#include <misc.h>
#include <params.h>
subroutine trcab(lchnk ,ncol , & 1,3
k1 ,k2 ,ucfc11 ,ucfc12 ,un2o0 , &
un2o1 ,uch4 ,uco211 ,uco212 ,uco213 , &
uco221 ,uco222 ,uco223 ,bn2o0 ,bn2o1 , &
bch4 ,to3co2 ,pnm ,dw ,pnew , &
s2c ,uptype ,dplh2o ,abplnk1 ,tco2 , &
th2o ,to3 ,abstrc , &
aer_trn_ttl)
!-----------------------------------------------------------------------
!
! Purpose:
! Calculate absorptivity for non nearest layers for CH4, N2O, CFC11 and
! CFC12.
!
! Method:
! See CCM3 description for equations.
!
! 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) :: k1,k2 ! level indices
!
real(r8), intent(in) :: to3co2(pcols) ! pressure weighted temperature
real(r8), intent(in) :: pnm(pcols,pverp) ! interface pressures
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) :: bn2o0(pcols,pverp) ! pressure factor for n2o
real(r8), intent(in) :: bn2o1(pcols,pverp) ! pressure factor for n2o
!
real(r8), intent(in) :: bch4(pcols,pverp) ! pressure factor for ch4
real(r8), intent(in) :: dw(pcols) ! h2o path length
real(r8), intent(in) :: pnew(pcols) ! pressure
real(r8), intent(in) :: s2c(pcols,pverp) ! continuum path length
real(r8), intent(in) :: uptype(pcols,pverp) ! p-type h2o path length
!
real(r8), intent(in) :: dplh2o(pcols) ! p squared h2o path length
real(r8), intent(in) :: abplnk1(14,pcols,pverp) ! Planck factor
real(r8), intent(in) :: tco2(pcols) ! co2 transmission factor
real(r8), intent(in) :: th2o(pcols) ! h2o transmission factor
real(r8), intent(in) :: to3(pcols) ! o3 transmission factor
real(r8), intent(in) :: aer_trn_ttl(pcols,pverp,pverp,bnd_nbr_LW) ! aer trn.
!
! 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) du1 ! cfc11 path length
real(r8) du2 ! cfc12 path length
real(r8) acfc1 ! cfc11 absorptivity 798 cm-1
real(r8) acfc2 ! cfc11 absorptivity 846 cm-1
!
real(r8) acfc3 ! cfc11 absorptivity 933 cm-1
real(r8) acfc4 ! cfc11 absorptivity 1085 cm-1
real(r8) acfc5 ! cfc12 absorptivity 889 cm-1
real(r8) acfc6 ! cfc12 absorptivity 923 cm-1
real(r8) acfc7 ! cfc12 absorptivity 1102 cm-1
!
real(r8) acfc8 ! cfc12 absorptivity 1161 cm-1
real(r8) du01 ! n2o path length
real(r8) dbeta01 ! n2o pressure factor
real(r8) dbeta11 ! "
real(r8) an2o1 ! absorptivity of 1285 cm-1 n2o band
!
real(r8) du02 ! n2o path length
real(r8) dbeta02 ! n2o pressure factor
real(r8) an2o2 ! absorptivity of 589 cm-1 n2o band
real(r8) du03 ! n2o path length
real(r8) dbeta03 ! n2o pressure factor
!
real(r8) an2o3 ! absorptivity of 1168 cm-1 n2o band
real(r8) duch4 ! ch4 path length
real(r8) dbetac ! ch4 pressure factor
real(r8) ach4 ! absorptivity of 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 1064 cm-1 band
!
real(r8) du21 ! co2 path length
real(r8) du22 ! "
real(r8) du23 ! "
real(r8) aco22 ! absorptivity of 961 cm-1 band
real(r8) tt(pcols) ! temp. factor for h2o overlap factor
!
real(r8) psi1 ! "
real(r8) phi1 ! "
real(r8) p1 ! h2o overlap factor
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 factor
real(r8) g1(6) ! "
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 for cfc11 band
real(r8) tcfc4 ! transmission for cfc11 band
real(r8) tcfc6 ! transmission for cfc12 band
real(r8) tcfc7 ! transmission for cfc12 band
real(r8) tcfc8 ! transmission for cfc12 band
!
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(to3co2(i))
!
