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sox_cldaero_mod.F90
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sox_cldaero_mod.F90
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!----------------------------------------------------------------------------------
! Modal aerosol implementation
!----------------------------------------------------------------------------------
module sox_cldaero_mod
use shr_kind_mod, only : r8 => shr_kind_r8
use cam_abortutils, only : endrun
use ppgrid, only : pcols, pver
use mo_chem_utls, only : get_spc_ndx
use cldaero_mod, only : cldaero_conc_t, cldaero_allocate, cldaero_deallocate
use modal_aero_data, only : ntot_amode, modeptr_accum, lptr_so4_cw_amode, lptr_msa_cw_amode
use modal_aero_data, only : numptrcw_amode, lptr_nh4_cw_amode
use modal_aero_data, only : cnst_name_cw, specmw_so4_amode
use cam_history, only : outfld
use cam_history, only : addfld, add_default, phys_decomp
use chem_mods, only : adv_mass
use physconst, only : gravit
use phys_control, only : phys_getopts
use cldaero_mod, only : cldaero_uptakerate
use chem_mods, only : gas_pcnst
implicit none
private
public :: sox_cldaero_init
public :: sox_cldaero_create_obj
public :: sox_cldaero_update
public :: sox_cldaero_destroy_obj
integer :: id_msa, id_h2so4, id_so2, id_h2o2, id_nh3
real(r8), parameter :: small_value = 1.e-20_r8
contains
!----------------------------------------------------------------------------------
!----------------------------------------------------------------------------------
subroutine sox_cldaero_init
integer :: l, m
logical :: history_aerosol ! Output the MAM aerosol tendencies
id_msa = get_spc_ndx( 'MSA' )
id_h2so4 = get_spc_ndx( 'H2SO4' )
id_so2 = get_spc_ndx( 'SO2' )
id_h2o2 = get_spc_ndx( 'H2O2' )
id_nh3 = get_spc_ndx( 'NH3' )
if (id_h2so4<1 .or. id_so2<1 .or. id_h2o2<1) then
call endrun('sox_cldaero_init:MAM mech does not include necessary species' &
//' -- should not invoke sox_cldaero_mod ')
endif
call phys_getopts( history_aerosol_out = history_aerosol )
!
! add to history
!
do m = 1, ntot_amode
l = lptr_so4_cw_amode(m)
if (l > 0) then
call addfld (&
trim(cnst_name_cw(l))//'AQSO4','kg/m2/s ',1, 'A', &
trim(cnst_name_cw(l))//' aqueous phase chemistry',phys_decomp)
call addfld (&
trim(cnst_name_cw(l))//'AQH2SO4','kg/m2/s ',1, 'A', &
trim(cnst_name_cw(l))//' aqueous phase chemistry',phys_decomp)
if ( history_aerosol ) then
call add_default (trim(cnst_name_cw(l))//'AQSO4', 1, ' ')
call add_default (trim(cnst_name_cw(l))//'AQH2SO4', 1, ' ')
endif
end if
end do
call addfld ('AQSO4_H2O2','kg/m2/s ',1, 'A', &
'SO4 aqueous phase chemistry due to H2O2',phys_decomp)
call addfld ('AQSO4_O3','kg/m2/s ',1, 'A', &
'SO4 aqueous phase chemistry due to O3',phys_decomp)
if ( history_aerosol ) then
