#include <misc.h>
#include <params.h>
subroutine trcabn(lchnk ,ncol , & 1,3
k2 ,kn ,ucfc11 ,ucfc12 ,un2o0 , &
un2o1 ,uch4 ,uco211 ,uco212 ,uco213 , &
uco221 ,uco222 ,uco223 ,tbar ,bplnk , &
winpl ,pinpl ,tco2 ,th2o ,to3 , &
uptype ,dw ,s2c ,up2 ,pnew , &
abstrc ,uinpl , &
aer_trn_ngh)
!-----------------------------------------------------------------------
!
! Purpose:
! Calculate nearest layer absorptivity due to CH4, N2O, CFC11 and CFC12
!
! Method:
! Equations in CCM3 description
!
! Author: J. Kiehl
!
!-----------------------------------------------------------------------
!
use shr_kind_mod, only: r8 => shr_kind_r8
use ppgrid
use volcrad
implicit none
#include <crdcon.h>
!------------------------------Arguments--------------------------------
!
! Input arguments
!
integer, intent(in) :: lchnk ! chunk identifier
integer, intent(in) :: ncol ! number of atmospheric columns
integer, intent(in) :: k2 ! level index
integer, intent(in) :: kn ! level index
!
real(r8), intent(in) :: tbar(pcols,4) ! pressure weighted temperature
real(r8), intent(in) :: ucfc11(pcols,pverp) ! CFC11 path length
real(r8), intent(in) :: ucfc12(pcols,pverp) ! CFC12 path length
real(r8), intent(in) :: un2o0(pcols,pverp) ! N2O path length
real(r8), intent(in) :: un2o1(pcols,pverp) ! N2O path length (hot band)
!
real(r8), intent(in) :: uch4(pcols,pverp) ! CH4 path length
real(r8), intent(in) :: uco211(pcols,pverp) ! CO2 9.4 micron band path length
real(r8), intent(in) :: uco212(pcols,pverp) ! CO2 9.4 micron band path length
real(r8), intent(in) :: uco213(pcols,pverp) ! CO2 9.4 micron band path length
real(r8), intent(in) :: uco221(pcols,pverp) ! CO2 10.4 micron band path length
!
real(r8), intent(in) :: uco222(pcols,pverp) ! CO2 10.4 micron band path length
real(r8), intent(in) :: uco223(pcols,pverp) ! CO2 10.4 micron band path length
real(r8), intent(in) :: bplnk(14,pcols,4) ! weighted Planck fnc. for absorptivity
real(r8), intent(in) :: winpl(pcols,4) ! fractional path length
real(r8), intent(in) :: pinpl(pcols,4) ! pressure factor for subdivided layer
!
real(r8), intent(in) :: tco2(pcols) ! co2 transmission
real(r8), intent(in) :: th2o(pcols) ! h2o transmission
real(r8), intent(in) :: to3(pcols) ! o3 transmission
real(r8), intent(in) :: dw(pcols) ! h2o path length
real(r8), intent(in) :: pnew(pcols) ! pressure factor
!
real(r8), intent(in) :: s2c(pcols,pverp) ! h2o continuum factor
real(r8), intent(in) :: uptype(pcols,pverp) ! p-type path length
real(r8), intent(in) :: up2(pcols) ! p squared path length
real(r8), intent(in) :: uinpl(pcols,4) ! Nearest layer subdivision factor
real(r8), intent(in) :: aer_trn_ngh(pcols,bnd_nbr_LW)
! [fraction] Total transmission between
! nearest neighbor sub-levels
!
! Output Arguments
!
real(r8), intent(out) :: abstrc(pcols) ! total trace gas absorptivity
!
!--------------------------Local Variables------------------------------
!
integer i,l ! loop counters
!
real(r8) sqti(pcols) ! square root of mean temp
real(r8) rsqti(pcols) ! reciprocal of sqti
real(r8) du1 ! cfc11 path length
real(r8) du2 ! cfc12 path length
real(r8) acfc1 ! absorptivity of cfc11 798 cm-1 band
!
real(r8) acfc2 ! absorptivity of cfc11 846 cm-1 band
real(r8) acfc3 ! absorptivity of cfc11 933 cm-1 band
real(r8) acfc4 ! absorptivity of cfc11 1085 cm-1 band
real(r8) acfc5 ! absorptivity of cfc11 889 cm-1 band
real(r8) acfc6 ! absorptivity of cfc11 923 cm-1 band
!
real(r8) acfc7 ! absorptivity of cfc11 1102 cm-1 band
real(r8) acfc8 ! absorptivity of cfc11 1161 cm-1 band
real(r8) du01 ! n2o path length
real(r8) dbeta01 ! n2o pressure factors
real(r8) dbeta11 ! "
!
real(r8) an2o1 ! absorptivity of the 1285 cm-1 n2o band
real(r8) du02 ! n2o path length
real(r8) dbeta02 ! n2o pressure factor
real(r8) an2o2 ! absorptivity of the 589 cm-1 n2o band
real(r8) du03 ! n2o path length
!
