| 1 | !!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
|---|
| 2 | !! ESIM namelist: |
|---|
| 3 | !! 1 - Generic parameters (nampar) |
|---|
| 4 | !! 2 - Ice thickness discretization (namitd) |
|---|
| 5 | !! 3 - Ice dynamics (namdyn) |
|---|
| 6 | !! 4 - Ice ridging/rafting (namdyn_rdgrft) |
|---|
| 7 | !! 5 - Ice rheology (namdyn_rhg) |
|---|
| 8 | !! 6 - Ice advection (namdyn_adv) |
|---|
| 9 | !! 7 - Ice surface forcing (namforcing) |
|---|
| 10 | !! 8 - Ice thermodynamics (namthd) |
|---|
| 11 | !! 9 - Ice heat diffusion (namthd_zdf) |
|---|
| 12 | !! 10 - Ice lateral melting (namthd_da) |
|---|
| 13 | !! 11 - Ice growth in open water (namthd_do) |
|---|
| 14 | !! 12 - Ice salinity (namthd_sal) |
|---|
| 15 | !! 13 - Ice melt ponds (namthd_pnd) |
|---|
| 16 | !! 14 - Ice initialization (namini) |
|---|
| 17 | !! 15 - Ice/snow albedos (namalb) |
|---|
| 18 | !! 16 - Ice diagnostics (namdia) |
|---|
| 19 | !!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
|---|
| 20 | ! |
|---|
| 21 | !------------------------------------------------------------------------------ |
|---|
| 22 | &nampar ! Generic parameters |
|---|
| 23 | !------------------------------------------------------------------------------ |
|---|
| 24 | jpl = 5 ! number of ice categories |
|---|
| 25 | nlay_i = 2 ! number of ice layers |
|---|
| 26 | nlay_s = 1 ! number of snow layers (only 1 is working) |
|---|
| 27 | nn_monocat = 0 ! virtual ITD mono-category parameterizations (1-4 => jpl = 1 only) or not (0) |
|---|
| 28 | ! 2: simple piling instead of ridging --- temporary option |
|---|
| 29 | ! 3: activate G(he) only --- temporary option |
|---|
| 30 | ! 4: activate extra lateral melting only --- temporary option |
|---|
| 31 | ln_icedyn = .true. ! ice dynamics (T) or not (F) |
|---|
| 32 | ln_icethd = .true. ! ice thermo (T) or not (F) |
|---|
| 33 | rn_amax_n = 0.997 ! maximum tolerated ice concentration NH |
|---|
| 34 | rn_amax_s = 0.997 ! maximum tolerated ice concentration SH |
|---|
| 35 | cn_icerst_in = "restart_ice" ! suffix of ice restart name (input) |
|---|
| 36 | cn_icerst_out = "restart_ice" ! suffix of ice restart name (output) |
|---|
| 37 | cn_icerst_indir = "." ! directory to read input ice restarts |
|---|
| 38 | cn_icerst_outdir = "." ! directory to write output ice restarts |
|---|
| 39 | / |
|---|
| 40 | !------------------------------------------------------------------------------ |
|---|
| 41 | &namitd ! Ice discretization |
|---|
| 42 | !------------------------------------------------------------------------------ |
|---|
| 43 | ln_cat_hfn = .true. ! ice categories are defined by a function following rn_himean**(-0.05) |
|---|
| 44 | rn_himean = 2.0 ! expected domain-average ice thickness (m) |
|---|
| 45 | ln_cat_usr = .false. ! ice categories are defined by rn_catbnd below (m) |
|---|
| 46 | rn_catbnd = 0.,0.45,1.1,2.1,3.7,6.0 |
|---|
| 47 | rn_himin = 0.1 ! minimum ice thickness (m) used in remapping |
|---|
| 48 | / |
|---|
| 49 | !------------------------------------------------------------------------------ |
|---|
| 50 | &namdyn ! Ice dynamics |
|---|
| 51 | !------------------------------------------------------------------------------ |
|---|
