!-------------------------------------- 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
!version 3 or (at your option) any later version that should be found at:
!http://collaboration.cmc.ec.gc.ca/science/rpn.comm/license.html
!
!This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
!without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!See the above mentioned License/Disclaimer for more details.
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!-------------------------------------- LICENCE END --------------------------------------
***S/P LATTENU - ATTENUATION FOR THE DOWNWARD FLUX
*
#include "phy_macros_f.h"
subroutine lattenu (atten, ib, ig, o3, qq, 1,6
1 dp, dip, dt, dt0, inpt,
2 il1, il2, ilg, s1, rmu)
#include "impnone.cdk"
*
integer il1, il2, ilg, ib, ig, ng, i
real atten(ilg), o3(ilg), qq(ilg), dp(ilg), dip(ilg), dt(ilg),
1 dt0(ilg), s1(ilg), rmu(ilg)
integer inpt(ilg),isl
*
*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,P.Vaillancourt (Apr 08) - use integer variables instead of actual integers
*
*Object
*
* Calculation of the attenuation for the downward flux above the
* model top level. since the temperature at 0.005 mb is unknown we
* assume it is the same as that of model top level
*
*Arguments
*
* atten for solar: the attenuation factor for downward flux from
* toa to the model top level; for longwave: the optical
* / diffuse factor
* dp here dp is only the pressure difference, different from
* that defined in raddriv. so there is a factor 1.02
* o3 o3 mass mixing ratio
* qq water vapor mass mixing ratio
* dip interpolation factor for pressure between two
* neighboring standard input data pressure levels
* dt layer temperature - 250 k
* dt0 temperature in moon layer - 250 k
*----------------------------------------------------------------------
*
**
#include "bandlh.cdk"
c
if (ib .eq. 1) then
ng = 3
isl=2
call attenue (atten, cl1co2gh(1,1,ig), o3, qq, dp, dip, dt, dt0,
1 rmu, inpt, ntl, ng, isl, il1, il2, ilg, s1)
c
else if (ib .eq. 2) then
do 200 i = il1, il2
atten(i) = 0.0
200 continue
c
else if (ib .eq. 3) then
ng = 1
isl=2
call attenue (atten, cl3h2ogh(1,1,ig), o3, qq, dp, dip, dt, dt0,
1 rmu, inpt, ntl, ng, isl, il1, il2, ilg, s1)
c
else if (ib .eq. 4) then
do 400 i = il1, il2
atten(i) = 0.0
400 continue
c
else if (ib .eq. 5) then
ng = 2
isl=2
call attenue (atten, cl5o3gh(1,1,ig), o3, qq, dp, dip, dt, dt0,
1 rmu, inpt, ntl, ng, isl, il1, il2, ilg, s1)
c
else if (ib .eq. 7) then
ng = 3
isl=2
call attenue (atten, cl7co2gh(1,1,ig), o3, qq, dp, dip, dt, dt0,
1 rmu, inpt, ntl, ng, isl, il1, il2, ilg, s1)
c
else if (ib .eq. 8) then
ng = 1
isl=2
call attenue (atten, cl8h2ogh(1,1,ig), o3, qq, dp, dip, dt, dt0,
1 rmu, inpt, ntl, ng, isl, il1, il2, ilg, s1)
c
else if (ib .eq. 9) then
ng = 1
isl=2
call attenue (atten, cl9h2ogh(1,1,ig), o3, qq, dp, dip, dt, dt0,
1 rmu, inpt, ntl, ng, isl, il1, il2, ilg, s1)
c
endif
c
return
end