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Land surface upgrades for HR4 #219

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merged 10 commits into from
Jul 23, 2024
Merged

Land surface upgrades for HR4 #219

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14d0aad
remove veg-dependent opt_diag used in hr3
HelinWei-NOAA Mar 12, 2024
0ff86ac
use radiative temp as skin temp to the atmosphere
HelinWei-NOAA Mar 28, 2024
9e5eeb8
create a single_loop_alternate for hr4_test3
Apr 4, 2024
e039a94
opt_trs bug fixed
Apr 8, 2024
31bca4e
test 6-9
HelinWei-NOAA May 22, 2024
1816f72
all changes from test6 to test11
Jun 20, 2024
3a361b2
update noahmp table for hr4
Jul 2, 2024
8b6379e
Merge pull request #91 from ufs-community/ufs/dev
HelinWei-NOAA Jul 2, 2024
35b15e3
remove unnecessary comments for the snow temperature initialization
Jul 16, 2024
002e029
Merge remote-tracking branch 'upstream/ufs/dev' into land_upgrade_hr4
jkbk2004 Jul 20, 2024
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4 changes: 3 additions & 1 deletion physics/Interstitials/UFS_SCM_NEPTUNE/GFS_phys_time_vary.fv3.F90
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Expand Up @@ -593,8 +593,10 @@ subroutine GFS_phys_time_vary_init (

isnow = nint(snowxy(ix))+1 ! snowxy <=0.0, dzsno >= 0.0

! using stc and tgxy to linearly interpolate the snow temp for each layer

do is = isnow,0
tsnoxy(ix,is) = tgxy(ix)
tsnoxy(ix,is) = tgxy(ix) + (( sum(dzsno(isnow:is)) -0.5*dzsno(is) )/snd)*(stc(ix,1)-tgxy(ix))
snliqxy(ix,is) = zero
snicexy(ix,is) = one * dzsno(is) * weasd(ix)/snd
enddo
Expand Down
14 changes: 1 addition & 13 deletions physics/SFC_Layer/UFS/sfc_diag_post.F90
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Expand Up @@ -14,15 +14,14 @@ module sfc_diag_post
!!
#endif
subroutine sfc_diag_post_run (im, lsm, lsm_noahmp, opt_diag, dry, lssav, dtf, con_eps, con_epsm1, pgr,&
vegtype,t2mmp,q2mp, t2m, q2m, u10m, v10m, tmpmin, tmpmax, spfhmin, spfhmax, &
t2mmp,q2mp, t2m, q2m, u10m, v10m, tmpmin, tmpmax, spfhmin, spfhmax, &
wind10mmax, u10mmax, v10mmax, dpt2m, errmsg, errflg)

use machine, only: kind_phys, kind_dbl_prec

implicit none

integer, intent(in) :: im, lsm, lsm_noahmp,opt_diag
integer, dimension(:), intent(in) :: vegtype ! vegetation type (integer index)
logical, intent(in) :: lssav
real(kind=kind_phys), intent(in) :: dtf, con_eps, con_epsm1
logical , dimension(:), intent(in) :: dry
Expand All @@ -42,17 +41,6 @@ subroutine sfc_diag_post_run (im, lsm, lsm_noahmp, opt_diag, dry, lssav, dtf, co
errflg = 0

if (lsm == lsm_noahmp) then
! over shrublands use opt_diag=2
do i=1, im
if(dry(i)) then
if (vegtype(i) == 6 .or. vegtype(i) == 7 &
.or. vegtype(i) == 16) then
t2m(i) = t2mmp(i)
q2m(i) = q2mp(i)
endif
endif
enddo