call add_default ('AQSO4_H2O2', 1, ' ')
call add_default ('AQSO4_O3', 1, ' ')
endif
end subroutine sox_cldaero_init
!----------------------------------------------------------------------------------
!----------------------------------------------------------------------------------
function sox_cldaero_create_obj(cldfrc, qcw, lwc, cfact, ncol, loffset) result( conc_obj )
real(r8), intent(in) :: cldfrc(:,:)
real(r8), intent(in) :: qcw(:,:,:)
real(r8), intent(in) :: lwc(:,:)
real(r8), intent(in) :: cfact(:,:)
integer, intent(in) :: ncol
integer, intent(in) :: loffset
type(cldaero_conc_t), pointer :: conc_obj
integer :: id_so4_1a, id_so4_2a, id_so4_3a, id_so4_4a, id_so4_5a, id_so4_6a
integer :: id_nh4_1a, id_nh4_2a, id_nh4_3a, id_nh4_4a, id_nh4_5a, id_nh4_6a
! added by kzm
integer :: id_so4_7a,id_so4_8a
integer :: id_nh4_7a,id_nh4_8a
!------------
integer :: l,n
integer :: i,k
logical :: mode7, mode9
mode7 = ntot_amode == 7
! added by kzm
mode9 = ntot_amode == 9
!---------
conc_obj => cldaero_allocate()
do k = 1,pver
do i = 1,ncol
if( cldfrc(i,k) >0._r8) then
conc_obj%xlwc(i,k) = lwc(i,k) *cfact(i,k) ! cloud water L(water)/L(air)
conc_obj%xlwc(i,k) = conc_obj%xlwc(i,k) / cldfrc(i,k) ! liquid water in the cloudy fraction of cell
else
conc_obj%xlwc(i,k) = 0._r8
endif
enddo
enddo
conc_obj%no3c(:,:) = 0._r8
if (mode7) then
#if ( defined MODAL_AERO_7MODE )
!put ifdef here so ifort will compile
id_so4_1a = lptr_so4_cw_amode(1) - loffset
id_so4_2a = lptr_so4_cw_amode(2) - loffset
id_so4_3a = lptr_so4_cw_amode(4) - loffset
id_so4_4a = lptr_so4_cw_amode(5) - loffset
id_so4_5a = lptr_so4_cw_amode(6) - loffset
id_so4_6a = lptr_so4_cw_amode(7) - loffset
id_nh4_1a = lptr_nh4_cw_amode(1) - loffset
id_nh4_2a = lptr_nh4_cw_amode(2) - loffset
id_nh4_3a = lptr_nh4_cw_amode(4) - loffset
id_nh4_4a = lptr_nh4_cw_amode(5) - loffset
id_nh4_5a = lptr_nh4_cw_amode(6) - loffset
id_nh4_6a = lptr_nh4_cw_amode(7) - loffset
#endif
conc_obj%so4c(:ncol,:) &
= qcw(:ncol,:,id_so4_1a) &
+ qcw(:ncol,:,id_so4_2a) &
+ qcw(:ncol,:,id_so4_3a) &
+ qcw(:ncol,:,id_so4_4a) &
+ qcw(:ncol,:,id_so4_5a) &
+ qcw(:ncol,:,id_so4_6a)
conc_obj%nh4c(:ncol,:) &
= qcw(:ncol,:,id_nh4_1a) &
+ qcw(:ncol,:,id_nh4_2a) &
+ qcw(:ncol,:,id_nh4_3a) &
+ qcw(:ncol,:,id_nh4_4a) &
+ qcw(:ncol,:,id_nh4_5a) &
+ qcw(:ncol,:,id_nh4_6a)
! added by kzm
elseif (mode9) then
#if (defined MODAL_AERO_9MODE)
id_so4_1a = lptr_so4_cw_amode(1) - loffset
id_so4_2a = lptr_so4_cw_amode(2) - loffset
id_so4_3a = lptr_so4_cw_amode(4) - loffset
id_so4_4a = lptr_so4_cw_amode(5) - loffset
id_so4_5a = lptr_so4_cw_amode(6) - loffset
id_so4_6a = lptr_so4_cw_amode(7) - loffset
id_so4_7a = lptr_so4_cw_amode(8) - loffset
id_so4_8a = lptr_so4_cw_amode(9) - loffset
id_nh4_1a = lptr_nh4_cw_amode(1) - loffset
id_nh4_2a = lptr_nh4_cw_amode(2) - loffset
