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Xuesong (Steve)
2018-08-28 00:46:26 -04:00
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! $Id: lai_mod.f,v 1.1 2009/06/09 21:51:52 daven Exp $
MODULE LAI_MOD
!
!******************************************************************************
! Module LAI_MOD reads and stores AVHRR LAI for calculating MEGAN biogenic
! VOC emissions. (dsa, tmf, bmy, 10/20/05, 11/6/08)
!
! Module Variables:
! ============================================================================
! (1 ) ISOLAI (REAL*8 ) : AVHRR LAI data for the current day
! (2 ) MISOLAI (REAL*8 ) : AVHRR LAI data for the current month
! (3 ) NMISOLAI (REAL*8 ) : AVHRR LAI data for the next month
! (4 ) PMISOLAI (REAL*8 ) : AVHRR LAI data for the previous month
! (5 ) DAYS_BTW_M (INTEGER) : days btw the current & previous months for LAI
!
! Module Routines:
! ============================================================================
! (1 ) READISOLAI : Reads monthly AVHRR LAI data
! (2 ) RDISOLAI : Calls READISOLAI and interpolates to daily LAI
! (8 ) INIT_LAI : Allocate and initialize data array
! (9 ) CLEANUP_LAI : Deallocate data array
!
! GEOS-CHEM modules referenced by megan_mod.f
! ============================================================================
! (1 ) bpch2_mod.f : Module w/ routines for binary punch file I/O
! (2 ) error_mod.f : Module w/ I/O error and NaN check routines
! (3 ) transfer_mod.f : Module w/ routines to cast & resize arrays
!
! References:
! ============================================================================
!
! NOTES:
! (1 ) Original code (biogen_em_mod.f) by Dorian Abbot (7/8/03). Updated
! and modified for the standard code by May Fu (11/2004).
! (2 ) MEGAN is currently locked to use AVHRR LAI data.
! The LAVHRRLAI logical switch controls whether the AVHRR LAI data
! is used for the GEIA inventory and dry deposition.
! (3 ) Modifications for 0.5 x 0.667 nested grid. Added routine
! READISOLAI_05x0666 to read finer-resolution data for GEOS-5 nested
! grids. (yxw, dan, bmy, 11/6/08)
!******************************************************************************
!
IMPLICIT NONE
!=================================================================
! MODULE PRIVATE DECLARATIONS -- keep certain internal variables
! and routines from being seen outside "lai_mod.f"
!=================================================================
! PRIVATE module variables
!=================================================================
! MODULE VARIABLES
!=================================================================
REAL*8, ALLOCATABLE :: ISOLAI(:,:)
REAL*8, ALLOCATABLE :: MISOLAI(:,:)
REAL*8, ALLOCATABLE :: NMISOLAI(:,:)
REAL*8, ALLOCATABLE :: PMISOLAI(:,:)
INTEGER :: DAYS_BTW_M
!=================================================================
! MODULE ROUTINES -- follow below the "CONTAINS" statement
!=================================================================
CONTAINS
!------------------------------------------------------------------------------
SUBROUTINE READISOLAI( MM )
!
!******************************************************************************
! Subroutine READISOLAI reads AVHRR LAI data from bpch file for the current
! month, the previous month, and the next month. (dsa, tmf, bmy, 10/18/05)
!
! Arguments as Input:
! ============================================================================
! (1 ) MM (INTEGER) : Current month number (1-12)
!
! NOTES:
! (1 ) Original code (biogen_em_mod.f) by Dorian Abbot (7/8/03). Updated
! and modified for the standard code by May Fu (11/2004).
!******************************************************************************
!
USE BPCH2_MOD, ONLY : GET_TAU0, READ_BPCH2, GET_RES_EXT
USE DIRECTORY_MOD, ONLY : DATA_DIR_1x1
USE REGRID_1x1_MOD, ONLY : DO_REGRID_1x1
USE TRANSFER_MOD, ONLY : TRANSFER_2D
! (lzh,02/01/2015) update regridding
USE REGRID_A2A_MOD, ONLY : DO_REGRID_A2A
IMPLICIT NONE
# include "CMN_SIZE" ! Size parameters
! Arguments
INTEGER, INTENT(IN) :: MM
! Local variables
INTEGER :: I, J, K, INDEX, MMM, PMM, IJLOOP
REAL*4 :: ARRAY(I1x1,J1x1,1)
REAL*8 :: TAU0
CHARACTER(LEN=255) :: FILENAME
! (lzh, 02/01/2015)
CHARACTER(LEN=255) :: LLFILENAME
REAL*8 :: INGRID(I1x1,J1x1)
REAL*8 :: OUTGRID(IIPAR,JJPAR)
!=================================================================
! READISOLAI begins here!
