Fortran读取反演数据

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最新推荐文章于 2024-10-22 12:33:33 发布

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本文链接：https://blog.youkuaiyun.com/qq_40256777/article/details/129655491

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该程序主要功能是读取名为E1.nc的NetCDF文件，提取其中的ISOP,XLAT,XLONG等变量数据。首先打开文件，然后查询并获取维度south_north和west_east的ID及其长度，接着分配内存给数据数组并读取变量值。最后，关闭文件并打印部分数据。

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!read my inversion file and to come in CMAQ compute!
program main 
    USE netcdf
    implicit none 
    integer:: status, fidA, south_north, west_east, ISOP, XLAT, XLONG
    integer:: nx, ny, nt
    real   , dimension(:,:) , allocatable :: t2m
    real   , dimension(:,:)   , allocatable :: lat, lon
    CHARACTER(LEN=100) :: file_in
    file_in  = 'E1.nc'
    !----------------------------------------------------------------
    ! 打开文件 :
    status = NF90_OPEN(TRIM(file_in),0,fidA)
    call erreur(status,.TRUE.,"read_A")
    
    !- read ID of dimensions of interest and save them in-----------------
    ! 获取维度变量ID
    status = NF90_INQ_DIMID(fidA,"west_east",XLAT)
    call erreur(status,.TRUE.,"inq_west_east")

    status = NF90_INQ_DIMID(fidA,"south_north",XLONG)
    call erreur(status,.TRUE.,"inq_south_north")

    ! 获取维度的值:
    status = NF90_INQUIRE_DIMENSION(fidA,XLAT,len=nx)
    call erreur(status,.TRUE.,"inq_dim_XLAT")

    status = NF90_INQUIRE_DIMENSION(fidA,XLONG,len=ny)
    call erreur(status,.TRUE.,"inq_dim_XLONG")

    print*,nx,ny

    !- Allocation of arrays :
    ALLOCATE(  t2m(nx, ny)  )
    ALLOCATE(  lat(nx, ny)  )
    ALLOCATE(  lon(nx, ny)  )

    !- 获取变量ID :
    status = NF90_INQ_VARID(fidA,"ISOP",ISOP)
    call erreur(status,.TRUE.,"inq_ISOP")

    status = NF90_INQ_VARID(fidA,"XLAT",XLAT)
    call erreur(status,.TRUE.,"inq_XLAT")

    status = NF90_INQ_VARID(fidA,"XLONG",XLONG)
    call erreur(status,.TRUE.,"inq_XLONG")

    !- 获取变量值 :
    status = NF90_GET_VAR(fidA,ISOP,t2m)
    call erreur(status,.TRUE.,"getvar_ISOP")
   
    status = NF90_GET_VAR(fidA,XLAT,lat)
    call erreur(status,.TRUE.,"getvar_XLAT")

    status = NF90_GET_VAR(fidA,XLONG,lon)
    call erreur(status,.TRUE.,"getvar_XLONG")

    !- close netcdf file :
    status = NF90_CLOSE(fidA)
    call erreur(status,.TRUE.,"close_A")

    print*,t2m(1:10,1)
    print*,lat(1:10,1)
    print*,lon(1:10,1)
end 

SUBROUTINE erreur(iret, lstop, chaine)
! used to provide clear error messages :
USE netcdf
INTEGER, INTENT(in)                     :: iret
LOGICAL, INTENT(in)                     :: lstop
CHARACTER(LEN=*), INTENT(in)            :: chaine
!
CHARACTER(LEN=80)                       :: message
!
IF ( iret .NE. 0 ) THEN
  WRITE(*,*) 'ROUTINE: ', TRIM(chaine)
  WRITE(*,*) 'ERROR: ', iret
  message=NF90_STRERROR(iret)
  WRITE(*,*) 'WHICH MEANS:',TRIM(message)
  IF ( lstop ) STOP
ENDIF
!
END SUBROUTINE erreur