real(r8) dbeta03 ! n2o pressure factor
real(r8) an2o3 ! absorptivity of the 1168 cm-1 n2o band
real(r8) duch4 ! ch4 path length
real(r8) dbetac ! ch4 pressure factor
real(r8) ach4 ! absorptivity of the 1306 cm-1 ch4 band
!
real(r8) du11 ! co2 path length
real(r8) du12 ! "
real(r8) du13 ! "
real(r8) dbetc1 ! co2 pressure factor
real(r8) dbetc2 ! co2 pressure factor
!
real(r8) aco21 ! absorptivity of the 1064 cm-1 co2 band
real(r8) du21 ! co2 path length
real(r8) du22 ! "
real(r8) du23 ! "
real(r8) aco22 ! absorptivity of the 961 cm-1 co2 band
!
real(r8) tt(pcols) ! temp. factor for h2o overlap
real(r8) psi1 ! "
real(r8) phi1 ! "
real(r8) p1 ! factor for h2o overlap
real(r8) w1 ! "
!
real(r8) ds2c(pcols) ! continuum path length
real(r8) duptyp(pcols) ! p-type path length
real(r8) tw(pcols,6) ! h2o transmission overlap
real(r8) g1(6) ! h2o overlap factor
real(r8) g2(6) ! "
!
real(r8) g3(6) ! "
real(r8) g4(6) ! "
real(r8) ab(6) ! h2o temp. factor
real(r8) bb(6) ! "
real(r8) abp(6) ! "
!
real(r8) bbp(6) ! "
real(r8) tcfc3 ! transmission of cfc11 band
real(r8) tcfc4 ! transmission of cfc11 band
real(r8) tcfc6 ! transmission of cfc12 band
real(r8) tcfc7 ! "
!
real(r8) tcfc8 ! "
real(r8) tlw ! h2o transmission
real(r8) tch4 ! ch4 transmission
!
!--------------------------Data Statements------------------------------
!
data g1 /0.0468556,0.0397454,0.0407664,0.0304380,0.0540398,0.0321962/
data g2 /14.4832,4.30242,5.23523,3.25342,0.698935,16.5599/
data g3 /26.1898,18.4476,15.3633,12.1927,9.14992,8.07092/
data g4 /0.0261782,0.0369516,0.0307266,0.0243854,0.0182932,0.0161418/
data ab /3.0857e-2,2.3524e-2,1.7310e-2,2.6661e-2,2.8074e-2,2.2915e-2/
data bb /-1.3512e-4,-6.8320e-5,-3.2609e-5,-1.0228e-5,-9.5743e-5,-1.0304e-4/
data abp/2.9129e-2,2.4101e-2,1.9821e-2,2.6904e-2,2.9458e-2,1.9892e-2/
data bbp/-1.3139e-4,-5.5688e-5,-4.6380e-5,-8.0362e-5,-1.0115e-4,-8.8061e-5/
!
!--------------------------Statement Functions--------------------------
!
real(r8) func, u, b
func(u,b) = u/sqrt(4.0 + u*(1.0 + 1.0 / b))
!
!------------------------------------------------------------------
!
do i = 1,ncol
sqti(i) = sqrt(tbar(i,kn))
rsqti(i) = 1. / sqti(i)
!
! h2o transmission
!
tt(i) = abs(tbar(i,kn) - 250.0)
ds2c(i) = abs(s2c(i,k2+1) - s2c(i,k2))*uinpl(i,kn)
duptyp(i) = abs(uptype(i,k2+1) - uptype(i,k2))*uinpl(i,kn)
end do
!
do l = 1,6
do i = 1,ncol
psi1 = exp(abp(l)*tt(i)+bbp(l)*tt(i)*tt(i))
phi1 = exp(ab(l)*tt(i)+bb(l)*tt(i)*tt(i))
p1 = pnew(i) * (psi1/phi1) / sslp
w1 = dw(i) * winpl(i,kn) * phi1
tw(i,l) = exp(- g1(l)*p1*(sqrt(1.0+g2(l)*(w1/p1))-1.0) &
- g3(l)*ds2c(i)-g4(l)*duptyp(i))
end do
end do
!
do i=1,ncol
tw(i,1)=tw(i,1)*(0.7*aer_trn_ngh(i,idx_LW_0650_0800)+&! l=1: 0750--0820 cm-1
0.3*aer_trn_ngh(i,idx_LW_0800_1000))
tw(i,2)=tw(i,2)*aer_trn_ngh(i,idx_LW_0800_1000) ! l=2: 0820--0880 cm-1
tw(i,3)=tw(i,3)*aer_trn_ngh(i,idx_LW_0800_1000) ! l=3: 0880--0900 cm-1
tw(i,4)=tw(i,4)*aer_trn_ngh(i,idx_LW_0800_1000) ! l=4: 0900--1000 cm-1
tw(i,5)=tw(i,5)*aer_trn_ngh(i,idx_LW_1000_1200) ! l=5: 1000--1120 cm-1
tw(i,6)=tw(i,6)*aer_trn_ngh(i,idx_LW_1000_1200) ! l=6: 1120--1170 cm-1
end do ! end loop over lon
do i = 1,ncol
!
du1 = abs(ucfc11(i,k2+1) - ucfc11(i,k2)) * winpl(i,kn)
du2 = abs(ucfc12(i,k2+1) - ucfc12(i,k2)) * winpl(i,kn)
!
