| [8426] | 1 | MODULE icealb |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE icealb *** |
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| 4 | !! Ocean forcing: bulk thermohaline forcing of the ice |
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| 5 | !!===================================================================== |
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| [8486] | 6 | !! History : 4.0 ! 2017-07 (C. Rousset) Split ice and ocean albedos |
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| [8426] | 7 | !!---------------------------------------------------------------------- |
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| 8 | #if defined key_lim3 |
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| 9 | !!---------------------------------------------------------------------- |
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| [8486] | 10 | !! 'key_lim3' LIM 3.0 sea-ice model |
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| [8426] | 11 | !!---------------------------------------------------------------------- |
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| [8486] | 12 | !! ice_alb : albedo for ice (clear and overcast skies) |
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| 13 | !! alb_init : initialisation of albedo computation |
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| 14 | !!---------------------------------------------------------------------- |
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| [8505] | 15 | USE ice, ONLY: jpl ! sea-ice: number of categories |
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| [8426] | 16 | USE phycst ! physical constants |
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| 17 | ! |
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| 18 | USE in_out_manager ! I/O manager |
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| 19 | USE lib_mpp ! MPP library |
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| 20 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| 21 | |
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| 22 | IMPLICIT NONE |
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| 23 | PRIVATE |
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| 24 | |
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| [8505] | 25 | PUBLIC ice_alb_init ! called in icestp |
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| 26 | PUBLIC ice_alb ! called in iceforcing.F90 and iceupdate.F90 |
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| [8426] | 27 | |
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| [8486] | 28 | REAL(wp), PUBLIC, PARAMETER :: rn_alb_oce = 0.066 !: ocean or lead albedo (Pegau and Paulson, Ann. Glac. 2001) |
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| 29 | |
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| [8498] | 30 | REAL(wp) , PARAMETER :: rc1 = 0.05 ! snow thickness (only for nn_ice_alb=0) |
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| 31 | REAL(wp) , PARAMETER :: rc2 = 0.10 ! " " |
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| 32 | REAL(wp) , PARAMETER :: rcloud = 0.06 ! cloud effect on albedo (only-for nn_ice_alb=0) |
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| 33 | REAL(wp) , PARAMETER :: r1_c1 = 1. / rc1 |
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| 34 | REAL(wp) , PARAMETER :: r1_c2 = 1. / rc2 |
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| [8505] | 35 | ! |
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| [8512] | 36 | ! ** albedo namelist (namice_alb) |
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| [8505] | 37 | INTEGER :: nn_ice_alb ! type of albedo scheme: 0: Shine & Henderson-Sellers (JGR 1985) |
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| 38 | ! ! 1: "home made" based on Brandt et al. (JClim 2005) |
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| 39 | ! ! and Grenfell & Perovich (JGR 2004) |
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| 40 | ! ! 2: Same as 1 but with melt ponds |
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| 41 | REAL(wp) :: rn_alb_sdry ! dry snow albedo |
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| 42 | REAL(wp) :: rn_alb_smlt ! melting snow albedo |
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| 43 | REAL(wp) :: rn_alb_idry ! dry ice albedo |
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| 44 | REAL(wp) :: rn_alb_imlt ! bare puddled ice albedo |
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| 45 | REAL(wp) :: rn_alb_dpnd ! ponded ice albedo |
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| [8426] | 46 | |
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| 47 | !!---------------------------------------------------------------------- |
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| [8486] | 48 | !! NEMO/ICE 4.0 , NEMO Consortium (2017) |
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| [8426] | 49 | !! $Id: icealb.F90 8268 2017-07-03 15:01:04Z clem $ |
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| 50 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 51 | !!---------------------------------------------------------------------- |
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| 52 | CONTAINS |
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| 53 | |
