This reprository hold #1 the NEMO code source as associated input files as well (hereafter namelists) and #2 the list of other input files to describe the grid, the bathymetry and the surface forcing used to perform the numerical experiment called CREG025.L75-ERA01.
The CREG025.L75-ERA01 experiment relies on the ocean/sea ice models from the NEMO numerical plateform NEMO; it uses both NEMO-OPA and NEMO-LIM3.5 models for the ocean and the sea ice components respectively. It aims at simulating the ocean/sea-ice dynamics over the north Atlantic ocean (starting from ~25°N), the Greenland-Iceland-Norway seas and the whole Arctic basin with a limit along the Bering strait.
- The horizontal grid is a 1/4 degree i.e. from ~25km up to ~12km in most of the Arctic basin.
- A 75 vertical levels from 1m close to the surface up to 200m below 4000m.
- The model time step is ∆t=720s.
- The period simulated covers the range 1979-2018 (40-year long).
- The ocean/sea ice model:
** The initial code source relies on the official NEMO release 3.6. Information can be found there https://forge.ipsl.jussieu.fr/nemo/wiki/Users#. The whole official code NEMO is available as the specific code changes as well associated to this experiement in the MY_SRC. The ARCH give a list all computers architecture on which NEMO has been compiled as templates. - The XIOS libray to perform outputs:
** Outputs have been realised in using the XIOS library; the revision 952 has been downloaded and compiled. More information can be found there XIOS.
1 - Time invariant input files:
- Bathymetry:
** Description: ocean depth in meters (zeo aver land grid points). This file has been extracted from an existing global ORCA025.L75 configuration file.
** File name:CREG025_bathy_etopo1_gebco1_smoothed_coast_corrected_bering_may11_time_ct20181224.nc - Coordinates:
** Description: horizontal grid scale factors as the geographical location of each Arakaw-C grid type point. This file has been extracted from an existing global ORCA025.L75 configuration file.
** File name:coordinates_CREG_R025_lombok+ombai_v2_vh20161220.nc - Ocean initialisation:
** Description: World Ocean Atlas 2009 at 1°x1° climatology
** File name:woa09_temperature01_monthly_1deg_t_an_CMA_drowned_Ex_L75.nc, woa09_salinity01_monthly_1deg_s_an_CMA_drowned_Ex_L75.nc - Ice initialisation:
** Description: January climatology computed over the period 1998-2007 from a global ocean numerical experiement called ORCA12.L46-MAL95.
** File name:CREG025_SOSIE-CREG12_drowned_ORCA12.L46-MAL95_y1998-2007m01_icemod.nc - Tidal mixing parametrization:
** Description: A new comprehensive parameterization of mixing by breaking internal tides and lee waves (de Lavergne et al., 2019)
** File name:```mixing_power_bot.nc, mixing_power_pyc.nc, mixing_power_cri.nc, decay_scale_bot.nc, decay_scale_cri.nc`` - Distance to the coast:
** Description: gives the distance to the coast of each ocean grid points. It is used to switch off the SSS restoring in a 400km wide range from the coast.
** File name:dist_coast_CREG025_vh20161121.nc
2 - Time varying input files:
- Surface forcing:
** Description: The atmospheric forcing data set ERA5, withCORE bulk formulae(from NCAR) and relative winds (ocean surface velocity components taken into account for the wind stress
** File name:<var>_ERA5-1440x721-CREG025.ncstands for either u10,v10,msdwswrf,msdwlwrf,mtpr,msr,t2,q2.
** Frequency: hourly for all fields - Rivers and Greenland melting fluxes:
** Description: A blend of data from Dai & Trenberth for rivers volume fluxes and Bamber for fresh water resulting from Greenland melting
** File name: ```CREG025_runoff_monthly_combined_Dai_Trenberth_Bamber.nc``
** Frequency: monthl - Open boundaries:
** Description: 2 open boundaries conditions limit the regional domain, data are used there to force the model and are extracted from a previous global numercial simulation called ORCA025.L75-GJM189
** File name:ORCA025.L75-GJM189-CREG025.L75-BDY_south__<var>.ncandORCA025.L75-GJM189-CREG025.L75-BDY_north_<var>.nc. stands vor SSH, U, V, T, S and ice for the Bering open boundar
** Frequency: monthly - Chlorophyll climatology:
** Description: Seawiffs satellite data climatology over the period 1999-2005
** File name: ```chlaseawifs_c1m-99-05_smooth_CREG_R025_vh20161117``
** Frequency: monthly - World Ocean Atlas 2009 surface salinity:
** Description: Sea surface salinity restoring with a piston velocity of 167 mm/day ( 60 days/10 meters
** File name:woa09_sst01-12_monthly_1deg_t_an_CMA_drowned_Ex_L75.nc
** Frequency: monthly - World Ocean Atlas 2009 surface temperature:
** Description: to avoid SSS restoring where the SST climatology temperature is at the freezing point, i.e. in presence of sea-ice
** File name:woa09_sss01-12_monthly_1deg_s_an_CMA_drowned_Ex_L75.nc
** Frequency: monthly