! h2o transmission
!
tt(i) = abs(to3co2(i) - 250.0)
ds2c(i) = abs(s2c(i,k1) - s2c(i,k2))
duptyp(i) = abs(uptype(i,k1) - uptype(i,k2))
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)*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_ttl(i,k1,k2,idx_LW_0650_0800)+&! l=1: 0750--0820 cm-1
0.3*aer_trn_ttl(i,k1,k2,idx_LW_0800_1000))
tw(i,2)=tw(i,2)*aer_trn_ttl(i,k1,k2,idx_LW_0800_1000) ! l=2: 0820--0880 cm-1
tw(i,3)=tw(i,3)*aer_trn_ttl(i,k1,k2,idx_LW_0800_1000) ! l=3: 0880--0900 cm-1
tw(i,4)=tw(i,4)*aer_trn_ttl(i,k1,k2,idx_LW_0800_1000) ! l=4: 0900--1000 cm-1
tw(i,5)=tw(i,5)*aer_trn_ttl(i,k1,k2,idx_LW_1000_1200) ! l=5: 1000--1120 cm-1
tw(i,6)=tw(i,6)*aer_trn_ttl(i,k1,k2,idx_LW_1000_1200) ! l=6: 1120--1170 cm-1
end do ! end loop over lon
do i = 1,ncol
du1 = abs(ucfc11(i,k1) - ucfc11(i,k2))
du2 = abs(ucfc12(i,k1) - ucfc12(i,k2))
!
! 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)*abplnk1(7,i,k2)
acfc2 = 60.0*(1.0 - exp(-5130.03*du1))*tw(i,2)*abplnk1(8,i,k2)
acfc3 = 60.0*(1.0 - tcfc3)*tw(i,4)*tcfc6*abplnk1(9,i,k2)
acfc4 = 100.0*(1.0 - tcfc4)*tw(i,5)*abplnk1(10,i,k2)
!
! Absorptivity for CFC12 bands
!
acfc5 = 45.0*(1.0 - exp(-1272.35*du2))*tw(i,3)*abplnk1(11,i,k2)
acfc6 = 50.0*(1.0 - tcfc6)* tw(i,4) * abplnk1(12,i,k2)
acfc7 = 80.0*(1.0 - tcfc7)* tw(i,5) * tcfc4*abplnk1(13,i,k2)
acfc8 = 70.0*(1.0 - tcfc8)* tw(i,6) * abplnk1(14,i,k2)
!
! Emissivity for CH4 band 1306 cm-1
!
tlw = exp(-1.0*sqrt(dplh2o(i)))
tlw=tlw*aer_trn_ttl(i,k1,k2,idx_LW_1200_2000)
duch4 = abs(uch4(i,k1) - uch4(i,k2))
dbetac = abs(bch4(i,k1) - bch4(i,k2))/duch4
ach4 = 6.00444*sqti(i)*log(1.0 + func(duch4,dbetac))*tlw*abplnk1(3,i,k2)
tch4 = 1.0/(1.0 + 0.02*func(duch4,dbetac))
!
! Absorptivity for N2O bands
!
du01 = abs(un2o0(i,k1) - un2o0(i,k2))
du11 = abs(un2o1(i,k1) - un2o1(i,k2))
dbeta01 = abs(bn2o0(i,k1) - bn2o0(i,k2))/du01
dbeta11 = abs(bn2o1(i,k1) - bn2o1(i,k2))/du11
!
! 1285 cm-1 band
!
an2o1 = 2.35558*sqti(i)*log(1.0 + func(du01,dbeta01) &
+ func(du11,dbeta11))*tlw*tch4*abplnk1(4,i,k2)
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))*th2o(i)*tco2(i)*abplnk1(5,i,k2)
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*abplnk1(6,i,k2)
!
! Emissivity for 1064 cm-1 band of CO2
!
du11 = abs(uco211(i,k1) - uco211(i,k2))
du12 = abs(uco212(i,k1) - uco212(i,k2))
du13 = abs(uco213(i,k1) - uco213(i,k2))
dbetc1 = 2.97558*abs(pnm(i,k1) + pnm(i,k2))/(2.0*sslp*sqti(i))
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*abplnk1(2,i,k2)
!
! Emissivity for 961 cm-1 band
!
du21 = abs(uco221(i,k1) - uco221(i,k2))
du22 = abs(uco222(i,k1) - uco222(i,k2))
du23 = abs(uco223(i,k1) - uco223(i,k2))
aco22 = 3.8443*sqti(i)*log(1.0 + func(du21,dbetc1) &
+ func(du22,dbetc1) + func(du23,dbetc2)) &
*tw(i,4)*tcfc3*tcfc6*abplnk1(1,i,k2)
!
! 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 trcab