if (opt_diag == 2 .or. opt_diag == 3) then
do i=1,im
if(dry(i)) then
Expand Down
7 changes: 0 additions & 7 deletions physics/SFC_Layer/UFS/sfc_diag_post.meta
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Expand Up @@ -82,13 +82,6 @@
type = real
kind = kind_phys
intent = in
[vegtype]
standard_name = vegetation_type_classification
long_name = vegetation type at each grid cell
units = index
dimensions = (horizontal_loop_extent)
type = integer
intent= in
[t2mmp]
standard_name = temperature_at_2m_from_noahmp
long_name = 2 meter temperature from noahmp
Expand Down
50 changes: 24 additions & 26 deletions physics/SFC_Models/Land/Noahmp/module_sf_noahmplsm.F90
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Expand Up @@ -1989,7 +1989,7 @@ subroutine energy (parameters,ice ,vegtyp ,ist ,nsnow ,nsoil , & !in

real (kind=kind_phys), parameter :: mpe = 1.e-6
real (kind=kind_phys), parameter :: psiwlt = -150. !metric potential for wilting point (m)
real (kind=kind_phys), parameter :: z0 = 0.002 ! bare-soil roughness length (m) (i.e., under the canopy)
real (kind=kind_phys), parameter :: z0 = 0.015 ! bare-soil roughness length (m) (i.e., under the canopy)
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where does "0.015" come from? Is it tuned? I did not find this value in the Noah-MP.

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it is tuned based on wind speed bias over bare soil and vegetated areas with low vegetation fraction

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got it. thanks!


! ---------------------------------------------------------------------------------------------------
! initialize fluxes from veg. fraction
Expand Down Expand Up @@ -2629,10 +2629,10 @@ subroutine csnow (parameters,isnow ,nsnow ,nsoil ,snice ,snliq ,dzsnso
! thermal conductivity of snow

do iz = isnow+1, 0
! tksno(iz) = 3.2217e-6*bdsnoi(iz)**2. ! stieglitz(yen,1965)
! tksno(iz) = 3.2217e-6*bdsnoi(iz)**2. ! stieglitz(yen,1965)
! tksno(iz) = 2e-2+2.5e-6*bdsnoi(iz)*bdsnoi(iz) ! anderson, 1976
! tksno(iz) = 0.35 ! constant
tksno(iz) = 2.576e-6*bdsnoi(iz)**2. + 0.074 ! verseghy (1991)
tksno(iz) = 0.35 ! constant
! tksno(iz) = 2.576e-6*bdsnoi(iz)**2. + 0.074 ! verseghy (1991)
! tksno(iz) = 2.22*(bdsnoi(iz)/1000.)**1.88 ! douvill(yen, 1981)
enddo

Expand Down Expand Up @@ -4056,11 +4056,6 @@ subroutine vege_flux(parameters,nsnow ,nsoil ,isnow ,vegtyp ,veg , &

end if

! prepare for longwave rad.

air = -emv*(1.+(1.-emv)*(1.-emg))*lwdn - emv*emg*sb*tg**4
cir = (2.-emv*(1.-emg))*emv*sb
!
if(opt_sfc == 4) then

gdx = sqrt(garea1)
Expand Down Expand Up @@ -4207,6 +4202,11 @@ subroutine vege_flux(parameters,nsnow ,nsoil ,isnow ,vegtyp ,veg , &
end if
end if

! prepare for longwave rad.

air = -emv*(1.+(1.-emv)*(1.-emg))*lwdn - emv*emg*sb*tg**4
cir = (2.-emv*(1.-emg))*emv*sb

! prepare for sensible heat flux above veg.

cah = 1./rahc
Expand Down Expand Up @@ -4269,7 +4269,7 @@ subroutine vege_flux(parameters,nsnow ,nsoil ,isnow ,vegtyp ,veg , &

! update vegetation surface temperature
tv = tv + dtv
! tah = ata + bta*tv ! canopy air t; update here for consistency
tah = ata + bta*tv ! canopy air t; update here for consistency

