Changeset 5124 for trunk/NEMOGCM/CONFIG/SHARED/namelist_ice_lim3_ref
- Timestamp:
- 2015-03-04T17:06:20+01:00 (9 years ago)
- File:
-
- 1 edited
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trunk/NEMOGCM/CONFIG/SHARED/namelist_ice_lim3_ref (modified) (1 diff)
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trunk/NEMOGCM/CONFIG/SHARED/namelist_ice_lim3_ref
r4990 r5124 1 1 !!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 2 !! NEMO/LIM3 : 1 - dynamics/advection/thermo (namicerun) 3 !! namelists 2 - ice intialisation (namiceini) 4 !! 3 - ice dynamic (namicedyn) 5 !! 4 - ice advection (namicetrp) 6 !! 5 - thermodynamic (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 !----------------------------------------------------------------------- 11 ! 12 !------------------------------------------------------------------------------ 13 &namicerun ! Generic parameters 14 !------------------------------------------------------------------------------ 15 jpl = 5 ! number of ice categories 16 nlay_i = 2 ! number of ice layers 17 nlay_s = 1 ! number of snow layers (only 1 is working) 16 18 cn_icerst_in = "restart_ice" ! suffix of ice restart name (input) 17 19 cn_icerst_out = "restart_ice" ! suffix of ice restart name (output) 18 20 ln_limdyn = .true. ! ice dynamics (T) or thermodynamics only (F) 19 amax = 0.999 ! maximum ice concentration 20 cai = 1.40e-3 ! atmospheric drag over sea ice (clio) 21 cao = 1.00e-3 ! atmospheric drag over ocean (clio) 22 ln_nicep = .false. ! Ice points output for debug (yes or no) 23 ln_limdiahsb = .false. ! check the heat and salt budgets (T) or not (F) 21 rn_amax = 0.999 ! maximum tolerated ice concentration 22 ln_nicep = .false. ! ice points output for debug (yes or no) 23 ln_limdiahsb = .false. ! check the heat and salt budgets (T) or not (F) 24 24 ln_limdiaout = .true. ! output the heat and salt budgets (T) or not (F) 25 25 / 26 !----------------------------------------------------------------------- 27 &namiceini ! ice initialisation28 !----------------------------------------------------------------------- 29 ln_ limini = .false.! activate ice initialization (T) or not (F)30 thres_sst = 0.0 ! threshold water temperature for initial sea ice31 hts_ini_n = 0.3 ! initial snow thickness in the north32 hts_ini_s = 0.3 ! " " south33 hti_ini_n = 1.0 ! initial ice thickness in the north34 hti_ini_s = 1.0 ! " " south35 ati_ini_n = 0.9 ! initial ice concentration in the north36 ati_ini_s = 0.9 ! " " south37 smi_ini_n = 6.301 ! initial ice salinity in the north38 smi_ini_s = 6.301 ! " " south39 tmi_ini_n = 270. ! initial ice/snw temp in the north40 tmi_ini_s = 270. ! initial ice/snw temp in the south26 !------------------------------------------------------------------------------ 27 &namiceini ! Ice initialization 28 !------------------------------------------------------------------------------ 29 ln_iceini = .true. ! activate ice initialization (T) or not (F) 30 rn_thres_sst = 2.0 ! maximum water temperature with initial ice (degC) 31 rn_hts_ini_n = 0.3 ! initial real snow thickness (m), North 32 rn_hts_ini_s = 0.3 ! " " South 33 rn_hti_ini_n = 3.0 ! initial real ice thickness (m), North 34 rn_hti_ini_s = 1.0 ! " " South 35 rn_ati_ini_n = 0.9 ! initial ice concentration (-), North 36 rn_ati_ini_s = 0.9 ! " " South 37 rn_smi_ini_n = 6.3 ! initial ice salinity (g/kg), North 38 rn_smi_ini_s = 6.3 ! " " South 39 rn_tmi_ini_n = 270. ! initial ice/snw temperature (K), North 40 rn_tmi_ini_s = 270. ! " " South 41 41 / 42 !----------------------------------------------------------------------- 43 &namicedyn ! ice dynamic 44 !----------------------------------------------------------------------- 45 epsd = 1.0e-20 ! tolerance parameter 46 om = 0.5 ! relaxation constant 47 cw = 5.0e-03 ! drag coefficient for oceanic stress 48 pstar = 2.0e+04 ! 1st bulk-rheology parameter 49 c_rhg = 20.0 ! 2nd bulk-rhelogy parameter 50 creepl = 1.0e-12 ! creep limit 51 ecc = 2.0 ! eccentricity of the elliptical yield curve 52 ahi0 = 350.e0 ! horizontal eddy diffusivity coefficient for sea-ice [m2/s] 53 nevp = 120 ! number of iterations for subcycling in EVP 54 relast = 0.333 ! ratio of elastic timescale over ice time step (1/3 if nevp=120 ; 1/9 if nevp=300) 55 alphaevp = 1.0 ! coefficient for the solution of internal ice stresses 56 hminrhg = 0.001 ! ice volume (a*h in m) below which ice velocity equal ocean velocity 42 !