Assessment of continental hydrosphere loading using GNSS measurements

Michał Zygmunt , Marcin Rajner , Tomasz Liwosz

Abstract

Presented paper is dedicated to problems of deformation of the Earth's crust as a response to the surface loading caused by continental waters. The aim of this study was to specify areas particularly vulnerable to studied deformation and to compare calculated and observed displacements. Information of the continental water volume was taken from the WaterGAP Global Hydrological Model. Calculated values of the deformations were verified with the results obtained with programs SPOTL and grat. Vertical deformations were almost 10 times higher than the deformation in the horizontal plane, for which reason later part of the paper focuses on the former. In order to check agreement of the calculated and observed deformation 23 stations of International GNSS Service (IGS) were selected and divided into three groups (inland, near the shoreline and islands). Before comparison outliers and discontinuities were removed from GNSS observations. Modelled and observed signals were centred. The analysed time series of the vertical displacements showed that only for the inland stations it is possible to effectively remove displacements caused by mass transfer in the hydrosphere. For stations located in the coastal regions or islands, it is necessary to consider additional movement effects resulting from indirect ocean tidal loading or atmosphere loading.
Author Michał Zygmunt KGAG
Michał Zygmunt,,
- Chair of Geodesy and Geodetic Astronomy
, Marcin Rajner KGAG
Marcin Rajner,,
- Chair of Geodesy and Geodetic Astronomy
, Tomasz Liwosz KGAG
Tomasz Liwosz,,
- Chair of Geodesy and Geodetic Astronomy
Journal seriesReports on Geodesy and Geoinformatics, ISSN 2391-8365, e-ISSN 2391-8152
Issue year2016
No101/2016
Pages36-53
Publication size in sheets0.85
Keywords in EnglishLoad Love Numbers, Green’s functions, WGHM, GNSS, Crustal deformation
DOIDOI:10.1515/rgg-2016-0020
Internal identifier86/2016
Languageen angielski
File
2016_Rajner_Liwosz_Assessment_of_continental_86.pdf / 2.34 MB / 2016_Rajner_Liwosz_Assessment_of_continental_86.pdf 2.34 MB
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2016_Oświadczenie_Zygmunt_Rajner_Liwosz_Assessment_of_continent.pdf (file archived - login or check accessibility on faculty) 2016_Oświadczenie_Zygmunt_Rajner_Liwosz_Assessment_of_continent.pdf 449.21 KB
Score (nominal)13
ScoreMinisterial score = 13.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 13.0, 28-11-2017, ArticleFromJournal
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