[2849] | 1 | MODULE compute_sections |
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| 2 | !!===================================================================== |
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| 3 | !! *** MODULE diadct *** |
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[2947] | 4 | !! Ocean diagnostics: Compute the transport through a section |
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[2849] | 5 | !! |
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[2878] | 6 | !! History: 2011: Clement Bricaud, Mercator-Ocean |
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[2849] | 7 | !! |
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| 8 | !!=============================================================== |
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| 9 | !! * Modules used |
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| 10 | USE declarations |
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| 11 | USE sections_tools |
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| 12 | |
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| 13 | IMPLICIT NONE |
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| 14 | PRIVATE |
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| 15 | |
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| 16 | !! * Routine accessibility |
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| 17 | PUBLIC compsec |
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| 18 | |
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| 19 | !! * Module variables |
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| 20 | |
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| 21 | CONTAINS |
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| 22 | |
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| 23 | SUBROUTINE compsec(jsec,sec,lkdebug) |
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| 24 | !!--------------------------------------------------------------------- |
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| 25 | !! *** ROUTINE compsec *** |
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| 26 | !! |
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[2947] | 27 | !! ** Purpose : Compute the series of mesh points that represent the section |
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[2849] | 28 | !! defined by its extremities. |
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| 29 | !! |
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| 30 | !! ** Method : |
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[2947] | 31 | !! I. Find which cells of the mesh the section is crossing |
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[2849] | 32 | !! II. Classification of the intersections mesh/section |
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[2947] | 33 | !! -first classification west to east |
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[2849] | 34 | !! -second classification south to north |
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| 35 | !! III. Find extremities of section in the mesh |
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[2947] | 36 | !! IV. Find the series of mesh points that form the section |
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[2849] | 37 | !! ** Input: sec : the section to compute |
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| 38 | !! |
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| 39 | !! ** Output: |
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| 40 | !!--------------------------------------------------------------------- |
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| 41 | !! * Arguments |
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[2947] | 42 | INTEGER,INTENT(IN) :: jsec ! number of the section |
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| 43 | TYPE(SECTION), INTENT(INOUT) :: sec ! information about the section |
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| 44 | LOGICAL ,INTENT(IN) :: lkdebug ! debug or not debug this section |
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[2849] | 45 | |
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| 46 | !! * Local variables |
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| 47 | INTEGER :: & |
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| 48 | ji,jj , & ! dummy loop argument |
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[2947] | 49 | jseg , & ! loop on segments that form the section |
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| 50 | nb_inmesh , & ! number of intersections between the section and the mesh |
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[2849] | 51 | nmesh ! number of cells in processor domain |
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[2860] | 52 | INTEGER :: itest , jtest ! dummy integer |
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[2849] | 53 | REAL(wp) :: & |
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| 54 | zdistEst , zdistNorth , zdistWest , zdistSouth , &! temporary scalars |
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| 55 | zdistEst2 , zdistNorth2, zdistWest2, zdistSouth2, &! temporary scalars |
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| 56 | zdistEst3 , zdistNorth3, zdistWest3, zdistSouth3, &! temporary scalars |
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[2947] | 57 | zdistFirst , zdistLast , zdistref , &! temporary scalars |
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| 58 | zdistante , zdistante2 , zdistnew , zdistnew2 , &! temporary scalars |
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| 59 | zdeltai , zdeltaj ! temporary scalars |
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[2849] | 60 | LOGICAL :: & |
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| 61 | ll_overlap_sec_left = .FALSE. , ll_overlap_sec_right = .FALSE. ,&! temporary logical |
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[2947] | 62 | ll_date_domain_left = .FALSE. , ll_date_domain_right = .FALSE. ,&! temporary logical |
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| 63 | ll_overlap_sec = .FALSE. , ll_date_domain = .FALSE. ,&! temporary logical |
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| 64 | ll_test = .FALSE. ! temporary logical |
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[2849] | 65 | LOGICAL :: lest, lwest, lnorth, lsouth |
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| 66 | LOGICAL :: l_oldmethod |
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| 67 | CHARACTER(len=120) :: cltmp |
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| 68 | TYPE(COORD_SECTION) :: & |
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| 69 | coord_a , coord_b , coord_d , coord_t , &!temporary point (long/lat) |
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| 70 | coordFirst, coordLast, coordTemp ! " |
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| 71 | TYPE(COORD_SECTION), DIMENSION(nb_point_max) :: coordSec !intersections mesh/section |
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| 72 | TYPE(POINT_SECTION) :: & |
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| 73 | endingPoint, prevPoint , nextPoint, &!temporary point (I/J) |
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| 74 | SouthPoint , NorthPoint, EstPoint , WestPoint ! " |
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| 75 | !!--------------------------------------------------------------------- |
