- Timestamp:
- 06/03/20 09:43:39 (4 years ago)
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-
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CONFIG/UNIFORM/v6/IPSLCM6.5/GENERAL/PARAM/namelist_ice_ORCA1_cfg
r5066 r5109 41 41 &namdyn_rhg ! Ice rheology 42 42 !------------------------------------------------------------------------------ 43 ln_aEVP = .false. ! adaptive rheology (Kimmritz et al. 2016 & 2017) 43 ln_rhg_EVP = .true. ! EVP rheology 44 ln_aEVP = .false. ! adaptive rheology (Kimmritz et al. 2016 & 2017) 45 rn_creepl = 2.0e-9 ! creep limit [1/s] 46 rn_ecc = 2.0 ! eccentricity of the elliptical yield curve 47 nn_nevp = 120 ! number of EVP subcycles 48 rn_relast = 0.333 ! ratio of elastic timescale to ice time step: Telast = dt_ice * rn_relast 49 ! advised value: 1/3 (rn_nevp=120) or 1/9 (rn_nevp=300) 50 ln_rhg_chkcvg = .false. ! check convergence of rheology (outputs: file ice_cvg.nc & variable uice_cvg) 44 51 / 45 52 !------------------------------------------------------------------------------ … … 50 57 &namsbc ! Ice surface boundary conditions 51 58 !------------------------------------------------------------------------------ 52 rn_blow_s = 0.66 ! mesure of snow blowing into the leads 59 rn_cio = 5.0e-03 ! ice-ocean drag coefficient (-) 60 nn_snwfra = 2 ! calculate the fraction of ice covered by snow (for zdf and albedo) 61 ! = 2 fraction = hsnw / (hsnw+0.02) [CICE formulation] 62 rn_snwblow = 0.66 ! mesure of snow blowing into the leads 53 63 ! = 1 => no snow blowing, < 1 => some snow blowing 54 64 nn_flxdist = 2 ! Redistribute heat flux over ice categories 55 65 ! = 2 Redistribute a single flux over categories 66 ln_cndflx = .false. ! Use conduction flux as surface boundary conditions (i.e. for Jules coupling) 67 ln_cndemulate = .false. ! emulate conduction flux (if not provided in the inputs) 68 nn_qtrice = 1 ! Solar flux transmitted thru the surface scattering layer: 69 ! = 1 Lebrun 2019 (equals 0.3 anytime with different melting/dry snw conductivities) 56 70 / 57 71 !------------------------------------------------------------------------------ 58 72 &namthd ! Ice thermodynamics 59 73 !------------------------------------------------------------------------------ 74 ln_icedH = .true. ! activate ice thickness change from growing/melting (T) or not (F) 75 ln_icedA = .true. ! activate lateral melting param. (T) or not (F) 76 ln_icedO = .true. ! activate ice growth in open-water (T) or not (F) 77 ln_icedS = .true. ! activate brine drainage (T) or not (F) 78 ! 79 ln_leadhfx = .false. ! heat in the leads is used to melt sea-ice before warming the ocean 60 80 / 61 81 !------------------------------------------------------------------------------ 62 82 &namthd_zdf ! Ice heat diffusion 63 83 !------------------------------------------------------------------------------ 64 rn_cnd_s = 0. 30 ! thermal conductivity of the snow (0.31 W/m/K, Maykut and Untersteiner, 1971)84 rn_cnd_s = 0.50 ! thermal conductivity of the snow (0.31 W/m/K, Maykut and Untersteiner, 1971) 65 85 ! Obs: 0.1-0.5 (Lecomte et al, JAMES 2013) 66 86 / … … 80 100 &namthd_pnd ! Melt ponds 81 101 !------------------------------------------------------------------------------ 102 ln_pnd = .true. ! activate melt ponds or not 103 ln_pnd_LEV = .true. ! level ice melt ponds (from Flocco et al 2007,2010 & Holland et al 2012) 104 rn_apnd_min = 0.15 ! minimum ice fraction that contributes to melt pond. range: 0.0 -- 0.15 ?? 105 rn_apnd_max = 0.85 ! maximum ice fraction that contributes to melt pond. range: 0.7 -- 0.85 ?? 106 ln_pnd_CST = .false. ! constant melt ponds 107 rn_apnd = 0.2 ! prescribed pond fraction, at Tsu=0 degC 108 rn_hpnd = 0.05 ! prescribed pond depth, at Tsu=0 degC 109 ln_pnd_lids = .true. ! frozen lids on top of the ponds (only for ln_pnd_LEV) 110 ln_pnd_alb = .true. ! effect of melt ponds on ice albedo 82 111 / 83 112 !------------------------------------------------------------------------------ 84 113 &namini ! Ice initialization 85 114 !------------------------------------------------------------------------------ 115 nn_iceini_file = _AUTO_ ! netcdf file provided for initialization 116 ! 86 117 rn_thres_sst = 0.5 ! max temp. above Tfreeze with initial ice = (sst - tfreeze) 87 rn_hti_ini_n = 3.0 ! initial ice thickness (m), North118 rn_hti_ini_n = 1.0 ! initial ice thickness (m), North 88 119 rn_hti_ini_s = 1.0 ! " " South 89 120 rn_hts_ini_n = 0.3 ! initial snow thickness (m), North … … 105 136 rn_hld_ini_n = 0.0 ! initial pond lid depth (m), North 106 137 rn_hld_ini_s = 0.0 ! " " South 107 nn_iceini_file = _AUTO_ ! netcdf file provided for initialization108 138 !______!______________________!___________________!___________!_____________!________!___________!__________________!__________!_______________! 109 139 ! ! file name ! frequency (hours) ! variable ! time interp.! clim ! 'yearly'/ ! weights filename ! rotation ! land/sea mask ! … … 124 154 &namalb ! albedo parameters 125 155 !------------------------------------------------------------------------------ 156 rn_alb_sdry = 0.87 ! dry snow albedo : 0.85 -- 0.87 157 rn_alb_smlt = 0.82 ! melting snow albedo : 0.72 -- 0.82 158 rn_alb_idry = 0.65 ! dry ice albedo : 0.54 -- 0.65 159 rn_alb_imlt = 0.58 ! bare puddled ice albedo : 0.49 -- 0.58 160 rn_alb_dpnd = 0.30 ! ponded ice albedo : 0.10 -- 0.30 126 161 / 127 162 !------------------------------------------------------------------------------
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