| 52 | ln_dynFULL = .true. ! dyn.: full ice dynamics (rheology + advection + ridging/rafting + correction) |
|---|
| 53 | ln_dynRHGADV = .false. ! dyn.: no ridge/raft & no corrections (rheology + advection) |
|---|
| 54 | ln_dynADV = .false. ! dyn.: only advection w prescribed vel.(rn_uvice + advection) |
|---|
| 55 | rn_uice = 0.00001 ! prescribed ice u-velocity |
|---|
| 56 | rn_vice = 0. ! prescribed ice v-velocity |
|---|
| 57 | rn_ishlat = 2. ! free slip (0) ; partial slip (0-2) ; no slip (2) ; strong slip (>2) |
|---|
| 58 | ln_landfast = .false. ! landfast ice parameterization (T or F) |
|---|
| 59 | rn_gamma = 0.15 ! fraction of ocean depth that ice must reach to initiate landfast |
|---|
| 60 | ! recommended range: [0.1 ; 0.25] |
|---|
| 61 | rn_icebfr = 10. ! maximum bottom stress per unit area of contact [N/m2] |
|---|
| 62 | ! a very large value ensures ice velocity=0 even with a small contact area |
|---|
| 63 | ! recommended range: ?? (should be greater than atm-ice stress => >0.1 N/m2) |
|---|
| 64 | rn_lfrelax = 1.e-5 ! relaxation time scale to reach static friction [s-1] |
|---|
| 65 | / |
|---|
| 66 | !------------------------------------------------------------------------------ |
|---|
| 67 | &namdyn_rdgrft ! Ice ridging/rafting |
|---|
| 68 | !------------------------------------------------------------------------------ |
|---|
| 69 | ! -- ice_rdgrft_strength -- ! |
|---|
| 70 | ln_str_H79 = .true. ! ice strength param.: Hibler_79 => P = pstar*<h>*exp(-c_rhg*A) |
|---|
| 71 | rn_pstar = 2.0e+04 ! ice strength thickness parameter [N/m2] |
|---|
| 72 | rn_crhg = 20.0 ! ice strength conc. parameter (-) |
|---|
| 73 | ! -- ice_rdgrft -- ! |
|---|
| 74 | rn_csrdg = 0.5 ! fraction of shearing energy contributing to ridging |
|---|
| 75 | ! -- ice_rdgrft_prep -- ! |
|---|
| 76 | ln_partf_lin = .false. ! Linear ridging participation function (Thorndike et al, 1975) |
|---|
| 77 | rn_gstar = 0.15 ! fractional area of thin ice being ridged |
|---|
| 78 | ln_partf_exp = .true. ! Exponential ridging participation function (Lipscomb, 2007) |
|---|
| 79 | rn_astar = 0.03 ! exponential measure of ridging ice fraction [set to 0.05 if hstar=100] |
|---|
| 80 | ln_ridging = .true. ! ridging activated (T) or not (F) |
|---|
| 81 | rn_hstar = 25.0 ! determines the maximum thickness of ridged ice [m] (Hibler, 1980) |
|---|
| 82 | rn_porordg = 0.3 ! porosity of newly ridged ice (Lepparanta et al., 1995) |
|---|
| 83 | rn_fsnwrdg = 0.5 ! snow volume fraction that survives in ridging |
|---|
| 84 | rn_fpndrdg = 1.0 ! pond fraction that survives in ridging (small a priori) |
|---|
| 85 | ln_rafting = .true. ! rafting activated (T) or not (F) |
|---|
| 86 | rn_hraft = 0.75 ! threshold thickness for rafting [m] |
|---|
| 87 | rn_craft = 5.0 ! squeezing coefficient used in the rafting function |
|---|
| 88 | rn_fsnwrft = 0.5 ! snow volume fraction that survives in rafting |
|---|
| 89 | rn_fpndrft = 1.0 ! pond fraction that survives in rafting (0.5 a priori) |
|---|
| 90 | / |
|---|
| 91 | !------------------------------------------------------------------------------ |
|---|
| 92 | &namdyn_rhg ! Ice rheology |
|---|
| 93 | !------------------------------------------------------------------------------ |
|---|
