- Timestamp:
- 2015-02-06T19:13:17+01:00 (9 years ago)
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branches/2015/dev_r5044_CNRS_LIM3CLEAN/NEMOGCM/CONFIG/SHARED/namelist_ice_lim3_ref
r5060 r5068 1 1 !!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 2 !! NEMO/LIM3 : 1 - dynamics/advection/thermo (namicerun) 3 !! namelists 2 - ice intialisation (namiceini) 4 !! 3 - ice dynamics (namicedyn) 5 !! 4 - ice advection (namicetrp) 6 !! 5 - thermodynamics (namicethd) 7 !! 6 - ice salinity (namicesal) 8 !! 7 - mechanical redistribution of ice (namiceitdme) 9 !! 8 - ice diagnostics (namicedia) 10 !! 9 - ice outputs (namiceout) 2 !! LIM3 namelist : 3 !! 1 - Generic parameters (namicerun) 4 !! 2 - Ice initialization (namiceini) 5 !! 3 - Ice discretization (namiceitd) 6 !! 4 - Ice dynamics and transport (namicedyn) 7 !! 5 - Ice thermodynamics (namicethd) 8 !! 6 - Ice salinity (namicesal) 9 !! 7 - Ice mechanical redistribution (namiceitdme) 11 10 !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 12 13 !----------------------------------------------------------------------- 14 &namicerun ! Share parameters for dynamics/advection/thermo 15 !----------------------------------------------------------------------- 16 jpl = 5 ! number of ice categories 17 nlay_i = 2 ! number of ice layers 18 nlay_s = 1 ! number of snow layers 11 ! 12 !------------------------------------------------------------------------------ 13 &namicerun ! Generic parameters 14 !------------------------------------------------------------------------------ 19 15 cn_icerst_in = "restart_ice" ! suffix of ice restart name (input) 20 16 cn_icerst_out = "restart_ice" ! suffix of ice restart name (output) 21 17 ln_limdyn = .true. ! ice dynamics (T) or thermodynamics only (F) 22 amax = 0.999 ! maximum tolerated ice concentration18 rn_amax = 0.999 ! maximum tolerated ice concentration 23 19 ln_nicep = .false. ! ice points output for debug (yes or no) 24 20 ln_limdiahsb = .false. ! check the heat and salt budgets (T) or not (F) 25 21 ln_limdiaout = .true. ! output the heat and salt budgets (T) or not (F) 26 22 / 27 !----------------------------------------------------------------------- 28 &namiceitd ! ice thickness distribution 29 !----------------------------------------------------------------------- 30 nn_itdshp = 1 ! shape of ice categories distribution following: 31 ! 1 = tanh function 32 ! 2 = h^(-alpha) 33 rn_itmean = 2.5 ! mean thickness of the domain (used to compute the distribution, nn_itdshp = 2 only) 23 !------------------------------------------------------------------------------ 24 &namiceini ! Ice initialization 25 !------------------------------------------------------------------------------ 26 ln_iceini = .true. ! activate ice initialization (T) or not (F) 27 rn_thres_sst = 2.0 ! maximum water temperature with initial ice (degC) 28 rn_hts_ini_n = 0.3 ! initial real snow thickness (m), North 29 rn_hts_ini_s = 0.3 ! " " South 30 rn_hti_ini_n = 3.0 ! initial real ice thickness (m), North 31 rn_hti_ini_s = 1.0 ! " " South 32 rn_ati_ini_n = 0.9 ! initial ice concentration (-), North 33 rn_ati_ini_s = 0.9 ! " " South 34 rn_smi_ini_n = 6.3 ! initial ice salinity (g/kg), North 35 rn_smi_ini_s = 6.3 ! " " South 36 rn_tmi_ini_n = 270. ! initial ice/snw temperature (K), North 37 rn_tmi_ini_s = 270. ! " " South 34 38 / 35 !----------------------------------------------------------------------- 36 &namiceini ! ice initialization 37 !