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[2858] | 76 | IF( jsec==1 )THEN |
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[2849] | 77 | PRINT*,' ' |
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| 78 | PRINT*,'COMPUTE SECTIONS' |
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| 79 | PRINT*,'----------------' |
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| 80 | ENDIF |
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| 81 | |
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| 82 | !debug |
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| 83 | CALL write_debug(jsec,'compute section:') |
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| 84 | CALL write_debug(jsec,'================') |
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| 85 | |
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| 86 | |
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| 87 | !==================! |
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| 88 | !0. Initializations! |
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| 89 | !==================! |
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| 90 | |
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| 91 | nmesh = jpi*jpj ! number of cells in processor domain |
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[2947] | 92 | nb_inmesh = 0 ! initialize number of intersections between section and the mesh |
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[2849] | 93 | zdistEst =0. ; zdistNorth=0. ; zdistWest=0. ; zdistSouth=0. ! temporary scalars |
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[2947] | 94 | zdistFirst=0. ; zdistLast =0. ! temporary scalars |
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| 95 | zdistante =0. ; zdistante2=0. ; zdistnew=0. ; zdistnew2=0. ! temporary scalars |
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[2849] | 96 | zdeltai=0. ; zdeltaj=0. |
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| 97 | coord_a = COORD_SECTION( 0., 0. ) ; coord_b = COORD_SECTION( 0., 0. ) |
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| 98 | coord_d = COORD_SECTION( 0., 0. ) ; coord_t = COORD_SECTION( 0., 0. ) |
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| 99 | coordFirst = COORD_SECTION( 0., 0. ) ; coordLast = COORD_SECTION( 0., 0. ) |
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| 100 | coordTemp = COORD_SECTION( 0., 0. ) ; coordSec = COORD_SECTION( 0., 0. ) |
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| 101 | endingPoint = POINT_SECTION( -1, -1 ) |
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| 102 | prevPoint = POINT_SECTION( -1, -1 ) ; nextPoint = POINT_SECTION( -1, -1 ) |
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| 103 | SouthPoint = POINT_SECTION( -1, -1 ) ; NorthPoint = POINT_SECTION( -1, -1 ) |
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| 104 | EstPoint = POINT_SECTION( -1, -1 ) ; WestPoint = POINT_SECTION( -1, -1 ) |
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| 105 | |
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| 106 | !===========================================================! |
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[2947] | 107 | !I. Find which cells of the mesh the section is crossing ! |
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[2849] | 108 | !===========================================================! |
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| 109 | |
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| 110 | !loop on the mesh |
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[2858] | 111 | DO jj=2,jpj |
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| 112 | DO ji=2,jpi |
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[2849] | 113 | !----------------------------------------------------------- |
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| 114 | !For each cell of the mesh, we find the intersection between |
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| 115 | !the section and the cell as described below: |
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| 116 | !The cell is defined by 4 points A B C D |
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| 117 | !and the section by S1 and S2 |
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| 118 | ! |
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| 119 | !Section\ ________ |
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| 120 | ! \ B| | |
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| 121 | ! \ | | |
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| 122 | ! \|one cell| |
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| 123 | ! .....\ | |
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| 124 | ! |\ | |
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| 125 | ! | \ | |
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| 126 | ! A|__\_____|D |
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| 127 | ! ........\ |
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| 128 | !----------------\------------------------------------------- |
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| 129 | |
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| 130 | !definition of points A,B,D (we don't need C) |
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| 131 | coord_a = COORD_SECTION( glamf(ji-1,jj-1) ,gphif(ji-1,jj-1) ) |
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| 132 | coord_b = COORD_SECTION( glamf(ji-1,jj) ,gphif(ji-1,jj) ) |
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| 133 | coord_d = COORD_SECTION( glamf(ji,jj-1) ,gphif(ji,jj-1) ) |
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| 134 | |
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| 135 | !size of the cell |
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| 136 | zdeltai= glamf(ji-1,jj) - glamf(ji-1,jj-1) !zdeltai=[AB] |
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| 137 | zdeltaj= gphif(ji,jj-1) - gphif(ji-1,jj-1) !zdeltaj=[AD] |
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| 138 | |
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[2949] | 139 | !intersection section/[AB]=? |
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| 140 | coordTemp = intersec(sec,coord_a,coord_b) !compute intersection |
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[2849] | 141 | |
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[2949] | 142 | IF( coordTemp%lon .NE. -9999 )THEN |
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| 143 | IF( nb_inmesh+1 .GT. nb_point_max )THEN |
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| 144 | PRINT*,"WARNING diadct: nb_point_max needs to be greater than ", nb_inmesh |
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| 145 | ELSE |
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| 146 | nb_inmesh=nb_inmesh+1 |
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| 147 | coordSec(nb_inmesh) = coordTemp !store the intersection's coordinates |
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[2849] | 148 | |
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[2949] | 149 | !We need to know if the section crosses the overlapping band. |
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[2849] | 150 | |
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[2949] | 151 | !Fist we look if there is an intersection mesh/section |
