Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys
The monitoring of crustal motions in Northern Victoria Land (NVL) of Antarctica by means of episodic GPS stations (EGPSs) provides an accurate and dense (∼50-km spaced) velocity field. The data, gathered starting in Austral summer 1999, derive from a series of benchmarks belonging to the Victoria La...
Published in: | Geophysical Journal International |
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Online Access: | http://hdl.handle.net/11577/2716099 https://doi.org/10.1111/j.1365-246X.2012.05403.x |
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ftunivpadovairis:oai:www.research.unipd.it:11577/2716099 2024-04-14T08:03:42+00:00 Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys TEZA, GIORDANO Arianna Pesci Giuseppe Casula Teza, Giordano Arianna, Pesci Giuseppe, Casula 2012 http://hdl.handle.net/11577/2716099 https://doi.org/10.1111/j.1365-246X.2012.05403.x eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000302623600011 volume:189 firstpage:851 lastpage:862 numberofpages:12 journal:GEOPHYSICAL JOURNAL INTERNATIONAL http://hdl.handle.net/11577/2716099 doi:10.1111/j.1365-246X.2012.05403.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84859710946 info:eu-repo/semantics/article 2012 ftunivpadovairis https://doi.org/10.1111/j.1365-246X.2012.05403.x 2024-03-21T19:14:40Z The monitoring of crustal motions in Northern Victoria Land (NVL) of Antarctica by means of episodic GPS stations (EGPSs) provides an accurate and dense (∼50-km spaced) velocity field. The data, gathered starting in Austral summer 1999, derive from a series of benchmarks belonging to the Victoria Land Network for DEFormation control (VLNDEF) geodetic network. The velocity uncertainties are checked on the basis of length and returning time of the episodic surveys, to obtain a meaningful strain rate field by means of a least-square computation where the contribution of a GPS station is weighted by the inverse square of its velocity error. The study shows that the NVL is characterized by a complex kinematics and that, although three subregions with different prevailing deformational behaviour can be recognized, the single blocks cannot be resolved because too few stations exist. Only features having 150–200 km size at least can be recognized. Moreover, it is demonstrated that an appropriate data processing of EGPS data can lead to an accurate evaluation of the strain rate field even in a harsh environment like Antarctica. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Padua Research Archive (IRIS - Università degli Studi di Padova) Austral Victoria Land Geophysical Journal International 189 2 851 862 |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
description |
The monitoring of crustal motions in Northern Victoria Land (NVL) of Antarctica by means of episodic GPS stations (EGPSs) provides an accurate and dense (∼50-km spaced) velocity field. The data, gathered starting in Austral summer 1999, derive from a series of benchmarks belonging to the Victoria Land Network for DEFormation control (VLNDEF) geodetic network. The velocity uncertainties are checked on the basis of length and returning time of the episodic surveys, to obtain a meaningful strain rate field by means of a least-square computation where the contribution of a GPS station is weighted by the inverse square of its velocity error. The study shows that the NVL is characterized by a complex kinematics and that, although three subregions with different prevailing deformational behaviour can be recognized, the single blocks cannot be resolved because too few stations exist. Only features having 150–200 km size at least can be recognized. Moreover, it is demonstrated that an appropriate data processing of EGPS data can lead to an accurate evaluation of the strain rate field even in a harsh environment like Antarctica. |
author2 |
Teza, Giordano Arianna, Pesci Giuseppe, Casula |
format |
Article in Journal/Newspaper |
author |
TEZA, GIORDANO Arianna Pesci Giuseppe Casula |
spellingShingle |
TEZA, GIORDANO Arianna Pesci Giuseppe Casula Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys |
author_facet |
TEZA, GIORDANO Arianna Pesci Giuseppe Casula |
author_sort |
TEZA, GIORDANO |
title |
Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys |
title_short |
Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys |
title_full |
Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys |
title_fullStr |
Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys |
title_full_unstemmed |
Strain rate computation in Northern Victoria Land (Antarctica) from episodic GPS surveys |
title_sort |
strain rate computation in northern victoria land (antarctica) from episodic gps surveys |
publishDate |
2012 |
url |
http://hdl.handle.net/11577/2716099 https://doi.org/10.1111/j.1365-246X.2012.05403.x |
geographic |
Austral Victoria Land |
geographic_facet |
Austral Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000302623600011 volume:189 firstpage:851 lastpage:862 numberofpages:12 journal:GEOPHYSICAL JOURNAL INTERNATIONAL http://hdl.handle.net/11577/2716099 doi:10.1111/j.1365-246X.2012.05403.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84859710946 |
op_doi |
https://doi.org/10.1111/j.1365-246X.2012.05403.x |
container_title |
Geophysical Journal International |
container_volume |
189 |
container_issue |
2 |
container_start_page |
851 |
op_container_end_page |
862 |
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