subroutine SetSolarConst( SolarFlux )


    ! USE statements
    !

    ! ���¹ã�������¼ã�¿å�ºå��
    ! History data output
    !
    use gtool_historyauto, only: HistoryAutoAddVariable, HistoryAutoPut

    ! ���»ç���
    ! Time control
    !
    use timeset, only: TimeN, TimesetClockStart, TimesetClockStop

    ! ��ç³»å�����¼ã�¿ã����¿è¾¼��
    ! Reading time series
    !
    use read_time_series, only: SetValuesFromTimeSeriesWrapper


    real(DP), intent(out):: SolarFlux


    !
    ! Work variables
    !


    ! ������確è�
    ! Initialization check
    !
    if ( .not. set_solarconst_inited ) then
      call MessageNotify( 'E', module_name, 'This module has not been initialized.' )
    end if


    ! �����������
    ! Start measurement of computation time
    !
    call TimesetClockStart( module_name )


    if ( SolarConstFile == '' ) then

      SolarFlux = SolarConst

    else

      call SetValuesFromTimeSeriesWrapper( "SolarConst", SolarConstFile, SolarConstVarName, SolarFlux )

    end if


    call HistoryAutoPut( TimeN, "SolarConst", SolarFlux )


    ! ��������������
    ! Pause measurement of computation time
    !
    call TimesetClockStop( module_name )


  end subroutine SetSolarConst

  subroutine SetSolarConstInit


    ! ���¡ã�¤ã���¥å�ºå��è£���
    ! File I/O support
    !
    use dc_iounit, only: FileOpen

    ! ���¹ã�������¼ã�¿å�ºå��
    ! History data output
    !
    use gtool_historyauto, only: HistoryAutoAddVariable

    ! NAMELIST ���¡ã�¤ã���¥å�����¢ã�������¼ã���£ã������
    ! Utilities for NAMELIST file input
    !
    use namelist_util, only: namelist_filename, NmlutilMsg, NmlutilAryValid


    !
    ! Work variables
    !
    integer:: unit_nml        ! NAMELIST ���¡ã�¤ã�����¼ã���³ç���ç½����.
                              ! Unit number for NAMELIST file open
    integer:: iostat_nml      ! NAMELIST 読ã�¿è¾¼�¿æ���� IOSTAT.
                              ! IOSTAT of NAMELIST read

    ! NAMELIST å¤��°ç¾¤
    ! NAMELIST group name
    !
    namelist /set_solarconst_nml/ SolarConst, SolarConstFile, SolarConstVarName
          !
          ! �����������¤ã���¤ã��������������ç¶� "set_solarconst#SetSolarConstInit"
          ! ���½ã�¼ã�¹ã�³ã�¼ã�������§ã������.
          !
          ! Refer to source codes in the initialization procedure
          ! "set_solarconst#SetSolarConstInit" for the default values.
          !

    if ( set_solarconst_inited ) return


    ! �����������¤ã��¨­å®�
    ! Default values settings
    !

!!$    SolarConst     = 1380.0_DP
    SolarConst        = 1366.0_DP

    SolarConstFile    = ''
    SolarConstVarName = "SolarConst"


    ! NAMELIST ����¿è¾¼��
    ! NAMELIST is input
    !
    if ( trim(namelist_filename) /= '' ) then
      call FileOpen( unit_nml, namelist_filename, mode = 'r' ) ! (in)

      rewind( unit_nml )
      read( unit_nml, nml = set_solarconst_nml, iostat = iostat_nml )             ! (out)
      close( unit_nml )

      call NmlutilMsg( iostat_nml, module_name ) ! (in)
    end if


    call HistoryAutoAddVariable( "SolarConst", (/ 'time' /), "solar constant", 'W m-2' )              ! (in)

    ! �°å� ; Print
    !
    call MessageNotify( 'M', module_name, '----- Initialization Messages -----' )
    call MessageNotify( 'M', module_name, '  SolarConst        = %f', d = (/ SolarConst /) )
    call MessageNotify( 'M', module_name, '  SolarConstFile    = %c', c1 = trim( SolarConstFile ) )
    call MessageNotify( 'M', module_name, '  SolarConstVarName = %c', c1 = trim( SolarConstVarName ) )
    call MessageNotify( 'M', module_name, '-- version = %c', c1 = trim(version) )

    set_solarconst_inited = .true.

  end subroutine SetSolarConstInit