[821] | 1 | MODULE ice_2 |
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[3] | 2 | !!====================================================================== |
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| 3 | !! *** MODULE ice *** |
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| 4 | !! Sea Ice physics: diagnostics variables of ice defined in memory |
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| 5 | !!===================================================================== |
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[2715] | 6 | !! History : 2.0 ! 2003-08 (C. Ethe) F90: Free form and module |
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| 7 | !! 3.3 ! 2009-05 (G.Garric) addition of the lim2_evp cas |
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| 8 | !! 4.0 ! 2011-01 (A. R. Porter, STFC Daresbury) dynamical allocation |
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[888] | 9 | !!---------------------------------------------------------------------- |
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[821] | 10 | #if defined key_lim2 |
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[3] | 11 | !!---------------------------------------------------------------------- |
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[821] | 12 | !! 'key_lim2' : LIM 2.0 sea-ice model |
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[3] | 13 | !!---------------------------------------------------------------------- |
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[2715] | 14 | USE par_ice_2 ! LIM sea-ice parameters |
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[3] | 15 | |
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| 16 | IMPLICIT NONE |
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[12] | 17 | PRIVATE |
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[2528] | 18 | |
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[2715] | 19 | PUBLIC ice_alloc_2 ! Called in iceini_2.F90 |
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| 20 | |
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[2528] | 21 | INTEGER , PUBLIC :: numit !: ice iteration index |
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| 22 | REAL(wp), PUBLIC :: rdt_ice !: ice time step |
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[3] | 23 | |
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[2528] | 24 | ! !!* namicerun read in iceini * |
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[1229] | 25 | CHARACTER(len=32) , PUBLIC :: cn_icerst_in = "restart_ice_in" !: suffix of ice restart name (input) |
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| 26 | CHARACTER(len=32) , PUBLIC :: cn_icerst_out = "restart_ice" !: suffix of ice restart name (output) |
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[1228] | 27 | LOGICAL , PUBLIC :: ln_limdyn = .TRUE. !: flag for ice dynamics (T) or not (F) |
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| 28 | LOGICAL , PUBLIC :: ln_limdmp = .FALSE. !: Ice damping |
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[2528] | 29 | LOGICAL , PUBLIC :: ln_nicep = .TRUE. !: flag grid points output (T) or not (F) |
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| 30 | REAL(wp) , PUBLIC :: hsndif = 0._wp !: snow temp. computation (0) or not (9999) |
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| 31 | REAL(wp) , PUBLIC :: hicdif = 0._wp !: ice temp. computation (0) or not (9999) |
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| 32 | REAL(wp), DIMENSION(2), PUBLIC :: acrit = (/ 1.e-6_wp , 1.e-6_wp /) !: minimum lead fraction in the 2 hemisphere |
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| 33 | |
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| 34 | ! !!* ice-dynamic namelist (namicedyn) * |
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| 35 | INTEGER , PUBLIC :: nbiter = 1 !: number of sub-time steps for relaxation |
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| 36 | INTEGER , PUBLIC :: nbitdr = 250 !: maximum number of iterations for relaxation |
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| 37 | INTEGER , PUBLIC :: nevp = 360 !: number of EVP subcycling iterations |
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| 38 | INTEGER , PUBLIC :: telast = 3600 !: timescale for EVP elastic waves |
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| 39 | REAL(wp), PUBLIC :: epsd = 1.0e-20_wp !: tolerance parameter for dynamic |
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| 40 | REAL(wp), PUBLIC :: alpha = 0.5_wp !: coefficient for semi-implicit coriolis |
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| 41 | REAL(wp), PUBLIC :: dm = 0.6e+03_wp !: diffusion constant for dynamics |
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| 42 | REAL(wp), PUBLIC :: om = 0.5_wp !: relaxation constant |
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| 43 | REAL(wp), PUBLIC :: resl = 5.0e-05_wp !: maximum value for the residual of relaxation |
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| 44 | REAL(wp), PUBLIC :: cw = 5.0e-03_wp !: drag coefficient for oceanic stress |
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| 45 | REAL(wp), PUBLIC :: angvg = 0._wp !: turning angle for oceanic stress |
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| 46 | REAL(wp), PUBLIC :: pstar = 1.0e+04_wp !: first bulk-rheology parameter |
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| 47 | REAL(wp), PUBLIC :: c_rhg = 20._wp !: second bulk-rhelogy parameter |
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| 48 | REAL(wp), PUBLIC :: etamn = 0._wp !: minimun value for viscosity |
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| 49 | REAL(wp), PUBLIC :: creepl = 2.e-08_wp !: creep limit |
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| 50 | REAL(wp), PUBLIC :: ecc = 2._wp !: eccentricity of the elliptical yield curve |
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| 51 | REAL(wp), PUBLIC :: ahi0 = 350._wp !: sea-ice hor. eddy diffusivity coeff. (m2/s) |
