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namelist_ice_ref in branches/2016/dev_CNRS_2016/NEMOGCM/CONFIG/ORCA2_LIM3_PISCES/EXP00 – NEMO

source: branches/2016/dev_CNRS_2016/NEMOGCM/CONFIG/ORCA2_LIM3_PISCES/EXP00/namelist_ice_ref @ 7283

Last change on this file since 7283 was 7283, checked in by flavoni, 7 years ago

add default ORCA2_LIM3_PISCES, & remove old useless config

File size: 10.2 KB
Line 
1!!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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)
10!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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)
18   cn_icerst_in  = "restart_ice"   !  suffix of ice restart name (input)
19   cn_icerst_indir = "."           !  directory from which to read input ice restarts
20   cn_icerst_out = "restart_ice"   !  suffix of ice restart name (output)
21   cn_icerst_outdir = "."          !  directory in which to write output ice restarts
22   ln_limdyn     = .true.          !  ice dynamics (T) or thermodynamics only (F)
23   rn_amax_n     = 0.999           !  maximum tolerated ice concentration NH
24   rn_amax_s     = 0.999           !  maximum tolerated ice concentration SH
25   ln_limdiahsb  = .false.         !  check the heat and salt budgets (T) or not (F)
26   ln_limdiaout  = .true.          !  output the heat and salt budgets (T) or not (F)
27   ln_icectl     = .false.         !  ice points output for debug (T or F)
28   iiceprt       = 10              !  i-index for debug
29   jiceprt       = 10              !  j-index for debug
30/
31!------------------------------------------------------------------------------
32&namiceini     !   Ice initialization
33!------------------------------------------------------------------------------
34   ln_iceini      = .true.         !  activate ice initialization (T) or not (F)
35   rn_thres_sst   =  2.0           !  maximum water temperature with initial ice (degC)
36   rn_hts_ini_n   =  0.3           !  initial real snow thickness (m), North
37   rn_hts_ini_s   =  0.3           !        "            "             South
38   rn_hti_ini_n   =  3.0           !  initial real ice thickness  (m), North
39   rn_hti_ini_s   =  1.0           !        "            "             South
40   rn_ati_ini_n   =  0.9           !  initial ice concentration   (-), North
41   rn_ati_ini_s   =  0.9           !        "            "             South
42   rn_smi_ini_n   =  6.3           !  initial ice salinity     (g/kg), North
43   rn_smi_ini_s   =  6.3           !        "            "             South
44   rn_tmi_ini_n   =  270.          !  initial ice/snw temperature (K), North
45   rn_tmi_ini_s   =  270.          !        "            "             South
46/
47!------------------------------------------------------------------------------
48&namiceitd     !   Ice discretization
49!------------------------------------------------------------------------------
50   nn_catbnd      =    2           !  computation of ice category boundaries based on
51                                   !      1: tanh function
52                                   !      2: h^(-alpha), function of rn_himean
53   rn_himean      =    2.0         !  expected domain-average ice thickness (m), nn_catbnd = 2 only
54/
55!------------------------------------------------------------------------------
56&namicedyn     !   Ice dynamics and transport
57!------------------------------------------------------------------------------
58   nn_icestr      =    0           !  ice strength parameteriztaion                     
59                                   !     0: Hibler_79     P = pstar*<h>*exp(-c_rhg*A)
60                                   !     1: Rothrock_75   P = Cf*coeff*integral(wr.h^2)   
61   ln_icestr_bvf  =    .false.     !  ice strength function brine volume (T) or not (F)     
62   rn_pe_rdg      =   17.0         !  ridging work divided by pot. energy change in ridging, if nn_icestr = 1
63   rn_pstar       =    2.0e+04     !  ice strength thickness parameter (N/m2), nn_icestr = 0
64   rn_crhg        =   20.0         !  ice strength conc. parameter (-), nn_icestr = 0       
65   rn_cio         =    5.0e-03     !  ice-ocean drag coefficient           (-)             
66   rn_creepl      =    1.0e-12     !  creep limit (s-1)                                   
67   rn_ecc         =    2.0         !  eccentricity of the elliptical yield curve         
68   nn_nevp        =  120           !  number of EVP subcycles                             
69   rn_relast      =    0.333       !  ratio of elastic timescale to ice time step: Telast = dt_ice * rn_relast
70                                   !     advised value: 1/3 (rn_nevp=120) or 1/9 (rn_nevp=300)
71   nn_ahi0        =    2           !  horizontal diffusivity computation
72                                   !     0: use rn_ahi0_ref
73                                   !     1: use rn_ahi0_ref x mean grid cell length / ( 2deg mean grid cell length )
74                                   !     2: use rn_ahi0_ref x grid cell length      / ( 2deg mean grid cell length )
