1 | # |
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2 | # icephys.param - ISPOL |
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3 | # |
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4 | # Parameter file for sea ice physics, source v2.42 |
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5 | # |
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6 | # (c) Martin Vancoppenolle, Oct 2011, Louvain-la-Neuve, Belgium |
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7 | # |
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8 | #================================================================================================== |
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9 | # |
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10 | #-------------------------------------------------------------------------------------------------- |
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11 | # General parameters |
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12 | #-------------------------------------------------------------------------------------------------- |
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13 | # |
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14 | # nlay_i ! number of layers in the ice |
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15 | 10 |
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16 | # nlay_s ! number of layers in the snow |
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17 | 1 |
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18 | # parsub ! switch for snow sublimation or not ! should not be used anymore |
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19 | 0.0 |
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20 | # ln_evap ! switch for snow summer evaporation or not |
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21 | .TRUE. |
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22 | # tbq_ano ! prescribed air temperature anomaly (K) |
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23 | 0.0 |
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24 | # |
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25 | #-------------------------------------------------------------------------------------------------- |
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26 | # Ice desalination |
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27 | #-------------------------------------------------------------------------------------------------- |
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28 | # |
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29 | # ln_grd ! gravity drainage or not |
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30 | .TRUE. |
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31 | # ln_flu ! flushing or not |
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32 | .TRUE. |
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33 | # ln_flo ! flooding or not |
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34 | .TRUE. |
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35 | # flu_beta ! fraction of meltwater percolating in summer |
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36 | 0.3 |
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37 | # e_thr_flu ! permeability threshold for flushing |
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38 | 0.05 |
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39 | # frtr_si_phy ! fraction of salt trapped in snow-ice |
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40 | 1.0 |
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41 | # d_br_mol ! molecular diffusivity of brine (def:1.0e-9, obs: 6.8e-10) |
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42 | 6.8e-10 |
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43 | # d_br_tur ! turbulent diffusivity of brine (def: 1.0e-6) 3.0e-7 1.0e-7 |
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44 | 5.0e-7 |
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45 | # ra_c ! critical rayleigh number for brine convection (def: 5, obs: 10) |
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46 | 7 |
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47 | # ra_smooth ! hyperbolic tangent coefficient for turbulent diffusivity (def:1) |
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48 | 0.6 |
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49 | # gravdr ! type of gravity drainage 'CW' for Cox Weeks 88 or 'RA' for Rayleigh-number based |
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50 | RA |
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51 | # delta_cw ! CW88 grav. drainage eff.(1.68e-7 for CW88 or 0.588e-7 for V08 value) |
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52 | 1.68e-7 |
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53 | # |
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54 | #-------------------------------------------------------------------------------------------------- |
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55 | # Radiative transfer (SSL = surface scattering layer) |
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56 | #-------------------------------------------------------------------------------------------------- |
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57 | # |
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58 | # emig ! Surface emissivity (past 0.995) |
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59 | 0.995 |
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60 | # fpar_fsw ! Visible energetic ratio (Fpar/Fsw, J/J) = 0.475 (Frouin Pinker 95) |
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61 | 0.475 |
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62 | # qpar_fsw ! Quantum energetic ratio (Qpar/Fsw, µE/J) = 2.33 (Vancoppenollet al 2011) |
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63 | 2.33 |
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64 | # c_rad_scheme ! use surface transmission parameter ('INOT'), use SSL extinction coefficients ('EXTC') |
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65 | INOT |
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66 | # c_rad_discr ! discretization of radiation based on absorption ('ABS') or on transmission ('TRA') |
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67 | TRA |
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68 | # rad_inot_s_dry ! surface transmission parameter, dry snow, visible range (INOT ONLY) ! 0.22 |
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69 | 0.22 |
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70 | # rad_inot_s_wet ! surface transmission parameter, wet snow, visible range (INOT ONLY) ! 0.22 |
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71 | 0.22 |
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72 | # rad_inot_i_dry ! surface transmission parameter, dry ice, visible range (INOT only). |
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73 | 0.58 |
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74 | # rad_inot_i_wet ! surface transmission parameter, wet ice, visible range (INOT only). |
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75 | 0.96 |
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76 | # h_not_s ! SSL thickness, snow (Perovich 07 0.03 m) |
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77 | 0.03 |
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78 | # h_not_i ! SSL thicknes, sea ice (Grenfell Maykut 0.1 m) |
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79 | 0.10 |
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80 | # rad_kappa_s_su_d ! surface extinction coefficient, dry snow (Jarvinen 73 m-1, Pogson 63.2373) (EXTC only) |
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81 | 63.2373 |
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82 | # rad_kappa_s_su_m ! surface extinction coefficient, melting snow (Jarvinen 51 m-1) (EXTC only) |
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83 | 63.2373 |
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84 | # rad_kappa_i_su_d ! surface extinction coefficient, cold ice (io = 0.30 for 10 cm -> 12.03 m-1) (EXTC only) |
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85 | 12.03 |
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86 | # rad_kappa_i_su_m ! surface extinction coefficient, melting ice (EXTC only) |
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87 | 12.03 |
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88 | # rad_kappa_s_de_d ! depth extinction coefficient in dry snow (Jarvinen 24 m-1, Pogson 14, Nicolaus-analysis 7.33) |
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89 | 7.33 |
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90 | # rad_kappa_s_de_m ! depth extinction coefficient in melting snow (Jarvinen 7.8 m-1, Pogson 7.5, Perovich 24.28) |
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91 | 7.33 |
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92 | # rad_kappa_i_de_d ! attenuation coefficient in cold ice (Light et al., 2008 0.8 for visible radiation, Pogson 1.2, Nicolaus analysis, 0.4) |
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93 | 0.6 |
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94 | # rad_kappa_i_de_m ! attenuation coefficient in melting ice (Light et al., 2008 0.8 for visible radiation Pogson 0.8) |
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95 | 0.6 |
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96 | # |
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