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Make CO2 a function of year instead of a single constant #1173

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Make CO2 a function of year instead of a single constant #1173

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5272c80
Follow WRF and make CO2 a function of year instead of a single constant
weiwangncar May 29, 2024
dd0ccc1
modify the way co2 equation is added to the radiation physics
weiwangncar Jun 18, 2024
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4 changes: 4 additions & 0 deletions src/core_atmosphere/physics/mpas_atmphys_driver_radiation_lw.F
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Expand Up @@ -17,6 +17,7 @@ module mpas_atmphys_driver_radiation_lw
use mpas_atmphys_camrad_init
use mpas_atmphys_rrtmg_lwinit
use mpas_atmphys_vars
use mpas_atmphys_functions, only: co2_estimate

!wrf physics:
use module_ra_cam
Expand Down Expand Up @@ -835,6 +836,7 @@ subroutine driver_radiation_lw(xtime_s,configs,mesh,state,time_lev,diag_physics,
!local variables:
integer:: o3input
real(kind=RKIND):: radt,xtime_m
real(kind=RKIND):: co2

!-----------------------------------------------------------------------------------------------------------------
!call mpas_log_write(' --- enter subroutine driver_radiation_lw: ')
Expand All @@ -851,6 +853,7 @@ subroutine driver_radiation_lw(xtime_s,configs,mesh,state,time_lev,diag_physics,
case ("rrtmg_lw")
o3input = 0
if(config_o3climatology) o3input = 2
co2 = co2_estimate(year,curr_julday)

call mpas_timer_start('RRTMG_lw')
call rrtmg_lwrad( &
Expand All @@ -870,6 +873,7 @@ subroutine driver_radiation_lw(xtime_s,configs,mesh,state,time_lev,diag_physics,
rre_snow = rresnow_p , lwupt = lwupt_p , lwuptc = lwuptc_p , &
lwdnt = lwdnt_p , lwdntc = lwdntc_p , lwupb = lwupb_p , &
lwupbc = lwupbc_p , lwdnb = lwdnb_p , lwdnbc = lwdnbc_p , &
co2 = co2 , &
ids = ids , ide = ide , jds = jds , jde = jde , kds = kds , kde = kde , &
ims = ims , ime = ime , jms = jms , jme = jme , kms = kms , kme = kme , &
its = its , ite = ite , jts = jts , jte = jte , kts = kts , kte = kte &
Expand Down
4 changes: 4 additions & 0 deletions src/core_atmosphere/physics/mpas_atmphys_driver_radiation_sw.F
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Expand Up @@ -16,6 +16,7 @@ module mpas_atmphys_driver_radiation_sw
use mpas_atmphys_camrad_init
use mpas_atmphys_rrtmg_swinit
use mpas_atmphys_vars
use mpas_atmphys_functions, only: co2_estimate

!wrf physics:
use module_ra_cam
Expand Down Expand Up @@ -733,6 +734,7 @@ subroutine driver_radiation_sw(itimestep,configs,mesh,state,time_lev,diag_physic
!local variables:
integer:: o3input
real(kind=RKIND):: radt,xtime_m
real(kind=RKIND):: co2

!-----------------------------------------------------------------------------------------------------------------
!call mpas_log_write(' --- enter subroutine driver_radiation_sw: $i',intArgs=(/itimestep/))
Expand Down Expand Up @@ -770,6 +772,7 @@ subroutine driver_radiation_sw(itimestep,configs,mesh,state,time_lev,diag_physic
case ("rrtmg_sw")
o3input = 0
if(config_o3climatology) o3input = 2
co2 = co2_estimate(year,curr_julday)

