LFRic2LFRic Plan

[cjohnson-pi]

Are there any linked Issues or Pull Requests?

No response

Brief description

Summary and plan for the work required for LFRic2LFRic. This is a best estimate of the work required. It should not be taken as a definitive guide, is subject to being updated and is to be only used as a general direction for planning work.

Further details of the issue.

The main UM reconfiguration is rcf_create_dump

• Coastal Adjustment.
  rcf_apply_coastal_adustment and described in UMDP_S11 Appendix B. To be handled with ESMF and OASIS in lfric2lfric.

• Set interpolation method for particular fields.
  UM code: rcf_horizontal
  UM2LFRic namelist: rose-app-nwp_gal9.conf see specify nearest_neighbour

• Pre- and post interpolation

UM code	Number Lines	Required	PR
rcf_pre_interp_transform	256	Y
rcf_post_interp_transform	380	Y

• Science Adjustment (field dependent calculations source=9 refers to )

UM code	Number Lines	Required	PR
rcf_field_dependent_calcs	333	Y
This contains:
Rcf_derv_thetavd	146	N
Rcf_derv_exner_surf	216	Y
Rcf_filter_exner)	345	N
Rcf_derv_etadot	848	N
Rcf_derv_dry_rho	153	Y
Rcf_recompute_wet_rho	256	Y
Snow depth Rcf_calc_tiles	455	Y	#685
Bulk density Rcf_calc_tiles	455	Y	#685
Rcf_ml_snowpack)	949	Y

• Science Adjustment (field calculations source=8 refers to )

UM code	Number Lines	Required	PR
rcf_field_calcs	515	Y
Likely relevant calls are			#685
Stashcode_sea_ice_temp Rcf_derv_sea_ice_temp
Stashcode_soil_temp rcf_init_soil_temp
Stashcode_frac_surf_type rcf_init_tile_frac			#685
Stashcode_tstar_tile rcf_calc_tiles			#685
Stashcode_z0m_sice_fmd rcf_derv_z0_sice
Stashcode_mv rcf_mixing_ratios, field_set_to_min

• Science Adjustment (Post-processing)

UM code	Number Lines	Required	PR
Rcf_post_process	530	Y
This contains:
rcf_soilstress_to_soilmoist)	211	Y
rcf_soilconc_to_soilmoist	143	Y
rcf_conv_p_exner	196	Y
rcf_calc_output_exner	304	Y
Rcf_conv_exner_p	196	Y
Rcf_conv_t_theta	319	Y
Rcf_calc_rho		Y
Rcf_soil_moist_chk	224	Y
Rcf_lsh_land_ice_chk	174	Y
Rcf_adjust_tsoil	214	Y
Rcf_freeze_soil	202	Y
Rcf_conv_cld_chk	176	Y
Rcf_cloud_frac_chk	434	Y
Rcf_snow_amount_chk	386	Y
Rcf_sea_ice_frac_chk	192	Y
Rcf_polar_rows_chk	292	N

• Science Adjustment (Pre Post-processing)

UM code	Number Lines	Required	PR
rcf_pre_process_calcs	155	Y
This calls
rcf_derv_cloudfrac	223	Y

• LBC files. The reconfiguration needs to be applied to files with LBC fields. The main difference from an initial condition file is that there are multiple times.

• LBC meshes. Ideally the LBC data should be written to an LBC mesh. However, LFRic is not able to read the data from an LBC mesh at the moment. Therefore this is not a priority.

• W2 winds. The winds need to be mapped to W3, interpolated and then mapped back to W2. However it is possible to read W3 winds in and write out W3 winds (using diagnostic files rather than checkpoint files) so this is not a priority at the moment.