! for computing m-o length in the next iteration
h = rhoair*cpair*(tah - sfctmp) /rahc
Expand All @@ -4282,15 +4282,7 @@ subroutine vege_flux(parameters,nsnow ,nsoil ,isnow ,vegtyp ,veg , &
qfx = (qsfc-qair)*rhoair*caw
endif


if (liter == 1) then
exit loop1
endif
if (iter >= 5 .and. abs(dtv) <= 0.01 .and. liter == 0) then
liter = 1
endif

end do loop1 ! end stability iteration
! after canopy balance, do the under-canopy ground balance

! under-canopy fluxes and tg

Expand All @@ -4300,8 +4292,6 @@ subroutine vege_flux(parameters,nsnow ,nsoil ,isnow ,vegtyp ,veg , &
cev = rhoair*cpair / (gammag*(rawg+rsurf)) ! barlage: change to ground v3.6
cgh = 2.*df(isnow+1)/dzsnso(isnow+1)

loop2: do iter = 1, niterg

t = tdc(tg)
call esat(t, esatw, esati, dsatw, dsati)
if (t .gt. 0.) then
Expand All @@ -4327,7 +4317,14 @@ subroutine vege_flux(parameters,nsnow ,nsoil ,isnow ,vegtyp ,veg , &
gh = gh + cgh*dtg
tg = tg + dtg

end do loop2
if (liter == 1) then
exit loop1
endif
if (iter >= 5 .and. abs(dtv) <= 0.01 .and. abs(dtg) <= 0.01 .and. liter == 0) then
liter = 1 ! if conditions are met, then do one final loop
endif

end do loop1

! tah = (cah*sfctmp + cvh*tv + cgh*tg)/(cah + cvh + cgh)

Expand Down Expand Up @@ -5824,7 +5821,8 @@ subroutine thermalz0(parameters, fveg, z0m, z0mg, zlvl,

if (opt_trs == z0heqz0m) then

z0m_out = exp(fveg * log(z0m) + (1.0 - fveg) * log(z0mg))
! z0m_out = exp(fveg * log(z0m) + (1.0 - fveg) * log(z0mg))
z0m_out = fveg * z0m + (1.0 - fveg) * z0mg
z0h_out = z0m_out

elseif (opt_trs == chen09) then
Expand All @@ -5841,7 +5839,7 @@ subroutine thermalz0(parameters, fveg, z0m, z0mg, zlvl,
endif

z0h_out = exp( fveg * log(z0m * exp(-czil*0.4*258.2*sqrt(ustarx*z0m))) + &
(1.0 - fveg) * log(max(z0m/exp(kb_sigma_f0),1.0e-6)) )
(1.0 - fveg) * log(max(z0mg/exp(kb_sigma_f0),1.0e-6)) )

elseif (opt_trs == tessel) then

Expand Down Expand Up @@ -5880,15 +5878,15 @@ subroutine thermalz0(parameters, fveg, z0m, z0mg, zlvl,

z0h_out = z0m_out

elseif (opt_trs == chen09 .or. opt_trs == tessel) then
elseif (opt_trs == tessel) then

if (vegtyp <= 5) then
z0h_out = z0m_out
else
z0h_out = z0m_out * 0.01
endif

elseif (opt_trs == blumel99) then
elseif (opt_trs == chen09 .or. opt_trs == blumel99) then

reyn = ustarx*z0m_out/viscosity ! Blumel99 eqn 36c
if (reyn > 2.0) then
Expand Down
11 changes: 7 additions & 4 deletions physics/SFC_Models/Land/Noahmp/noahmpdrv.F90
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Expand Up @@ -663,6 +663,7 @@ subroutine noahmpdrv_run &
real (kind=kind_phys) :: precip_freeze_frac_in ! used for penman calculation

real (kind=kind_phys) :: virtfac1 ! virtual factor
real (kind=kind_phys) :: tflux ! surface flux temp
real (kind=kind_phys) :: tvs1 ! surface virtual temp
real (kind=kind_phys) :: vptemp ! virtual potential temp

