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wdc-climate.de:3952976 eng; USA collection Tides_ICON-O Dr. Eileen Hertwig Deutsches Klimarechenzentrum http://www.dkrz.de/ pointOfContact 2022-09-13T13:10:57 ISO 19115 ISO 19115-2:2009 Tides simulated by the global ocean model ICON-O in various set-ups 2022-10-14 publication 1 Tides_ICON-O doi:10.26050/WDCC/Tides_ICON-O Dr. Eileen Hertwig Deutsches Klimarechenzentrum http://www.dkrz.de/ Email: hertwig@dkrz.de principalInvestigator Dr. Eileen Hertwig Deutsches Klimarechenzentrum http://www.dkrz.de/ Email: hertwig@dkrz.de author Dr. Jin-Song von Storch Max Planck Institute for Meteorology http://www.mpimet.mpg.de/ Email: jin-song.von.storch@mpimet.mpg.de author Dr. Helmuth Haak Max Planck Institute for Meteorology http://www.mpimet.mpg.de/ Email: helmuth.haak@mpimet.mpg.de author Dr. Veit Lüschow Max Planck Institute for Meteorology http://www.mpimet.mpg.de/ Email: veit.lueschow@mpimet.mpg.de author WDC Climate at DKRZ publisher For the development of the earth-system model ICON, carried out at the Max-Planck Institute for Meteorology in cooperation with the German meteorological service (DWD), the ocean compartment plays a major role. It is now used to push the frontiers of simulating the climate based on first principles by resolving its major energetic motions, including those at small scales such as eddies and waves in the ocean. This new development, however, still requires substantial efforts. One such a process is internal tides that are generated as (barotropic) tides flow over topographic features such as underwater ridges and sea mounts. To ensure a realistic representation of internal tides, one needs to make sure that the model used is capable to realistically simulate the tides. A set of experiments has been carried to assess the ability of ICON-O to simulate open ocean tides. Tides are tested in the global ocean model ICON-O in various horizontal resolutions: R2B6 (40km), R2B8 (10km), and BCT (BaseCampTelescope: a telescoping -inhomogeneous- grid ranging from 80km to 8km with a focus region in the South Atlantic). All runs are performed with a relatively high vertical resolution (128 vertical levels) and additionally the vertical coordinate z* is used and different heights of top levels are applied. To improve the simulated tides two new parameterizations are introduced in ICON-O. Self-Attraction and Loading (SAL) and a parameterization for Tidal-Bottom-Drag (TBD) are introduced individually and together in all 3 horizontal resolutions. 100 years of spin-up simulations with OMIP forcing and without tides have been performed for all set-ups. After the climate has spun-up reasonably, 3 more years of simulation now with tides have been performed. For the tides to spin-up, only the last year is evaluated. The raw model output (hourly sea surface elevation) and the spin-up runs are also available (see references). One year (the last) of the ICON-O simulation with tides is analyzed by the least-square-fitting method of Foreman et al. (2009). From this harmonic analysis the harmonic constants of the eight major diurnal and semi-diurnal tidal constituents (M2, S2, N2, K2, K1, O1, P1, and Q1) are derived. Phases and amplitudes on the original ICON-O grid (XX_harmonics.nc) and a regridded regular 0.1-degree grid (XX_harmonics_r3600x1800.nc) are archived. Dr. Eileen Hertwig Deutsches Klimarechenzentrum http://www.dkrz.de/ pointOfContact NetCDF ICON harmonic analysis ocean simulation ocean tides CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA -180.0 180.0 -90.0 90.0 tidal_amplitude_S2 tidal_amplitude_S2; unit: m tidal_phase_K1 tidal_phase_K1; unit: degree tidal_amplitude_P1 tidal_amplitude_P1; unit: m tidal_phase_Q1 tidal_phase_Q1; unit: degree tidal_amplitude_M2 tidal_amplitude_M2; unit: m tidal_phase_K2 tidal_phase_K2; unit: degree tidal_amplitude_K1 tidal_amplitude_K1; unit: m tidal_amplitude_O1 tidal_amplitude_O1; unit: m tidal_phase_P1 tidal_phase_P1; unit: degree tidal_phase_M2 tidal_phase_M2; unit: degree tidal_amplitude_Q1 tidal_amplitude_Q1; unit: m tidal_phase_S2 tidal_phase_S2; unit: degree tidal_amplitude_N2 tidal_amplitude_N2; unit: m tidal_amplitude_K2 tidal_amplitude_K2; unit: m tidal_phase_O1 tidal_phase_O1; unit: degree tidal_phase_N2 tidal_phase_N2; unit: degree NetCDF 7750 https://www.wdc-climate.de/ui/entry?acronym=Tides_ICON-O information collection