Abstract
Loading of the Earth’s crust due to variations of global atmosphere pressure can displace the positions of geodetic sites by more than 1 cm both vertically and horizontally on annual to sub-diurnal time scales, and thus has to be taken into account in the analysis of space geodetic observations. This part of the book discusses methods for the calculation of the displacements. In particular, it summarizes the simple approach with regression coefficients between surface pressure and the vertical displacement and the more rigorous geophysical approach with load Love numbers and Green’s functions. Furthermore, we describe the special treatment of the thermal tides (S1 and S2), the importance of the reference pressure, as well as the inverted barometer hypothesis for the oceans. Finally, we present space geodetic results with the application of those correction models for the analysis of Very Long Baseline Interferometry observations.
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Acknowledgments
We would like to thank the reviewer, Jean-Paul Boy, for checking this part of the book and providing very valuable suggestions. We are grateful for the financial support from the Austrian Science Fund (FWF, P20902-N10).
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Wijaya, D.D., Böhm, J., Karbon, M., Kràsnà, H., Schuh, H. (2013). Atmospheric Pressure Loading. In: Böhm, J., Schuh, H. (eds) Atmospheric Effects in Space Geodesy. Springer Atmospheric Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36932-2_4
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DOI: https://doi.org/10.1007/978-3-642-36932-2_4
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