Expand Down Expand Up @@ -944,7 +945,8 @@ subroutine noahmpdrv_run &
t2mmp(i) = temperature_bare_2m
q2mp(i) = spec_humidity_bare_2m

tskin(i) = temperature_ground
tskin(i) = temperature_radiative
tflux = temperature_ground
surface_temperature = temperature_ground
vegetation_fraction = vegetation_frac
ch_vegetated = 0.0
Expand Down Expand Up @@ -1038,7 +1040,8 @@ subroutine noahmpdrv_run &
q2mp(i) = spec_humidity_veg_2m * vegetation_fraction + &
spec_humidity_bare_2m * (1-vegetation_fraction)

tskin(i) = surface_temperature
tskin(i) = temperature_radiative
tflux = surface_temperature

endif ! glacial split ends

Expand Down Expand Up @@ -1194,9 +1197,9 @@ subroutine noahmpdrv_run &
endif

if(thsfc_loc) then ! Use local potential temperature
tvs1 = tskin(i) * virtfac1
tvs1 = tflux * virtfac1
else ! Use potential temperature referenced to 1000 hPa
tvs1 = tskin(i)/prsik1(i) * virtfac1
tvs1 = tflux/prsik1(i) * virtfac1
endif

z0_total = max(min(z0_total,forcing_height),1.0e-6)
Expand Down
32 changes: 17 additions & 15 deletions physics/SFC_Models/Land/Noahmp/noahmptable.tbl
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Expand Up @@ -217,7 +217,7 @@
!---------------------------------------------------------------------------------------------------------------------------------------------------------------------
ch2op = 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1,
dleaf = 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04,
z0mvt = 1.09, 1.10, 0.85, 0.80, 0.80, 0.20, 0.06, 0.60, 0.50, 0.12, 0.30, 0.15, 1.00, 0.14, 0.00, 0.00, 0.00, 0.30, 0.20, 0.03,
z0mvt = 1.00, 1.50, 0.75, 0.90, 0.85, 0.20, 0.10, 0.90, 0.60, 0.20, 0.30, 0.25, 1.00, 0.25, 0.00, 0.015, 0.00, 0.30, 0.10, 0.05,
hvt = 20.0, 20.0, 18.0, 16.0, 16.0, 1.10, 1.10, 13.0, 10.0, 1.00, 5.00, 2.00, 15.0, 1.50, 0.00, 0.00, 0.00, 4.00, 2.00, 0.50,
hvb = 8.50, 8.00, 7.00, 11.5, 10.0, 0.10, 0.10, 0.10, 0.10, 0.05, 0.10, 0.10, 1.00, 0.10, 0.00, 0.00, 0.00, 0.30, 0.20, 0.10,
z0mhvt= 0.0545, 0.055, 0.047, 0.050, 0.050, 0.182, 0.0545, 0.046, 0.050, 0.120, 0.060, 0.075, 0.067, 0.093, 0.000, 0.000, 0.000, 0.075, 0.100, 0.060,
Expand All @@ -226,32 +226,34 @@
!mfsno = 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50, 2.50,
! c. he 12/17/2020: optimized mfsno values dependent on land type based on evaluation with snotel swe and modis scf, surface albedo
mfsno = 1.00, 1.00, 1.00, 1.00, 1.00, 2.00, 2.00, 2.00, 2.00, 2.00, 3.00, 3.00, 4.00, 4.00, 2.50, 3.00, 3.00, 3.50, 3.50, 3.50,
!mfsno = 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97, 1.97,
! c. he 12/17/2020: optimized snow cover factor (m) in scf formulation to replace original constant 2.5*z0,z0=0.002m, based on evaluation with snotel swe and modis scf, surface albedo
! scffac = 0.008, 0.008, 0.008, 0.008, 0.008, 0.016, 0.016, 0.020, 0.020, 0.020, 0.020, 0.014, 0.042, 0.026, 0.030, 0.016, 0.030, 0.030, 0.030, 0.030,
scffac = 0.005, 0.005, 0.005, 0.005, 0.005, 0.008, 0.008, 0.010, 0.010, 0.010, 0.010, 0.007, 0.021, 0.013, 0.015, 0.008, 0.015, 0.015, 0.015, 0.015,
scffac = 0.005, 0.005, 0.005, 0.005, 0.005, 0.008, 0.008, 0.010, 0.010, 0.010, 0.010, 0.007, 0.021, 0.013, 0.015, 0.008, 0.015, 0.015, 0.015, 0.015,
! scffac = 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059, 0.059,
cbiom = 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02,

