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DecompCascadeBGCMod_ELMv1a.F90
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DecompCascadeBGCMod_ELMv1a.F90
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module DecompCascadeBGCMod
!-----------------------------------------------------------------------
! !DESCRIPTION:
! Sets the coeffiecients used in the decomposition cascade submodel.
! This uses the CENTURY/BGC parameters
!
! !USES:
use shr_kind_mod , only : r8 => shr_kind_r8
use shr_const_mod , only : SHR_CONST_TKFRZ
use shr_log_mod , only : errMsg => shr_log_errMsg
use clm_varpar , only : nlevsoi, nlevgrnd, nlevdecomp, ndecomp_cascade_transitions, ndecomp_pools
use clm_varpar , only : i_met_lit, i_cel_lit, i_lig_lit, i_cwd
use clm_varctl , only : iulog, spinup_state, anoxia, use_lch4, use_vertsoilc, use_fates
use clm_varcon , only : zsoi
use decompMod , only : bounds_type
use abortutils , only : endrun
use SharedParamsMod , only : ParamsShareInst, anoxia_wtsat, nlev_soildecomp_standard
use CNDecompCascadeConType , only : decomp_cascade_con
use CNStateType , only : cnstate_type
use CNCarbonFluxType , only : carbonflux_type
use SoilStateType , only : soilstate_type
use CanopyStateType , only : canopystate_type
use TemperatureType , only : temperature_type
use ch4Mod , only : ch4_type
use ColumnType , only : col_pp
use ColumnDataType , only : col_es, col_ws, col_cf
!
implicit none
save
private
!
! !PUBLIC MEMBER FUNCTIONS:
public :: init_decompcascade_bgc
public :: readDecompBGCParams
public :: decomp_rate_constants_bgc
!
! !PUBLIC DATA MEMBERS
logical , public :: normalize_q10_to_century_tfunc = .true.! do we normalize the century decomp. rates so that they match the CLM Q10 at a given tep?
logical , public :: use_century_tfunc = .false.
real(r8), public :: normalization_tref = 15._r8 ! reference temperature for normalizaion (degrees C)
!
! !PRIVATE DATA MEMBERS
type, private :: DecompBGCParamsType
real(r8):: cn_s1_bgc !C:N for SOM 1
real(r8):: cn_s2_bgc !C:N for SOM 2
real(r8):: cn_s3_bgc !C:N for SOM 3
real(r8):: np_s1_new_bgc !C:P for SOM 1
real(r8):: np_s2_new_bgc !C:P for SOM 2
real(r8):: np_s3_new_bgc !C:P for SOM 3
real(r8):: cp_s1_new_bgc !C:P for SOM 1
real(r8):: cp_s2_new_bgc !C:P for SOM 2
real(r8):: cp_s3_new_bgc !C:P for SOM 3
real(r8):: rf_l1s1_bgc !respiration fraction litter 1 -> SOM 1
real(r8):: rf_l2s1_bgc
real(r8):: rf_l3s2_bgc
real(r8):: rf_s2s1_bgc
real(r8):: rf_s2s3_bgc
real(r8):: rf_s3s1_bgc
real(r8):: rf_cwdl2_bgc
real(r8):: rf_cwdl3_bgc
real(r8):: tau_l1_bgc ! turnover time of litter 1 (yr)
real(r8):: tau_l2_l3_bgc ! turnover time of litter 2 and litter 3 (yr)
real(r8):: tau_s1_bgc ! turnover time of SOM 1 (yr)
real(r8):: tau_s2_bgc ! turnover time of SOM 2 (yr)
real(r8):: tau_s3_bgc ! turnover time of SOM 3 (yr)
real(r8):: tau_cwd_bgc ! corrected fragmentation rate constant CWD
real(r8) :: cwd_fcel_bgc !cellulose fraction for CWD
real(r8) :: cwd_flig_bgc !
real(r8) :: k_frag_bgc !fragmentation rate for CWD
real(r8) :: minpsi_bgc !minimum soil water potential for heterotrophic resp
integer :: nsompools = 3
real(r8),allocatable :: spinup_vector(:) ! multipliers for soil decomp during accelerated spinup
end type DecompBGCParamsType
type(DecompBGCParamsType),private :: DecompBGCParamsInst
!-----------------------------------------------------------------------
contains
!-----------------------------------------------------------------------
subroutine readDecompBGCParams ( ncid )
!