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| 52 | REAL(wp), PUBLIC :: alphaevp = 1._wp !: coefficient for the solution of EVP int. stresses |
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[3] | 53 | |
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[2528] | 54 | REAL(wp), PUBLIC :: usecc2 !: = 1.0 / ( ecc * ecc ) |
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| 55 | REAL(wp), PUBLIC :: rhoco !: = rau0 * cw |
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| 56 | REAL(wp), PUBLIC :: sangvg, cangvg !: sin and cos of the turning angle for ocean stress |
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| 57 | REAL(wp), PUBLIC :: pstarh !: pstar / 2.0 |
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[3] | 58 | |
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[2715] | 59 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ahiu , ahiv !: hor. diffusivity coeff. at ocean U- and V-points (m2/s) |
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| 60 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: pahu , pahv !: ice hor. eddy diffusivity coef. at ocean U- and V-points |
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| 61 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ust2s !: friction velocity |
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[2528] | 62 | |
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| 63 | !!* Ice Rheology |
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| 64 | # if defined key_lim2_vp |
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| 65 | ! !!* VP rheology * |
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| 66 | LOGICAL , PUBLIC :: lk_lim2_vp = .TRUE. !: Visco-Plactic reology flag |
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| 67 | ! |
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[2715] | 68 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hsnm , hicm !: mean snow and ice thicknesses |
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[2528] | 69 | ! |
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| 70 | # else |
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| 71 | ! !!* EVP rheology * |
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| 72 | LOGICAL , PUBLIC:: lk_lim2_vp = .FALSE. !: Visco-Plactic reology flag |
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| 73 | ! |
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[2715] | 74 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: stress1_i !: first stress tensor element |
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| 75 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: stress2_i !: second stress tensor element |
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| 76 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: stress12_i !: diagonal stress tensor element |
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| 77 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: delta_i !: rheology delta factor (see Flato and Hibler 95) [s-1] |
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| 78 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: divu_i !: Divergence of the velocity field [s-1] -> limrhg.F90 |
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| 79 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: shear_i !: Shear of the velocity field [s-1] -> limrhg.F90 |
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| 80 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: at_i !: ice fraction |
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[2528] | 81 | ! |
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| 82 | REAL(wp), PUBLIC, DIMENSION(:,:) , POINTER :: vt_s ,vt_i !: mean snow and ice thicknesses |
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[2715] | 83 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:), TARGET :: hsnm , hicm !: target vt_s,vt_i pointers |
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[2528] | 84 | #endif |
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[3] | 85 | |
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[2715] | 86 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rdvosif !: ice volume change at ice surface (only used for outputs) |
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| 87 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rdvobif !: ice volume change at ice bottom (only used for outputs) |
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| 88 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fdvolif !: Total ice volume change (only used for outputs) |
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| 89 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rdvonif !: Lateral ice volume change (only used for outputs) |
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| 90 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sist !: Sea-Ice Surface Temperature [Kelvin] |
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| 91 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: tfu !: Freezing/Melting point temperature of sea water at SSS |
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| 92 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hicif !: Ice thickness |
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| 93 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hsnif !: Snow thickness |
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| 94 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hicifp !: Ice production/melting |
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| 95 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: frld !: Leads fraction = 1-a/totalarea |
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| 96 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: phicif !: ice thickness at previous time |
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| 97 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: pfrld !: Leads fraction at previous time |
