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Fix a bug in cloud calculation #279

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Aug 4, 2024
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Fix a bug in cloud calculation #279

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1a5e854
fix a bug in cloud calculation
chrislxj Aug 4, 2024
99bb6b7
merge with updates
chrislxj Aug 4, 2024
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146 changes: 75 additions & 71 deletions main/MOD_Forcing.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -525,82 +525,86 @@ SUBROUTINE read_forcing (idate, dir_forcing)
CALL flush_block_data (forc_xy_hgt_t, real(HEIGHT_T,r8))
CALL flush_block_data (forc_xy_hgt_q, real(HEIGHT_Q,r8))

IF (solarin_all_band) THEN

IF (trim(DEF_forcing%dataset) == 'QIAN') THEN
!---------------------------------------------------------------
! 04/2014, yuan: NOTE! codes from CLM4.5-CESM1.2.0
! relationship between incoming NIR or VIS radiation and ratio of
! direct to diffuse radiation calculated based on one year's worth of
! hourly CAM output from CAM version cam3_5_55
!---------------------------------------------------------------
DO iblkme = 1, gblock%nblkme
ib = gblock%xblkme(iblkme)
jb = gblock%yblkme(iblkme)

DO j = 1, gforc%ycnt(jb)
DO i = 1, gforc%xcnt(ib)

hsolar = forc_xy_solarin%blk(ib,jb)%val(i,j)*0.5_R8

! NIR (dir, diff)
ratio_rvrf = min(0.99_R8,max(0.29548_R8 + 0.00504_R8*hsolar &
-1.4957e-05_R8*hsolar**2 + 1.4881e-08_R8*hsolar**3,0.01_R8))
forc_xy_soll %blk(ib,jb)%val(i,j) = ratio_rvrf*hsolar
forc_xy_solld%blk(ib,jb)%val(i,j) = (1._R8 - ratio_rvrf)*hsolar

! VIS (dir, diff)
ratio_rvrf = min(0.99_R8,max(0.17639_R8 + 0.00380_R8*hsolar &
-9.0039e-06_R8*hsolar**2 + 8.1351e-09_R8*hsolar**3,0.01_R8))
forc_xy_sols %blk(ib,jb)%val(i,j) = ratio_rvrf*hsolar
forc_xy_solsd%blk(ib,jb)%val(i,j) = (1._R8 - ratio_rvrf)*hsolar
IF (solarin_all_band) THEN

IF (trim(DEF_forcing%dataset) == 'QIAN') THEN
!---------------------------------------------------------------
! 04/2014, yuan: NOTE! codes from CLM4.5-CESM1.2.0
! relationship between incoming NIR or VIS radiation and ratio of
! direct to diffuse radiation calculated based on one year's worth of
! hourly CAM output from CAM version cam3_5_55
!---------------------------------------------------------------
DO iblkme = 1, gblock%nblkme
ib = gblock%xblkme(iblkme)
jb = gblock%yblkme(iblkme)

DO j = 1, gforc%ycnt(jb)
DO i = 1, gforc%xcnt(ib)

hsolar = forc_xy_solarin%blk(ib,jb)%val(i,j)*0.5_R8

! NIR (dir, diff)
ratio_rvrf = min(0.99_R8,max(0.29548_R8 + 0.00504_R8*hsolar &
-1.4957e-05_R8*hsolar**2 + 1.4881e-08_R8*hsolar**3,0.01_R8))
forc_xy_soll %blk(ib,jb)%val(i,j) = ratio_rvrf*hsolar
forc_xy_solld%blk(ib,jb)%val(i,j) = (1._R8 - ratio_rvrf)*hsolar

! VIS (dir, diff)
ratio_rvrf = min(0.99_R8,max(0.17639_R8 + 0.00380_R8*hsolar &
-9.0039e-06_R8*hsolar**2 + 8.1351e-09_R8*hsolar**3,0.01_R8))
forc_xy_sols %blk(ib,jb)%val(i,j) = ratio_rvrf*hsolar
forc_xy_solsd%blk(ib,jb)%val(i,j) = (1._R8 - ratio_rvrf)*hsolar

ENDDO
ENDDO
ENDDO
ENDDO
ENDDO

ELSE
!---------------------------------------------------------------
! as the downward solar is in full band, an empirical expression
! will be used to divide fractions of band and incident
! (visible, near-infrad, dirct, diffuse)
! Julian calday (1.xx to 365.xx)
!---------------------------------------------------------------
DO iblkme = 1, gblock%nblkme
ib = gblock%xblkme(iblkme)
jb = gblock%yblkme(iblkme)