! !DESCRIPTION:
!
! !USES:
use ncdio_pio , only: file_desc_t,ncd_io
!
! !ARGUMENTS:
type(file_desc_t),intent(inout) :: ncid ! pio netCDF file id
!
! !LOCAL VARIABLES:
character(len=32) :: subname = 'DecompBGCParamsType'
character(len=100) :: errCode = 'Error reading in CN const file '
logical :: readv ! has variable been read in or not
real(r8) :: tempr ! temporary to read in constant
character(len=100) :: tString ! temp. var for reading
!-----------------------------------------------------------------------
! These are not read off of netcdf file
allocate(DecompBGCParamsInst%spinup_vector(DecompBGCParamsInst%nsompools))
DecompBGCParamsInst%spinup_vector(:) = (/ 1.0_r8, 15.0_r8, 675.0_r8 /)
! Read off of netcdf file
tString='tau_l1'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%tau_l1_bgc=tempr
tString='tau_l2_l3'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%tau_l2_l3_bgc=tempr
tString='tau_s1'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%tau_s1_bgc=tempr
tString='tau_s2'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%tau_s2_bgc=tempr
tString='tau_s3'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%tau_s3_bgc=tempr
tString='tau_cwd'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%tau_cwd_bgc=tempr
tString='cn_s1_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%cn_s1_bgc=tempr
tString='cn_s2_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%cn_s2_bgc=tempr
tString='cn_s3_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%cn_s3_bgc=tempr
!!! read in phosphorus variables - note that these NP ratio parameters for BGC will have
!!! to be added in the parameter file
tString='np_s1_new'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%np_s1_new_bgc=tempr
tString='np_s2_new'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%np_s2_new_bgc=tempr
tString='np_s3_new'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%np_s3_new_bgc=tempr
tString='rf_l1s1_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_l1s1_bgc=tempr
tString='rf_l2s1_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_l2s1_bgc=tempr
tString='rf_l3s2_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_l3s2_bgc=tempr
tString='rf_s2s1_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_s2s1_bgc=tempr
tString='rf_s2s3_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_s2s3_bgc=tempr
tString='rf_s3s1_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_s3s1_bgc=tempr
tString='rf_cwdl2_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_cwdl2_bgc=tempr
tString='rf_cwdl3_bgc'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%rf_cwdl3_bgc=tempr
tString='cwd_fcel'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%cwd_fcel_bgc=tempr
tString='k_frag'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%k_frag_bgc=tempr
tString='minpsi_hr'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%minpsi_bgc=tempr
tString='cwd_flig'
call ncd_io(trim(tString),tempr, 'read', ncid, readvar=readv)
if ( .not. readv ) call endrun(msg=trim(errCode)//trim(tString)//errMsg(__FILE__, __LINE__))
DecompBGCParamsInst%cwd_flig_bgc=tempr
end subroutine readDecompBGCParams
!-----------------------------------------------------------------------
subroutine init_decompcascade_bgc(bounds, cnstate_vars, soilstate_vars)
!
! !DESCRIPTION:
! initialize rate constants and decomposition pathways following the decomposition cascade of the BGC model.
! written by C. Koven
!
! !USES:
use clm_time_manager , only : get_step_size
!
! !ARGUMENTS:
type(bounds_type) , intent(in) :: bounds
type(cnstate_type) , intent(inout) :: cnstate_vars
type(soilstate_type) , intent(in) :: soilstate_vars
!