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| 98 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qstoif !: Energy stored in the brine pockets |
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| 99 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fbif !: Heat flux at the ice base |
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| 100 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rdmsnif !: Variation of snow mass |
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| 101 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rdmicif !: Variation of ice mass |
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| 102 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qldif !: heat balance of the lead (or of the open ocean) |
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| 103 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qcmif !: Energy needed to freeze the ocean surface layer |
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| 104 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fdtcn !: net downward heat flux from the ice to the ocean |
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| 105 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qdtcn !: energy from the ice to the ocean point (at a factor 2) |
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| 106 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: thcm !: part of the solar energy used in the lead heat budget |
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| 107 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fstric !: Solar flux transmitted trough the ice |
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| 108 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ffltbif !: linked with the max heat contained in brine pockets (?) |
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| 109 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fscmbq !: Linked with the solar flux below the ice (?) |
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| 110 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fsbbq !: Also linked with the solar flux below the ice (?) |
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| 111 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qfvbq !: used to store energy in case of toral lateral ablation (?) |
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| 112 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: dmgwi !: Variation of the mass of snow ice |
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| 113 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: u_ice, v_ice !: two components of the ice velocity at I-point (m/s) |
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| 114 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: u_oce, v_oce !: two components of the ocean velocity at I-point (m/s) |
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[3] | 115 | |
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[2715] | 116 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: tbif !: Temperature inside the ice/snow layer |
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[3] | 117 | |
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[888] | 118 | !!* moment used in the advection scheme |
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[2715] | 119 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxice, syice, sxxice, syyice, sxyice !: for ice volume |
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| 120 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxsn, sysn, sxxsn, syysn, sxysn !: for snow volume |
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| 121 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxa, sya, sxxa, syya, sxya !: for ice cover area |
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| 122 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxc0, syc0, sxxc0, syyc0, sxyc0 !: for heat content of snow |
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| 123 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxc1, syc1, sxxc1, syyc1, sxyc1 !: for heat content of 1st ice layer |
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| 124 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxc2, syc2, sxxc2, syyc2, sxyc2 !: for heat content of 2nd ice layer |
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| 125 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sxst, syst, sxxst, syyst, sxyst !: for heat content of brine pockets |
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| 126 | !!---------------------------------------------------------------------- |
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| 127 | CONTAINS |
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[3] | 128 | |
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[2715] | 129 | INTEGER FUNCTION ice_alloc_2() |
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| 130 | !!----------------------------------------------------------------- |
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| 131 | !! *** FUNCTION ice_alloc_2 *** |
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| 132 | !!----------------------------------------------------------------- |
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| 133 | USE lib_mpp, ONLY: ctl_warn ! MPP library |
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| 134 | INTEGER :: ierr(9) ! Local variables |
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| 135 | !!----------------------------------------------------------------- |
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| 136 | ierr(:) = 0 |
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| 137 | ! |
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| 138 | ALLOCATE( ahiu(jpi,jpj) , pahu(jpi,jpj) , & |
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| 139 | & ahiv(jpi,jpj) , pahv(jpi,jpj) , ust2s(jpi,jpj) , STAT=ierr(1) ) |
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| 140 | ! |
