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PHYPRO-01_agn_OSMOSIS_science
Last edition: Wikinfo(changed_ts)? by Wikinfo(changed_by)?
The PI is responsible to closely follow the progress of the action, and especially to contact NEMO project manager if the delay on preview (or review) are longer than the 2 weeks expected.
Summary
| Action | PHYPRO-01_agn_OSMOSIS_science |
|---|---|
| PI(S) | George Nurser |
| Digest | Improvements to OSMOSIS OBL to improve behaviour in shelf-sea areas and under sea ice |
| Dependencies | If any |
| Branch | source:/NEMO/branches/{YEAR}/dev_r{REV}_{ACTION_NAME} |
| Previewer(s) | Names |
| Reviewer(s) | Names |
| Ticket | #2352 |
Description
Improve OSMOSIS ocean boundary layer (OBL) model in 3 areas:
- Ensure consistent behaviour of OSMOSIS-OBL under ice. Revert to classic shear turbulence based on ice-ocean turbulent friction velocity where ice areal coverage is high; scale with ice fraction between shear turbulence and Langmuir turbulence model. Where Stokes drift unavailable, move to parametrised form.
- Improve representation of OSMOSIS-OBL mixing in equatorial regions. Include mixing associated with shear of mean flow as in equatorial undercurrent.
- Mixing in shelf seas. The OSMOSIS-OBL is primarily a surface boundary layer model and so is not set up for bottom-driven tidal mixing. We intend to transition to GLS in shelf seas.
Implementation
Changes will be mostly restricted to the routine zdfosm.F90. There will be a new subroutine added to handle the shear-induced mixing.
Documentation updates
An extra paragraph or two will be added to the documentation in section 9.1.5 of the manual.
Preview
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Tests
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Review
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