!=================================================================
! Zero arrays
MISOLAI = 0.d0
NMISOLAI = 0.d0
ARRAY = 0.d0
!------------------------------------
! Read current month's lai at (I,J)
!------------------------------------
! Filename
FILENAME = TRIM( DATA_DIR_1x1 ) //
& 'leaf_area_index_200412/avhrrlai.global.geos.1x1.2000'
! Echo info
WRITE( 6, 100 ) TRIM( FILENAME )
100 FORMAT( ' - READISOLAI: Reading ', a )
! Get TAU0 value
TAU0 = GET_TAU0( MM, 1, 2000 )
! Read 1x1 LAI data [cm2/cm2]
CALL READ_BPCH2( FILENAME, 'AVHRR', 1,
& TAU0, I1x1, J1x1,
& 1, ARRAY, QUIET=.TRUE. )
! Regrid from 1x1 to current grid resolution
!CALL DO_REGRID_1x1( 'cm2/cm2', ARRAY, MISOLAI )
! (lzh, 02/01/2015)
! File with lat/lon edges for regridding
LLFILENAME = TRIM( DATA_DIR_1x1) //
& 'MAP_A2A_Regrid_201203/latlon_geos1x1_new.txt'
INGRID = ARRAY(:,:,1)
CALL DO_REGRID_A2A( LLFILENAME, I1x1, J1x1,
& INGRID, OUTGRID, IS_MASS=0 )
MISOLAI = OUTGRID
!------------------------------------
! Read next month's lai at (I,J)
!------------------------------------
! MMM is next month
MMM = MM + 1
IF ( MMM == 13 ) MMM = 1
! TAU0 for 1st day of next month
TAU0 = GET_TAU0( MMM, 1, 2000 )
! Read data
CALL READ_BPCH2( FILENAME, 'AVHRR', 1,
& TAU0, I1x1, J1x1,
& 1, ARRAY, QUIET=.TRUE. )
! Regrid from 1x1 to current grid resolution
!CALL DO_REGRID_1x1( 'cm2/cm2', ARRAY, NMISOLAI )
! (lzh, 02/01/2015)
INGRID = ARRAY(:,:,1)
CALL DO_REGRID_A2A( LLFILENAME, I1x1, J1x1,
& INGRID, OUTGRID, IS_MASS=0 )
NMISOLAI = OUTGRID
!------------------------------------
! Read previous month's lai at (I,J)
!------------------------------------
! PMM is previous month
PMM = MM - 1
IF ( PMM == 0 ) PMM = 12
! TAU0 for 1st day of previous month
TAU0 = GET_TAU0( PMM, 1, 2000 )
! Read data
CALL READ_BPCH2( FILENAME, 'AVHRR', 1,
& TAU0, I1x1, J1x1,
& 1, ARRAY, QUIET=.TRUE. )
! Regrid from 1x1 to current grid resolution
!CALL DO_REGRID_1x1( 'cm2/cm2', ARRAY, PMISOLAI )
! (lzh, 02/01/2015)
INGRID = ARRAY(:,:,1)
CALL DO_REGRID_A2A( LLFILENAME, I1x1, J1x1,
& INGRID, OUTGRID, IS_MASS=0 )
PMISOLAI = OUTGRID
! Return to calling program
END SUBROUTINE READISOLAI
!------------------------------------------------------------------------------
SUBROUTINE READISOLAI_05x0666( MM )
!
!******************************************************************************
! Subroutine READISOLAI reads AVHRR LAI data from bpch file for the current
! month, the previous month, and the next month. Specially constructed to
! read hi-res data for the GEOS-5 0.5 x 0.666 nested grid simulations.
! (yxw, bmy, dan, 11/6/08)
!