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| 54 | SUBROUTINE ice_alb( pt_ice, ph_ice, ph_snw, pafrac_pnd, ph_pnd, ld_pnd, pa_ice_cs, pa_ice_os ) |
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| 55 | !!---------------------------------------------------------------------- |
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| 56 | !! *** ROUTINE ice_alb *** |
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| 57 | !! |
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| 58 | !! ** Purpose : Computation of the albedo of the snow/ice system |
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| 59 | !! |
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| 60 | !! ** Method : Two schemes are available (from namelist parameter nn_ice_alb) |
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| 61 | !! 0: the scheme is that of Shine & Henderson-Sellers (JGR 1985) for clear-skies |
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| 62 | !! 1: the scheme is "home made" (for cloudy skies) and based on Brandt et al. (J. Climate 2005) |
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| 63 | !! and Grenfell & Perovich (JGR 2004) |
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| 64 | !! 2: fractional surface-based formulation of scheme 1 (NEW) |
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| 65 | !! Description of scheme 1: |
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| 66 | !! 1) Albedo dependency on ice thickness follows the findings from Brandt et al (2005) |
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| 67 | !! which are an update of Allison et al. (JGR 1993) ; Brandt et al. 1999 |
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| 68 | !! 0-5cm : linear function of ice thickness |
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| 69 | !! 5-150cm: log function of ice thickness |
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| 70 | !! > 150cm: constant |
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| 71 | !! 2) Albedo dependency on snow thickness follows the findings from Grenfell & Perovich (2004) |
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| 72 | !! i.e. it increases as -EXP(-snw_thick/0.02) during freezing and -EXP(-snw_thick/0.03) during melting |
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| 73 | !! 3) Albedo dependency on clouds is speculated from measurements of Grenfell and Perovich (2004) |
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| 74 | !! i.e. cloudy-clear albedo depend on cloudy albedo following a 2d order polynomial law |
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| 75 | !! 4) The needed 4 parameters are: dry and melting snow, freezing ice and bare puddled ice |
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| 76 | !! |
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| 77 | !! ** Note : The parameterization from Shine & Henderson-Sellers presents several misconstructions: |
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| 78 | !! 1) ice albedo when ice thick. tends to 0 is different than ocean albedo |
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| 79 | !! 2) for small ice thick. covered with some snow (<3cm?), albedo is larger |
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| 80 | !! under melting conditions than under freezing conditions |
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| 81 | !! 3) the evolution of ice albedo as a function of ice thickness shows |
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| 82 | !! 3 sharp inflexion points (at 5cm, 100cm and 150cm) that look highly unrealistic |
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| 83 | !! |
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| 84 | !! References : Shine & Henderson-Sellers 1985, JGR, 90(D1), 2243-2250. |
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| 85 | !! Brandt et al. 2005, J. Climate, vol 18 |
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| 86 | !! Grenfell & Perovich 2004, JGR, vol 109 |
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| 87 | !!---------------------------------------------------------------------- |
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| [8486] | 88 | REAL(wp), INTENT(in ), DIMENSION(:,:,:) :: pt_ice ! ice surface temperature (Kelvin) |
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| 89 | REAL(wp), INTENT(in ), DIMENSION(:,:,:) :: ph_ice ! sea-ice thickness |
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| 90 | REAL(wp), INTENT(in ), DIMENSION(:,:,:) :: ph_snw ! snow depth |
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| 91 | REAL(wp), INTENT(in ), DIMENSION(:,:,:) :: pafrac_pnd ! melt pond relative fraction (per unit ice area) |
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| 92 | REAL(wp), INTENT(in ), DIMENSION(:,:,:) :: ph_pnd ! melt pond depth |
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| 93 | LOGICAL , INTENT(in ) :: ld_pnd ! melt ponds radiatively active or not |
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| 94 | REAL(wp), INTENT( out), DIMENSION(:,:,:) :: pa_ice_cs ! albedo of ice under clear sky |
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| 95 | REAL(wp), INTENT( out), DIMENSION(:,:,:) :: pa_ice_os ! albedo of ice under overcast sky |
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| [8426] | 96 | ! |
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| [8486] | 97 | INTEGER :: ji, jj, jl ! dummy loop indices |
