Effect of antenna snow intrusion on vertical GPS position time series in Antarctica
© 2020, The Author(s). Vertical surface displacements from continuous Global Positioning System (GPS) stations often show strong seasonal signals, which in some cases may be associated with surface mass loading, including hydrological, and non-tidal oceanic and atmospheric loading. In Antarctica, ma...
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2020
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ftunivnewcastle:oai:eprint.ncl.ac.uk:271290 2023-05-15T13:54:24+02:00 Effect of antenna snow intrusion on vertical GPS position time series in Antarctica Koulali A Clarke PJ 1 October 2020 application/pdf https://eprint.ncl.ac.uk/fulltext.aspx?url=271290/129616FA-0259-477F-B852-F8151CD03941.pdf&pub_id=271290 unknown Springer Science and Business Media Deutschland GmbH Journal of Geodesy, 1 October 2020 Article 2020 ftunivnewcastle 2020-11-26T23:25:39Z © 2020, The Author(s). Vertical surface displacements from continuous Global Positioning System (GPS) stations often show strong seasonal signals, which in some cases may be associated with surface mass loading, including hydrological, and non-tidal oceanic and atmospheric loading. In Antarctica, many GPS stations show vertical motions in phase with seasonal snow accumulation changes, but these variations cannot be fully explained with snow load variations between seasons. Instead we show, for many sites in Antarctica, that a significant component of the annual cycle in vertical GPS coordinates time series may be related to snow/ice inside antennas causing as an artefact apparent seasonal variation, with amplitudes of up to 4 mm. We present a method based on the Empirical Mode Decomposition (EMD) algorithm to remove this artefact signal. The corrected GPS time series show an improvement in the agreement with displacements predicted by elastic modelling using GRACE-derived surface mass loads. Article in Journal/Newspaper Antarc* Antarctica Newcastle University Library ePrints Service |
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Open Polar |
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Newcastle University Library ePrints Service |
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ftunivnewcastle |
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unknown |
description |
© 2020, The Author(s). Vertical surface displacements from continuous Global Positioning System (GPS) stations often show strong seasonal signals, which in some cases may be associated with surface mass loading, including hydrological, and non-tidal oceanic and atmospheric loading. In Antarctica, many GPS stations show vertical motions in phase with seasonal snow accumulation changes, but these variations cannot be fully explained with snow load variations between seasons. Instead we show, for many sites in Antarctica, that a significant component of the annual cycle in vertical GPS coordinates time series may be related to snow/ice inside antennas causing as an artefact apparent seasonal variation, with amplitudes of up to 4 mm. We present a method based on the Empirical Mode Decomposition (EMD) algorithm to remove this artefact signal. The corrected GPS time series show an improvement in the agreement with displacements predicted by elastic modelling using GRACE-derived surface mass loads. |
format |
Article in Journal/Newspaper |
author |
Koulali A Clarke PJ |
spellingShingle |
Koulali A Clarke PJ Effect of antenna snow intrusion on vertical GPS position time series in Antarctica |
author_facet |
Koulali A Clarke PJ |
author_sort |
Koulali A |
title |
Effect of antenna snow intrusion on vertical GPS position time series in Antarctica |
title_short |
Effect of antenna snow intrusion on vertical GPS position time series in Antarctica |
title_full |
Effect of antenna snow intrusion on vertical GPS position time series in Antarctica |
title_fullStr |
Effect of antenna snow intrusion on vertical GPS position time series in Antarctica |
title_full_unstemmed |
Effect of antenna snow intrusion on vertical GPS position time series in Antarctica |
title_sort |
effect of antenna snow intrusion on vertical gps position time series in antarctica |
publisher |
Springer Science and Business Media Deutschland GmbH |
publishDate |
2020 |
url |
https://eprint.ncl.ac.uk/fulltext.aspx?url=271290/129616FA-0259-477F-B852-F8151CD03941.pdf&pub_id=271290 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of Geodesy, 1 October 2020 |
_version_ |
1766260146671976448 |