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| 152 | !just on the left of the overlapping band: |
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| 153 | IF( coordTemp%lon .GT. glamf(1,1)-5 .AND. coordTemp%lon .LT. glamf(1,1) ) & |
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| 154 | & ll_overlap_sec_left = .TRUE. |
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| 155 | !And we look if there is an intersection mesh/section |
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| 156 | !just on the right of the overlapping band: |
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| 157 | IF( coordTemp%lon .GT. glamf(jpi,1) .AND. coordTemp%lon .LT. glamf(1,1)+5 ) & |
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| 158 | & ll_overlap_sec_right = .TRUE. |
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[2858] | 159 | ENDIF |
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[2949] | 160 | ENDIF |
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[2849] | 161 | |
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[2949] | 162 | !intersection section/[AD]=? |
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| 163 | coordTemp=intersec(sec,coord_a,coord_d) !compute intersection |
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| 164 | coordTemp%lon = coordTemp%lon !* zmask(ji,jj)-9999.*(1-zmask(ji,jj)) |
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| 165 | coordTemp%lat = coordTemp%lat !* zmask(ji,jj)-9999.*(1-zmask(ji,jj)) |
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[2849] | 166 | |
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[2949] | 167 | IF( coordTemp%lon .NE. -9999 )THEN |
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| 168 | IF( nb_inmesh+1 .GT. nb_point_max )THEN |
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| 169 | PRINT*, "WARNING diadct: nb_point_max needs to be greater than ", nb_inmesh |
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| 170 | ELSE |
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| 171 | nb_inmesh=nb_inmesh+1 |
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| 172 | coordSec(nb_inmesh)=coordTemp |
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[2849] | 173 | |
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[2949] | 174 | !We need to know if the section crosses the overlapping band: |
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| 175 | !same test as above |
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| 176 | IF( coordTemp%lon .GE. glamf(1,1)-3 .AND. coordTemp%lon .LE. glamf(1,1) ) & |
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| 177 | & ll_overlap_sec_left = .TRUE. |
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| 178 | IF( coordTemp%lon .GE. glamf(jpi,1) .AND. coordTemp%lon .LE. glamf(jpi,1)+3) & |
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| 179 | & ll_overlap_sec_right = .TRUE. |
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[2858] | 180 | ENDIF |
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| 181 | ENDIF |
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[2849] | 182 | |
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[2858] | 183 | !We need to know if the domain crosses the date line: |
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| 184 | !Fist, we search a mesh point that is just one the left of date line: |
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| 185 | IF( glamf(ji-1,jj-1) .GT. 175 .AND. glamf(ji-1,jj-1) .LT. 180 ) & |
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| 186 | & ll_date_domain_left = .TRUE. |
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| 187 | !And we search a mesh point that is just one the right of date line: |
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| 188 | IF( glamf(ji-1,jj-1) .GT. -180 .AND. glamf(ji-1,jj-1) .LT. -175 ) & |
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| 189 | & ll_date_domain_right = .TRUE. |
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[2849] | 190 | |
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[2858] | 191 | ENDDO |
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| 192 | ENDDO !End of the loop on the mesh |
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| 193 | |
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[2849] | 194 | |
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| 195 | !Crossing section/overlapping band (we need to know it for later): |
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| 196 | !----------------------------------------------------------------- |
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| 197 | !If there is one intersection mesh/section just on the left of |
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| 198 | !the overlapping band (ll_overlap_sec_left = .TRUE.) |
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| 199 | !AND there is one just the right of the overlapping band |
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| 200 | !(ll_overlap_sec_right = .TRUE.), |
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| 201 | !so the section crosses the overlapping band. |
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| 202 | ll_overlap_sec = ll_overlap_sec_left .AND. ll_overlap_sec_right |
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| 203 | |
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| 204 | !Crossing of the domain and the date line (we need to know it for later): |
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| 205 | !------------------------------------------------------------------------ |
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| 206 | !If there is one point of the domain that is just on the left of the date line |
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| 207 | !(ll_date_domain_left = .TRUE.) AND one point that is just on the right of the |
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| 208 | !date line (ll_date_domain_right = .TRUE. ) |
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| 209 | !So the domain crosses the date line: |
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| 210 | ll_date_domain = ll_date_domain_left .AND. ll_date_domain_right |
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| 211 | |
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| 212 | !=====================================================! |
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| 213 | ! II. Classification of the intersections mesh/section! |
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| 214 | !=====================================================! |
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| 215 | |
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| 216 | ! -first classification west to east |
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| 217 | ! -second classification south to north |
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| 218 | !CAUTION: routine qcksrt doesn't work in the same way if the section |
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| 219 | !and the domain crosse the date line (sec%ll_date_line=T and ll_date_domain=T) |
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| 220 | |
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| 221 | IF( sec%ll_date_line .AND. ll_date_domain )THEN |
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[2858] | 222 | |
