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# icephys.param - ISPOL
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# Parameter file for sea ice physics, source v2.42
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# (c) Martin Vancoppenolle, Oct 2011, Louvain-la-Neuve, Belgium
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#==================================================================================================
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#--------------------------------------------------------------------------------------------------
# General parameters
#--------------------------------------------------------------------------------------------------
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# nlay_i        ! number of layers in the ice
10
# nlay_s        ! number of layers in the snow
1
# parsub	! switch for snow sublimation or not ! should not be used anymore
0.0
# ln_evap       ! switch for snow summer evaporation or not
.TRUE.
# tbq_ano       ! prescribed air temperature anomaly (K)
0.0
#
#--------------------------------------------------------------------------------------------------
# Ice desalination
#--------------------------------------------------------------------------------------------------
#
# ln_grd        ! gravity drainage or not
.TRUE.
# ln_flu        ! flushing or not
.TRUE.
# ln_flo        ! flooding or not
.TRUE.
# flu_beta      ! fraction of meltwater percolating in summer
0.3
# e_thr_flu     ! permeability threshold for flushing
0.05
# frtr_si_phy   ! fraction of salt trapped in snow-ice
1.0
# d_br_mol      ! molecular diffusivity of brine (def:1.0e-9, obs: 6.8e-10)
6.8e-10
# d_br_tur      ! turbulent diffusivity of brine (def: 1.0e-6) 3.0e-7 1.0e-7
5.0e-7
# ra_c          ! critical rayleigh number for brine convection (def: 5, obs: 10)
7
# ra_smooth     ! hyperbolic tangent coefficient for turbulent diffusivity (def:1)
0.6
# c_gravdr      ! gravity drainage: 'CW' = Cox Weeks 1988; 'DI' for eddy diffusive (Vetal10) or 'AD' for Advection-based (new)
AD
# c_sbr         ! computation of brine salinity for salt transport: linear ('LIN'), Weast 71 (WEA), Notz 05 (NTZ)
LIN
# c_perm        ! permeability of Freitag ('FRE') or Rees Jones and Worster ('RJW')
FRE
# c_permeff     ! form of effective permeability : minimum ('MIN') or harmonic mean ('HAR')
MIN
# delta_cw      ! CW88 grav. drainage eff.(1.68e-7 for CW88 or 0.588e-7 for V08 value)
1.68e-7
#
#--------------------------------------------------------------------------------------------------
# Radiative transfer (SSL = surface scattering layer)
#--------------------------------------------------------------------------------------------------
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# emig          ! Surface emissivity (past 0.995)
0.995
# fpar_fsw      ! Visible energetic ratio (Fpar/Fsw, J/J) = 0.475 (Frouin Pinker 95)
0.475
# qpar_fsw      ! Quantum energetic ratio (Qpar/Fsw, µE/J) = 2.33 (Vancoppenollet al 2011)
2.33
# c_rad_scheme  ! use surface transmission parameter ('INOT'), use SSL extinction coefficients ('EXTC')
INOT
# c_rad_discr   ! discretization of radiation based on absorption ('ABS') or on transmission ('TRA')
TRA
# rad_inot_s_dry ! surface transmission parameter, dry snow, visible range (INOT ONLY) ! 0.22
0.22
# rad_inot_s_wet ! surface transmission parameter, wet snow, visible range (INOT ONLY) ! 0.22
0.22
# rad_inot_i_dry ! surface transmission parameter, dry ice, visible range (INOT only). 
0.58
# rad_inot_i_wet ! surface transmission parameter, wet ice, visible range (INOT only). 
0.96
# h_not_s       ! SSL thickness, snow (Perovich 07 0.03 m)
0.03
# h_not_i       ! SSL thicknes, sea ice (Grenfell Maykut 0.1 m)
0.10
# rad_kappa_s_su_d ! surface extinction coefficient, dry snow (Jarvinen 73 m-1, Pogson 63.2373)  (EXTC only)
63.2373
# rad_kappa_s_su_m ! surface extinction coefficient, melting snow (Jarvinen 51 m-1)              (EXTC only)
63.2373
# rad_kappa_i_su_d ! surface extinction coefficient, cold ice (io = 0.30 for 10 cm -> 12.03 m-1) (EXTC only)
12.03
# rad_kappa_i_su_m ! surface extinction coefficient, melting ice                                 (EXTC only)
12.03
# rad_kappa_s_de_d ! depth extinction coefficient in dry snow (Jarvinen 24 m-1, Pogson 14, Nicolaus-analysis 7.33)
7.33
# rad_kappa_s_de_m ! depth extinction coefficient in melting snow (Jarvinen 7.8 m-1, Pogson 7.5, Perovich 24.28)
7.33 
# 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)
0.6
# rad_kappa_i_de_m ! attenuation coefficient in melting ice (Light et al., 2008 0.8 for visible radiation Pogson 0.8)
0.6
#