Details

Title

Studies of crustal deformation due to hydrological loading on GPS height estimates

Journal title

Geodesy and Cartography

Yearbook

2011

Volume

vol. 60

Numer

No 2

Publication authors

Keywords

GPS ; PPP ; hydrology model ; surface loading

Divisions of PAS

Nauki Techniczne

Abstract

The paper deals with large-scale crustal deformation due to hydrological surface loads and its influence on seasonal variation of GPS estimated heights. The research was concentrated on the area of Poland. The deformation caused by continental water storage has been computed on the basis of WaterGAP Hydrological Model data by applying convolution of water masses with appropriate Green’s function. Obtained site displacements were compared with height changes estimated from GPS observations using the Precise Point Positioning (PPP) method. Long time series of the solutions for 4 stations were used for evaluation of surface loading phenomena. Good agreement both in amplitude and phase was found, however some discrepancies remain which are assigned to single point positioning technique deficiencies. Annual repeatability of water cycle and demanding procedure for computing site displacements for each site, allowed to develop a simple model for Poland which could be applied to remove (or highly reduce) seasonal hydrological signal from time series of GPS solutions.

Publisher

Commitee on Geodesy PAS

Date

2011

Type

Artykuły / Articles

Identifier

ISSN 2080-7636

References

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DOI

10.2478/v10277-012-0012-y

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