!!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> !! LIM3 namelist : !! 1 - Generic parameters (namicerun) !! 2 - Ice initialization (namiceini) !! 3 - Ice discretization (namiceitd) !! 4 - Ice dynamics and transport (namicedyn) !! 5 - Ice thermodynamics (namicethd) !! 6 - Ice salinity (namicesal) !! 7 - Ice mechanical redistribution (namiceitdme) !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ! !------------------------------------------------------------------------------ &namicerun ! Generic parameters !------------------------------------------------------------------------------ jpl = 5 ! number of ice categories nlay_i = 2 ! number of ice layers nlay_s = 1 ! number of snow layers (only 1 is working) cn_icerst_in = "restart_ice" ! suffix of ice restart name (input) cn_icerst_indir = "." ! directory from which to read input ice restarts cn_icerst_out = "restart_ice" ! suffix of ice restart name (output) cn_icerst_outdir = "." ! directory in which to write output ice restarts ln_limdyn = .true. ! ice dynamics (T) or thermodynamics only (F) rn_amax_n = 0.999 ! maximum tolerated ice concentration NH rn_amax_s = 0.999 ! maximum tolerated ice concentration SH ln_limdiahsb = .false. ! check the heat and salt budgets (T) or not (F) ln_limdiaout = .true. ! output the heat and salt budgets (T) or not (F) ln_icectl = .false. ! ice points output for debug (T or F) iiceprt = 10 ! i-index for debug jiceprt = 10 ! j-index for debug / !------------------------------------------------------------------------------ &namiceini ! Ice initialization !------------------------------------------------------------------------------ ln_iceini = .true. ! activate ice initialization (T) or not (F) rn_thres_sst = 2.0 ! maximum water temperature with initial ice (degC) rn_hts_ini_n = 0.3 ! initial real snow thickness (m), North rn_hts_ini_s = 0.3 ! " " South rn_hti_ini_n = 3.0 ! initial real ice thickness (m), North rn_hti_ini_s = 1.0 ! " " South rn_ati_ini_n = 0.9 ! initial ice concentration (-), North rn_ati_ini_s = 0.9 ! " " South rn_smi_ini_n = 6.3 ! initial ice salinity (g/kg), North rn_smi_ini_s = 6.3 ! " " South rn_tmi_ini_n = 270. ! initial ice/snw temperature (K), North rn_tmi_ini_s = 270. ! " " South / !------------------------------------------------------------------------------ &namiceitd ! Ice discretization !------------------------------------------------------------------------------ nn_catbnd = 2 ! computation of ice category boundaries based on ! 1: tanh function ! 2: h^(-alpha), function of rn_himean rn_himean = 2.0 ! expected domain-average ice thickness (m), nn_catbnd = 2 only / !------------------------------------------------------------------------------ &namicedyn ! Ice dynamics and transport !------------------------------------------------------------------------------ nn_icestr = 0 ! ice strength parameteriztaion ! 0: Hibler_79 P = pstar**exp(-c_rhg*A) ! 1: Rothrock_75 P = Cf*coeff*integral(wr.h^2) ln_icestr_bvf = .false. ! ice strength function brine volume (T) or not (F) rn_pe_rdg = 17.0 ! ridging work divided by pot. energy change in ridging, if nn_icestr = 1 rn_pstar = 2.0e+04 ! ice strength thickness parameter (N/m2), nn_icestr = 0 rn_crhg = 20.0 ! ice strength conc. parameter (-), nn_icestr = 0 rn_cio = 5.0e-03 ! ice-ocean drag coefficient (-) rn_creepl = 1.0e-12 ! creep limit (s-1) rn_ecc = 2.0 ! eccentricity of the elliptical yield curve nn_nevp = 120 ! number of EVP subcycles rn_relast = 0.333 ! ratio of elastic timescale to ice time step: Telast = dt_ice * rn_relast ! advised value: 1/3 (rn_nevp=120) or 1/9 (rn_nevp=300) nn_ahi0 = 2 ! horizontal diffusivity computation ! 0: use rn_ahi0_ref ! 1: use rn_ahi0_ref x mean grid cell length / ( 2deg mean grid cell length ) ! 