| 1 | SUBROUTINE redglo |
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| 2 | $ (pzgg, pzgr, kredu, kinip, klon, klat, |
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| 3 | $ kmask, kland, ktronca, pmask, cdmsk) |
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| 4 | C***** |
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| 5 | C ***************************** |
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| 6 | C * OASIS ROUTINE - LEVEL 3 * |
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| 7 | C * ------------- ------- * |
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| 8 | C ***************************** |
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| 9 | C |
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| 10 | C**** *redglo* - Global gaussian grid transformation: reduced --> full grid |
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| 11 | C |
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| 12 | C Purpose: |
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| 13 | C ------- |
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| 14 | C Linear interpolation of field on reduced grid to full grid |
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| 15 | C |
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| 16 | C ***NOTE*** |
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| 17 | C ---------- |
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| 18 | C The flag cdmsk asks for extrapolation or not on the reduced |
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| 19 | C gaussian grid. If cdmsk = SEALAND sea values are extended |
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| 20 | C to continental areas using the reduced grid sea-land mask. |
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| 21 | C If cdmsk = LANDSEA, the opposite is performed. If cdmsk = |
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| 22 | C NOEXTRAP, THEN no extrapolation is performed. |
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| 23 | C |
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| 24 | C** Interface: |
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| 25 | C --------- |
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| 26 | C *CALL* *redglo (pzgg, pzgr, kredu, kinip, klon, klat, |
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| 27 | C kmask, kland, ktronca, pmask) |
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| 28 | C |
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| 29 | C Input: |
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| 30 | C ----- |
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| 31 | C pzgg : field on reduced grid (real 2D) |
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| 32 | C kredu : number of points on reduced grid |
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| 33 | C kinip : number of longitudes per latitude value (integer 1D) |
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| 34 | C klon : number of longitudes of global grid |
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| 35 | C klat : number of latitudes of both grids |
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| 36 | C pmask : reduced grid mask value |
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| 37 | C ktronca : truncature of gaussian grid |
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| 38 | C cdmsk : extrapolation flag |
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| 39 | C |
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| 40 | C Output: |
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| 41 | C ------ |
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| 42 | C pzgg : field on global grid (real 2D) |
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| 43 | C kmask : mask on reduced grid (integer 1D) |
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| 44 | C |
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| 45 | C Workspace: |
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| 46 | C --------- |
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| 47 | C pzgr : work array to store field on reduced grid (real 1D) |
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| 48 | C kland : number of masked points per latitude circle on |
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| 49 | C reduced grid (integer 1D) |
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| 50 | C |
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| 51 | C External: |
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| 52 | C -------- |
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| 53 | C None |
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| 54 | C |
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| 55 | C Reference: |
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| 56 | C --------- |
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| 57 | C See OASIS manual (1995) |
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| 58 | C |
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| 59 | C History: |
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| 60 | C ------- |
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| 61 | C Version Programmer Date Description |
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| 62 | C ------- ---------- ---- ----------- |
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| 63 | C 1.0 L. Terray 94/01/01 created |
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| 64 | C 2.0 L. Terray 95/10/10 modified: new structure |
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| 65 | C 2.1 L. Terray 95/11/11 modified: choice of extrapolation |
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| 66 | C 2.3 S. Valcke 99/03/29 modified: error message for maskr |
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| 67 | C 2.3 S. Valcke 99/04/30 added: printing levels |
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| 68 | C 2.5 S. Valcke 01/03/23 added: nulrd opening |
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| 69 | C 2.5 S. Valcke 01/03/23 added: netCDF maskr files |
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| 70 | C |
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| 71 | C %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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| 72 | C |
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| 73 | C* ---------------- Include files and USE of modules--------------------------- |
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| 74 | C |
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| 75 | USE mod_kinds_oasis |
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| 76 | USE mod_parameter |
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| 77 | USE mod_unitncdf |
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| 78 | USE mod_unit |
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| 79 | USE mod_gauss |