------------------------------------------------------------------------------ 43 &namiceitd ! Ice discretization 44 !------------------------------------------------------------------------------ 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 57 49 / 58 !----------------------------------------------------------------------- 59 &namicethd ! ice thermodynamic 60 !----------------------------------------------------------------------- 61 hmelt = -0.15 ! maximum melting at the bottom 62 hiccrit = 0.1 ! ice thickness for lateral accretion 63 ! caution 1.0, 1.0 best value to be used!!! (gilles G.) ???? 64 fraz_swi = 0 ! use of frazil ice collection thickness in function of wind (1.0) or not (0.0) 65 maxfrazb = 0.0 ! maximum portion of frazil ice collecting at the ice bottom 66 vfrazb = 0.4166667 ! thresold drift speed for frazil ice collecting at the ice bottom 67 Cfrazb = 5.0 ! squeezing coefficient for frazil ice collecting at the ice bottom 68 hiclim = 0.10 ! minimum ice thickness 69 hnzst = 0.1 ! thickness of the surf. layer in temp. computation 70 parsub = 1.0 ! switch for snow sublimation or not 71 betas = 0.6 ! exponent in lead-ice fractionation of snow precipitation 0.66 72 ! betas = 1 -> equipartition, betas < 1 -> more on leads 73 kappa_i = 1.0 ! extinction radiation parameter in sea ice (1.0) 74 nconv_i_thd = 50 ! maximal number of iterations for heat diffusion computation 75 maxer_i_thd = 0.0001 ! maximal error in temperature for heat diffusion computation 76 thcon_i_swi = 1 ! switch for computation of thermal conductivity in the ice 77 ! (0) Untersteiner (1964), (1) Pringle et al. (2007) 50 !------------------------------------------------------------------------------ 51 &namicedyn ! Ice dynamics and transport 52 !------------------------------------------------------------------------------ 53 nn_icestr = 0 ! ice strength parameteriztaion 54 ! 0: Hibler_79 P = pstar*<h>*exp(-c_rhg*A) 55 ! 1: Rothrock_75 P = Cf*coeff*integral(wr.h^2) 56 ln_icestr_bvf = .false. ! ice strength function brine volume (T) or not (F) 57 rn_pe_rdg = 17.0 ! ridging work divided by pot. energy change in ridging, if nn_icestr = 1 58 rn_pstar = 2.0e+04 ! ice strength thickness parameter (N/m2), nn_icestr = 0 59 rn_crhg = 20.0 ! ice strength conc. parameter (-), nn_icestr = 0 60 rn_cio = 5.0e-03 ! ice-ocean drag coefficient (-) 61 rn_creepl = 1.0e-12 ! creep limit (s-1) 62 rn_ecc = 2.0 ! eccentricity of the elliptical yield curve 63 nn_nevp = 120 ! number of EVP subcycles 64 rn_relast = 0.333 ! ratio of elastic timescale to ice time step: Telast = dt_ice * rn_relast 65 ! advised value: 1/3 (rn_nevp=120) or 1/9 (rn_nevp=300) 66 nn_ahi0 = 2 ! horizontal diffusivity computation 67 ! 0: use rn_ahi0_ref 68 ! 1: use rn_ahi0_ref x mean grid cell length / ( 2deg mean grid cell length ) 69 ! 2: use rn_ahi0_ref x grid cell length / ( 2deg mean grid cell length ) 70 rn_ahi0_ref = 350.0 ! horizontal sea ice diffusivity (m2/s) 71 ! if nn_ahi0 > 0, rn_ahi0_ref is the reference value at a nominal 2 deg resolution 78 72 / 79 !----------------------------------------------------------------------- 80 &namicesal ! ice salinity 81 !----------------------------------------------------------------------- 82 num_sal = 2 ! salinity option: 1 -> S = bulk_sal 83 ! 2 -> S = S(z,t) with a simple parameterization 84 ! 3 -> S = S(z) profile of Scwharzacher [1959] 85 ! 4 -> S = S(h) Cox and Weeks [1974] 86 bulk_sal = 4.0 ! if 1 is used, it represents the ice salinity 87 sal_G = 5.00 ! restoring salinity for GD 88 time_G = 1.728e+6 ! restoring time for GD 89 sal_F = 2.00 ! restoring salinity for flushing 90 time_F = 8.640e+5 ! restoring time for flushing 91 s_i_max = 20.0 ! Maximum salinity 92 s_i_min = 0.1 ! Minimum tolerated ice salinity 93 s_i_0 = 3.5 ! 1st salinity for salinity profile 94 s_i_1 = 4.5 ! 2nd salinity for salinity profile 73 !------------------------------------------------------------------------------ 74 &namicethd ! Ice thermodynamics 75 !