id_nh4_3a = lptr_nh4_cw_amode(4) - loffset
id_nh4_4a = lptr_nh4_cw_amode(5) - loffset
id_nh4_5a = lptr_nh4_cw_amode(6) - loffset
id_nh4_6a = lptr_nh4_cw_amode(7) - loffset
id_nh4_7a = lptr_nh4_cw_amode(8) - loffset
id_nh4_8a = lptr_nh4_cw_amode(9) - loffset
#endif
conc_obj%so4c(:ncol,:) &
= qcw(:ncol,:,id_so4_1a) &
+ qcw(:ncol,:,id_so4_2a) &
+ qcw(:ncol,:,id_so4_3a) &
+ qcw(:ncol,:,id_so4_4a) &
+ qcw(:ncol,:,id_so4_5a) &
+ qcw(:ncol,:,id_so4_6a) &
+ qcw(:ncol,:,id_so4_7a) &
+ qcw(:ncol,:,id_so4_8a)
conc_obj%nh4c(:ncol,:) &
= qcw(:ncol,:,id_nh4_1a) &
+ qcw(:ncol,:,id_nh4_2a) &
+ qcw(:ncol,:,id_nh4_3a) &
+ qcw(:ncol,:,id_nh4_4a) &
+ qcw(:ncol,:,id_nh4_5a) &
+ qcw(:ncol,:,id_nh4_6a) &
+ qcw(:ncol,:,id_nh4_7a) &
+ qcw(:ncol,:,id_nh4_8a)
!---------------
else
id_so4_1a = lptr_so4_cw_amode(1) - loffset
id_so4_2a = lptr_so4_cw_amode(2) - loffset
id_so4_3a = lptr_so4_cw_amode(3) - loffset
conc_obj%so4c(:ncol,:) &
= qcw(:,:,id_so4_1a) &
+ qcw(:,:,id_so4_2a) &
+ qcw(:,:,id_so4_3a)
! for 3-mode, so4 is assumed to be nh4hso4
! the partial neutralization of so4 is handled by using a
! -1 charge (instead of -2) in the electro-neutrality equation
conc_obj%nh4c(:ncol,:) = 0._r8
! with 3-mode, assume so4 is nh4hso4, and so half-neutralized
conc_obj%so4_fact = 1._r8
endif
end function sox_cldaero_create_obj
!----------------------------------------------------------------------------------
! Update the mixing ratios
!----------------------------------------------------------------------------------
subroutine sox_cldaero_update( &
ncol, lchnk, loffset, dtime, mbar, pdel, press, tfld, cldnum, cldfrc, cfact, xlwc, &
delso4_hprxn, xh2so4, xso4, xso4_init, nh3g, hno3g, xnh3, xhno3, xnh4c, xno3c, xmsa, xso2, xh2o2, qcw, qin )
! args
integer, intent(in) :: ncol
integer, intent(in) :: lchnk ! chunk id
integer, intent(in) :: loffset
real(r8), intent(in) :: dtime ! time step (sec)
real(r8), intent(in) :: mbar(:,:) ! mean wet atmospheric mass ( amu )
real(r8), intent(in) :: pdel(:,:)
real(r8), intent(in) :: press(:,:)
real(r8), intent(in) :: tfld(:,:)
real(r8), intent(in) :: cldnum(:,:)
real(r8), intent(in) :: cldfrc(:,:)
real(r8), intent(in) :: cfact(:,:)
real(r8), intent(in) :: xlwc(:,:)
real(r8), intent(in) :: delso4_hprxn(:,:)
real(r8), intent(in) :: xh2so4(:,:)
real(r8), intent(in) :: xso4(:,:)
real(r8), intent(in) :: xso4_init(:,:)
real(r8), intent(in) :: nh3g(:,:)
real(r8), intent(in) :: hno3g(:,:)
real(r8), intent(in) :: xnh3(:,:)
real(r8), intent(in) :: xhno3(:,:)
real(r8), intent(in) :: xnh4c(:,:)
real(r8), intent(in) :: xmsa(:,:)
real(r8), intent(in) :: xso2(:,:)
real(r8), intent(in) :: xh2o2(:,:)
real(r8), intent(in) :: xno3c(:,:)
real(r8), intent(inout) :: qcw(:,:,:) ! cloud-borne aerosol (vmr)
real(r8), intent(inout) :: qin(:,:,:) ! xported species ( vmr )
! local vars ...