| 94 | ln_rhg_EVP = .true. ! EVP rheology |
|---|
| 95 | ln_aEVP = .false. ! adaptive rheology (Kimmritz et al. 2016 & 2017) |
|---|
| 96 | rn_creepl = 2.0e-9 ! creep limit [1/s] |
|---|
| 97 | rn_ecc = 2.0 ! eccentricity of the elliptical yield curve |
|---|
| 98 | nn_nevp = 120 ! number of EVP subcycles |
|---|
| 99 | rn_relast = 0.333 ! ratio of elastic timescale to ice time step: Telast = dt_ice * rn_relast |
|---|
| 100 | ! advised value: 1/3 (rn_nevp=120) or 1/9 (rn_nevp=300) |
|---|
| 101 | / |
|---|
| 102 | !------------------------------------------------------------------------------ |
|---|
| 103 | &namdyn_adv ! Ice advection |
|---|
| 104 | !------------------------------------------------------------------------------ |
|---|
| 105 | ln_adv_Pra = .false. ! Advection scheme (Prather) |
|---|
| 106 | ln_adv_UMx = .true. ! Advection scheme (Ultimate-Macho) |
|---|
| 107 | nn_UMx = 5 ! order of the scheme for UMx (1-5 ; 20=centered 2nd order) |
|---|
| 108 | / |
|---|
| 109 | !------------------------------------------------------------------------------ |
|---|
| 110 | &namforcing ! Ice surface forcing |
|---|
| 111 | !------------------------------------------------------------------------------ |
|---|
| 112 | rn_cio = 5.0e-03 ! ice-ocean drag coefficient (-) |
|---|
| 113 | rn_blow_s = 0.66 ! mesure of snow blowing into the leads |
|---|
| 114 | ! = 1 => no snow blowing, < 1 => some snow blowing |
|---|
| 115 | nn_flxdist = -1 ! Redistribute heat flux over ice categories |
|---|
| 116 | ! =-1 Do nothing (needs N(cat) fluxes) |
|---|
| 117 | ! = 0 Average N(cat) fluxes then apply the average over the N(cat) ice |
|---|
| 118 | ! = 1 Average N(cat) fluxes then redistribute over the N(cat) ice using T-ice and albedo sensitivity |
|---|
| 119 | ! = 2 Redistribute a single flux over categories |
|---|
| 120 | nice_jules = 0 ! Jules coupling (0=OFF, 1=EMULATED, 2=ACTIVE) |
|---|
| 121 | / |
|---|
| 122 | !------------------------------------------------------------------------------ |
|---|
| 123 | &namthd ! Ice thermodynamics |
|---|
| 124 | !------------------------------------------------------------------------------ |
|---|
| 125 | ln_icedH = .true. ! activate ice thickness change from growing/melting (T) or not (F) |
|---|
| 126 | ln_icedA = .true. ! activate lateral melting param. (T) or not (F) |
|---|
| 127 | ln_icedO = .true. ! activate ice growth in open-water (T) or not (F) |
|---|
| 128 | ln_icedS = .true. ! activate brine drainage (T) or not (F) |
|---|
| 129 | / |
|---|
| 130 | !------------------------------------------------------------------------------ |
|---|
| 131 | &namthd_zdf ! Ice heat diffusion |
|---|
| 132 | !------------------------------------------------------------------------------ |
|---|
| 133 | ln_zdf_BL99 = .true. ! Heat diffusion follows Bitz and Lipscomb 1999 |
|---|
| 134 | ln_cndi_U64 = .false. ! sea ice thermal conductivity: k = k0 + beta.S/T (Untersteiner, 1964) |
|---|
| 135 | ln_cndi_P07 = .true. ! sea ice thermal conductivity: k = k0 + beta1.S/T - beta2.T (Pringle et al., 2007) |
|---|
| 136 | rn_cnd_s = 0.31 ! thermal conductivity of the snow (0.31 W/m/K, Maykut and Untersteiner, 1971) |
|---|
| 137 | ! Obs: 0.1-0.5 (Lecomte et al, JAMES 2013) |
