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ORCA2_LIM reference runs
A - Purposes:
Document the changes from ORCA2-LIM based on OPA8.2 and ORCA2-LIM base on last NEMO version
Key changes to be documented:
# Existing one :
- partial step representation of bottom topography
- updated TKE physics (surface/internal wave breaking)
- new sea-ice component (LIM-3)
- test (again) free-slip option
# Existing but not included in NEMO trunk :
- Kz tides including ITF specific formulation (Laurent & Ariane PhD)
- mesoscale eddy parametrisation : added in momentum equations (Aiki) (Claude/Gurvan? Japan)
- 3 band light penetration (RGB) (Sebastian Japan)
- Ocean color used to specified time-space varying light penetration (Sebastian Japan)
- Diurnal cycle on qsr (from daily mean value) (Sebastian Japan)
- New TKE physics #2 (MERCATOR)
- New advection scheme on the vertical COMPACT (Laurent)
- Time splitting over the vertical for the advection (Gurvan)
- Freshwater input under Ice Shelves (JMM DRAKKAR)
# Forth coming one :
- Fox-Kemper vertical velocities around the MLD parameterization (Gurvan & Xavier)
- Advective BBL
- bound Aeiv as a function of mean velocity
- add Aeiv = advection-diffusion equation Eden et Greatbatch 2008-2009
- add 3D source for ice-shelf melting, runoff and cross-land adv
- Code and test Gent coef. vertical dependence to N2
- Background Kz as a function of latitutde
- mesoscale eddy parametrisation : Griffies scheme + Visbeck coefficient (MetOffice?, NOCS)
- sensitivity of the ediss parameter (MERCATOR)
- npc reactivation (Claude/Gurvan?)
- conservative leap-frog (Matthieu)
- vvl + conservative leap-frog (Matthieu)
B - Ongoing simulations:
C - To do list/ Remaining Questions:
- check climatological CORE bulk forcing fields computed during 1st and 2nd year
- do moficiation to perfom annual mean outputs except the last year: OK
- check with Martin that all ice parameters for LIM 3.0 are the best one for ORCA2_LIM.
- ensure the upload of the STRAIT.dat file (transport through straits) : OK
- rebuild the meshmask since the scale factors have been changed on some straits: OK
Questions to solve when setting the control simulation:
- Damping term in the Red sea is not clear, strong differences with Levitus in this area, since it is reduced in dtatem.F90 2 check
- What are we doing with runoffs ? A: We used the standard climatology
- freswater budget, annual correction ? A: yes, in using the previous year ssh drift.
- Do we take into account the ice melting of Greenland and Antarctic into runoffs directly ?
- advection scheme to use ? A: the TVD for tracers
- define the way to manage the wind speed .vs. the sea-ice/ocean velocity, i.e do the difference of fields
- define the relaxation time scale for the SSS restoring term and define the area i.e. (global even under sea-ice ?) Done everywhere even under sea-ice, same restorint time scale (12 days) as for SST which require a value of deds= - 864 mm/day
- use the corrected interpolated temp/ salinity fields in Arctic from PHC for initialization suggested by Sylvain Bouillon see ticket: #227; Conkright et al. (2002) everywhere except in Arctic and Steel et al. (2001) for Arctic region data for the initialization ? (See Core paper)
- bathymetry review ( special treatment of straits Gibraltar, Bab El ..ec ) A: yes around Gibraltar and Bab El Mandeb straits with new depth, and a reduing of scale factors.
D - Few characteristics of runs as a reminder:
- perform internal damping (key_tradmp) ndmp = -1 around Gibraltat & Bab El Mandeb straits
- SSS damping ln_sssr = true with a restoring time scale of 12 days (same as for SST) deds = -864 mm/day
Last modified 14 years ago
Last modified on 2009-12-08T14:44:35+01:00