DO j = 1, gforc%ycnt(jb)
DO i = 1, gforc%xcnt(ib)

ilat = gforc%ydsp(jb) + j
ilon = gforc%xdsp(ib) + i
IF (ilon > gforc%nlon) ilon = ilon - gforc%nlon

a = forc_xy_solarin%blk(ib,jb)%val(i,j)
calday = calendarday(idate)
sunang = orb_coszen (calday, gforc%rlon(ilon), gforc%rlat(ilat))

cloud = (1160.*sunang-a)/(963.*sunang)
cloud = max(cloud,0.)
cloud = min(cloud,1.)
cloud = max(0.58,cloud)

difrat = 0.0604/(sunang-0.0223)+0.0683
IF(difrat.lt.0.) difrat = 0.
IF(difrat.gt.1.) difrat = 1.

difrat = difrat+(1.0-difrat)*cloud
vnrat = (580.-cloud*464.)/((580.-cloud*499.)+(580.-cloud*464.))

forc_xy_sols %blk(ib,jb)%val(i,j) = a*(1.0-difrat)*vnrat
forc_xy_soll %blk(ib,jb)%val(i,j) = a*(1.0-difrat)*(1.0-vnrat)
forc_xy_solsd%blk(ib,jb)%val(i,j) = a*difrat*vnrat
forc_xy_solld%blk(ib,jb)%val(i,j) = a*difrat*(1.0-vnrat)
ELSE
!---------------------------------------------------------------
! as the downward solar is in full band, an empirical expression
! will be used to divide fractions of band and incident
! (visible, near-infrad, dirct, diffuse)
! Julian calday (1.xx to 365.xx)
!---------------------------------------------------------------
DO iblkme = 1, gblock%nblkme
ib = gblock%xblkme(iblkme)
jb = gblock%yblkme(iblkme)

DO j = 1, gforc%ycnt(jb)
DO i = 1, gforc%xcnt(ib)

ilat = gforc%ydsp(jb) + j
ilon = gforc%xdsp(ib) + i
IF (ilon > gforc%nlon) ilon = ilon - gforc%nlon

a = forc_xy_solarin%blk(ib,jb)%val(i,j)
calday = calendarday(idate)
sunang = orb_coszen (calday, gforc%rlon(ilon), gforc%rlat(ilat))

IF (sunang .eq. 0)THEN
cloud = 0.
ELSE
cloud = (1160.*sunang-a)/(963.*sunang)
END IF
cloud = max(cloud,0.)
cloud = min(cloud,1.)
cloud = max(0.58,cloud)

difrat = 0.0604/(sunang-0.0223)+0.0683
IF(difrat.lt.0.) difrat = 0.
IF(difrat.gt.1.) difrat = 1.

difrat = difrat+(1.0-difrat)*cloud
vnrat = (580.-cloud*464.)/((580.-cloud*499.)+(580.-cloud*464.))

forc_xy_sols %blk(ib,jb)%val(i,j) = a*(1.0-difrat)*vnrat
forc_xy_soll %blk(ib,jb)%val(i,j) = a*(1.0-difrat)*(1.0-vnrat)
forc_xy_solsd%blk(ib,jb)%val(i,j) = a*difrat*vnrat
forc_xy_solld%blk(ib,jb)%val(i,j) = a*difrat*(1.0-vnrat)
ENDDO
ENDDO
ENDDO
ENDDO
ENDIF
ENDIF
ENDIF

! [GET ATMOSPHERE CO2 CONCENTRATION DATA]
Expand Down
2 changes: 1 addition & 1 deletion main/MOD_LeafTemperature.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -203,7 +203,7 @@ SUBROUTINE LeafTemperature ( &
t_precip, &! snowfall/rainfall temperature [kelvin]
qintr_rain, &! rainfall interception (mm h2o/s)
qintr_snow, &! snowfall interception (mm h2o/s)
smp (1:nl_soil), &! precipitation sensible heat from canopy
smp (1:nl_soil), &! soil matrix potential
rootfr (1:nl_soil), &! root fraction
hksati (1:nl_soil), &! hydraulic conductivity at saturation [mm h2o/s]
hk (1:nl_soil) ! soil hydraulic conducatance
Expand Down
2 changes: 1 addition & 1 deletion main/MOD_PlantHydraulic.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ SUBROUTINE PlantHydraulicStress_twoleaf (nl_soil ,nvegwcs ,z_soi ,&
cintsha ! scaling up from shaded leaf to canopy

real(r8),intent(in), dimension(nl_soil) :: &
smp, &! precipitation sensible heat from canopy
smp, &! soil matrix potential
rootfr, &! root fraction
hksati, &! hydraulic conductivity at saturation [mm h2o/s]
hk ! soil hydraulic conducatance [mm h2o/s]
Expand Down