2: use rn_ahi0_ref x grid cell length / ( 2deg mean grid cell length ) rn_ahi0_ref = 350.0 ! horizontal sea ice diffusivity (m2/s) ! if nn_ahi0 > 0, rn_ahi0_ref is the reference value at a nominal 2 deg resolution / !------------------------------------------------------------------------------ &namicehdf ! Ice horizontal diffusion !------------------------------------------------------------------------------ nn_convfrq = 5 ! convergence check frequency of the Crant-Nicholson scheme (perf. optimization) / !------------------------------------------------------------------------------ &namicethd ! Ice thermodynamics !------------------------------------------------------------------------------ rn_hnewice = 0.1 ! thickness for new ice formation in open water (m) ln_frazil = .false. ! use frazil ice collection thickness as a function of wind (T) or not (F) rn_maxfrazb = 1.0 ! maximum fraction of frazil ice collecting at the ice base rn_vfrazb = 0.417 ! thresold drift speed for frazil ice collecting at the ice bottom (m/s) rn_Cfrazb = 5.0 ! squeezing coefficient for frazil ice collecting at the ice bottom rn_himin = 0.10 ! minimum ice thickness (m) used in remapping, must be smaller than rn_hnewice rn_betas = 0.66 ! exponent in lead-ice repratition of snow precipitation ! betas = 1 -> equipartition, betas < 1 -> more on leads rn_kappa_i = 1.0 ! radiation attenuation coefficient in sea ice (m-1) nn_conv_dif = 50 ! maximal number of iterations for heat diffusion computation rn_terr_dif = 0.0001 ! maximum temperature after heat diffusion (degC) nn_ice_thcon= 1 ! sea ice thermal conductivity ! 0: k = k0 + beta.S/T (Untersteiner, 1964) ! 1: k = k0 + beta1.S/T - beta2.T (Pringle et al., 2007) nn_monocat = 0 ! virtual ITD mono-category parameterizations (1, jpl = 1 only) or not (0) ! 2: simple piling instead of ridging --- temporary option ! 3: activate G(he) only --- temporary option ! 4: activate lateral melting only --- temporary option ln_it_qnsice = .true. ! iterate the surface non-solar flux with surface temperature (T) or not (F) / !------------------------------------------------------------------------------ &namicesal ! Ice salinity !------------------------------------------------------------------------------ nn_icesal = 2 ! ice salinity option ! 1: constant ice salinity (S=rn_icesal) ! 2: varying salinity parameterization S(z,t) ! 3: prescribed salinity profile S(z), Schwarzacher, 1959 rn_icesal = 4. ! ice salinity (g/kg, nn_icesal = 1 only) rn_sal_gd = 5. ! restoring ice salinity, gravity drainage (g/kg) rn_time_gd = 1.73e+6 ! restoring time scale, gravity drainage (s) rn_sal_fl = 2. ! restoring ice salinity, flushing (g/kg) rn_time_fl = 8.64e+5 ! restoring time scale, flushing (s) rn_simax = 20. ! maximum tolerated ice salinity (g/kg) rn_simin = 0.1 ! minimum tolerated ice salinity (g/kg) / !------------------------------------------------------------------------------ &namiceitdme ! Ice mechanical redistribution (ridging and rafting) !------------------------------------------------------------------------------ rn_Cs = 0.5 ! fraction of shearing energy contributing to ridging rn_fsnowrdg = 0.5 ! snow volume fraction that survives in ridging rn_fsnowrft = 0.5 ! snow volume fraction that survives in rafting nn_partfun = 1 ! type of ridging participation function ! 0: linear (Thorndike et al, 1975) ! 1: exponential (Lipscomb, 2007 rn_gstar = 0.15 ! fractional area of thin ice being ridged (nn_partfun = 0) rn_astar = 0.05 ! exponential measure of ridging ice fraction (nn_partfun = 1) rn_hstar = 100.0 ! determines the maximum thickness of ridged ice (m) (Hibler, 1980) ln_rafting = .true. ! rafting activated (T) or not (F) rn_hraft = 0.75 ! threshold thickness for rafting (m) rn_craft = 5.0 ! squeezing coefficient used in the rafting function rn_por_rdg = 0.3 ! porosity of newly ridged ice (Lepparanta et al., 1995) /