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| 80 | USE mod_printing |
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| 81 | USE mod_label |
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| 82 | INCLUDE 'netcdf.inc' |
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| 83 | C |
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| 84 | C* ---------------------------- Argument declarations ------------------- |
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| 85 | C |
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| 86 | REAL (kind=ip_realwp_p) pzgg(klon,klat), pzgr(klon*klat) |
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| 87 | INTEGER (kind=ip_intwp_p) kmask(kredu), kland(klat), kinip(klat) |
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| 88 | CHARACTER*8 cdmsk |
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| 89 | C |
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| 90 | C* ---------------------------- Local declarations ------------------- |
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| 91 | C |
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| 92 | CHARACTER*8 clname |
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| 93 | INTEGER (kind=ip_intwp_p) il_ncid, il_varid |
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| 94 | C |
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| 95 | C* ---------------------------- Poema verses ---------------------------- |
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| 96 | C |
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| 97 | C %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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| 98 | C |
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| 99 | C* 1. Initialization |
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| 100 | C -------------- |
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| 101 | C |
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| 102 | IF (nlogprt .GE. 2) THEN |
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| 103 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 104 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 105 | WRITE (UNIT = nulou,FMT = *) |
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| 106 | $ ' ROUTINE redglo - Level 3' |
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| 107 | WRITE (UNIT = nulou,FMT = *) |
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| 108 | $ ' ************** *******' |
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| 109 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 110 | WRITE (UNIT = nulou,FMT = *) |
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| 111 | $ ' Go from reduced to global gaussian grid' |
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| 112 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 113 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 114 | ENDIF |
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| 115 | iflag = 0 |
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| 116 | C |
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| 117 | C* Zeroes work array |
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| 118 | C |
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| 119 | CALL szero(pzgr,klon*klat) |
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| 120 | C |
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| 121 | C* Zeroes some argument arrays |
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| 122 | C |
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| 123 | CALL izero(kmask,kredu) |
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| 124 | CALL izero(kland,klat) |
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| 125 | zmask = pmask - 1.0 |
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| 126 | C |
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| 127 | C* Open and READ in reduced gaussian grid maskr file |
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| 128 | C |
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| 129 | IF (nlogprt .GE. 1) THEN |
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| 130 | WRITE (UNIT = nulou,FMT = *) |
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| 131 | $ ' opening the reduced gaussian grid mask file ' |
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| 132 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 133 | ENDIF |
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| 134 | WRITE(clname,'(''MSKRD'',I3.3)') ktronca |
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| 135 | IF (lncdfgrd) THEN |
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| 136 | istatus=NF_OPEN(crednam//'.nc', NF_NOWRITE, il_ncid) |
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| 137 | IF (istatus .NE. NF_NOERR) THEN |
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| 138 | WRITE (UNIT = nulou,FMT = *) |
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| 139 | $ ' ===>>>> : error in opening maskr.nc. We STOP!' |
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| 140 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 141 | CALL HALTE('STOP in redglo') |
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| 142 | ENDIF |
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| 143 | C |
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| 144 | istatus=NF_INQ_VARID(il_ncid, clname, il_varid) |
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| 145 | istatus=NF_GET_VARA_INT (il_ncid, il_varid, 1, kredu, kmask) |
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| 146 | IF (istatus .ne. NF_NOERR) THEN |
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| 147 | WRITE (UNIT = nulou,FMT = *) |
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| 148 | $ ' ===>>>> : error in reading variable', clname |
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| 149 | WRITE (UNIT = nulou,FMT = *) |
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| 150 | $ 'in maskr.nc, the reduced grid mask file ' |
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| 151 | WRITE (UNIT = nulou,FMT = *) |
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| 152 | $ 'Note that since version 2.3, the locator for the' |
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| 153 | WRITE (UNIT = nulou,FMT = *) |
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| 154 | $ 'reduced mask has to be MSKRDxxx WHERE xxx' |
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| 155 | WRITE (UNIT = nulou,FMT = *) |
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| 156 | $ 'is half the number of latitude lines.' |
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| 157 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 158 | CALL HALTE('STOP in redglo') |
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| 159 | ENDIF |
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| 160 | CALL hdlerr(NF_CLOSE(il_ncid), 'redglo') |