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[2947] | 223 | !we add 360° to negative longitudes to have a good classification |
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[2858] | 224 | DO jseg=1,nb_inmesh |
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| 225 | IF( coordSec(jseg)%lon .LT. 0 ) coordSec(jseg)%lon=coordSec(jseg)%lon+360. |
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| 226 | ENDDO |
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| 227 | IF( sec%coordSec(1)%lon .NE. sec%coordSec(2)%lon ) THEN |
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| 228 | CALL qcksrt(coordSec(:)%lon,coordSec(:)%lat,nb_inmesh) |
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| 229 | ELSE |
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| 230 | CALL qcksrt(coordSec(:)%lat,coordSec(:)%lon,nb_inmesh) |
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| 231 | ENDIF |
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| 232 | DO jseg=1,nb_inmesh |
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| 233 | IF( coordSec(jseg)%lon .GT. 180 ) coordSec(jseg)%lon=coordSec(jseg)%lon-360. |
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| 234 | ENDDO |
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| 235 | |
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[2849] | 236 | ELSE |
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[2858] | 237 | |
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| 238 | IF( sec%coordSec(1)%lon .NE. sec%coordSec(2)%lon )THEN |
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| 239 | CALL qcksrt(coordSec(:)%lon,coordSec(:)%lat,nb_inmesh) |
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| 240 | ELSE |
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| 241 | CALL qcksrt(coordSec(:)%lat,coordSec(:)%lon,nb_inmesh) |
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| 242 | ENDIF |
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| 243 | |
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[2849] | 244 | ENDIF |
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| 245 | |
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| 246 | !debug |
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| 247 | WRITE(cltmp,'(A20,i3.3)')'number intersections = ',nb_inmesh ; CALL write_debug(jsec,cltmp) |
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| 248 | CALL write_debug(jsec,'List of intersections between grid and section: ') |
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| 249 | DO jseg=1,nb_inmesh |
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| 250 | WRITE(cltmp,'(i4.4,1X,2(f8.3,1X) )')jseg,coordSec(jseg) ; CALL write_debug(jsec,cltmp) |
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| 251 | ENDDO |
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| 252 | |
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| 253 | !=====================================================! |
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| 254 | ! III. Find extremities of section in the mesh ! |
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| 255 | !=====================================================! |
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| 256 | !we can find section's extremities in the mesh only if |
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| 257 | !there is intersection between section and mesh (nb_inmesh .ne. 0) |
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| 258 | |
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| 259 | IF( nb_inmesh .ne. 0 )THEN |
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[2858] | 260 | coordFirst = coordSec(1) |
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| 261 | coordLast = coordSec(nb_inmesh) |
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| 262 | sec%nb_point = nb_inmesh |
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| 263 | sec%listPoint(1) = POINT_SECTION(-1,-1) |
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| 264 | zdistante = 1000. |
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| 265 | zdistante2 = 1000. |
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[2849] | 266 | |
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[2858] | 267 | !First, we find the point of the mesh that is the closest |
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| 268 | !to the first intersection section/mesh (=coordFirst=coordSec(1)): |
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| 269 | !this point will be called sec%listPoint(1). |
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| 270 | !Then, we find the point of the mesh that is the closest |
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| 271 | !to the last intersection section/mesh (coordLast=coordSec(nb_inmesh)) |
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| 272 | !this point will be called endingPoint. |
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[2849] | 273 | |
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[2858] | 274 | DO jj=1,jpj |
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| 275 | DO ji=1,jpi |
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| 276 | coord_t=COORD_SECTION(glamf(ji,jj),gphif(ji,jj)) |
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[2877] | 277 | zdistFirst = distance2(coord_t,coordFirst) |
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| 278 | zdistLast = distance2(coord_t,coordLast) |
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[2949] | 279 | IF( zdistFirst .LT. zdistante )THEN |
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[2858] | 280 | sec%listPoint(1) = POINT_SECTION(ji,jj) |
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| 281 | zdistante=zdistFirst |
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| 282 | ENDIF |
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[2949] | 283 | IF( zdistLast .LT. zdistante2 )THEN |
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[2858] | 284 | endingPoint = POINT_SECTION(ji,jj) |
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| 285 | zdistante2=zdistLast |
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| 286 | ENDIF |
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| 287 | ENDDO |
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| 288 | ENDDO |
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[2849] | 289 | |
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[2858] | 290 | IF( sec%listPoint(1)%I == endingPoint%I .AND. sec%listPoint(1)%J == endingPoint%J )THEN |
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| 291 | sec%listPoint(1) = POINT_SECTION(-1,-1) |
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| 292 | endingPoint = POINT_SECTION(-1,-1) |
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| 293 | coordFirst = coordSec(1) |
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| 294 | coordLast = coordSec(2) |
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| 295 | sec%nb_point = 0 |
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| 296 | ENDIF |
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[2849] | 297 | |
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| 298 | ELSE |
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[2858] | 299 | !If there is no intersection section/mesh |
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| 300 | sec%listPoint(1) = POINT_SECTION(-1,-1) |
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| 301 | endingPoint = POINT_SECTION(-1,-1) |