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| 141 | !* Ice Rheology |
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| 142 | #if defined key_lim2_vp |
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| 143 | ALLOCATE( hsnm(jpi,jpj) , hicm(jpi,jpj) , STAT=ierr(2) ) |
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[3] | 144 | #else |
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[2715] | 145 | ALLOCATE( stress1_i (jpi,jpj) , delta_i(jpi,jpj) , at_i(jpi,jpj) , & |
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| 146 | stress2_i (jpi,jpj) , divu_i (jpi,jpj) , hsnm(jpi,jpj) , & |
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| 147 | stress12_i(jpi,jpj) , shear_i(jpi,jpj) , hicm(jpi,jpj) , STAT=ierr(2) ) |
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| 148 | #endif |
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| 149 | ALLOCATE( rdvosif(jpi,jpj) , rdvobif(jpi,jpj) , & |
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| 150 | & fdvolif(jpi,jpj) , rdvonif(jpi,jpj) , & |
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| 151 | & sist (jpi,jpj) , tfu (jpi,jpj) , hicif(jpi,jpj) , & |
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| 152 | & hsnif (jpi,jpj) , hicifp (jpi,jpj) , frld (jpi,jpj) , STAT=ierr(3) ) |
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| 153 | |
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| 154 | ALLOCATE(phicif(jpi,jpj) , pfrld (jpi,jpj) , qstoif (jpi,jpj) , & |
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| 155 | & fbif (jpi,jpj) , rdmsnif(jpi,jpj) , rdmicif(jpi,jpj) , & |
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| 156 | & qldif (jpi,jpj) , qcmif (jpi,jpj) , fdtcn (jpi,jpj) , & |
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| 157 | & qdtcn (jpi,jpj) , thcm (jpi,jpj) , STAT=ierr(4) ) |
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| 158 | |
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| 159 | ALLOCATE(fstric(jpi,jpj) , ffltbif(jpi,jpj) , fscmbq(jpi,jpj) , & |
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| 160 | & fsbbq (jpi,jpj) , qfvbq (jpi,jpj) , dmgwi (jpi,jpj) , & |
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| 161 | & u_ice (jpi,jpj) , v_ice (jpi,jpj) , & |
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| 162 | & u_oce (jpi,jpj) , v_oce (jpi,jpj) , & |
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| 163 | & tbif (jpi,jpj,jplayersp1) , STAT=ierr(5)) |
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| 164 | |
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| 165 | !* moment used in the advection scheme |
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| 166 | ALLOCATE(sxice (jpi,jpj) , syice (jpi,jpj) , sxxice(jpi,jpj) , & |
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| 167 | & syyice(jpi,jpj) , sxyice(jpi,jpj) , & |
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| 168 | & sxsn (jpi,jpj) , sysn (jpi,jpj) , sxxsn (jpi,jpj) , & |
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| 169 | & syysn (jpi,jpj) , sxysn (jpi,jpj) , STAT=ierr(6) ) |
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| 170 | ALLOCATE(sxa (jpi,jpj) , sya (jpi,jpj) , sxxa (jpi,jpj) , & |
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| 171 | & syya (jpi,jpj) , sxya (jpi,jpj) , & |
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| 172 | & sxc0 (jpi,jpj) , syc0 (jpi,jpj) , sxxc0 (jpi,jpj) , & |
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| 173 | & syyc0 (jpi,jpj) , sxyc0 (jpi,jpj) , STAT=ierr(7)) |
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| 174 | ALLOCATE(sxc1 (jpi,jpj) , syc1 (jpi,jpj) , sxxc1 (jpi,jpj) , & |
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| 175 | & syyc1 (jpi,jpj) , sxyc1 (jpi,jpj) , & |
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| 176 | & sxc2 (jpi,jpj) , syc2 (jpi,jpj) , sxxc2 (jpi,jpj) , & |
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| 177 | & syyc2 (jpi,jpj) , sxyc2 (jpi,jpj) , STAT=ierr(8)) |
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| 178 | ALLOCATE(sxst (jpi,jpj) , syst (jpi,jpj) , sxxst (jpi,jpj) , & |
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| 179 | & syyst (jpi,jpj) , sxyst (jpi,jpj) , STAT=ierr(9)) |
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| 180 | ! |
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| 181 | ice_alloc_2 = MAXVAL( ierr ) |
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| 182 | ! |
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| 183 | IF( ice_alloc_2 /= 0 ) CALL ctl_warn('ice_alloc_2: failed to allocate arrays') |
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| 184 | ! |
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| 185 | END FUNCTION ice_alloc_2 |
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| 186 | |
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| 187 | #else |
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[3] | 188 | !!---------------------------------------------------------------------- |
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[821] | 189 | !! Default option Empty module NO LIM 2.0 sea-ice model |
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[3] | 190 | !!---------------------------------------------------------------------- |
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| 191 | #endif |
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[2715] | 192 | !!----------------------------------------------------------------- |
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[2528] | 193 | !! NEMO/LIM2 3.3 , UCL - NEMO Consortium (2010) |
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| 194 | !! $Id$ |
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| 195 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 196 | !!====================================================================== |
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[821] | 197 | END MODULE ice_2 |
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