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| 161 | ELSE |
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| 162 | iunit = nulrd |
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| 163 | OPEN (UNIT = nulrd,FILE = crednam,STATUS='UNKNOWN', |
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| 164 | $ FORM ='UNFORMATTED',ERR = 140,IOSTAT = iost) |
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| 165 | IF (nlogprt .GE. 1) THEN |
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| 166 | WRITE (UNIT = nulou,FMT = 1001) nulrd, crednam |
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| 167 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 168 | ENDIF |
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| 169 | 140 CONTINUE |
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| 170 | C* Formats |
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| 171 | C |
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| 172 | 1001 FORMAT(10X,' open unit = ',I3,' file ',A8,' ok') |
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| 173 | IF (iost .ne. 0) THEN |
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| 174 | WRITE (UNIT = nulou,FMT = *) |
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| 175 | $ ' ===>>>> : error in opening maskr, the red-grid file' |
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| 176 | WRITE (UNIT = nulou,FMT = *) |
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| 177 | $ ' ======= ===== =====' |
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| 178 | WRITE (UNIT = nulou,FMT = *) |
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| 179 | $ ' logical unit ',nulrd,' error number = ', |
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| 180 | $ iost |
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| 181 | WRITE (UNIT = nulou,FMT = *) |
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| 182 | $ ' We STOP. Verify the file ', crednam |
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| 183 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 184 | CALL HALTE('STOP in redglo') |
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| 185 | ENDIF |
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| 186 | C |
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| 187 | CALL locrint(clname, kmask, kredu, iunit, iflag) |
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| 188 | IF (iflag .NE. 0) THEN |
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| 189 | CALL prtout('WARNING: problem in reading unit =', |
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| 190 | $ iunit, 2) |
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| 191 | CALL prcout('Error in reading field linked to string =', |
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| 192 | $ clname, 1) |
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| 193 | WRITE (UNIT = nulou,FMT = *) |
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| 194 | $ 'Note that since version 2.3, the locator for the' |
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| 195 | WRITE (UNIT = nulou,FMT = *) |
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| 196 | $ 'reduced mask has to be MSKRDxxx WHERE xxx' |
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| 197 | WRITE (UNIT = nulou,FMT = *) |
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| 198 | $ 'is half the number of latitude lines.' |
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| 199 | CALL HALTE ('STOP in redglo') |
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| 200 | ENDIF |
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| 201 | ENDIF |
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| 202 | C* Assign reduced grid values to array pzgr |
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| 203 | C |
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| 204 | DO 110 jj = 1, klat |
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| 205 | DO 120 ji = 1, klon |
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| 206 | pzgr(klon*(jj-1)+ji) = pzgg(ji,jj) |
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| 207 | 120 CONTINUE |
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| 208 | 110 CONTINUE |
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| 209 | C |
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| 210 | C* Test if extrapolation is required |
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| 211 | C |
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| 212 | IF (cdmsk .EQ. 'SEALAND' .OR. cdmsk .EQ. 'LANDSEA') THEN |
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| 213 | C |
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| 214 | C |
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| 215 | C* 2. Check if there is any sea point and mask land points |
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| 216 | C ---------------------------------------------------- |
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| 217 | C |
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| 218 | C* First get number of masked points on each latitude circle |
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| 219 | C |
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| 220 | indice = 0 |
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| 221 | C* Extrapolation of land values from sea values, we set mask equal 1 |
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| 222 | IF (cdmsk .EQ. 'SEALAND') imask = 1 |
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| 223 | C* Extrapolation of sea values from land values, we set mask equal 0 |
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| 224 | IF (cdmsk .EQ. 'LANDSEA') imask = 0 |
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| 225 | DO 210 jk = 1, klat |
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| 226 | DO 220 ji = 1, kinip(jk) |
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| 227 | IF (kmask(indice + ji) .EQ. imask) THEN |
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| 228 | kland(jk) = kland(jk) + 1 |
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| 229 | ENDIF |
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| 230 | 220 CONTINUE |
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| 231 | indice = indice + kinip(jk) |
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| 232 | 210 CONTINUE |
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| 233 | C |
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| 234 | C* Then fill up continental or sea values unless all points are land or sea |
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| 235 | C |
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| 236 | indice = 0 |
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| 237 | DO 230 jk = 1, klat |
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| 238 | IF (kland(jk) .EQ. kinip(jk)) GO TO 250 |
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| 239 | DO 240 ji = 1, kinip(jk) |