! cfc transmissions
!
tcfc3 = exp(-175.005*du1)
tcfc4 = exp(-1202.18*du1)
tcfc6 = exp(-5786.73*du2)
tcfc7 = exp(-2873.51*du2)
tcfc8 = exp(-2085.59*du2)
!
! Absorptivity for CFC11 bands
!
acfc1 = 50.0*(1.0 - exp(-54.09*du1)) * tw(i,1)*bplnk(7,i,kn)
acfc2 = 60.0*(1.0 - exp(-5130.03*du1))*tw(i,2)*bplnk(8,i,kn)
acfc3 = 60.0*(1.0 - tcfc3)*tw(i,4)*tcfc6 * bplnk(9,i,kn)
acfc4 = 100.0*(1.0 - tcfc4)* tw(i,5) * bplnk(10,i,kn)
!
! Absorptivity for CFC12 bands
!
acfc5 = 45.0*(1.0 - exp(-1272.35*du2))*tw(i,3)*bplnk(11,i,kn)
acfc6 = 50.0*(1.0 - tcfc6)*tw(i,4)*bplnk(12,i,kn)
acfc7 = 80.0*(1.0 - tcfc7)* tw(i,5)*tcfc4 *bplnk(13,i,kn)
acfc8 = 70.0*(1.0 - tcfc8)*tw(i,6)*bplnk(14,i,kn)
!
! Absorptivity for CH4 band 1306 cm-1
!
tlw = exp(-1.0*sqrt(up2(i)))
tlw=tlw*aer_trn_ngh(i,idx_LW_1200_2000)
duch4 = abs(uch4(i,k2+1) - uch4(i,k2)) * winpl(i,kn)
dbetac = 2.94449 * pinpl(i,kn) * rsqti(i) / sslp
ach4 = 6.00444*sqti(i)*log(1.0 + func(duch4,dbetac)) * tlw * bplnk(3,i,kn)
tch4 = 1.0/(1.0 + 0.02*func(duch4,dbetac))
!
! Absorptivity for N2O bands
!
du01 = abs(un2o0(i,k2+1) - un2o0(i,k2)) * winpl(i,kn)
du11 = abs(un2o1(i,k2+1) - un2o1(i,k2)) * winpl(i,kn)
dbeta01 = 19.399 * pinpl(i,kn) * rsqti(i) / sslp
dbeta11 = dbeta01
!
! 1285 cm-1 band
!
an2o1 = 2.35558*sqti(i)*log(1.0 + func(du01,dbeta01) &
+ func(du11,dbeta11)) * tlw * tch4 * bplnk(4,i,kn)
du02 = 0.100090*du01
du12 = 0.0992746*du11
dbeta02 = 0.964282*dbeta01
!
! 589 cm-1 band
!
an2o2 = 2.65581*sqti(i)*log(1.0 + func(du02,dbeta02) &
+ func(du12,dbeta02)) * tco2(i) * th2o(i) * bplnk(5,i,kn)
du03 = 0.0333767*du01
dbeta03 = 0.982143*dbeta01
!
! 1168 cm-1 band
!
an2o3 = 2.54034*sqti(i)*log(1.0 + func(du03,dbeta03)) * &
tw(i,6) * tcfc8 * bplnk(6,i,kn)
!
! Absorptivity for 1064 cm-1 band of CO2
!
du11 = abs(uco211(i,k2+1) - uco211(i,k2)) * winpl(i,kn)
du12 = abs(uco212(i,k2+1) - uco212(i,k2)) * winpl(i,kn)
du13 = abs(uco213(i,k2+1) - uco213(i,k2)) * winpl(i,kn)
dbetc1 = 2.97558 * pinpl(i,kn) * rsqti(i) / sslp
dbetc2 = 2.0 * dbetc1
aco21 = 3.7571*sqti(i)*log(1.0 + func(du11,dbetc1) &
+ func(du12,dbetc2) + func(du13,dbetc2)) &
* to3(i) * tw(i,5) * tcfc4 * tcfc7 * bplnk(2,i,kn)
!
! Absorptivity for 961 cm-1 band of co2
!
du21 = abs(uco221(i,k2+1) - uco221(i,k2)) * winpl(i,kn)
du22 = abs(uco222(i,k2+1) - uco222(i,k2)) * winpl(i,kn)
du23 = abs(uco223(i,k2+1) - uco223(i,k2)) * winpl(i,kn)
aco22 = 3.8443*sqti(i)*log(1.0 + func(du21,dbetc1) &
+ func(du22,dbetc1) + func(du23,dbetc2)) &
* tw(i,4) * tcfc3 * tcfc6 * bplnk(1,i,kn)
!
! total trace gas absorptivity
!
abstrc(i) = acfc1 + acfc2 + acfc3 + acfc4 + acfc5 + acfc6 + &
acfc7 + acfc8 + an2o1 + an2o2 + an2o3 + ach4 + &
aco21 + aco22
end do
!
return
!
end subroutine trcabn