Tides WG

Last edition: Wikinfo(changed_ts)? by Wikinfo(changed_by)?

!!!! NEXT WG MEETING: Tuesday Feb 16th 2021, 16PM CET !!!!

​https://teams.microsoft.com/l/meetup-join/19%3ameeting_ZTNmNmRjMTctNTg5Ni00ODI4LWIzYTktNTBiMmNiYmNkODQ3%40thread.v2/0?context=%7b%22Tid%22%3a%22740c5fd3-6e8b-4176-9cc9-454dbe4e62c4%22%2c%22Oid%22%3a%22c7a3bcfc-004c-4992-9565-406f7d7bc80f%22%7d

Working group leader (and responsible for wiki pages): Frédéric Dupont

Members of the working group:

• Susan Allen (UBC, Canada)
• Mike Bell (UKmet)
• Natacha Bernier (Environnement Canada)
• David M. Byrne (NOC)
• Loren Carrere (CLS)
• Jérôme Chanut (Mercator Océan)
• Andrew C. Coward (NOC)
• Frédéric Dupont (Environnement Canada)
• Ariane Koch-Larrouy (LEGOS)
• Julien Le Sommer (Grenoble)
• Youyu Lu (DFO, Canada)
• Florent Lyard (LEGOS)
• Yves Morel (LEGOS)
• Jean-Philippe Paquin (Environnement Canada)
• Jeffrey Polton (NOC)
• Chris Wilson (NOC)
• Simon Mueller (NOC)
• Enda Odea (UKmet)
• Pengcheng Wang (Environnement Canada)

Objectives:

Sustain and improve Tides implementation in NEMO. Provide support to users.

WG internal meetings:

TOC(noheading,WorkingGroups/Tides/*, depth=2)?

• 2020-11-19: introductory meeting and quick round table. Examples of issues that were discussed: data assimilation (or correction methods), wet-and-drying, diagnostic tools, new tidal astronomical potential, numerical issues, OBC. A conclusion was to organize next a special meeting about data assimilation (or correction methods) and afterwards another about common tools and numerics. introductory material​
• 2021-01-12: presentation of two methods for assmilating/correcting the tides.
  • Tidal Nudging in the momentum equations and S2 issues in tidal-only runs​ presented by Pengcheng Wang, who confirmed afterwards that he is nudging to the tidal atlas transport (U*H).
  • Correction method for implementing tides in (coarse) OGCMs​ presented by Yves Morel, also referred as the "injection" approach.
• 2021-02-16:
  • Presentation of the incoming improvement to tides in NEMO by Simon Mueller slides​, discussion if some tidal parameters should be variable across all constituents.
  • Energy diagnostics
  • Discussion on boundary conditions, limitation of Flather OBC close to the resonant latitude, need for a 'clamped' SSH boundary.
  • Discussion on normal modes and the difficulty of adding an eigenvalue library into NEMO.
  • Discussion on internal wave drag parameterization.
  • Discussion around a newly proposed astronomical potential based solely on astronomical arguments. pros: it does not require the development for different constituents; cons: difficulty of separating constituents.