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)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{980bc68b915746f0af285022392db297,
title = "Analysis of non-tidal ocean loading for gravitational potential observations in northern Europe",
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.",
keywords = "Gravitational potential, Non-tidal ocean loading, North Sea, Relativistic geodesy",
author = "L. Le{\ss}mann and J. M{\"u}ller",
note = "Funding information: The authors would like to thank the DFG Collaborative Research Center CRC-1128 Relativistic Geodesy and Gravimetry with Quantum Sensors (geo-Q) for financial support. We want to thank the reviewer for the valuable comments.",
year = "2018",
month = may,
day = "29",
doi = "10.1016/j.jog.2018.05.008",
language = "English",
volume = "119",
pages = "23--28",
journal = "Journal of geodynamics",
issn = "0264-3707",
publisher = "Elsevier Ltd.",
}