! !LOCAL VARIABLES
!-- properties of each decomposing pool
real(r8) :: rf_l1s1
real(r8) :: rf_l2s1
real(r8) :: rf_l3s2
!real(r8) :: rf_s1s2(bounds%begc:bounds%endc,1:nlevdecomp)
!real(r8) :: rf_s1s3(bounds%begc:bounds%endc,1:nlevdecomp)
real(r8), allocatable :: rf_s1s2(:,:)
real(r8), allocatable :: rf_s1s3(:,:)
real(r8) :: rf_s2s1
real(r8) :: rf_s2s3
real(r8) :: rf_s3s1
real(r8) :: rf_cwdl2
real(r8) :: rf_cwdl3
real(r8) :: cwd_fcel
real(r8) :: cwd_flig
real(r8) :: cn_s1
real(r8) :: cn_s2
real(r8) :: cn_s3
real(r8) :: np_s1_new
real(r8) :: np_s2_new
real(r8) :: np_s3_new
!real(r8) :: f_s1s2(bounds%begc:bounds%endc,1:nlevdecomp)
!real(r8) :: f_s1s3(bounds%begc:bounds%endc,1:nlevdecomp)
real(r8), allocatable :: f_s1s2(:,:)
real(r8), allocatable :: f_s1s3(:,:)
real(r8) :: f_s2s1
real(r8) :: f_s2s3
integer :: i_litr1
integer :: i_litr2
integer :: i_litr3
integer :: i_soil1
integer :: i_soil2
integer :: i_soil3
integer :: i_l1s1
integer :: i_l2s1
integer :: i_l3s2
integer :: i_s1s2
integer :: i_s1s3
integer :: i_s2s1
integer :: i_s2s3
integer :: i_s3s1
integer :: i_cwdl2
integer :: i_cwdl3
integer :: c, j ! indices
real(r8) :: t ! temporary variable
!-----------------------------------------------------------------------
associate( &
rf_decomp_cascade => cnstate_vars%rf_decomp_cascade_col , & ! Input: [real(r8) (:,:,:) ] respired fraction in decomposition step (frac)
pathfrac_decomp_cascade => cnstate_vars%pathfrac_decomp_cascade_col , & ! Input: [real(r8) (:,:,:) ] what fraction of C leaving a given pool passes through a given transition (frac)
cellsand => soilstate_vars%cellsand_col , & ! Input: [real(r8) (:,:) ] column 3D sand
cascade_step_name => decomp_cascade_con%cascade_step_name , & ! Output: [character(len=8) (:) ] name of transition
cascade_donor_pool => decomp_cascade_con%cascade_donor_pool , & ! Output: [integer (:) ] which pool is C taken from for a given decomposition step
cascade_receiver_pool => decomp_cascade_con%cascade_receiver_pool , & ! Output: [integer (:) ] which pool is C added to for a given decomposition step
floating_cn_ratio_decomp_pools => decomp_cascade_con%floating_cn_ratio_decomp_pools , & ! Output: [logical (:) ] TRUE => pool has fixed C:N ratio
floating_cp_ratio_decomp_pools => decomp_cascade_con%floating_cp_ratio_decomp_pools , & ! Output: [logical (:) ] TRUE => pool has fixed C:P ratio
decomp_pool_name_restart => decomp_cascade_con%decomp_pool_name_restart , & ! Output: [character(len=8) (:) ] name of pool for restart files
decomp_pool_name_history => decomp_cascade_con%decomp_pool_name_history , & ! Output: [character(len=8) (:) ] name of pool for history files
decomp_pool_name_long => decomp_cascade_con%decomp_pool_name_long , & ! Output: [character(len=20) (:) ] name of pool for netcdf long names
decomp_pool_name_short => decomp_cascade_con%decomp_pool_name_short , & ! Output: [character(len=8) (:) ] name of pool for netcdf short names
is_litter => decomp_cascade_con%is_litter , & ! Output: [logical (:) ] TRUE => pool is a litter pool
is_soil => decomp_cascade_con%is_soil , & ! Output: [logical (:) ] TRUE => pool is a soil pool
is_cwd => decomp_cascade_con%is_cwd , & ! Output: [logical (:) ] TRUE => pool is a cwd pool
initial_cn_ratio => decomp_cascade_con%initial_cn_ratio , & ! Output: [real(r8) (:) ] c:n ratio for initialization of pools
initial_cp_ratio => decomp_cascade_con%initial_cp_ratio , & ! Output: [real(r8) (:) ] c:p ratio for initialization of pools
initial_stock => decomp_cascade_con%initial_stock , & ! Output: [real(r8) (:) ] initial concentration for seeding at spinup
is_metabolic => decomp_cascade_con%is_metabolic , & ! Output: [logical (:) ] TRUE => pool is metabolic material
is_cellulose => decomp_cascade_con%is_cellulose , & ! Output: [logical (:) ] TRUE => pool is cellulose
is_lignin => decomp_cascade_con%is_lignin , & ! Output: [logical (:) ] TRUE => pool is lignin
spinup_factor => decomp_cascade_con%spinup_factor & ! Output: [real(r8) (:) ] factor for AD spinup associated with each pool
)
allocate(rf_s1s2(bounds%begc:bounds%endc,1:nlevdecomp))
allocate(rf_s1s3(bounds%begc:bounds%endc,1:nlevdecomp))
allocate(f_s1s2(bounds%begc:bounds%endc,1:nlevdecomp))
allocate(f_s1s3(bounds%begc:bounds%endc,1:nlevdecomp))
!------- time-constant coefficients ---------- !