! row 1: vis
! row 2: near ir
rhol_vis=0.07, 0.10, 0.07, 0.10, 0.10, 0.07, 0.07, 0.07, 0.10, 0.11, 0.105, 0.11, 0.00, 0.11, 0.00, 0.00, 0.00, 0.10, 0.10, 0.10,
rhol_nir=0.35, 0.45, 0.35, 0.45, 0.45, 0.35, 0.35, 0.35, 0.45, 0.58, 0.515, 0.58, 0.00, 0.58, 0.00, 0.00, 0.00, 0.45, 0.45, 0.45,
rhol_nir=0.35, 0.45, 0.35, 0.45, 0.45, 0.35, 0.35, 0.35, 0.45, 0.35, 0.515, 0.35, 0.00, 0.35, 0.00, 0.00, 0.00, 0.45, 0.45, 0.45,

! row 1: vis
! row 2: near ir
rhos_vis=0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.36, 0.26, 0.36, 0.00, 0.36, 0.00, 0.00, 0.00, 0.16, 0.16, 0.16,
rhos_nir=0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.58, 0.485, 0.58, 0.00, 0.58, 0.00, 0.00, 0.00, 0.39, 0.39, 0.39,
rhos_vis=0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.16, 0.31, 0.26, 0.31, 0.00, 0.31, 0.00, 0.00, 0.00, 0.16, 0.16, 0.16,
rhos_nir=0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.39, 0.53, 0.485, 0.53, 0.00, 0.53, 0.00, 0.00, 0.00, 0.39, 0.39, 0.39,

! row 1: vis
! row 2: near ir
taul_vis=0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.07, 0.06, 0.07, 0.00, 0.07, 0.00, 0.00, 0.00, 0.05, 0.05, 0.05,
taul_nir=0.10, 0.25, 0.10, 0.25, 0.25, 0.10, 0.10, 0.10, 0.25, 0.25, 0.25, 0.25, 0.00, 0.25, 0.00, 0.00, 0.00, 0.25, 0.25, 0.25,
taul_vis=0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.05, 0.06, 0.05, 0.00, 0.05, 0.00, 0.00, 0.00, 0.05, 0.05, 0.05,
taul_nir=0.10, 0.25, 0.10, 0.25, 0.25, 0.10, 0.10, 0.10, 0.25, 0.34, 0.25, 0.34, 0.00, 0.34, 0.00, 0.00, 0.00, 0.25, 0.25, 0.25,

! row 1: vis
! row 2: near ir
taus_vis=0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.220, 0.1105, 0.220, 0.000, 0.220, 0.000, 0.000, 0.000, 0.001, 0.001, 0.001,
taus_nir=0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.380, 0.1905, 0.380, 0.000, 0.380, 0.000, 0.000, 0.000, 0.001, 0.001, 0.001,
taus_vis=0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.120, 0.1105, 0.120, 0.000, 0.120, 0.000, 0.000, 0.000, 0.001, 0.001, 0.001,
taus_nir=0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.250, 0.1905, 0.250, 0.000, 0.250, 0.000, 0.000, 0.000, 0.001, 0.001, 0.001,