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| 98 | REAL(wp) :: zswitch, z1_c1, z1_c2 ! local scalar |
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| 99 | REAL(wp) :: z1_href_pnd ! - - |
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| [8426] | 100 | REAL(wp) :: zalb_sm, zalb_sf, zalb_st ! albedo of snow melting, freezing, total |
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| 101 | ! |
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| [8486] | 102 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zalb, zalb_it ! intermediate variable & albedo of ice (snow free) |
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| [8426] | 103 | !! MV MP |
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| [8486] | 104 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zalb_pnd ! ponded sea ice albedo |
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| 105 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zalb_ice ! bare sea ice albedo |
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| 106 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zalb_snw ! snow-covered sea ice albedo |
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| 107 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zafrac_snw ! relative snow fraction |
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| 108 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zafrac_ice ! relative ice fraction |
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| 109 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zafrac_pnd ! relative ice fraction (effective) |
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| [8426] | 110 | !!--------------------------------------------------------------------- |
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| 111 | |
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| 112 | !----------------------------------------------------- |
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| 113 | ! Snow-free albedo (no ice thickness dependence yet) |
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| 114 | !----------------------------------------------------- |
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| 115 | ! |
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| 116 | ! Part common to nn_ice_alb = 0, 1, 2 |
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| 117 | ! |
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| 118 | IF ( .NOT. ld_pnd ) THEN !--- No melt ponds OR radiatively inactive melt ponds |
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| 119 | ! Bare ice albedo is prescribed, with implicit assumption on pond fraction and depth |
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| [8498] | 120 | WHERE ( ph_snw == 0._wp .AND. pt_ice >= rt0 ) ; zalb(:,:,:) = rn_alb_imlt |
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| 121 | ELSEWHERE ; zalb(:,:,:) = rn_alb_idry |
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| 122 | END WHERE |
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| [8426] | 123 | ENDIF |
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| 124 | |
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| [8486] | 125 | SELECT CASE ( nn_ice_alb ) ! select a parameterization |
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| 126 | ! |
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| 127 | ! !------------------------------------------ |
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| 128 | CASE( 0 ) ! Shine and Henderson-Sellers (1985) ! (based on clear sky values) |
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| 129 | ! !------------------------------------------ |
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| 130 | ! |
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| 131 | ! ! Thickness-dependent bare ice albedo |
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| [8498] | 132 | WHERE ( 1.5 < ph_ice ) ; zalb_it = zalb |
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| 133 | ELSEWHERE( 1.0 < ph_ice .AND. ph_ice <= 1.5 ) ; zalb_it = 0.472 + 2.0 * ( zalb - 0.472 ) * ( ph_ice - 1.0 ) |
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| 134 | ELSEWHERE( 0.05 < ph_ice .AND. ph_ice <= 1.0 ) ; zalb_it = 0.2467 + 0.7049 * ph_ice & |
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| 135 | & - 0.8608 * ph_ice * ph_ice & |
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| 136 | & + 0.3812 * ph_ice * ph_ice * ph_ice |
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| 137 | ELSEWHERE ; zalb_it = 0.1 + 3.6 * ph_ice |
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| [8426] | 138 | END WHERE |
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| [8486] | 139 | ! |
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| 140 | IF ( ld_pnd ) THEN ! Depth-dependent ponded ice albedo |
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| 141 | z1_href_pnd = 1. / 0.05 ! inverse of the characteristic length scale (Lecomte et al. 2015) |
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| 142 | zalb_pnd = rn_alb_dpnd - ( rn_alb_dpnd - zalb_it ) * EXP( - ph_pnd * z1_href_pnd ) |
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| 143 | ! ! Snow-free ice albedo is a function of pond fraction |
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| [8498] | 144 | WHERE ( ph_snw == 0._wp .AND. pt_ice >= rt0 ) |