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| 302 | coordFirst = coordSec(1) |
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| 303 | coordLast = coordSec(2) |
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| 304 | sec%nb_point = 0 |
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[2849] | 305 | ENDIF |
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| 306 | |
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| 307 | !debug |
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| 308 | CALL write_debug(jsec,"extremities of section in the grid : ") |
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| 309 | ji=sec%listPoint(1)%I ; jj=sec%listPoint(1)%J |
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[2860] | 310 | IF( sec%nb_point .ne. 0 )THEN |
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| 311 | ji=sec%listPoint(1)%I ; jj=sec%listPoint(1)%J |
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| 312 | WRITE(cltmp,'(A15,X,i4.4,X,i4.4,X,f8.3,X,f8.3)')'First point: ',sec%listPoint(1),glamf(ji,jj),gphif(ji,jj) |
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| 313 | CALL write_debug(jsec,cltmp) |
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| 314 | ji=endingPoint%I ; jj=endingPoint%J |
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| 315 | WRITE(cltmp,'(A15,X,i4.4,X,i4.4,X,f8.3,X,f8.3)')'Last point: ',endingPoint,glamf(ji,jj),gphif(ji,jj) |
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| 316 | CALL write_debug(jsec,cltmp) |
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| 317 | ! |
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| 318 | coord_a=pointToCoordF(sec%listPoint(1)) ; coord_b=pointToCoordF(endingPoint) |
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| 319 | ll_test = .FALSE. |
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| 320 | IF ( ll_date_domain .AND. ABS( coord_a%lon - coord_b%lon ).GT. 180) ll_test= .TRUE. |
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| 321 | zdistante=distance2(coord_a,coord_b ,ll_test ) |
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| 322 | WRITE(cltmp,'(A20,f10.3)' )'distance between IJ-extremities : ',zdistante |
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| 323 | CALL write_debug(jsec,cltmp) |
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| 324 | ! |
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| 325 | CALL write_debug(jsec,"Initial extremities : ") |
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| 326 | WRITE(cltmp,'( 2(f9.3),A3,2(f9.3) )')coordFirst,'---',coordLast |
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| 327 | CALL write_debug(jsec,cltmp) |
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| 328 | ll_test = .FALSE. |
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| 329 | IF( ll_date_domain .AND. ABS(coordFirst%lon - coordLast%lon).GT. 180)ll_test= .TRUE. |
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| 330 | zdistante=distance2(coordFirst,coordLast,ll_test) |
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| 331 | WRITE(cltmp,'(A30,f10.3)')' distance between initial extremities : ',zdistante |
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| 332 | CALL write_debug(jsec,cltmp) |
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| 333 | CALL write_debug(jsec," ") |
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| 334 | ELSE |
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| 335 | WRITE(cltmp,'(A50)' )"no intersection between section and mesh" |
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| 336 | ENDIF |
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[2849] | 337 | |
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| 338 | !==========================================================! |
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[2947] | 339 | ! IV. Find the series of mesh points that form the section ! |
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[2849] | 340 | !==========================================================! |
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| 341 | CALL write_debug(jsec,"Find the serie of mesh's points that form the section") |
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| 342 | |
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[2860] | 343 | IF( sec%nb_point .ne. 0 )THEN |
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[2849] | 344 | |
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[2947] | 345 | !The series of mesh points that form the section will 'link' |
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[2858] | 346 | !sec%listPoint(1) to endingPoint: it will be stored in |
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| 347 | !sec%listPoint(jseg) |
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| 348 | ! |
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[2947] | 349 | !We take place on the first point (sec%listPoint(1)) |
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[2858] | 350 | ! a. We find the 4 adjacent points (North, South, East, West) |
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| 351 | ! b. Compute distance between current point and endingPoint |
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| 352 | ! c. Compute distance between the 4 adjacent points and endingPoint |
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| 353 | ! d. Select the points which are closer to end-point than current point |
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| 354 | ! e.1 If at least one point is selected, select the point which is closest to original section among selected points |
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| 355 | ! e.2 If no point is selected, select the point which is the closest to end-point |
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| 356 | ! f. save next point and direction of velocity. |
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| 357 | ! g. Save nextPoint and go to nextPoint |
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| 358 | ! |
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| 359 | !We get out of this loop if: |
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| 360 | ! - we are on endingPoint |
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| 361 | ! - the number of points (jseg) that link sec%listPoint(1) to endingPoint is |
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| 362 | ! twice greater than number of section/mesh intersection (nb_inmesh): |
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| 363 | ! it could be possible if thr algorithm can't link endingPoint (bug). |
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[2849] | 364 | |
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[2858] | 365 | !initialize distnew value (with distance between section's extremities) |
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[2877] | 366 | zdistnew = distance2(coordFirst,coordLast,sec%ll_date_line) |
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[2858] | 367 | prevPoint = POINT_SECTION(0,0) |
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| 368 | jseg = 1 |
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[2849] | 369 | |
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[2858] | 370 | DO WHILE ( ( sec%listPoint(jseg)%I .NE. endingPoint%I & |
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| 371 | .OR. sec%listPoint(jseg)%J .NE. endingPoint%J ) & |