|---|
| 138 | rn_kappa_i = 1.0 ! radiation attenuation coefficient in sea ice [1/m] |
|---|
| 139 | / |
|---|
| 140 | !------------------------------------------------------------------------------ |
|---|
| 141 | &namthd_da ! Ice lateral melting |
|---|
| 142 | !------------------------------------------------------------------------------ |
|---|
| 143 | rn_beta = 1.0 ! coef. beta for lateral melting param. Recommended range=[0.8-1.2] |
|---|
| 144 | ! => decrease = more melt and melt peaks toward higher concentration (A~0.5 for beta=1 ; A~0.8 for beta=0.2) |
|---|
| 145 | ! 0.3 = best fit for western Fram Strait and Antarctica |
|---|
| 146 | ! 1.4 = best fit for eastern Fram Strait |
|---|
| 147 | rn_dmin = 8. ! minimum floe diameter for lateral melting param. Recommended range=[6-10] |
|---|
| 148 | ! => 6 vs 8m = +40% melting at the peak (A~0.5) |
|---|
| 149 | ! 10 vs 8m = -20% melting |
|---|
| 150 | / |
|---|
| 151 | !------------------------------------------------------------------------------ |
|---|
| 152 | &namthd_do ! Ice growth in open water |
|---|
| 153 | !------------------------------------------------------------------------------ |
|---|
| 154 | rn_hinew = 0.1 ! thickness for new ice formation in open water (m), must be larger than rn_hnewice |
|---|
| 155 | ln_frazil = .false. ! Frazil ice parameterization (ice collection as a function of wind) |
|---|
| 156 | rn_maxfraz = 1.0 ! maximum fraction of frazil ice collecting at the ice base |
|---|
| 157 | rn_vfraz = 0.417 ! thresold drift speed for frazil ice collecting at the ice bottom (m/s) |
|---|
| 158 | rn_Cfraz = 5.0 ! squeezing coefficient for frazil ice collecting at the ice bottom |
|---|
| 159 | / |
|---|
| 160 | !------------------------------------------------------------------------------ |
|---|
| 161 | &namthd_sal ! Ice salinity |
|---|
| 162 | !------------------------------------------------------------------------------ |
|---|
| 163 | nn_icesal = 2 ! ice salinity option |
|---|
| 164 | ! 1: constant ice salinity (S=rn_icesal) |
|---|
| 165 | ! 2: varying salinity parameterization S(z,t) |
|---|
| 166 | ! 3: prescribed salinity profile S(z), Schwarzacher, 1959 |
|---|
| 167 | rn_icesal = 4. ! (nn_icesal=1) ice salinity (g/kg) |
|---|
| 168 | rn_sal_gd = 5. ! restoring ice salinity, gravity drainage (g/kg) |
|---|
| 169 | rn_time_gd = 1.73e+6 ! restoring time scale, gravity drainage (s) |
|---|
| 170 | rn_sal_fl = 2. ! restoring ice salinity, flushing (g/kg) |
|---|
| 171 | rn_time_fl = 8.64e+5 ! restoring time scale, flushing (s) |
|---|
| 172 | rn_simax = 20. ! maximum tolerated ice salinity (g/kg) |
|---|
| 173 | rn_simin = 0.1 ! minimum tolerated ice salinity (g/kg) |
|---|
| 174 | / |
|---|
| 175 | !------------------------------------------------------------------------------ |
|---|
| 176 | &namthd_pnd ! Melt ponds |
|---|
| 177 | !------------------------------------------------------------------------------ |
|---|
| 178 | ln_pnd_H12 = .false. ! activate evolutive melt ponds (from Holland et al 2012) |
|---|
| 179 | ln_pnd_fwb = .false. ! melt ponds store freshwater or not |
|---|
| 180 | ln_pnd_CST = .false. ! activate constant melt ponds |
|---|
| 181 | rn_apnd = 0.2 ! prescribed pond fraction, at Tsu=0 |