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| [8486] | 145 | zalb_it = zalb_it * ( 1. - pafrac_pnd ) + zalb_pnd * pafrac_pnd |
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| 146 | END WHERE |
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| [8426] | 147 | ENDIF |
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| [8486] | 148 | ! |
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| 149 | !!gm: optimization ( rn_alb_smlt - rn_alb_imlt ) * r1_c2 can be computed one for all |
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| 150 | !!gm before the DO-loop below |
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| [8426] | 151 | DO jl = 1, jpl |
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| 152 | DO jj = 1, jpj |
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| 153 | DO ji = 1, jpi |
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| [8486] | 154 | ! ! Freezing snow |
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| [8498] | 155 | ! no effect of underlying ice layer IF snow thickness > c1. Albedo does not depend on snow thick if > rc2 |
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| 156 | zswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp , - ( ph_snw(ji,jj,jl) - rc1 ) ) ) |
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| [8486] | 157 | zalb_sf = ( 1._wp - zswitch ) * ( zalb_it(ji,jj,jl) & |
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| 158 | & + ph_snw(ji,jj,jl) * ( rn_alb_sdry - zalb_it(ji,jj,jl) ) * r1_c1 ) & |
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| 159 | & + zswitch * rn_alb_sdry |
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| 160 | ! |
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| 161 | ! ! Melting snow |
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| [8498] | 162 | ! no effect of underlying ice layer. Albedo does not depend on snow thick IF > rc2 |
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| 163 | zswitch = MAX( 0._wp , SIGN( 1._wp , ph_snw(ji,jj,jl) - rc2 ) ) |
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| [8486] | 164 | zalb_sm = ( 1._wp - zswitch ) * ( rn_alb_imlt + ph_snw(ji,jj,jl) * ( rn_alb_smlt - rn_alb_imlt ) * r1_c2 ) & |
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| 165 | & + zswitch * rn_alb_smlt |
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| 166 | ! |
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| 167 | ! ! Snow albedo |
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| 168 | zswitch = MAX( 0._wp , SIGN( 1._wp , pt_ice(ji,jj,jl) - rt0_snow ) ) |
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| 169 | zalb_st = zswitch * zalb_sm + ( 1._wp - zswitch ) * zalb_sf |
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| [8426] | 170 | ! |
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| [8486] | 171 | ! ! Surface albedo |
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| [8426] | 172 | zswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp , - ph_snw(ji,jj,jl) ) ) |
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| 173 | pa_ice_cs(ji,jj,jl) = zswitch * zalb_st + ( 1._wp - zswitch ) * zalb_it(ji,jj,jl) |
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| 174 | ! |
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| 175 | END DO |
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| 176 | END DO |
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| 177 | END DO |
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| [8486] | 178 | ! |
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| [8426] | 179 | pa_ice_os(:,:,:) = pa_ice_cs(:,:,:) + rcloud ! Oberhuber correction for overcast sky |
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| [8486] | 180 | ! |
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| 181 | ! |
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| 182 | ! !------------------------------------------ |
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| 183 | CASE( 1 ) ! New parameterization (2016) ! (based on overcast sky values) |
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| 184 | ! !------------------------------------------ |
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| 185 | ! |
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| 186 | ! compilation of values from literature (reference overcast sky values) |
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| 187 | ! rn_alb_sdry = 0.85 ! dry snow |
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| 188 | ! rn_alb_smlt = 0.75 ! melting snow |
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| 189 | ! rn_alb_idry = 0.60 ! bare frozen ice |
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| 190 | ! rn_alb_dpnd = 0.36 ! ponded-ice overcast albedo (Lecomte et al, 2015) |
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| 191 | ! ! early melt pnds 0.27, late melt ponds 0.14 Grenfell & Perovich |
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| 192 | ! Perovich et al 2002 (Sheba) => the only dataset for which all types of ice/snow were retrieved |
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| 193 | ! rn_alb_sdry = 0.85 ! dry snow |
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| 194 | ! rn_alb_smlt = 0.72 ! melting snow |
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| 195 | ! rn_alb_idry = 0.65 ! bare frozen ice |