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[3632] | 372 | .AND. jseg .LT. nb_inmesh + 10 .AND. sec%listPoint(jseg)%I .GT. 0 ) |
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[2849] | 373 | |
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[2858] | 374 | ! a. find the 4 adjacent points (North, South, East, West) |
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| 375 | !--------------------------------------------------------- |
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| 376 | SouthPoint = POINT_SECTION(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J-1) |
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| 377 | NorthPoint = POINT_SECTION(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J+1) |
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| 378 | WestPoint = POINT_SECTION(sec%listPoint(jseg)%I-1,sec%listPoint(jseg)%J) |
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| 379 | EstPoint = POINT_SECTION(sec%listPoint(jseg)%I+1,sec%listPoint(jseg)%J) |
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[2849] | 380 | |
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[2858] | 381 | !debug |
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| 382 | CALL write_debug(jsec,"---------------") |
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| 383 | WRITE(cltmp,100)'Current points: ',sec%listPoint(jseg), & |
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| 384 | glamf(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J), & |
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| 385 | gphif(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J) |
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| 386 | CALL write_debug(jsec,cltmp) |
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| 387 | CALL write_debug(jsec,"E/W/N/S points") |
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| 388 | WRITE(cltmp,102)EstPoint,WestPoint,NorthPoint,SouthPoint |
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| 389 | CALL write_debug(jsec,cltmp) |
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[2860] | 390 | itest=MIN(MAX(EstPoint%I,0),jpi+1) ; jtest=MIN(MAX(EstPoint%J,0),jpj+1) |
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| 391 | IF( itest .NE. 0 .AND. itest .NE. jpi+1 .AND. jtest .NE. 0 .AND. jtest .NE. jpj+1 )THEN |
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| 392 | WRITE(cltmp,101)'Est',glamf(itest,jtest),gphif(itest,jtest) |
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| 393 | CALL write_debug(jsec,cltmp) |
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| 394 | ELSE |
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| 395 | CALL write_debug(jsec,"Est point out of domain") |
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| 396 | ENDIF |
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| 397 | ! |
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| 398 | itest=MIN(MAX(WestPoint%I,0),jpi+1) ; jtest=MIN(MAX(WestPoint%J,0),jpj+1) |
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| 399 | IF( itest .NE. 0 .AND. itest .NE. jpi+1 .AND. jtest .NE. 0 .AND. jtest .NE. jpj+1 )THEN |
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| 400 | WRITE(cltmp,101)'West',glamf(itest,jtest),gphif(itest,jtest) |
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| 401 | CALL write_debug(jsec,cltmp) |
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| 402 | ELSE |
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| 403 | CALL write_debug(jsec,"West point out of domain") |
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| 404 | ENDIF |
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| 405 | ! |
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| 406 | itest=MIN(MAX(NorthPoint%I,0),jpi+1) ; jtest=MIN(MAX(NorthPoint%J,0),jpj+1) |
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| 407 | IF( itest .NE. 0 .AND. itest .NE. jpi+1 .AND. jtest .NE. 0 .AND. jtest .NE. jpj+1 )THEN |
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| 408 | WRITE(cltmp,101)'North',glamf(itest,jtest),gphif(itest,jtest) |
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| 409 | CALL write_debug(jsec,cltmp) |
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| 410 | ELSE |
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| 411 | CALL write_debug(jsec,"North point out of domain") |
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| 412 | ENDIF |
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| 413 | ! |
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| 414 | itest=MIN(MAX(SouthPoint%I,0),jpi+1) ; jtest=MIN(MAX(SouthPoint%J,0),jpj+1) |
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| 415 | IF( itest .NE. 0 .AND. itest .NE. jpi+1 .AND. jtest .NE. 0 .AND. jtest .NE. jpj+1 )THEN |
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| 416 | WRITE(cltmp,101)'South',glamf(itest,jtest),gphif(itest,jtest) |
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| 417 | CALL write_debug(jsec,cltmp) |
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| 418 | ELSE |
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| 419 | CALL write_debug(jsec,"South point out of domain") |
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| 420 | ENDIF |
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| 421 | ! |
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| 422 | ! |
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[2879] | 423 | 100 FORMAT ( A15,2(i4.4," "),2(f8.3," ") ) |
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[2860] | 424 | 101 FORMAT ( A6,2(f7.3," ")) |
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[2858] | 425 | 102 FORMAT ( "E ",i4.4,' ',i4.4,"//W ",i4.4,' ',i4.4,"//N ",i4.4,' ',i4.4,"//S ",i4.4,' ',i4.4 ) |
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[2849] | 426 | |
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| 427 | |
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[2947] | 428 | !Either we are at an end-point |
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[2858] | 429 | !-------------------- |
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| 430 | IF( SouthPoint%I==endingPoint%I .AND. SouthPoint%J==endingPoint%J )THEN |
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[3632] | 431 | sec%direction(jseg)=2 ; jseg = jseg+1 ; sec%listPoint(jseg) = SouthPoint |
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[2858] | 432 | ELSE IF( NorthPoint%I==endingPoint%I .AND. NorthPoint%J==endingPoint%J )THEN |
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[3632] | 433 | sec%direction(jseg)=3 ; jseg = jseg+1 ; sec%listPoint(jseg) = NorthPoint |
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[2858] | 434 | ELSE IF( WestPoint%I==endingPoint%I .AND. WestPoint%J==endingPoint%J )THEN |
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[3632] | 435 | sec%direction(jseg)=0 ; jseg = jseg+1 ; sec%listPoint(jseg) = WestPoint |
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[2858] | 436 | ELSE IF( EstPoint%I==endingPoint%I .AND. EstPoint%J==endingPoint%J )THEN |
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[3632] | 437 | sec%direction(jseg)=1 ; jseg = jseg+1 ; sec%listPoint(jseg) = EstPoint |
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[2849] | 438 | |
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[2858] | 439 | ELSE |
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[2947] | 440 | !Else we are NOT on end-point |
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[2858] | 441 | !------------------------ |