----------------------------------------------------------------------- 38 ln_limini = .true. ! activate ice initialization (T) or not (F) 39 thres_sst = 2.0 ! threshold water temperature for initial sea ice 40 hts_ini_n = 0.3 ! initial snow thickness (North) 41 hts_ini_s = 0.3 ! " " (South) 42 hti_ini_n = 3.0 ! initial ice thickness (North) 43 hti_ini_s = 1.0 ! " " (South) 44 ati_ini_n = 0.9 ! initial ice concentration (North) 45 ati_ini_s = 0.9 ! " " (South) 46 smi_ini_n = 6.3 ! initial ice salinity (North) 47 smi_ini_s = 6.3 ! " " (South) 48 tmi_ini_n = 270. ! initial ice/snw temp (North) 49 tmi_ini_s = 270. ! initial ice/snw temp (South) 39 !------------------------------------------------------------------------------ 40 &namiceitd ! Ice discretization 41 !------------------------------------------------------------------------------ 42 jpl = 5 ! number of ice categories 43 nlay_i = 2 ! number of ice layers 44 nlay_s = 1 ! number of snow layers (only 1 is working) 45 nn_catbnd = 1 ! computation of ice category boundaries based on 46 ! 1: tanh function 47 ! 2: h^(-alpha), function of rn_himean 48 rn_himean = 2.5 ! expected domain-average ice thickness (m), nn_catbnd = 2 only 50 49 / 51 !----------------------------------------------------------------------- 52 &namicedyn ! ice dynamics 53 !----------------------------------------------------------------------- 54 cw = 5.0e-03 ! ice-ocean drag coefficient 55 pstar = 2.0e+04 ! 1st bulk-rheology parameter (N/m) 56 c_rhg = 20.0 ! 2nd bulk-rhelogy parameter 57 creepl = 1.0e-12 ! creep limit (s-1) 58 ecc = 2.0 ! eccentricity of the elliptical yield curve 59 ahi0 = 350.e0 ! horizontal eddy diffusivity coefficient for sea-ice (m2/s) - DO NOT CHANGE IT 60 ! the value is set up for orca2 and is adapted automatically in the code 61 ! depending on the resolution of your experiment 62 nevp = 120 ! number of EVP subcycles 63 relast = 0.333 ! ratio of elastic timescale to ice time step (1/3 if nevp=120, 1/9 if nevp=300) 50 !------------------------------------------------------------------------------ 51 &namicedyn ! Ice dynamics and transport 52 !------------------------------------------------------------------------------ 53 nn_icestr = 0 ! ice strength parameteriztaion !MV, replaces ridge_scheme_swi 54 ! 0: Hibler_79 P = pstar*<h>*exp(-c_rhg*A) 55 ! 1: Rothrock_75 P = Cf*coeff*integral(wr.h^2) 56 nn_icestr_bvf = 0 ! ice strength function brine volume (1) or not (0) !MV replaces brinstren_swi 57 rn_pstar = 2.0e+04 ! ice strength thickness parameter (N/m2), nn_icestr = 0 58 rn_crhg = 20.0 ! ice strength conc. parameter (-), nn_icestr = 0 59 rn_cio = 5.0e-03 ! ice-ocean drag coefficient (-) 60 rn_creepl = 1.0e-12 ! creep limit (s-1) 61 rn_ecc = 2.0 ! eccentricity of the elliptical yield curve 62 nn_nevp = 120 ! number of EVP subcycles 63 rn_relast = 0.333 ! ratio of elastic timescale to ice time step: Telast = dt_ice * rn_relast 64 ! advised value: 1/3 (rn_nevp=120) or 1/9 (rn_nevp=300) 65 ! nn_ahi0 = 2 ! horizontal diffusivity computation ! MV only 2 is coded now 66 ! ! 0: use rn_ahi0_ref 67 ! ! 1: use rn_ahi0_ref . mean grid cell length / ( 2deg mean grid cell length ) 68 ! ! 2: use rn_ahi0_ref . grid cell length / ( 2deg mean grid cell length ) 69 rn_ahi0_ref = 350.0 ! horizontal sea ice diffusivity (m2/s) 70 ! if nn_ahi0 > 0, rn_ahi0_ref is the reference value at a nominal 2 deg resolution 64 71 / 65 !