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| 196 | ! Brandt et al 2005 (East Antarctica) |
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| 197 | ! rn_alb_sdry = 0.87 ! dry snow |
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| 198 | ! rn_alb_smlt = 0.82 ! melting snow |
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| 199 | ! rn_alb_idry = 0.54 ! bare frozen ice |
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| 200 | ! |
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| 201 | ! !--- Computation of snow-free ice albedo |
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| [8426] | 202 | z1_c1 = 1. / ( LOG(1.5) - LOG(0.05) ) |
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| 203 | z1_c2 = 1. / 0.05 |
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| 204 | |
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| [8486] | 205 | ! !--- Accounting for the ice-thickness dependency |
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| 206 | WHERE ( 1.5 < ph_ice ) ; zalb_it = zalb |
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| 207 | ELSE WHERE( 0.05 < ph_ice .AND. ph_ice <= 1.5 ) ; zalb_it = zalb + ( 0.18 - zalb ) * z1_c1 * ( LOG(1.5) - LOG(ph_ice) ) |
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| 208 | ELSE WHERE ; zalb_it = rn_alb_oce + ( 0.18 - rn_alb_oce ) * z1_c2 * ph_ice |
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| [8426] | 209 | END WHERE |
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| [8486] | 210 | ! |
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| 211 | IF ( ld_pnd ) THEN ! Depth-dependent ponded ice albedo |
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| 212 | z1_href_pnd = 0.05 ! inverse of the characteristic length scale (Lecomte et al. 2015) |
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| 213 | zalb_pnd = rn_alb_dpnd - ( rn_alb_dpnd - zalb_it ) * EXP( - ph_pnd * z1_href_pnd ) |
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| 214 | ! |
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| 215 | ! ! Snow-free ice albedo is weighted mean of ponded ice and bare ice contributions |
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| [8498] | 216 | WHERE ( ph_snw == 0._wp .AND. pt_ice >= rt0 ) |
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| [8486] | 217 | zalb_it = zalb_it * ( 1. - pafrac_pnd ) + zalb_pnd * pafrac_pnd |
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| 218 | END WHERE |
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| [8426] | 219 | ENDIF |
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| [8486] | 220 | ! |
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| 221 | ! !--- Overcast sky surface albedo (accounting for snow, ice melt ponds) |
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| [8426] | 222 | z1_c1 = 1. / 0.02 |
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| 223 | z1_c2 = 1. / 0.03 |
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| 224 | DO jl = 1, jpl |
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| 225 | DO jj = 1, jpj |
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| 226 | DO ji = 1, jpi |
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| 227 | ! Snow depth dependence of snow albedo |
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| 228 | zalb_sf = rn_alb_sdry - ( rn_alb_sdry - zalb_it(ji,jj,jl)) * EXP( - ph_snw(ji,jj,jl) * z1_c1 ); |
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| 229 | zalb_sm = rn_alb_smlt - ( rn_alb_smlt - zalb_it(ji,jj,jl)) * EXP( - ph_snw(ji,jj,jl) * z1_c2 ); |
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| 230 | |
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| 231 | ! Snow albedo (MV I guess we could use rt0 instead of rt0_snow) |
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| 232 | zswitch = MAX( 0._wp , SIGN( 1._wp , pt_ice(ji,jj,jl) - rt0_snow ) ) |
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| 233 | zalb_st = zswitch * zalb_sm + ( 1._wp - zswitch ) * zalb_sf |
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| 234 | |
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| 235 | ! Surface albedo |
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| 236 | zswitch = MAX( 0._wp , SIGN( 1._wp , - ph_snw(ji,jj,jl) ) ) |
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| 237 | pa_ice_os(ji,jj,jl) = ( 1._wp - zswitch ) * zalb_st + zswitch * zalb_it(ji,jj,jl) |
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| 238 | |
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| 239 | END DO |
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| 240 | END DO |
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| 241 | END DO |
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| [8486] | 242 | ! |
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| 243 | ! !--- Clear sky surface albedo |
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| [8426] | 244 | pa_ice_cs = pa_ice_os - ( - 0.1010 * pa_ice_os * pa_ice_os + 0.1933 * pa_ice_os - 0.0148 ); |
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| [8486] | 245 | ! |
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| 246 | ! |
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| 247 | ! !------------------------------------------ |
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| 248 | CASE( 2 ) ! Fractional surface-based parameterization (2017) |