real(r8) :: dqdt_aqso4(ncol,pver,gas_pcnst), &
dqdt_aqh2so4(ncol,pver,gas_pcnst), &
dqdt_aqhprxn(ncol,pver), dqdt_aqo3rxn(ncol,pver), &
sflx(1:ncol)
real(r8) :: faqgain_msa(ntot_amode), faqgain_so4(ntot_amode), qnum_c(ntot_amode)
real(r8) :: delso4_o3rxn, &
dso4dt_aqrxn, dso4dt_hprxn, &
dso4dt_gasuptk, dmsadt_gasuptk, &
dmsadt_gasuptk_tomsa, dmsadt_gasuptk_toso4, &
dqdt_aq, dqdt_wr, dqdt
real(r8) :: fwetrem, sumf, uptkrate
real(r8) :: delnh3, delnh4
integer :: l, n, m
integer :: ntot_msa_c
integer :: i,k
real(r8) :: xl
! make sure dqdt is zero initially, for budgets
dqdt_aqso4(:,:,:) = 0.0_r8
dqdt_aqh2so4(:,:,:) = 0.0_r8
dqdt_aqhprxn(:,:) = 0.0_r8
dqdt_aqo3rxn(:,:) = 0.0_r8
lev_loop: do k = 1,pver
col_loop: do i = 1,ncol
cloud: if (cldfrc(i,k) >= 1.0e-5_r8) then
xl = xlwc(i,k) ! / cldfrc(i,k)
IF (XL .ge. 1.e-8_r8) THEN !! WHEN CLOUD IS PRESENTED
delso4_o3rxn = xso4(i,k) - xso4_init(i,k)
if (id_nh3>0) then
delnh3 = nh3g(i,k) - xnh3(i,k)
delnh4 = - delnh3
endif
!-------------------------------------------------------------------------
! compute factors for partitioning aerosol mass gains among modes
! the factors are proportional to the activated particle MR for each
! mode, which is the MR of cloud drops "associated with" the mode
! thus we are assuming the cloud drop size is independent of the
! associated aerosol mode properties (i.e., drops associated with
! Aitken and coarse sea-salt particles are same size)
!
! qnum_c(n) = activated particle number MR for mode n (these are just
! used for partitioning among modes, so don't need to divide by cldfrc)
do n = 1, ntot_amode
qnum_c(n) = 0.0_r8
l = numptrcw_amode(n) - loffset
if (l > 0) qnum_c(n) = max( 0.0_r8, qcw(i,k,l) )
end do
! force qnum_c(n) to be positive for n=modeptr_accum or n=1
n = modeptr_accum
if (n <= 0) n = 1
qnum_c(n) = max( 1.0e-10_r8, qnum_c(n) )
! faqgain_so4(n) = fraction of total so4_c gain going to mode n
! these are proportional to the activated particle MR for each mode
sumf = 0.0_r8
do n = 1, ntot_amode
faqgain_so4(n) = 0.0_r8
if (lptr_so4_cw_amode(n) > 0) then
faqgain_so4(n) = qnum_c(n)
sumf = sumf + faqgain_so4(n)
end if
end do
if (sumf > 0.0_r8) then
do n = 1, ntot_amode
faqgain_so4(n) = faqgain_so4(n) / sumf
end do
end if
! at this point (sumf <= 0.0) only when all the faqgain_so4 are zero
! faqgain_msa(n) = fraction of total msa_c gain going to mode n
ntot_msa_c = 0
sumf = 0.0_r8
do n = 1, ntot_amode
faqgain_msa(n) = 0.0_r8
if (lptr_msa_cw_amode(n) > 0) then
faqgain_msa(n) = qnum_c(n)
ntot_msa_c = ntot_msa_c + 1
end if
sumf = sumf + faqgain_msa(n)
end do
if (sumf > 0.0_r8) then
do n = 1, ntot_amode
faqgain_msa(n) = faqgain_msa(n) / sumf
end do
end if
! at this point (sumf <= 0.0) only when all the faqgain_msa are zero
uptkrate = cldaero_uptakerate( xl, cldnum(i,k), cfact(i,k), cldfrc(i,k), tfld(i,k), press(i,k) )
! average uptake rate over dtime
uptkrate = (1.0_r8 - exp(-min(100._r8,dtime*uptkrate))) / dtime
! dso4dt_gasuptk = so4_c tendency from h2so4 gas uptake (mol/mol/s)
! dmsadt_gasuptk = msa_c tendency from msa gas uptake (mol/mol/s)
dso4dt_gasuptk = xh2so4(i,k) * uptkrate
if (id_msa > 0) then
dmsadt_gasuptk = xmsa(i,k) * uptkrate
else
dmsadt_gasuptk = 0.0_r8
end if
! if no modes have msa aerosol, then "rename" scavenged msa gas to so4
dmsadt_gasuptk_toso4 = 0.0_r8
dmsadt_gasuptk_tomsa = dmsadt_gasuptk
if (ntot_msa_c == 0) then
dmsadt_gasuptk_tomsa = 0.0_r8
dmsadt_gasuptk_toso4 = dmsadt_gasuptk
end if
!-----------------------------------------------------------------------
! now compute TMR tendencies
! this includes the above aqueous so2 chemistry AND
! the uptake of highly soluble aerosol precursor gases (h2so4, msa, ...)