! Arguments as Input:
! ============================================================================
! (1 ) MM (INTEGER) : Current month number (1-12)
!
! NOTES:
!******************************************************************************
!
! Modules
USE BPCH2_MOD, ONLY : GET_TAU0, READ_BPCH2, GET_RES_EXT
USE DIRECTORY_MOD, ONLY : DATA_DIR_1x1
USE TRANSFER_MOD, ONLY : TRANSFER_2D
USE DIRECTORY_MOD, ONLY : DATA_DIR
IMPLICIT NONE
# include "CMN_SIZE" ! Size parameters
! Arguments
INTEGER, INTENT(IN) :: MM
! Local variables
INTEGER :: I, J, K, INDEX, MMM, PMM, IJLOOP
REAL*4 :: ARRAY(IGLOB,JGLOB,1)
REAL*8 :: TAU0
CHARACTER(LEN=255) :: FILENAME
!=================================================================
! READISOLAI begins here!
!=================================================================
! Zero arrays
MISOLAI = 0.d0
NMISOLAI = 0.d0
ARRAY = 0.d0
!------------------------------------
! Read current month's lai at (I,J)
!------------------------------------
! Filename
FILENAME = TRIM( DATA_DIR ) //
& 'leaf_area_index_200412/avhrrlai.global.geos.05x0666.2000'
! Echo info
WRITE( 6, 100 ) TRIM( FILENAME )
100 FORMAT( ' - READISOLAI: Reading ', a )
! Get TAU0 value
TAU0 = GET_TAU0( MM, 1, 2000 )
! Read 1x1 LAI data [cm2/cm2]
CALL READ_BPCH2( FILENAME, 'AVHRR', 1,
& TAU0, IGLOB, JGLOB,
& 1, ARRAY, QUIET=.TRUE. )
CALL TRANSFER_2D( ARRAY(:,:,1), MISOLAI )
!------------------------------------
! Read next month's lai at (I,J)
!------------------------------------
! MMM is next month
MMM = MM + 1
IF ( MMM == 13 ) MMM = 1
! TAU0 for 1st day of next month
TAU0 = GET_TAU0( MMM, 1, 2000 )
! Read data
CALL READ_BPCH2( FILENAME, 'AVHRR', 1,
& TAU0, IGLOB, JGLOB,
& 1, ARRAY, QUIET=.TRUE. )
CALL TRANSFER_2D( ARRAY(:,:,1), NMISOLAI )
!------------------------------------
! Read previous month's lai at (I,J)
!------------------------------------
! PMM is previous month
PMM = MM - 1
IF ( PMM == 0 ) PMM = 12
! TAU0 for 1st day of previous month
TAU0 = GET_TAU0( PMM, 1, 2000 )
! Read data
CALL READ_BPCH2( FILENAME, 'AVHRR', 1,
& TAU0, IGLOB, JGLOB,
& 1, ARRAY, QUIET=.TRUE. )
CALL TRANSFER_2D( ARRAY(:,:,1), PMISOLAI )
! Return to calling program
END SUBROUTINE READISOLAI_05x0666
!------------------------------------------------------------------------------
SUBROUTINE RDISOLAI( JDAY, MONTH )
!
!******************************************************************************
! Subroutine RDISOLAI sets ISOLAI daily. The stored monthly LAI are used for
! the middle day in the month and LAIs are interpolated for other days.
! (dsa, tmf, bmy, 10/20/05, 11/6/08)
!
! Arguments as Input:
! ============================================================================
! (1 ) JDAY (INTEGER) : Julian Day
! (2 ) MONTH (INTEGER) : Calendar month JDAY is in.
!
! NOTES:
! (1 ) Original code (biogen_em_mod.f) by Dorian Abbot (7/8/03). Updated
! and modified for the standard code by May Fu (11/2004).
! (2 ) Now call READISOLAI_05x0666 to read hi-res LAI data if we are doing a
! GEOS-5 0.5 x 0.666 nested grid simulation. (yxw, dan, bmy, 11/6/08)
!******************************************************************************
!
