1 | MODULE limmsh |
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2 | !!====================================================================== |
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3 | !! *** MODULE limmsh *** |
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4 | !! LIM ice model : definition of the ice mesh parameters |
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5 | !!====================================================================== |
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6 | !! History : 3.2 ! 2008-01 (NEMO team) LIM-3: adaptation from LIM-2 |
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7 | !!---------------------------------------------------------------------- |
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8 | #if defined key_lim3 |
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9 | !!---------------------------------------------------------------------- |
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10 | !! 'key_lim3' LIM3 sea-ice model |
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11 | !!---------------------------------------------------------------------- |
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12 | !! lim_msh : definition of the ice mesh |
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13 | !!---------------------------------------------------------------------- |
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14 | USE phycst ! physical constants |
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15 | USE dom_oce ! ocean domain |
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16 | USE dom_ice ! sea-ice domain |
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17 | USE in_out_manager ! I/O manager |
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18 | USE lbclnk ! lateral boundary condition - MPP exchanges |
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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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25 | PUBLIC lim_msh ! routine called by sbcice_lim.F90 |
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26 | |
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27 | !!---------------------------------------------------------------------- |
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28 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) |
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29 | !! $Id$ |
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30 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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31 | !!---------------------------------------------------------------------- |
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32 | CONTAINS |
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33 | |
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34 | SUBROUTINE lim_msh |
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35 | !!------------------------------------------------------------------- |
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36 | !! *** ROUTINE lim_msh *** |
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37 | !! |
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38 | !! ** Purpose : Definition of the charact. of the numerical grid |
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39 | !! |
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40 | !! ** Action : - Initialisation of some variables |
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41 | !! - Definition of some constants linked with the grid |
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42 | !! - Definition of the metric coef. for the sea/ice |
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43 | !! |
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44 | !! Reference : Deleersnijder et al. Ocean Modelling 100, 7-10 |
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45 | !!--------------------------------------------------------------------- |
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46 | INTEGER :: ji, jj ! dummy loop indices |
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47 | REAL(wp) :: zusden ! local scalar |
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48 | !!--------------------------------------------------------------------- |
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49 | |
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50 | IF(lwp) THEN |
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51 | WRITE(numout,*) |
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52 | WRITE(numout,*) 'lim_msh : LIM-3 sea-ice model, mesh initialization' |
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53 | WRITE(numout,*) '~~~~~~~' |
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54 | ENDIF |
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55 | |
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56 | ! !== Equator position ==! |
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57 | njeq = INT( jpj / 2 ) |
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58 | njeqm1 = njeq - 1 |
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59 | ! |
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60 | IF( ff_t(1,1) * ff_t(1,nlcj) < 0._wp ) THEN ! local domain include both hemisphere |
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61 | l_jeq = .TRUE. |
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62 | njeq = 1 |
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63 | DO WHILE ( njeq <= jpj .AND. ff_t(1,njeq) < 0._wp ) |
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64 | njeq = njeq + 1 |
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65 | END DO |
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66 | IF(lwp ) WRITE(numout,*) ' the equator is inside the domain at about njeq = ', njeq |
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67 | ELSEIF( ff_t(1,1) < 0._wp ) THEN |
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68 | l_jeq = .FALSE. |
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69 | njeq = jpj |
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70 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the southern hemisphere: njeq = ', njeq |
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71 | ELSE |
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72 | l_jeq = .FALSE. |
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73 | njeq = 2 |
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74 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the northern hemisphere: njeq = ', njeq |
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75 | ENDIF |
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76 | ! |
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77 | njeqm1 = njeq - 1 |
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78 | |
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79 | |
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80 | ! !== metric coefficients for sea ice dynamic ==! |
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81 | wght(:,:,:,:) = 0._wp |
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82 | !!gm Optimisation : wght to be defined at F-point, not I-point and change in limrhg |
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83 | DO jj = 2, jpj |
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84 | DO ji = 2, jpi |
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85 | zusden = 1._wp / ( ( e1t(ji,jj) + e1t(ji-1,jj ) ) & |
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86 | & * ( e2t(ji,jj) + e2t(ji ,jj-1) ) ) |
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87 | wght(ji,jj,1,1) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
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88 | wght(ji,jj,1,2) = zusden * e1t(ji ,jj) * e2t(ji,jj-1) |
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89 | wght(ji,jj,2,1) = zusden * e1t(ji-1,jj) * e2t(ji,jj ) |
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90 | wght(ji,jj,2,2) = zusden * e1t(ji-1,jj) * e2t(ji,jj-1) |
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91 | END DO |
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92 | END DO |
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93 | CALL lbc_lnk( wght(:,:,1,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V-point |
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94 | CALL lbc_lnk( wght(:,:,1,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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95 | CALL lbc_lnk( wght(:,:,2,1), 'I', 1. ) ! but it is never used |
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96 | CALL lbc_lnk( wght(:,:,2,2), 'I', 1. ) |
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97 | !!gm end |
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98 | |
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99 | ! |
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100 | END SUBROUTINE lim_msh |
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101 | |
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102 | #else |
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103 | !!---------------------------------------------------------------------- |
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104 | !! Default option Dummy Module NO LIM sea-ice model |
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105 | !!---------------------------------------------------------------------- |
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106 | CONTAINS |
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107 | SUBROUTINE lim_msh ! Dummy routine |
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108 | END SUBROUTINE lim_msh |
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109 | #endif |
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110 | |
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111 | !!====================================================================== |
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112 | END MODULE limmsh |
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