Analysis of non-tidal ocean loading for gravitational potential observations in northern Europe

authored by
L. Leßmann, J. Müller
Abstract

With the progress in clock technology heading towards a relative clock accuracy of 10−18, geodetic applications become feasible, such as determining gravity potential differences over large distances at the level of 0.1 m2 s−2. In this context, the effect of temporal gravity field variations on the new observable has to be considered. This paper studies non-tidal ocean loading effects on the gravitational potential around the North Sea with respect to signal strength and temporal behavior. Ten years of gravitational potential variations caused by non-tidal ocean loading are calculated for five locations in Germany and France using the Green's function approach. The potential variations are discussed with respect to a static gravity field, the effect of different measurement durations and the differences between two locations. The gravitational potential variations reach values of 0.2–0.5 m2 s−2 in coastal areas and decrease with increasing distance from the coast. Analyzing the potential variations for increasing measurement durations from 1 h to 48 h shows a decrease in magnitude. All investigated locations are strongly correlated. They differ mostly due to different magnitudes of the gravitational potential variations.

Organisation(s)
Institute of Geodesy
Type
Article
Journal
Journal of geodynamics
Volume
119
Pages
23-28
No. of pages
6
ISSN
0264-3707
Publication date
29.05.2018
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Geophysics, Earth-Surface Processes
Electronic version(s)
https://doi.org/10.1016/j.jog.2018.05.008 (Access: Closed)
 

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