Non-tidal ocean loading signals of the North and Baltic Sea from terrestrial gravimetry, GNSS, and high-resolution modeling

authored by

Christian Voigt, Roman Sulzbach, Henryk Dobslaw, Adelheid Weise, Ludger Timmen, Zhiguo Deng, Marvin Reich, Nico Stolarczuk, Heino Peters, Michael Fietz, Maik Thomas, Frank Michael Flechtner

Abstract

Non-tidal ocean loading (NTOL) signals are known to be a significant source of geophysically induced noise in gravimetric and geodetic observations also far-away from the coast and especially during extreme events such as storm surges. Operationally available corrections suffer from a low temporal and spatial resolution and reveal too small amplitudes on continental stations. Dedicated high-resolution sea-level modeling of the North and Baltic Sea provides an improved prediction of NTOL signals. Superconducting gravimeter and Global Navigation Satellite Systems observations on the small offshore island of Heligoland in the North Sea are used for an evaluation of the model values revealing largely increased correlations of up to 0.9 and signal reductions of up to 50% during a storm surge period of one month in January and February 2022. Evaluations on additional continental superconducting gravimeter stations also show significant improvements through the recommended high-resolution modeling for improved signal separation further away from the coast.

Organisation(s)

QuantumFrontiers
Institute of Geodesy

External Organisation(s)

Helmholtz Centre Potsdam - German Research Centre for Geosciences (GFZ)
Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research

Type

Article

Journal

Geophysical Research Letters

Volume

51

ISSN

0094-8276

Publication date

04.07.2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Geophysics, General Earth and Planetary Sciences

Electronic version(s)

https://doi.org/10.22541/essoar.171136797.71160253/v1 (Access: Open)
https://doi.org/10.1029/2024GL109262 (Access: Open)