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| 249 | ! !------------------------------------------ |
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| 250 | ! MV: I propose this formulation that is more elegant, and more easy to expand towards |
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| 251 | ! varying pond and snow fraction. |
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| 252 | ! Formulation 1 has issues to handle ponds and snow together that can't easily be fixed. |
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| 253 | ! This one handles it better, I believe. |
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| 254 | ! |
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| 255 | ! !== Snow, bare ice and ponded ice fractions ==! |
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| 256 | ! |
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| 257 | ! ! Specific fractions (zafrac) refer to relative area covered by snow within each ice category |
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| 258 | ! |
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| 259 | ! !--- Effective pond fraction (for now, we prevent melt ponds and snow at the same time) |
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| 260 | zafrac_pnd = 0._wp |
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| [8498] | 261 | IF ( ld_pnd ) THEN |
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| 262 | WHERE( ph_snw == 0._wp ) zafrac_pnd = pafrac_pnd ! Snow fully "shades" melt ponds |
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| [8486] | 263 | ENDIF |
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| 264 | ! |
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| 265 | ! !--- Specific snow fraction (for now, prescribed) |
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| [8498] | 266 | WHERE( ph_snw > 0._wp ) ; zafrac_snw = 1. |
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| 267 | ELSEWHERE ; zafrac_snw = 0. |
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| [8486] | 268 | END WHERE |
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| 269 | ! |
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| 270 | ! !--- Specific ice fraction |
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| 271 | zafrac_ice = 1. - zafrac_snw - zafrac_pnd |
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| 272 | ! |
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| 273 | ! !== Snow-covered, pond-covered, and bare ice albedos ==! |
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| 274 | ! |
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| 275 | ! !--- Bare ice albedo |
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| 276 | z1_c1 = 1. / ( LOG(1.5) - LOG(0.05) ) |
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| 277 | z1_c2 = 1. / 0.05 |
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| [8498] | 278 | WHERE ( 1.5 < ph_ice ) ; zalb_ice = zalb |
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| 279 | ELSEWHERE( 0.05 < ph_ice .AND. ph_ice <= 1.5 ) ; zalb_ice = zalb + ( 0.18 - zalb ) * z1_c1 * & |
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| [8426] | 280 | & ( LOG(1.5) - LOG(ph_ice) ) |
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| [8498] | 281 | ELSEWHERE ; zalb_ice = rn_alb_oce + ( 0.18 - rn_alb_oce ) * z1_c2 * ph_ice |
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| [8486] | 282 | END WHERE |
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| 283 | ! |
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| 284 | z1_c1 = 1. / 0.02 !--- Snow-covered ice albedo (freezing, melting cases) |
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| 285 | z1_c2 = 1. / 0.03 |
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| 286 | ! |
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| [8498] | 287 | WHERE( pt_ice < rt0_snow ) ; zalb_snw = rn_alb_sdry - ( rn_alb_sdry - zalb_ice ) * EXP( - ph_snw * z1_c1 ) |
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| 288 | ELSEWHERE ; zalb_snw = rn_alb_smlt - ( rn_alb_smlt - zalb_ice ) * EXP( - ph_snw * z1_c2 ) |
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| [8486] | 289 | END WHERE |
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| 290 | ! |
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| 291 | IF ( ld_pnd ) THEN !--- Depth-dependent ponded ice albedo |
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| 292 | z1_href_pnd = 0.05 ! inverse of the characteristic length scale (Lecomte et al. 2015) |
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| 293 | zalb_pnd = rn_alb_dpnd - ( rn_alb_dpnd - zalb_ice ) * EXP( - ph_pnd * z1_href_pnd ) |
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| 294 | ELSE |
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| 295 | zalb_pnd = rn_alb_dpnd |
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| 296 | ENDIF |
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| 297 | ! !--- Surface albedo is weighted mean of snow, ponds and bare ice contributions |
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| 298 | pa_ice_os = zafrac_snw * zalb_snw + zafrac_pnd * zalb_pnd + zafrac_ice * zalb_ice |
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| 299 | pa_ice_cs = pa_ice_os - ( - 0.1010 * pa_ice_os * pa_ice_os + 0.1933 * pa_ice_os - 0.0148 ) |