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[2849] | 442 | |
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[2858] | 443 | ! b. distance between current point and endingPoint |
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| 444 | !-------------------------------------------------- |
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| 445 | zdistante = zdistnew |
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[2849] | 446 | |
---|
[2858] | 447 | ! c. compute distance between the 4 adjacent points and endingPoint |
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| 448 | !------------------------------------------------------------------ |
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[2947] | 449 | ! BE CAREFUL! When the domain crosses the date line (ll_date_domain): |
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[2948] | 450 | ! |
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[2858] | 451 | ! When we will compute distances between W/E/S/N points and endingPoint, |
---|
| 452 | ! we have to check if theses 4 lines crosses the date line |
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| 453 | ! (test: ABS(coordTemp%lon - coordLast%lon).GT. 180) |
---|
[2948] | 454 | ! |
---|
[2951] | 455 | ! If one of these lines crosses the date line, we have to add 360° |
---|
| 456 | ! to the longitudes of the extremities to compute the distance through |
---|
| 457 | ! the date line and not around the Earth. |
---|
[2849] | 458 | |
---|
[2858] | 459 | ! c.1 compute distWest: distance between west point and endingPoint |
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| 460 | !---------------------- |
---|
| 461 | zdistWest2 = 99999999.9 ; zdistWest3 = 99999999.9 |
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| 462 | IF( sec%listPoint(jseg)%I .NE. 1 )THEN |
---|
| 463 | !When we are on the west side of the mesh (i=1),we can't go to the west. |
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| 464 | coordTemp = pointToCoordF(WestPoint) |
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| 465 | ll_test = .FALSE. |
---|
| 466 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test = .TRUE. |
---|
| 467 | zdistWest2 = distance2(pointToCoordF(WestPoint) ,coordLast ,ll_test) |
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| 468 | ENDIF |
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[2849] | 469 | |
---|
[2858] | 470 | ! c.2 compute distEst: distance between east point and endingPoint |
---|
| 471 | !--------------------- |
---|
| 472 | zdistEst2 = 99999999.9 ; zdistEst3 = 99999999.9 |
---|
| 473 | IF( sec%listPoint(jseg)%I .EQ. jpi )THEN |
---|
| 474 | !We test if the current point is on the east side of the mesh |
---|
[2947] | 475 | ! The method is done such that we go toward east to link |
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[2858] | 476 | ! sec%listPoint(1) to endingPoint. |
---|
| 477 | ! So, if the section crosses the overlapping band (ll_overlap_sec=T), |
---|
| 478 | ! we won't have to stop if the current point is on the EAST side of the mesh: |
---|
| 479 | ! we have to follow the construction of the section on the |
---|
| 480 | ! WEST side of the mesh |
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| 481 | IF( ll_overlap_sec )THEN |
---|
| 482 | !section crosses the overlapping band |
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[2947] | 483 | !So EastPoint is on the west side of the mesh |
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[2858] | 484 | EstPoint = POINT_SECTION(3,sec%listPoint(jseg)%J) |
---|
| 485 | zdistEst2= distance2(pointToCoordF(EstPoint) ,coordLast ,.FALSE.) |
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| 486 | ENDIF |
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| 487 | ELSE |
---|
| 488 | coordTemp = pointToCoordF(EstPoint) |
---|
| 489 | ll_test = .FALSE. |
---|
| 490 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test= .TRUE. |
---|
| 491 | zdistEst2 = distance2(pointToCoordF(EstPoint) ,coordLast ,ll_test ) |
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| 492 | ENDIF |
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[2849] | 493 | |
---|
[2858] | 494 | ! c.3 compute distSouth: distance between south point and endingPoint |
---|
| 495 | !----------------------- |
---|
| 496 | zdistSouth2 = 99999999.9 ; zdistSouth3 = 99999999.9 |
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| 497 | IF( sec%listPoint(jseg)%J .NE. 1 )THEN |
---|
| 498 | !When we are on the south side of the mesh (j=1),we can't go to the south. |
---|
| 499 | coordTemp=pointToCoordF(SouthPoint) |
---|
| 500 | ll_test = .FALSE. |
---|
| 501 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test= .TRUE. |
---|
| 502 | zdistSouth2 = distance2(pointToCoordF(SouthPoint),coordlast ,ll_test ) |
---|
| 503 | ENDIF |
---|
[2849] | 504 | |
---|
[2858] | 505 | ! c.4 compute distNorth: distance between north and endingPoint |
---|
| 506 | !----------------------- |
---|
| 507 | zdistNorth2 = 99999999.9 ; zdistNorth3 = 99999999.9 |
---|
| 508 | IF( sec%listPoint(jseg)%J .NE. jpj )THEN |
---|
| 509 | !When we are on the north side of the mesh (j=jpj),we can't go to the south. |
---|
| 510 | coordTemp=pointToCoordF(NorthPoint) |
---|
| 511 | ll_test = .FALSE. |
---|
| 512 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test= .TRUE. |
---|
| 513 | zdistNorth2 = distance2(pointToCoordF(NorthPoint),coordlast ,ll_test ) |
---|
| 514 | ENDIF |
---|
[2849] | 515 | |
---|
[2858] | 516 | ! d. select the points which are closer to end-point than current point |
---|
| 517 | !---------------------------------------------------------------------- |
---|
| 518 | zdistref=distance2(pointToCoordF(sec%listPoint(jseg)),coordlast ,ll_test ) |
---|
| 519 | WRITE(cltmp,'( A56,f10.3 )' )'distance between actual point and last point: zdistref = ',zdistref |
---|
| 520 | CALL write_debug(jsec,cltmp) |
---|
| 521 | lest = .FALSE. ; IF( zdistEst2 .LE. zdistref ) lest = .TRUE. |
---|
| 522 | lwest = .FALSE. ; IF( zdistwest2 .LE. zdistref ) lwest = .TRUE. |
---|
| 523 | lnorth = .FALSE. ; IF( zdistnorth2 .LE. zdistref ) lnorth= .TRUE. |
---|
| 524 | lsouth = .FALSE. ; IF( zdistsouth2 .LE. zdistref ) lsouth= .TRUE. |
---|
[2849] | 525 | |
---|
[2858] | 526 | !debug |
---|
| 527 | IF( .NOT. lest )CALL write_debug(jsec,'Est point eliminated') |
---|
| 528 | IF( .NOT. lwest )CALL write_debug(jsec,'West point eliminated') |
---|
| 529 | IF( .NOT. lnorth )CALL write_debug(jsec,'North point eliminated') |
---|
| 530 | IF( .NOT. lsouth )CALL write_debug(jsec,'South point eliminated') |
---|
[2849] | 531 | |
---|
[2858] | 532 | l_oldmethod = .FALSE. |
---|
[2849] | 533 | |
---|
[2858] | 534 | IF( ( COUNT((/lest/))+COUNT((/lwest/))+COUNT((/lnorth/))+COUNT((/lsouth/)) ) .NE. 0 )THEN |
---|
[2849] | 535 | |
---|
[2858] | 536 | ! e.1 If at least one point is selected, select the point |
---|
| 537 | ! which is the closest to original section among selected points |
---|
| 538 | !------------------------------------------------------------------- |
---|
[2849] | 539 | |
---|
[2858] | 540 | zdistWest3 = 9999999.9 |
---|
| 541 | IF( lwest )zdistWest3 = & |
---|
| 542 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(WestPoint) ,pointToCoordF(endingPoint) ,lkdebug ) |
---|
| 543 | zdistEst3 = 9999999.9 |
---|
| 544 | IF( lest )zdistEst3 = & |
---|
| 545 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(EstPoint) ,pointToCoordF(endingPoint) ,lkdebug ) |
---|