! set soil organic matter compartment C:N ratios
cn_s1 = DecompBGCParamsInst%cn_s1_bgc
cn_s2 = DecompBGCParamsInst%cn_s2_bgc
cn_s3 = DecompBGCParamsInst%cn_s3_bgc
! set soil organic matter C:P ratios -X. YANG
np_s1_new=DecompBGCParamsInst%np_s1_new_bgc
np_s2_new=DecompBGCParamsInst%np_s2_new_bgc
np_s3_new=DecompBGCParamsInst%np_s3_new_bgc
! set respiration fractions for fluxes between compartments
rf_l1s1 = DecompBGCParamsInst%rf_l1s1_bgc
rf_l2s1 = DecompBGCParamsInst%rf_l2s1_bgc
rf_l3s2 = DecompBGCParamsInst%rf_l3s2_bgc
rf_s2s1 = DecompBGCParamsInst%rf_s2s1_bgc
rf_s2s3 = DecompBGCParamsInst%rf_s2s3_bgc
rf_s3s1 = DecompBGCParamsInst%rf_s3s1_bgc
rf_cwdl2 = DecompBGCParamsInst%rf_cwdl2_bgc
rf_cwdl3 = DecompBGCParamsInst%rf_cwdl3_bgc
! set the cellulose and lignin fractions for coarse woody debris
cwd_fcel = DecompBGCParamsInst%cwd_fcel_bgc
cwd_flig = DecompBGCParamsInst%cwd_flig_bgc
! set path fractions
f_s2s1 = 0.42_r8/(0.45_r8)
f_s2s3 = 0.03_r8/(0.45_r8)
! some of these are dependent on the soil texture properties
do c = bounds%begc, bounds%endc
do j = 1, nlevdecomp
t = 0.85_r8 - 0.68_r8 * 0.01_r8 * (100._r8 - cellsand(c,j))
f_s1s2(c,j) = 1._r8 - .004_r8 / (1._r8 - t)
f_s1s3(c,j) = .004_r8 / (1._r8 - t)
rf_s1s2(c,j) = t
rf_s1s3(c,j) = t
end do
end do
!------------------- list of pools and their attributes ------------
i_litr1 = i_met_lit
floating_cn_ratio_decomp_pools (i_litr1) = .true.
floating_cp_ratio_decomp_pools (i_litr1) = .true.
decomp_pool_name_restart (i_litr1) = 'litr1'
decomp_pool_name_history (i_litr1) = 'LITR1'
decomp_pool_name_long (i_litr1) = 'litter 1'
decomp_pool_name_short (i_litr1) = 'L1'
is_litter (i_litr1) = .true.
is_soil (i_litr1) = .false.
is_cwd (i_litr1) = .false.
initial_cn_ratio (i_litr1) = 90._r8
initial_cp_ratio (i_litr1) = 900._r8
initial_stock (i_litr1) = 0._r8
is_metabolic (i_litr1) = .true.
is_cellulose (i_litr1) = .false.
is_lignin (i_litr1) = .false.
i_litr2 = i_cel_lit
floating_cn_ratio_decomp_pools (i_litr2) = .true.
floating_cp_ratio_decomp_pools (i_litr2) = .true.
decomp_pool_name_restart (i_litr2) = 'litr2'
decomp_pool_name_history (i_litr2) = 'LITR2'
decomp_pool_name_long (i_litr2) = 'litter 2'
decomp_pool_name_short (i_litr2) = 'L2'
is_litter (i_litr2) = .true.
is_soil (i_litr2) = .false.
is_cwd (i_litr2) = .false.
initial_cn_ratio (i_litr2) = 90._r8
initial_cp_ratio (i_litr2) = 900._r8
initial_stock (i_litr2) = 0._r8
is_metabolic (i_litr2) = .false.
is_cellulose (i_litr2) = .true.
is_lignin (i_litr2) = .false.
i_litr3 = i_lig_lit
floating_cn_ratio_decomp_pools (i_litr3) = .true.