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| [8426] | 300 | |
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| 301 | END SELECT |
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| 302 | ! |
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| 303 | END SUBROUTINE ice_alb |
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| 304 | |
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| [8486] | 305 | |
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| [8505] | 306 | SUBROUTINE ice_alb_init |
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| [8426] | 307 | !!---------------------------------------------------------------------- |
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| 308 | !! *** ROUTINE alb_init *** |
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| 309 | !! |
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| 310 | !! ** Purpose : initializations for the albedo parameters |
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| 311 | !! |
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| [8512] | 312 | !! ** Method : Read the namelist namice_alb |
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| [8426] | 313 | !!---------------------------------------------------------------------- |
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| 314 | INTEGER :: ios ! Local integer output status for namelist read |
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| [8486] | 315 | !! |
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| [8512] | 316 | NAMELIST/namice_alb/ nn_ice_alb, rn_alb_sdry, rn_alb_smlt, rn_alb_idry, rn_alb_imlt, rn_alb_dpnd |
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| [8426] | 317 | !!---------------------------------------------------------------------- |
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| 318 | ! |
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| [8512] | 319 | REWIND( numnam_ice_ref ) ! Namelist namice_alb in reference namelist : Albedo parameters |
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| 320 | READ ( numnam_ice_ref, namice_alb, IOSTAT = ios, ERR = 901) |
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| 321 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namice_alb in reference namelist', lwp ) |
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| [8426] | 322 | |
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| [8517] | 323 | REWIND( numnam_ice_cfg ) ! Namelist namice_alb in configuration namelist : Albedo parameters |
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| [8512] | 324 | READ ( numnam_ice_cfg, namice_alb, IOSTAT = ios, ERR = 902 ) |
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| 325 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namice_alb in configuration namelist', lwp ) |
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| 326 | IF(lwm) WRITE ( numoni, namice_alb ) |
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| [8426] | 327 | ! |
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| 328 | IF(lwp) THEN ! Control print |
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| 329 | WRITE(numout,*) |
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| [8514] | 330 | WRITE(numout,*) 'ice_alb_init: set albedo parameters' |
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| 331 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| [8512] | 332 | WRITE(numout,*) ' Namelist namice_alb : albedo ' |
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| [8426] | 333 | WRITE(numout,*) ' choose the albedo parameterization nn_ice_alb = ', nn_ice_alb |
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| 334 | WRITE(numout,*) ' albedo of dry snow rn_alb_sdry = ', rn_alb_sdry |
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| 335 | WRITE(numout,*) ' albedo of melting snow rn_alb_smlt = ', rn_alb_smlt |
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| 336 | WRITE(numout,*) ' albedo of dry ice rn_alb_idry = ', rn_alb_idry |
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| 337 | WRITE(numout,*) ' albedo of bare puddled ice rn_alb_imlt = ', rn_alb_imlt |
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| 338 | WRITE(numout,*) ' albedo of ponded ice rn_alb_dpnd = ', rn_alb_dpnd |
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| 339 | ENDIF |
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| 340 | ! |
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| [8505] | 341 | END SUBROUTINE ice_alb_init |
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| [8426] | 342 | |
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| 343 | #else |
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| 344 | !!---------------------------------------------------------------------- |
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| 345 | !! Default option Dummy module NO LIM 3.0 sea-ice model |
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| 346 | !!---------------------------------------------------------------------- |
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| 347 | #endif |
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| 348 | |
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| 349 | !!====================================================================== |
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| 350 | END MODULE icealb |
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