----------------------------------------------------------------------- 66 &namicethd ! ice thermodynamics 67 !----------------------------------------------------------------------- 68 hiccrit = 0.1 ! thickness for new ice formation in open water 69 fraz_swi = 0 ! use frazil ice collection thickness as a function of wind (1.0) or not (0.0) 70 maxfrazb = 0.0 ! maximum portion of frazil ice collecting at the ice bottom 71 vfrazb = 0.417 ! thresold drift speed for frazil ice collecting at the ice bottom 72 Cfrazb = 5.0 ! squeezing coefficient for frazil ice collecting at the ice bottom 73 hiclim = 0.10 ! minimum thickness of the first thickness category, must be smaller than hiccrit 74 betas = 0.6 ! exponent in lead-ice fractionation of snow precipitation 0.66 75 ! betas = 1 -> equipartition, betas < 1 -> more on leads 76 kappa_i = 1.0 ! extinction radiation parameter in sea ice (m-1) 77 nconv_i_thd = 50 ! maximal number of iterations for heat diffusion computation 78 maxer_i_thd = 0.0001 ! temperature error tolerance after heat diffusion 79 thcon_i_swi = 1 ! sea ice thermal conductivity, Untersteiner_64 (0) or Pringle_et_al_07 (1) 80 nn_monocat = 0 ! virtual ITD mono-category parameterizations (1) or not (0); 1 ok for jpl=1 only 81 ! 2=replace ridging by piling, 3=activate G(he) only, 4=activate lateral melting only) --- those are temporary test options 72 !------------------------------------------------------------------------------ 73 &namicethd ! Ice thermodynamics 74 !------------------------------------------------------------------------------ 75 rn_hnewice = 0.1 ! thickness for new ice formation in open water (m) 76 nn_frazil = 0 ! use frazil ice collection thickness as a function of wind (1.0) or not (0.0) 77 rn_maxfrazb = 0.0 ! maximum fraction of frazil ice collecting at the ice base 78 rn_vfrazb = 0.417 ! thresold drift speed for frazil ice collecting at the ice bottom (m/s) 79 rn_Cfrazb = 5.0 ! squeezing coefficient for frazil ice collecting at the ice bottom 80 rn_himin = 0.10 ! minimum ice thickness (m) used in remapping, must be smaller than rn_hnewice 81 rn_betas = 0.66 ! exponent in lead-ice repratition of snow precipitation 82 ! betas = 1 -> equipartition, betas < 1 -> more on leads 83 rn_kappa_i = 1.0 ! radiation attenuation coefficient in sea ice (m-1) 84 nn_conv_dif = 50 ! maximal number of iterations for heat diffusion computation 85 rn_terr_dif = 0.0001 ! maximum temperature after heat diffusion (degC) 86 nn_ice_thcon= 1 ! sea ice thermal conductivity 87 ! 0: k = k0 + beta.S/T (Untersteiner, 1964) 88 ! 1: k = k0 + beta1.S/T - beta2.T (Pringle et al., 2007) 89 nn_monocat = 0 ! virtual ITD mono-category parameterizations (1, jpl = 1 only) or not (0) 90 ! 2: simple piling instead of ridging --- temporary option 91 ! 3: activate G(he) only --- temporary option 92 ! 4: activate lateral melting only --- temporary option 82 93 / 83 !----------------------------------------------------------------------- 84 &namicesal ! ice salinity 85 !----------------------------------------------------------------------- 86 num_sal = 2 ! S=bulk_sal (1), S(z,t) - (2), S(z) Schwarzacher_59 (3) 87 bulk_sal = 4.0 ! if 1 is used, it represents the ice salinity 88 sal_G = 5.00 ! restoring salinity, gravity drainage (g/kg) 89 time_G = 1.728e+6 ! restoring time scale, gravity drainage (s) 90 sal_F = 2.00 ! restoring salinity, flushing (g/kg) 91 time_F = 8.640e+5 ! restoring time, flushing (s) 92 s_i_max = 20.0 ! maximum tolerated ice salinity (g/kg) 93 s_i_min = 0.1 ! minimum tolerated ice salinity (g/kg) 94 !