| 546 | zdistSouth3 = 9999999.9 |
---|
| 547 | IF( lsouth )zdistSouth3 = & |
---|
| 548 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(SouthPoint),pointToCoordF(endingPoint) ,lkdebug ) |
---|
| 549 | zdistNorth3 = 9999999.9 |
---|
| 550 | IF( lnorth )zdistNorth3 = & |
---|
| 551 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(NorthPoint),pointToCoordF(endingPoint) ,lkdebug ) |
---|
[2849] | 552 | |
---|
[2858] | 553 | zdistEst3 = zdistEst3 + (1-COUNT((/lest/)) )*9999999.9 |
---|
| 554 | zdistWest3 = zdistWest3 + (1-COUNT((/lwest/)) )*9999999.9 |
---|
| 555 | zdistNorth3 = zdistNorth3 + (1-COUNT((/lnorth/)))*9999999.9 |
---|
| 556 | zdistSouth3 = zdistSouth3 + (1-COUNT((/lsouth/)))*9999999.9 |
---|
[2849] | 557 | |
---|
[2858] | 558 | zdistnew = MIN(zdistEst3,zdistWest3,zdistnorth3,zdistSouth3) |
---|
[2849] | 559 | |
---|
[2858] | 560 | ELSE |
---|
[2849] | 561 | |
---|
[2858] | 562 | ! e.2 If no point is selected, select the point which is the closest to end-point |
---|
| 563 | !-------------------------------------------------------------------------------- |
---|
| 564 | l_oldmethod = .TRUE. |
---|
[2849] | 565 | |
---|
[2858] | 566 | !debug |
---|
| 567 | WRITE(cltmp,'(A30,i3.3)' )'SEARCH NEW POINT WITH OLD METHOD: ',jsec |
---|
| 568 | CALL write_debug(jsec,cltmp) |
---|
[2849] | 569 | |
---|
[2947] | 570 | !be careful! we can't go backward. |
---|
[2858] | 571 | zdistNorth = zdistNorth2 ; zdistSouth = zdistSouth2 |
---|
| 572 | zdistEst = zdistEst2 ; zdistWest = zdistWest2 |
---|
[2849] | 573 | |
---|
[2858] | 574 | IF( prevPoint%I .EQ. NorthPoint%I .AND. prevPoint%J .EQ. NorthPoint%J) THEN |
---|
| 575 | zdistnew = MIN(zdistEst,zdistWest,zdistSouth) |
---|
| 576 | ELSE IF(prevPoint%I .EQ. SouthPoint%I .AND. prevPoint%J .EQ. SouthPoint%J) THEN |
---|
| 577 | zdistnew = MIN(zdistEst,zdistWest,zdistNorth) |
---|
| 578 | ELSE IF(prevPoint%I .EQ. WestPoint%I .AND. prevPoint%J .EQ. WestPoint%J ) THEN |
---|
| 579 | zdistnew = MIN(zdistEst,zdistNorth,zdistSouth) |
---|
| 580 | ELSE IF(prevPoint%I .EQ. EstPoint%I .AND. prevPoint%J .EQ. EstPoint%J ) THEN |
---|
| 581 | zdistnew = MIN(zdistWest,zdistNorth,zdistSouth) |
---|
| 582 | ELSE |
---|
| 583 | zdistnew = MIN(zdistEst,zdistWest,zdistNorth,zdistSouth) |
---|
| 584 | ENDIF |
---|
[2849] | 585 | |
---|
[2858] | 586 | ENDIF |
---|
[2849] | 587 | |
---|
[2858] | 588 | !debug |
---|
| 589 | WRITE(cltmp,'(A11, f8.3)')'zdistref = ',zdistref |
---|
| 590 | CALL write_debug(jsec,cltmp) |
---|
| 591 | WRITE(cltmp, 103 )'distance2 :',zdistEst2,zdistWest2,zdistNorth2,zdistSouth2 |
---|
| 592 | CALL write_debug(jsec,cltmp) |
---|
| 593 | WRITE(cltmp, 103 )'distance3 :',zdistEst3,zdistWest3,zdistNorth3,zdistSouth3 |
---|
| 594 | CALL write_debug(jsec,cltmp) |
---|
| 595 | WRITE(cltmp,'(A11, f8.3)')"zdistnew = ",zdistnew |
---|
| 596 | CALL write_debug(jsec,cltmp) |
---|
[2849] | 597 | |
---|
| 598 | 103 FORMAT (A12,"E",f12.3," W",f12.3," N",f12.3," S",f12.3) |
---|
| 599 | |
---|
[2858] | 600 | !f. save next point and direction of velocity. |
---|
| 601 | !--------------------------------------------- |
---|
| 602 | !nextPoint will be the one which is the closest to endingPoint. |
---|
| 603 | !sec%direction will be direction between current point and nextPoint: |
---|
| 604 | !It will be used to compute velocity through the segment [CurrentPoint,nextPoint}: |
---|
| 605 | ! |
---|
| 606 | !A:Current Point NorthPoint(I,J+1) Nextpoint=NorthPoint(I,J+1) => sec%direction=3 |
---|
| 607 | ! | Nextpoint=SouthPoint(I,J-1) => sec%direction=2 |
---|
| 608 | ! | Nextpoint=WestPoint(I-1,J) => sec%direction=0 |
---|
| 609 | ! |==>V(I,J+1) Nextpoint=EastPoint(I+1,J) => sec%direction=1 |
---|
| 610 | ! U(I,J) | U(I+1,J) |
---|
| 611 | ! ^ | ^ |
---|
| 612 | ! West_____|______A_______|_____EstPoint |
---|
| 613 | ! Point |(I,J) (I+1,J) |
---|
| 614 | ! (I-1,J) | |
---|
| 615 | ! |==>V(I,J) |
---|
| 616 | ! | |
---|
| 617 | ! SoutPoint(I,J-1) |
---|
| 618 | IF( l_oldmethod )THEN |
---|
| 619 | IF( zdistnew == zdistWest ) THEN |
---|
| 620 | sec%direction(jseg)=0 ; nextPoint = WestPoint |
---|
| 621 | ELSE IF( zdistnew == zdistEst ) THEN |
---|
| 622 | sec%direction(jseg)=1 ; nextPoint = EstPoint |
---|
| 623 | ELSE IF( zdistnew == zdistSouth )THEN |
---|
| 624 | sec%direction(jseg)=2 ; nextPoint = SouthPoint |
---|
| 625 | ELSE IF( zdistnew == zdistNorth )THEN |
---|
| 626 | sec%direction(jseg)=3 ; nextPoint= NorthPoint |
---|
| 627 | ENDIF |
---|
| 628 | ELSE |
---|
| 629 | IF( zdistnew == zdistWest3 ) THEN |
---|
| 630 | sec%direction(jseg)=0 ; nextPoint = WestPoint |
---|
| 631 | ELSE IF( zdistnew == zdistEst3 ) THEN |
---|
| 632 | sec%direction(jseg)=1 ; nextPoint = EstPoint |
---|
| 633 | ELSE IF( zdistnew == zdistSouth3 )THEN |
---|
| 634 | sec%direction(jseg)=2 ; nextPoint = SouthPoint |
---|
| 635 | ELSE IF( zdistnew == zdistNorth3 )THEN |
---|
| 636 | sec%direction(jseg)=3 ; nextPoint= NorthPoint |
---|
| 637 | ENDIF |
---|
| 638 | ENDIF |
---|
| 639 | |
---|
| 640 | WRITE(cltmp,'(A11, 2(i4.4,1X) )')'nextPoint = ', nextPoint |
---|
| 641 | CALL write_debug(jsec,cltmp) |
---|
[2849] | 642 | |
---|
[2858] | 643 | !f. Save nextPoint and go to nextPoint |
---|
| 644 | !------------------------------------- |
---|
| 645 | prevPoint = sec%listPoint(jseg) |
---|
| 646 | jseg = jseg+1 !increment of number of segments that form the section |
---|
| 647 | sec%listPoint(jseg) = nextPoint !Save next point |
---|
[2849] | 648 | |
---|
[2858] | 649 | ENDIF ! southP/northP/WestP/EstP == endingpoint ? |
---|
[2849] | 650 | |
---|
[2858] | 651 | ENDDO !End of loop on jseg |
---|
| 652 | sec%nb_point = jseg !Save the number of segments that form the section |
---|
[2849] | 653 | |
---|
| 654 | |
---|
[2947] | 655 | ELSE ! isec%nb_point == 0 |
---|
[2858] | 656 | DO jseg=1,nb_point_max |
---|
| 657 | sec%listPoint(:)=POINT_SECTION(0,0) |
---|
| 658 | ENDDO |
---|
| 659 | sec%direction(:)=0. |
---|
| 660 | sec%nb_point = 0 |
---|
[2849] | 661 | ENDIF |
---|
| 662 | |
---|
| 663 | !debug |
---|
[2860] | 664 | IF( sec%nb_point .ne. 0 )THEN |
---|
| 665 | CALL write_debug(jsec,"-------------------------------------") |
---|
| 666 | CALL write_debug(jsec,"list of points in the grid : ") |
---|
| 667 | DO jseg=1,sec%nb_point |
---|
| 668 | ji=sec%listPoint(jseg)%I ; jj=sec%listPoint(jseg)%J |
---|
| 669 | WRITE(cltmp, '(i4.4,X,i4.4,X,i4.4,X,f8.3,X,f8.3)' )jseg,ji,jj,glamf(ji,jj),gphif(ji,jj) |
---|
| 670 | CALL write_debug(jsec,cltmp) |
---|
| 671 | ENDDO |
---|
[2849] | 672 | |
---|
[2947] | 673 | !test if we are an end-point |
---|
[2860] | 674 | IF( sec%listPoint(sec%nb_point)%I .NE. endingPoint%J .AND. sec%listPoint(sec%nb_point)%J .NE. endingPoint%J )THEN |
---|
| 675 | PRINT*,TRIM(sec%name)," NOT ARRIVED TO endingPoint FOR jsec = ",jsec |
---|
| 676 | ENDIF |
---|
[2849] | 677 | ENDIF |
---|
| 678 | |
---|
| 679 | !now compute new slopeSection with ij-coordinates of first and last point |
---|
[2877] | 680 | sec%slopeSection = 0 ! default value |
---|
[2860] | 681 | IF( sec%nb_point .ne. 0 )THEN |
---|
| 682 | IF ( sec%listPoint(sec%nb_point)%I .NE. sec%listPoint(1)%I ) THEN |
---|
| 683 | sec%slopeSection = ( sec%listPoint(sec%nb_point)%J - sec%listPoint(1)%J ) / & |
---|
| 684 | ( sec%listPoint(sec%nb_point)%I - sec%listPoint(1)%I ) |
---|
| 685 | ELSE |
---|
| 686 | sec%slopeSection = 10000._wp |
---|
| 687 | ENDIF |
---|
[2849] | 688 | ENDIF |
---|
| 689 | |
---|
| 690 | END SUBROUTINE compsec |
---|
| 691 | |
---|
| 692 | END MODULE compute_sections |
---|