xl = 0.010, 0.010, 0.010, 0.250, 0.250, 0.010, 0.010, 0.010, 0.010, -0.30, -0.025, -0.30, 0.000, -0.30, 0.000, 0.000, 0.000, 0.250, 0.250, 0.250,
xl = 0.010, 0.10, 0.010, 0.250, 0.250, 0.010, 0.010, 0.010, 0.010, -0.30, -0.025, -0.30, 0.000, -0.30, 0.000, 0.000, 0.000, 0.250, 0.250, 0.250,
! make cwpvt vegetation dependent according to j. goudriaan, crop micrometeorology: a simulation study (simulation monographs), 1977). c. he, 12/17/2020
! cwpvt = 0.18, 0.67, 0.18, 0.67, 0.29, 1.0, 2.0, 1.3, 1.0, 5.0, 1.17, 1.67, 1.67, 1.67, 0.18, 0.18, 0.18, 0.67, 1.0, 0.18,
cwpvt = 0.09, 0.335, 0.09, 0.335, 0.145, 0.5, 1.0, 0.65, 0.5, 2.5, 0.585, 0.835, 0.835, 0.835, 0.09, 0.09, 0.09, 0.335, 0.5, 0.09,
Expand Down Expand Up @@ -335,10 +337,10 @@
!--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
! 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 soil color index for soil albedo
!--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
albsat_vis = 0.25, 0.23, 0.21, 0.20, 0.19, 0.18, 0.17, 0.16, 0.15, 0.14, 0.13, 0.12, 0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04 ! saturated soil albedos
albsat_nir = 0.50, 0.46, 0.42, 0.40, 0.38, 0.36, 0.34, 0.32, 0.30, 0.28, 0.26, 0.24, 0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.08 ! saturated soil albedos
albdry_vis = 0.36, 0.34, 0.32, 0.31, 0.30, 0.29, 0.28, 0.27, 0.26, 0.25, 0.24, 0.23, 0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.08 ! dry soil albedos
albdry_nir = 0.61, 0.57, 0.53, 0.51, 0.49, 0.48, 0.45, 0.43, 0.41, 0.39, 0.37, 0.35, 0.33, 0.31, 0.29, 0.27, 0.25, 0.23, 0.21, 0.16 ! dry soil albedos
albsat_vis = 0.21, 0.20, 0.18, 0.17, 0.16, 0.15, 0.14, 0.13, 0.13, 0.12, 0.11, 0.10, 0.10, 0.09, 0.08, 0.08, 0.08, 0.07, 0.07, 0.06 ! saturated soil albedos
albsat_nir = 0.42, 0.40, 0.36, 0.34, 0.32, 0.30, 0.28, 0.26, 0.26, 0.24, 0.22, 0.20, 0.20, 0.18, 0.16, 0.16, 0.16, 0.14, 0.14, 0.13 ! saturated soil albedos
albdry_vis = 0.31, 0.30, 0.28, 0.27, 0.26, 0.24, 0.23, 0.22, 0.22, 0.22, 0.20, 0.19, 0.20, 0.18, 0.16, 0.16, 0.16, 0.14, 0.14, 0.13 ! dry soil albedos
albdry_nir = 0.52, 0.50, 0.46, 0.44, 0.42, 0.40, 0.38, 0.37, 0.36, 0.34, 0.32, 0.30, 0.30, 0.28, 0.27, 0.27, 0.27, 0.26, 0.25, 0.25 ! dry soil albedos
albice = 0.80, 0.55 ! albedo land ice: 1=vis, 2=nir
alblak = 0.60, 0.40 ! albedo frozen lakes: 1=vis, 2=nir
omegas = 0.8 , 0.4 ! two-stream parameter omega for snow
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class_sno_age = 3600.0 ! snow aging e-folding time (s) in class albedo scheme
class_alb_new = 0.84 ! fresh snow albedo in class scheme
psiwlt = -150.0 !metric potential for wilting point (m)
z0soil = 0.002 ! bare-soil roughness length (m) (i.e., under the canopy)
z0soil = 0.015 ! bare-soil roughness length (m) (i.e., under the canopy)
z0lake = 0.01 ! lake surface roughness length (m)
/

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