Atmospheric Contributions to Global Ocean Tides for Satellite Gravimetry ...

• Main Authors: Balidakis, Kyriakos, Sulzbach, Roman, Shihora, Linus, Dahle, Christoph, Dill, Robert, Dobslaw, Henryk
• Format: Text
• Language: unknown
• Published: Freie Universität Berlin 2022
• Subjects: atmospheric tides; ocean tides; de‐aliasing; GRACE‐FO; ERA5; atmospheric forcing; 500 Naturwissenschaften und Mathematik550 Geowissenschaften, Geologie550 Geowissenschaften; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.17169/refubium-38769; https://refubium.fu-berlin.de/handle/fub188/39053

To mitigate temporal aliasing effects in monthly mean global gravity fields from the GRACE and GRACE‐FO satellite tandem missions, both tidal and non‐tidal background models describing high‐frequency mass variability in atmosphere and oceans are needed. To quantify tides in the atmosphere, we exploit the higher spatial (31 km) and temporal (1 hr) resolution provided by the latest atmospheric ECMWF reanalysis, ERA5. The oceanic response to atmospheric tides is subsequently modeled with the general ocean circulation model MPIOM (in a recently revised TP10L40 configuration that includes the feedback of self‐attraction and loading to the momentum equations and has an improved bathymetry around Antarctica) as well as the shallow water model TiME (employing a much higher spatial resolution and more elaborate tidal dissipation than MPIOM). Both ocean models consider jointly the effects of atmospheric pressure variations and surface wind stress. We present the characteristics of 16 waves beating at frequencies in ...