, especially for short (< 5 years) time series. A velocity convergence analysis shows that minimum time-series lengths of ∼ 3 and ∼ 5.5 years are required to reach a velocity stability of 0.5 mm yr−1 in the horizontal and vertical components, respectively. On average, horizontal residual velocities show a stability of ∼ 0.2 mm yr−1 in the Western Alps, Pyrenees, and southern France. The only significant horizontal strain rate signal is in the western Pyrenees with up to 4 × 10−9 yr−1 NNE–SSW extension, whereas no significant strain rates are detected in the Western Alps (< 1 × 10−9 yr−1). In contrast, we identify significant uplift rates up to 2 mm yr−1 in the Western Alps but not in the Pyrenees (0.1 ± 0.2 mm yr−1). A correlation between site elevations and fast uplift rates in the northern part of the Western Alps, in the region of the Würmian ice cap, suggests that part of this uplift is induced by postglacial rebound. The very slow uplift rates in the southern Western Alps and in the Pyrenees could be accounted for by erosion-induced rebound. |
format |
Article in Journal/Newspaper |
author |
Nguyen, Hai Ninh Vernant, Philippe Mazzotti, Stephane Khazaradze, Giorgi Asensio, Eva |
author_facet |
Nguyen, Hai Ninh Vernant, Philippe Mazzotti, Stephane Khazaradze, Giorgi Asensio, Eva |
author_sort |
Nguyen, Hai Ninh |
title |
3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees |
title_short |
3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees |
title_full |
3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees |
title_fullStr |
3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees |
title_full_unstemmed |
3-D GPS velocity field and its implications on the present-day post-orogenic deformation of the Western Alps and Pyrenees |
title_sort |
3-d gps velocity field and its implications on the present-day post-orogenic deformation of the western alps and pyrenees |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/se-7-1349-2016 https://noa.gwlb.de/receive/cop_mods_00043266 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042886/se-7-1349-2016.pdf https://se.copernicus.org/articles/7/1349/2016/se-7-1349-2016.pdf |
genre |
Ice cap |
genre_facet |
Ice cap |
op_relation |
Solid Earth -- 1869-9529 https://doi.org/10.5194/se-7-1349-2016 https://noa.gwlb.de/receive/cop_mods_00043266 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042886/se-7-1349-2016.pdf https://se.copernicus.org/articles/7/1349/2016/se-7-1349-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/se-7-1349-2016 |
container_title |
Solid Earth |
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7 |
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5 |
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1349 |
op_container_end_page |
1363 |
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1766028616975515648 |