------------------------------------------------------------------------------ 95 &namicesal ! Ice salinity 96 !------------------------------------------------------------------------------ 97 nn_icesal = 2 ! ice salinity option 98 ! 1: constant ice salinity (S=rn_icesal) 99 ! 2: varying salinity parameterization S(z,t) 100 ! 3: prescribed salinity profile S(z), Schwarzacher, 1959 101 rn_icesal = 4. ! ice salinity (g/kg, nn_icesal = 1 only) 102 rn_sal_gd = 5. ! restoring ice salinity, gravity drainage (g/kg) 103 rn_time_gd = 1.73e+6 ! restoring time scale, gravity drainage (s) 104 rn_sal_fl = 2. ! restoring ice salinity, flushing (g/kg) 105 rn_time_fl = 8.64e+5 ! restoring time scale, flushing (s) 106 rn_simax = 20. ! maximum tolerated ice salinity (g/kg) 107 rn_simin = 0.1 ! minimum tolerated ice salinity (g/kg) 94 108 / 95 !----------------------------------------------------------------------- 96 &namiceitdme ! parameters for mechanical redistribution of ice97 !----------------------------------------------------------------------- 98 r idge_scheme_swi = 0 ! ice strength parameteriztaion, Hibler_79 (0), Rothrock_75 (1)99 Cs = 0.50 ! ratioof shearing energy contributing to ridging100 Cf = 17.0 ! ratio of ridging work to potential energy changein ridging101 fsnowrdg = 0.5 ! snow volume fraction that survives in ridging102 fsnowrft = 0.5 ! snow volume fraction that survives in rafting103 Gstar = 0.15 ! fractional area of thin ice being ridged (partfun_swi = 0)104 astar = 0.05 ! measures fractional area of thin ice being ridged (partfun_swi = 1)105 Hstar = 100.0 ! determines the maximum thickness of ridged ice (m)106 r aft_swi = 1 ! rafting activated (1) or not (0)107 hparmeter = 0.75 ! threshold thickness for rafting (m)108 Craft = 5.0 ! coefficient used in the rafting function109 r idge_por = 0.3 ! porosity of newly ridged ice110 partfun_swi = 1 ! participation function: linear, Thorndike et al 75 (0) or exponential, Lipscomb 07 (1)111 brinstren_swi = 0 ! ice strength is a function of brine volume fraction (1) or not (0)109 !------------------------------------------------------------------------------ 110 &namiceitdme ! Ice mechanical redistribution (ridging and rafting) 111 !------------------------------------------------------------------------------ 112 rn_pe_rdg = 17.0 ! ridging work divided by pot. energy change in ridging, nn_ice str = 1 ! MV replaces Cf 113 rn_Cs = 0.5 ! fraction of shearing energy contributing to ridging 114 rn_fsnowrdg = 0.5 ! snow volume fraction that survives in ridging 115 rn_fsnowrft = 0.5 ! snow volume fraction that survives in rafting 116 nn_partfun = 1 ! type of ridging participation function 117 ! 0: linear (Thorndike et al, 1975) 118 ! 1: exponential (Lipscomb, 2007 119 rn_gstar = 0.15 ! fractional area of thin ice being ridged (nn_partfun = 0) 120 rn_astar = 0.05 ! exponential measure of ridging ice fraction (nn_partfun = 1) 121 rn_hstar = 100.0 ! determines the maximum thickness of ridged ice (m) (Hibler, 1980) 122 nn_rafting = 1 ! rafting activated (1) or not (0) 123 rn_hraft = 0.75 ! threshold thickness for rafting (m) !MV replaces h_parmeter 124 rn_craft = 5.0 ! squeezing coefficient used in the rafting function 125 rn_por_rdg = 0.3 ! porosity of newly ridged ice (Lepparanta et al., 1995) 112 126 /
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