------------------------------------------------------------------------------ 76 rn_hnewice = 0.1 ! thickness for new ice formation in open water (m) 77 ln_frazil = .false. ! use frazil ice collection thickness as a function of wind (T) or not (F) 78 rn_maxfrazb = 0.0 ! maximum fraction of frazil ice collecting at the ice base 79 rn_vfrazb = 0.417 ! thresold drift speed for frazil ice collecting at the ice bottom (m/s) 80 rn_Cfrazb = 5.0 ! squeezing coefficient for frazil ice collecting at the ice bottom 81 rn_himin = 0.10 ! minimum ice thickness (m) used in remapping, must be smaller than rn_hnewice 82 rn_betas = 0.66 ! exponent in lead-ice repratition of snow precipitation 83 ! betas = 1 -> equipartition, betas < 1 -> more on leads 84 rn_kappa_i = 1.0 ! radiation attenuation coefficient in sea ice (m-1) 85 nn_conv_dif = 50 ! maximal number of iterations for heat diffusion computation 86 rn_terr_dif = 0.0001 ! maximum temperature after heat diffusion (degC) 87 nn_ice_thcon= 1 ! sea ice thermal conductivity 88 ! 0: k = k0 + beta.S/T (Untersteiner, 1964) 89 ! 1: k = k0 + beta1.S/T - beta2.T (Pringle et al., 2007) 90 nn_monocat = 0 ! virtual ITD mono-category parameterizations (1, jpl = 1 only) or not (0) 91 ! 2: simple piling instead of ridging --- temporary option 92 ! 3: activate G(he) only --- temporary option 93 ! 4: activate lateral melting only --- temporary option 95 94 / 96 !----------------------------------------------------------------------- 97 &namiceitdme ! parameters for mechanical redistribution of ice 98 !----------------------------------------------------------------------- 99 ridge_scheme_swi = 0 ! which ridging scheme using (1=Rothrock,else=Hibler79) 100 Cs = 0.50 ! shearing energy contribution to ridging 101 Cf = 17.0 ! ratio of ridging work to PE change in ridging 102 fsnowrdg = 0.5 ! snow fraction that survives in ridging 103 fsnowrft = 0.5 ! snow fraction that survives in rafting 104 Gstar = 0.15 ! fractional area of thin ice being ridged 105 astar = 0.05 ! equivalent of gstar (0.05 for TH75 and 0.03 for weaker ice) 106 Hstar = 100.0 ! parameter determining the maximum thickness of ridged ice 107 raft_swi = 1 ! rafting or not 108 hparmeter = 0.75 ! threshold thickness for rafting or not 109 Craft = 5.0 ! coefficient used in the rafting function 110 ridge_por = 0.3 ! initial porosity of the ridged ice (typically 0.30) 111 partfun_swi = 1 ! participation function linear, TH75 (0) or exponential Letal07 (1) 112 brinstren_swi = 0 ! (1) use brine volume to diminish ice strength 95 !------------------------------------------------------------------------------ 96 &namicesal ! Ice salinity 97 !------------------------------------------------------------------------------ 98 nn_icesal = 2 ! ice salinity option 99 ! 1: constant ice salinity (S=rn_icesal) 100 ! 2: varying salinity parameterization S(z,t) 101 ! 3: prescribed salinity profile S(z), Schwarzacher, 1959 102 rn_icesal = 4. ! ice salinity (g/kg, nn_icesal = 1 only) 103 rn_sal_gd = 5. ! restoring ice salinity, gravity drainage (g/kg) 104 rn_time_gd = 1.73e+6 ! restoring time scale, gravity drainage (s) 105 rn_sal_fl = 2. ! restoring ice salinity, flushing (g/kg) 106 rn_time_fl = 8.64e+5 ! restoring time scale, flushing (s) 107 rn_simax = 20. ! maximum tolerated ice salinity (g/kg) 108 rn_simin = 0.1 ! minimum tolerated ice salinity (g/kg) 113 109 / 114 !----------------------------------------------------------------------- 115 &namicedia ! ice diagnostics 116 !----------------------------------------------------------------------- 117 fmtinf ='1PE13.5 ' ! format of the output values 118 nfrinf = 4 ! number of variables written in one line 119 ntmoy = 1 ! instantaneous values of ice evolution or averaging 120 ninfo = 1 ! frequency of ouputs on file ice_evolu in case of averaging 110 !------------------------------------------------------------------------------ 111 &namiceitdme ! Ice mechanical redistribution (ridging and rafting) 112 !------------------------------------------------------------------------------ 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 ln_rafting = .true. ! rafting activated (T) or not (F) 123 rn_hraft = 0.75 ! threshold thickness for rafting (m) 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) 121 126 / 122 !!-----------------------------------------------------------------------123 !&namicehsb ! Heat and salt budgets124 !!-----------------------------------------------------------------------125 !/126
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