75   rn_ahi0_ref    = 350.0          !  horizontal sea ice diffusivity (m2/s)
76                                   !     if nn_ahi0 > 0, rn_ahi0_ref is the reference value at a nominal 2 deg resolution
77/
78!------------------------------------------------------------------------------
79&namicehdf     !   Ice horizontal diffusion
80!------------------------------------------------------------------------------
81   nn_convfrq     = 5              !  convergence check frequency of the Crant-Nicholson scheme (perf. optimization)
82/
83!------------------------------------------------------------------------------
84&namicethd     !   Ice thermodynamics
85!------------------------------------------------------------------------------
86   rn_hnewice  = 0.1               !  thickness for new ice formation in open water (m)
87   ln_frazil   = .false.           !  use frazil ice collection thickness as a function of wind (T) or not (F)
88   rn_maxfrazb = 1.0               !  maximum fraction of frazil ice collecting at the ice base
89   rn_vfrazb   = 0.417             !  thresold drift speed for frazil ice collecting at the ice bottom (m/s)
90   rn_Cfrazb   = 5.0               !  squeezing coefficient for frazil ice collecting at the ice bottom
91   rn_himin    = 0.10              !  minimum ice thickness (m) used in remapping, must be smaller than rn_hnewice
92   rn_betas    = 0.66              !  exponent in lead-ice repratition of snow precipitation
93                                   !     betas = 1 -> equipartition, betas < 1 -> more on leads
94   rn_kappa_i  = 1.0               !  radiation attenuation coefficient in sea ice (m-1)
95   nn_conv_dif = 50                !  maximal number of iterations for heat diffusion computation
96   rn_terr_dif = 0.0001            !  maximum temperature after heat diffusion (degC)
97   nn_ice_thcon= 1                 !  sea ice thermal conductivity
98                                   !     0: k = k0 + beta.S/T (Untersteiner, 1964)
99                                   !     1: k = k0 + beta1.S/T - beta2.T (Pringle et al., 2007)
100   nn_monocat  = 0                 !  virtual ITD mono-category parameterizations (1, jpl = 1 only) or not (0)
101                                   !     2: simple piling instead of ridging --- temporary option
102                                   !     3: activate G(he) only              --- temporary option
103                                   !     4: activate lateral melting only    --- temporary option
104  ln_it_qnsice = .true.            !  iterate the surface non-solar flux with surface temperature (T) or not (F)
105/
106!------------------------------------------------------------------------------
107&namicesal     !   Ice salinity
108!------------------------------------------------------------------------------
109   nn_icesal   =  2                !  ice salinity option
110                                   !     1: constant ice salinity (S=rn_icesal)
111                                   !     2: varying salinity parameterization S(z,t)
112                                   !     3: prescribed salinity profile S(z), Schwarzacher, 1959
113   rn_icesal   =  4.               !  ice salinity (g/kg, nn_icesal = 1 only)
114   rn_sal_gd   =  5.               !  restoring ice salinity, gravity drainage (g/kg)
115   rn_time_gd  =  1.73e+6          !  restoring time scale, gravity drainage  (s)
116   rn_sal_fl   =  2.               !  restoring ice salinity, flushing (g/kg)
117   rn_time_fl  =  8.64e+5          !  restoring time scale, flushing (s)
118   rn_simax    = 20.               !  maximum tolerated ice salinity (g/kg)
119   rn_simin    =  0.1              !  minimum tolerated ice salinity (g/kg)
120/
121!------------------------------------------------------------------------------
122&namiceitdme   !   Ice mechanical redistribution (ridging and rafting)
123!------------------------------------------------------------------------------
124   rn_Cs       =   0.5             !  fraction of shearing energy contributing to ridging
125   rn_fsnowrdg =   0.5             !  snow volume fraction that survives in ridging
126   rn_fsnowrft =   0.5             !  snow volume fraction that survives in rafting
127   nn_partfun  =   1               !  type of ridging participation function
128                                   !     0: linear (Thorndike et al, 1975)
129                                   !     1: exponential (Lipscomb, 2007
130   rn_gstar    =   0.15            !  fractional area of thin ice being ridged (nn_partfun = 0)
131   rn_astar    =   0.05            !  exponential measure of ridging ice fraction (nn_partfun = 1)
132   rn_hstar    = 100.0             !  determines the maximum thickness of ridged ice (m) (Hibler, 1980)
133   ln_rafting  =   .true.          !  rafting activated (T) or not (F)
134   rn_hraft    =   0.75            !  threshold thickness for rafting (m)
135   rn_craft    =   5.0             !  squeezing coefficient used in the rafting function
136   rn_por_rdg  =   0.3             !  porosity of newly ridged ice (Lepparanta et al., 1995)
137/
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