! References to F90 modules
USE TIME_MOD, ONLY : ITS_A_LEAPYEAR
# include "CMN_SIZE" ! Size parameters
! Arguments
INTEGER, INTENT(IN) :: JDAY, MONTH
! Local variables
INTEGER :: I, J, IMUL, ITD, IJLOOP, MM
INTEGER, SAVE :: LAST_MM = -1
REAL*8 :: FRACTION
! specify midmonth day for year 2000
INTEGER, PARAMETER :: STARTDAY(13) =
& (/ 15, 45, 74, 105, 135, 166,
& 196, 227, 258, 288, 319, 349, 380/)
!=================================================================
! RDISOLAI begins here!
!=================================================================
! Find the month if we index by midmonth
CALL FINDMON( JDAY, MONTH, MM, STARTDAY )
! Read new data if it's a new LAI month
IF ( MM /= LAST_MM ) THEN
#if defined( GRID05x0666 )
CALL READISOLAI_05x0666( MM ) ! GEOS-5 nested grid simulation
#else
CALL READISOLAI( MM ) ! Global simulations
#endif
! Save for next month
LAST_MM = MM
ENDIF
! IMUL is days since midmonth
! ITD is days between midmonths
IF ( JDAY < STARTDAY(1) ) THEN
IMUL = 365 + JDAY - STARTDAY(12)
ITD = 31
ELSE
IMUL = JDAY - STARTDAY(MM)
ITD = STARTDAY(MM+1) - STARTDAY(MM)
END IF
! Archive the days between midmonths in the LAI data
DAYS_BTW_M = ITD
! Fraction of the LAI month that we are in
FRACTION = DBLE( IMUL ) / DBLE( ITD )
! Interpolate to daily LAI value
DO J = 1, JJPAR
DO I = 1, IIPAR
ISOLAI(I,J) = MISOLAI(I,J) +
& ( FRACTION * ( NMISOLAI(I,J) - MISOLAI(I,J) ) )
ENDDO
ENDDO
! Return to calling program
END SUBROUTINE RDISOLAI
!------------------------------------------------------------------------------
SUBROUTINE INIT_LAI
!
!******************************************************************************
! Subroutine INIT_ISOLAI allocates and initializes arrays for AVHRR LAI.
! (dsa, tmf, 7/8/03, 11/20/04)
!
! NOTES:
!******************************************************************************
!
! References to F90 modules
USE ERROR_MOD, ONLY : ALLOC_ERR
# include "CMN_SIZE" ! Size parameters
! Local Variables
INTEGER :: AS
!=================================================================
! INIT_ISOLAI begins here!
!=================================================================
ALLOCATE( ISOLAI( IIPAR, JJPAR ), STAT=AS )
IF ( AS /= 0 ) CALL ALLOC_ERR( 'ISOLAI' )
ISOLAI = 0d0
ALLOCATE( MISOLAI( IIPAR, JJPAR ), STAT=AS )
IF ( AS /= 0 ) CALL ALLOC_ERR( 'MISOLAI' )
MISOLAI = 0d0
ALLOCATE( NMISOLAI( IIPAR, JJPAR ), STAT=AS )
IF ( AS /= 0 ) CALL ALLOC_ERR( 'NMISOLAI' )
NMISOLAI = 0d0
ALLOCATE( PMISOLAI( IIPAR, JJPAR ), STAT=AS )
IF ( AS /= 0 ) CALL ALLOC_ERR( 'PMISOLAI' )
PMISOLAI = 0d0
! Return to calling program
END SUBROUTINE INIT_LAI
!------------------------------------------------------------------------------
SUBROUTINE CLEANUP_LAI
!
!******************************************************************************
! Subroutine CLEANUP_ISOLAI deallocates all allocated arrays at the
! end of a GEOS-CHEM model run. (dsa 7/8/03)
!
! NOTES:
!******************************************************************************
!
!=================================================================
! CLEANUP_ISOLAI begins here!
!=================================================================
IF ( ALLOCATED( ISOLAI ) ) DEALLOCATE( ISOLAI )
IF ( ALLOCATED( MISOLAI ) ) DEALLOCATE( MISOLAI )
IF ( ALLOCATED( NMISOLAI ) ) DEALLOCATE( NMISOLAI )
IF ( ALLOCATED( PMISOLAI ) ) DEALLOCATE( PMISOLAI )
! Return to calling program
END SUBROUTINE CLEANUP_LAI
!------------------------------------------------------------------------------
! End of module
END MODULE LAI_MOD