! AND the wetremoval of dissolved, unreacted so2 and h2o2
dso4dt_aqrxn = (delso4_o3rxn + delso4_hprxn(i,k)) / dtime
dso4dt_hprxn = delso4_hprxn(i,k) / dtime
! fwetrem = fraction of in-cloud-water material that is wet removed
! fwetrem = max( 0.0_r8, (1.0_r8-exp(-min(100._r8,dtime*clwlrat(i,k)))) )
fwetrem = 0.0_r8 ! don't have so4 & msa wet removal here
! compute TMR tendencies for so4 and msa aerosol-in-cloud-water
do n = 1, ntot_amode
l = lptr_so4_cw_amode(n) - loffset
if (l > 0) then
dqdt_aqso4(i,k,l) = faqgain_so4(n)*dso4dt_aqrxn*cldfrc(i,k)
dqdt_aqh2so4(i,k,l) = faqgain_so4(n)* &
(dso4dt_gasuptk + dmsadt_gasuptk_toso4)*cldfrc(i,k)
dqdt_aq = dqdt_aqso4(i,k,l) + dqdt_aqh2so4(i,k,l)
dqdt_wr = -fwetrem*dqdt_aq
dqdt= dqdt_aq + dqdt_wr
qcw(i,k,l) = qcw(i,k,l) + dqdt*dtime
end if
l = lptr_msa_cw_amode(n) - loffset
if (l > 0) then
dqdt_aq = faqgain_msa(n)*dmsadt_gasuptk_tomsa*cldfrc(i,k)
dqdt_wr = -fwetrem*dqdt_aq
dqdt = dqdt_aq + dqdt_wr
qcw(i,k,l) = qcw(i,k,l) + dqdt*dtime
end if
l = lptr_nh4_cw_amode(n) - loffset
if (l > 0) then
if (delnh4 > 0.0_r8) then
dqdt_aq = faqgain_so4(n)*delnh4/dtime*cldfrc(i,k)
dqdt = dqdt_aq
qcw(i,k,l) = qcw(i,k,l) + dqdt*dtime
else
dqdt = (qcw(i,k,l)/max(xnh4c(i,k),1.0e-35_r8)) &
*delnh4/dtime*cldfrc(i,k)
qcw(i,k,l) = qcw(i,k,l) + dqdt*dtime
endif
end if
end do
! For gas species, tendency includes
! reactive uptake to cloud water that essentially transforms the gas to
! a different species. Wet removal associated with this is applied
! to the "new" species (e.g., so4_c) rather than to the gas.
! wet removal of the unreacted gas that is dissolved in cloud water.