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| 240 | IF (kmask(indice + ji) .EQ. imask) |
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| 241 | $ pzgr(indice + ji) = pmask |
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| 242 | 240 CONTINUE |
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| 243 | 250 indice = indice + kinip(jk) |
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| 244 | 230 CONTINUE |
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| 245 | C |
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| 246 | C |
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| 247 | C* 3. Assign sea values to land points or land values to sea points |
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| 248 | C ------------------------------------------------------------- |
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| 249 | C |
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| 250 | indice = 0 |
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| 251 | DO 310 jk = 1, klat |
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| 252 | IF (kland(jk) .EQ. kinip(jk)) GOTO 315 |
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| 253 | DO 320 ji = 1, kinip(jk) |
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| 254 | inow = indice + ji |
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| 255 | IF (pzgr(inow) .GT. zmask) THEN |
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| 256 | iinf = indice + 1 |
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| 257 | isup = indice + kinip(jk) |
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| 258 | ieast = inow + 1 |
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| 259 | iwest = inow - 1 |
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| 260 | icont = 0 |
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| 261 | 325 CONTINUE |
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| 262 | IF (ieast .GT. isup) ieast = ieast - kinip(jk) |
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| 263 | IF (iwest .LT. iinf) iwest = iwest + kinip(jk) |
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| 264 | IF (pzgr(ieast) .LT. zmask .and. |
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| 265 | $ pzgr(iwest) .LT. zmask) THEN |
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| 266 | pzgr(inow) = (pzgr(ieast) + pzgr(iwest))/2. |
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| 267 | ELSEIF (pzgr(ieast) .GT. zmask .and. |
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| 268 | $ pzgr(iwest) .LT. zmask) THEN |
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| 269 | pzgr(inow) = pzgr(iwest) |
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| 270 | ELSEIF (pzgr(ieast) .LT. zmask .and. |
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| 271 | $ pzgr(iwest) .GT. zmask) THEN |
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| 272 | pzgr(inow) = pzgr(ieast) |
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| 273 | ELSE |
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| 274 | icont = icont + 1 |
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| 275 | ieast = ieast + 1 |
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| 276 | iwest = iwest - 1 |
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| 277 | if (icont .GT. kinip(jk)) |
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| 278 | $ CALL HALTE ('STOP in redglo') |
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| 279 | GOTO 325 |
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| 280 | ENDIF |
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| 281 | ENDIF |
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| 282 | 320 CONTINUE |
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| 283 | 315 indice = indice + kinip(jk) |
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| 284 | 310 CONTINUE |
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| 285 | C* No extrapolation case |
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| 286 | ELSE IF (cdmsk .EQ. 'NOEXTRAP') THEN |
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| 287 | CONTINUE |
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| 288 | ENDIF |
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| 289 | C |
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| 290 | C |
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| 291 | C* 2. Reduced to full linear interpolation |
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| 292 | C ------------------------------------ |
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| 293 | C |
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| 294 | C* Interpolate from reduced to global |
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| 295 | C |
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| 296 | indice = 0 |
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| 297 | DO 270 jk = 1, klat |
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| 298 | DO 280 ji = 1, klon |
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| 299 | zxi = 1 + ((ji - 1) * kinip(jk)) / FLOAT(klon) |
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| 300 | im = INT(zxi) |
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| 301 | zdx = zxi - im |
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| 302 | im = 1 + MOD(im + kinip(jk) - 1,kinip(jk)) |
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| 303 | ip = 1 + MOD(im,kinip(jk)) |
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| 304 | pzgg(ji,jk) = pzgr(indice + im) * (1.-zdx) |
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| 305 | $ + pzgr(indice + ip) * zdx |
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| 306 | 280 CONTINUE |
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| 307 | indice = indice + kinip(jk) |
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| 308 | 270 CONTINUE |
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| 309 | C |
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| 310 | C |
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| 311 | C* 3. End of routine |
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| 312 | C -------------- |
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| 313 | C |
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| 314 | IF (nlogprt .GE. 2) THEN |
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| 315 | WRITE (UNIT = nulou,FMT = *) ' ' |
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| 316 | WRITE (UNIT = nulou,FMT = *) |
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| 317 | $ ' --------- End of routine redglo ---------' |
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| 318 | CALL FLUSH (nulou) |
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| 319 | ENDIF |
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| 320 | RETURN |
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| 321 | END |
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