|---|
| 182 | rn_hpnd = 0.05 ! prescribed pond depth, at Tsu=0 |
|---|
| 183 | ln_pnd_alb = .false. ! melt ponds affect albedo or not |
|---|
| 184 | / |
|---|
| 185 | !------------------------------------------------------------------------------ |
|---|
| 186 | &namini ! Ice initialization |
|---|
| 187 | !------------------------------------------------------------------------------ |
|---|
| 188 | ln_iceini = .true. ! activate ice initialization (T) or not (F) |
|---|
| 189 | ln_iceini_file = .false. ! netcdf file provided for initialization (T) or not (F) |
|---|
| 190 | rn_thres_sst = 2.0 ! max delta temp. above Tfreeze with initial ice = (sst - tfreeze) |
|---|
| 191 | rn_hts_ini_n = 0.3 ! initial real snow thickness (m), North |
|---|
| 192 | rn_hts_ini_s = 0.3 ! " " South |
|---|
| 193 | rn_hti_ini_n = 3.0 ! initial real ice thickness (m), North |
|---|
| 194 | rn_hti_ini_s = 1.0 ! " " South |
|---|
| 195 | rn_ati_ini_n = 0.9 ! initial ice concentration (-), North |
|---|
| 196 | rn_ati_ini_s = 0.9 ! " " South |
|---|
| 197 | rn_smi_ini_n = 6.3 ! initial ice salinity (g/kg), North |
|---|
| 198 | rn_smi_ini_s = 6.3 ! " " South |
|---|
| 199 | rn_tmi_ini_n = 270. ! initial ice/snw temperature (K), North |
|---|
| 200 | rn_tmi_ini_s = 270. ! " " South |
|---|
| 201 | |
|---|
| 202 | sn_hti = 'Ice_initialization' , -12 ,'hti' , .false. , .true., 'yearly' , '' , '', '' |
|---|
| 203 | sn_hts = 'Ice_initialization' , -12 ,'hts' , .false. , .true., 'yearly' , '' , '', '' |
|---|
| 204 | sn_ati = 'Ice_initialization' , -12 ,'ati' , .false. , .true., 'yearly' , '' , '', '' |
|---|
| 205 | sn_tsu = 'Ice_initialization' , -12 ,'tsu' , .false. , .true., 'yearly' , '' , '', '' |
|---|
| 206 | sn_tmi = 'Ice_initialization' , -12 ,'tmi' , .false. , .true., 'yearly' , '' , '', '' |
|---|
| 207 | sn_smi = 'Ice_initialization' , -12 ,'smi' , .false. , .true., 'yearly' , '' , '', '' |
|---|
| 208 | cn_dir='./' |
|---|
| 209 | / |
|---|
| 210 | !------------------------------------------------------------------------------ |
|---|
| 211 | &namalb ! albedo parameters |
|---|
| 212 | !------------------------------------------------------------------------------ |
|---|
| 213 | ! ! ! obs range (cloud-sky) |
|---|
| 214 | rn_alb_sdry = 0.85 ! dry snow albedo : 0.85 -- 0.87 |
|---|
| 215 | rn_alb_smlt = 0.75 ! melting snow albedo : 0.72 -- 0.82 |
|---|
| 216 | rn_alb_idry = 0.60 ! dry ice albedo : 0.54 -- 0.65 |
|---|
| 217 | rn_alb_imlt = 0.50 ! bare puddled ice albedo : 0.49 -- 0.58 |
|---|
| 218 | rn_alb_dpnd = 0.27 ! ponded ice albedo : 0.10 -- 0.30 |
|---|
| 219 | / |
|---|
| 220 | !------------------------------------------------------------------------------ |
|---|
| 221 | &namdia ! Diagnostics |
|---|
| 222 | !------------------------------------------------------------------------------ |
|---|
| 223 | ln_icediachk = .false. ! check online the heat, mass & salt budgets (T) or not (F) |
|---|
| 224 | ln_icediahsb = .false. ! output the heat, mass & salt budgets (T) or not (F) |
|---|
| 225 | ln_icectl = .false. ! ice points output for debug (T or F) |
|---|
| 226 | iiceprt = 10 ! i-index for debug |
|---|
| 227 | jiceprt = 10 ! j-index for debug |
|---|
| 228 | / |
|---|