! Need to multiply both these parts by cldfrc
! h2so4 (g) & msa (g)
qin(i,k,id_h2so4) = qin(i,k,id_h2so4) - dso4dt_gasuptk * dtime * cldfrc(i,k)
if (id_msa > 0) qin(i,k,id_msa) = qin(i,k,id_msa) - dmsadt_gasuptk * dtime * cldfrc(i,k)
! so2 -- the first order loss rate for so2 is frso2_c*clwlrat(i,k)
! fwetrem = max( 0.0_r8, (1.0_r8-exp(-min(100._r8,dtime*frso2_c*clwlrat(i,k)))) )
fwetrem = 0.0_r8 ! don't include so2 wet removal here
dqdt_wr = -fwetrem*xso2(i,k)/dtime*cldfrc(i,k)
dqdt_aq = -dso4dt_aqrxn*cldfrc(i,k)
dqdt = dqdt_aq + dqdt_wr
qin(i,k,id_so2) = qin(i,k,id_so2) + dqdt * dtime
! h2o2 -- the first order loss rate for h2o2 is frh2o2_c*clwlrat(i,k)
! fwetrem = max( 0.0_r8, (1.0_r8-exp(-min(100._r8,dtime*frh2o2_c*clwlrat(i,k)))) )
fwetrem = 0.0_r8 ! don't include h2o2 wet removal here
dqdt_wr = -fwetrem*xh2o2(i,k)/dtime*cldfrc(i,k)
dqdt_aq = -dso4dt_hprxn*cldfrc(i,k)
dqdt = dqdt_aq + dqdt_wr
qin(i,k,id_h2o2) = qin(i,k,id_h2o2) + dqdt * dtime
! NH3
if (id_nh3>0) then
dqdt_aq = delnh3/dtime*cldfrc(i,k)
dqdt = dqdt_aq
qin(i,k,id_nh3) = qin(i,k,id_nh3) + dqdt * dtime
endif
! for SO4 from H2O2/O3 budgets
dqdt_aqhprxn(i,k) = dso4dt_hprxn*cldfrc(i,k)
dqdt_aqo3rxn(i,k) = (dso4dt_aqrxn - dso4dt_hprxn)*cldfrc(i,k)
ENDIF !! WHEN CLOUD IS PRESENTED
endif cloud
enddo col_loop
enddo lev_loop
!==============================================================
! ... Update the mixing ratios
!==============================================================
do k = 1,pver
do n = 1, ntot_amode
l = lptr_so4_cw_amode(n) - loffset
if (l > 0) then
qcw(:,k,l) = MAX(qcw(:,k,l), small_value )
end if
l = lptr_msa_cw_amode(n) - loffset
if (l > 0) then
qcw(:,k,l) = MAX(qcw(:,k,l), small_value )
end if
l = lptr_nh4_cw_amode(n) - loffset
if (l > 0) then
qcw(:,k,l) = MAX(qcw(:,k,l), small_value )
end if
end do
qin(:,k,id_so2) = MAX( qin(:,k,id_so2), small_value )
if ( id_nh3 > 0 ) then
qin(:,k,id_nh3) = MAX( qin(:,k,id_nh3), small_value )
endif
end do
! diagnostics
do n = 1, ntot_amode
m = lptr_so4_cw_amode(n)
l = m - loffset
if (l > 0) then
sflx(:)=0._r8
do k=1,pver
do i=1,ncol
sflx(i)=sflx(i)+dqdt_aqso4(i,k,l)*adv_mass(l)/mbar(i,k) &
*pdel(i,k)/gravit ! kg/m2/s
enddo
enddo
call outfld( trim(cnst_name_cw(m))//'AQSO4', sflx(:ncol), ncol, lchnk)
sflx(:)=0._r8
do k=1,pver
do i=1,ncol
sflx(i)=sflx(i)+dqdt_aqh2so4(i,k,l)*adv_mass(l)/mbar(i,k) &
*pdel(i,k)/gravit ! kg/m2/s
enddo
enddo
call outfld( trim(cnst_name_cw(m))//'AQH2SO4', sflx(:ncol), ncol, lchnk)
endif
end do
sflx(:)=0._r8
do k=1,pver
do i=1,ncol
sflx(i)=sflx(i)+dqdt_aqhprxn(i,k)*specmw_so4_amode/mbar(i,k) &
*pdel(i,k)/gravit ! kg SO4 /m2/s
enddo
enddo
call outfld( 'AQSO4_H2O2', sflx(:ncol), ncol, lchnk)
sflx(:)=0._r8
do k=1,pver
do i=1,ncol
sflx(i)=sflx(i)+dqdt_aqo3rxn(i,k)*specmw_so4_amode/mbar(i,k) &
*pdel(i,k)/gravit ! kg SO4 /m2/s
enddo
enddo
call outfld( 'AQSO4_O3', sflx(:ncol), ncol, lchnk)
end subroutine sox_cldaero_update
!----------------------------------------------------------------------------------
!----------------------------------------------------------------------------------
subroutine sox_cldaero_destroy_obj( conc_obj )
type(cldaero_conc_t), pointer :: conc_obj
call cldaero_deallocate( conc_obj )
end subroutine sox_cldaero_destroy_obj
end module sox_cldaero_mod