!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
! version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
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***S/P TLINE1 - OPTICAL DEPTH FOR ONE GAS
*
#include "phy_macros_f.h"
subroutine tline1 (taug, coef1, qq, ng, dp, dip, 18
1 dt, inpt, lev1, gh, lc, iplus,
2 il1, il2, ilg, lay, s1)
*
#include "impnone.cdk"
c
integer ilg, lay, lc, ng, lev1, iplus, il1, il2, lay1, lay2
integer k, i, m, n
real x1, x2
real taug(ilg,lay), coef1(5,lc), qq(ilg,lay), dp(ilg,lay),
1 dip(ilg,lay), dt(ilg,lay), s1(ilg,lay)
integer inpt(ilg,lay)
logical gh
*
*Authors
*
* J. Li, M. Lazare, CCCMA, rt code for gcm4
* (Ref: J. Li, H. W. Barker, 2005:
* JAS Vol. 62, no. 2, pp. 286\226309)
* P. Vaillancourt, D. Talbot, RPN/CMC;
* adapted for CMC/RPN physics (May 2006)
*
*Revisions
*
* 001 M.Lazarre,K.Winger (Apr 08) - correct bug - lc now used for dimension of array and n as a variable integer
*
*Object
*
* Calculation of optical depth for one gas (line contribution only)
* the gaseous absorption coefficients in units of cm^2 / gram.
* s in mass mixing ratio. absorption coefficient are calculated
* at the temperature t for the 18 or 26 (28) pressure levels.
* isl = 1 for solar, isl = 2 for infrared.
*
*Arguments
*
* taug gaseous optical depth
* qq input gas mixing ratio for each layer
* dp air mass path for a model layer (explained in raddriv)
* dip interpolation factor for pressure between two neighboring
* standard input data pressure levels
* dt layer temperature - 250 k
* inpt number of the level for the standard input data pressures
*
*Implicites
*
#include "tracegases.cdk"
*
**
if (gh) then
lay1 = 1
else
lay1 = lev1
endif
lay2 = lay
c
c initialize taug if iplus=2.
c
if (iplus .eq. 2) then
do 50 k = lay1, lay2
do 50 i = il1, il2
taug(i,k) = 0.
50 continue
endif
c
if (ng .eq. 1) then
do 100 k = lay1, lay2
do 100 i = il1, il2
s1(i,k) = qq(i,k)
100 continue
c
else if (ng .eq. 3) then
do 300 k = lay1, lay2
do 300 i = il1, il2
s1(i,k) = rmco2
300 continue
c
else if (ng .eq. 5) then
do 500 k = lay1, lay2
do 500 i = il1, il2
s1(i,k) = rmn2o
500 continue
c
else if (ng .eq. 6) then
do 600 k = lay1, lay2
do 600 i = il1, il2
s1(i,k) = rmo2
600 continue
endif
c
do 2000 k = lay1, lay2
if (inpt(1,k) .lt. 950) then
do 1000 i = il1, il2
m = inpt(i,k)
n = m + 1
x2 = coef1(1,n) + dt(i,k) * (coef1(2,n) +
1 dt(i,k) * (coef1(3,n) + dt(i,k) *
2 (coef1(4,n) + dt(i,k) * coef1(5,n))))
if (m .gt. 0) then
x1 = coef1(1,m) + dt(i,k) * (coef1(2,m) +
1 dt(i,k) * (coef1(3,m) + dt(i,k) *
2 (coef1(4,m) + dt(i,k) * coef1(5,m))))
else
x1 = 0.0
endif
c
taug(i,k) = taug(i,k) + (x1 + (x2 - x1) * dip(i,k)) *
1 s1(i,k) * dp(i,k)
1000 continue
else
m = inpt(1,k) - 1000
n = m + 1
do 1500 i = il1, il2
x2 = coef1(1,n) + dt(i,k) * (coef1(2,n) +
1 dt(i,k) * (coef1(3,n) + dt(i,k) *
2 (coef1(4,n) + dt(i,k) * coef1(5,n))))
if (m .gt. 0) then
x1 = coef1(1,m) + dt(i,k) * (coef1(2,m) +
1 dt(i,k) * (coef1(3,m) + dt(i,k) *
2 (coef1(4,m) + dt(i,k) * coef1(5,m))))
else
x1 = 0.0
endif
c
taug(i,k) = taug(i,k) + (x1 + (x2 - x1) * dip(i,k)) *
1 s1(i,k) * dp(i,k)
1500 continue
endif
2000 continue
c
return
end