call mpas_timer_start('RRTMG_sw')
call rrtmg_swrad( &
Expand All @@ -792,6 +795,7 @@ subroutine driver_radiation_sw(itimestep,configs,mesh,state,time_lev,diag_physic
swdnt = swdnt_p , swdntc = swdntc_p , swupb = swupb_p , &
swupbc = swupbc_p , swdnb = swdnb_p , swdnbc = swdnbc_p , &
swddir = swddir_p , swddni = swddni_p , swddif = swddif_p , &
co2 = co2 , &
ids = ids , ide = ide , jds = jds , jde = jde , kds = kds , kde = kde , &
ims = ims , ime = ime , jms = jms , jme = jme , kms = kms , kme = kme , &
its = its , ite = ite , jts = jts , jte = jte , kts = kts , kte = kte &
Expand Down
25 changes: 24 additions & 1 deletion src/core_atmosphere/physics/mpas_atmphys_functions.F
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Expand Up @@ -14,7 +14,7 @@ module mpas_atmphys_functions

implicit none
private
public:: gammln,gammp,wgamma,rslf,rsif
public:: gammln,gammp,wgamma,rslf,rsif,co2_estimate


contains
Expand Down Expand Up @@ -216,6 +216,29 @@ REAL(KIND=RKIND) FUNCTION RSIF(P,T)

END FUNCTION RSIF

!+---+-----------------------------------------------------------------+
! This function calculates CO2 from an equation in WRF by J. Dudhia
!
real(kind=rkind) function co2_estimate(year,curr_julday)

implicit none
integer, intent(in) :: year
real, intent(in) :: curr_julday
real(kind=rkind) :: rdays,ryear
integer :: ny1, ny2, ny3

rdays = 365.
ny1 = mod(year,4)
ny2 = mod(year,100)
ny3 = mod(year,400)
if(ny1.eq.0.and.ny2.ne.0.or.ny3.eq.0) rdays = 366.
ryear = float(year)+curr_julday/rdays

! Annual function for co2 from WRF v4.2
co2_estimate = (280. + 90.*exp(0.02*(ryear-2000.)))*1.e-6

end function co2_estimate

!=================================================================================================================
end module mpas_atmphys_functions
!=================================================================================================================
3 changes: 2 additions & 1 deletion src/core_atmosphere/physics/physics_wrf/module_ra_rrtmg_lw.F
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Expand Up @@ -11482,6 +11482,7 @@ subroutine rrtmg_lwrad( &
lwupt,lwuptc,lwdnt,lwdntc, &
lwupb,lwupbc,lwdnb,lwdnbc, &
lwupflx, lwupflxc, lwdnflx, lwdnflxc, &
co2, &
ids,ide, jds,jde, kds,kde, &
ims,ime, jms,jme, kms,kme, &
its,ite, jts,jte, kts,kte &
Expand Down Expand Up @@ -11565,7 +11566,7 @@ subroutine rrtmg_lwrad( &
!--- set trace gas volume mixing ratios, 2005 values, IPCC (2007):
!carbon dioxide (379 ppmv)
real :: co2
data co2 / 379.e-6 /
!data co2 / 379.e-6 /
!methane (1774 ppbv)
real :: ch4
data ch4 / 1774.e-9 /
Expand Down
3 changes: 2 additions & 1 deletion src/core_atmosphere/physics/physics_wrf/module_ra_rrtmg_sw.F
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Expand Up @@ -9877,6 +9877,7 @@ subroutine rrtmg_swrad( &
swupb,swupbc,swdnb,swdnbc, &
swupflx, swupflxc, swdnflx, swdnflxc, &
swddir,swddni,swddif, &
co2, &
ids,ide, jds,jde, kds,kde, &
ims,ime, jms,jme, kms,kme, &
its,ite, jts,jte, kts,kte &
Expand Down Expand Up @@ -9973,7 +9974,7 @@ subroutine rrtmg_swrad( &
!--- set trace gas volume mixing ratios, 2005 values, IPCC (2007):
!carbon dioxide (379 ppmv)
real :: co2
data co2 / 379.e-6 /
!data co2 / 379.e-6 /
!methane (1774 ppbv)
real :: ch4
data ch4 / 1774.e-9 /
Expand Down