floating_cp_ratio_decomp_pools (i_litr3) = .true.
decomp_pool_name_restart (i_litr3) = 'litr3'
decomp_pool_name_history (i_litr3) = 'LITR3'
decomp_pool_name_long (i_litr3) = 'litter 3'
decomp_pool_name_short (i_litr3) = 'L3'
is_litter (i_litr3) = .true.
is_soil (i_litr3) = .false.
is_cwd (i_litr3) = .false.
initial_cn_ratio (i_litr3) = 90._r8
initial_cp_ratio (i_litr3) = 900._r8
initial_stock (i_litr3) = 0._r8
is_metabolic (i_litr3) = .false.
is_cellulose (i_litr3) = .false.
is_lignin (i_litr3) = .true.
! CWD
if (.not.use_fates) then
floating_cn_ratio_decomp_pools (i_cwd) = .true.
floating_cp_ratio_decomp_pools (i_cwd) = .true.
decomp_pool_name_restart (i_cwd) = 'cwd'
decomp_pool_name_history (i_cwd) = 'CWD'
decomp_pool_name_long (i_cwd) = 'coarse woody debris'
decomp_pool_name_short (i_cwd) = 'CWD'
is_litter (i_cwd) = .false.
is_soil (i_cwd) = .false.
is_cwd (i_cwd) = .true.
initial_cn_ratio (i_cwd) = 90._r8
initial_cp_ratio (i_cwd) = 900._r8
initial_stock (i_cwd) = 0._r8
is_metabolic (i_cwd) = .false.
is_cellulose (i_cwd) = .false.
is_lignin (i_cwd) = .false.
end if
if (.not. use_fates) then
i_soil1 = 5
else
i_soil1 = 4
endif
floating_cn_ratio_decomp_pools (i_soil1) = .false.
floating_cp_ratio_decomp_pools (i_soil1) = .true.
decomp_pool_name_restart (i_soil1) = 'soil1'
decomp_pool_name_history (i_soil1) = 'SOIL1'
decomp_pool_name_long (i_soil1) = 'soil 1'
decomp_pool_name_short (i_soil1) = 'S1'
is_litter (i_soil1) = .false.
is_soil (i_soil1) = .true.
is_cwd (i_soil1) = .false.
initial_cn_ratio (i_soil1) = cn_s1
initial_cp_ratio (i_soil1) = cn_s1*np_s1_new
initial_stock (i_soil1) = 20._r8
is_metabolic (i_soil1) = .false.
is_cellulose (i_soil1) = .false.
is_lignin (i_soil1) = .false.
if (.not. use_fates) then
i_soil2 = 6
else
i_soil2 = 5
endif
floating_cn_ratio_decomp_pools (i_soil2) = .false.
floating_cp_ratio_decomp_pools (i_soil2) = .true.
decomp_pool_name_restart (i_soil2) = 'soil2'
decomp_pool_name_history (i_soil2) = 'SOIL2'
decomp_pool_name_long (i_soil2) = 'soil 2'
decomp_pool_name_short (i_soil2) = 'S2'
is_litter (i_soil2) = .false.
is_soil (i_soil2) = .true.
is_cwd (i_soil2) = .false.
initial_cn_ratio (i_soil2) = cn_s2
initial_cp_ratio (i_soil2) = cn_s2*np_s3_new
initial_stock (i_soil2) = 20._r8
is_metabolic (i_soil2) = .false.
is_cellulose (i_soil2) = .false.
is_lignin (i_soil2) = .false.
if (.not. use_fates) then
i_soil3 = 7
else
i_soil3 = 6
endif
floating_cn_ratio_decomp_pools (i_soil3) = .false.
floating_cp_ratio_decomp_pools (i_soil3) = .true.
decomp_pool_name_restart (i_soil3) = 'soil3'
decomp_pool_name_history (i_soil3) = 'SOIL3'
decomp_pool_name_long (i_soil3) = 'soil 3'
decomp_pool_name_short (i_soil3) = 'S3'
is_litter (i_soil3) = .false.
is_soil (i_soil3) = .true.
is_cwd (i_soil3) = .false.
initial_cn_ratio (i_soil3) = cn_s3
initial_cp_ratio (i_soil3) = cn_s3*np_s3_new
initial_stock (i_soil3) = 20._r8
is_metabolic (i_soil3) = .false.
is_cellulose (i_soil3) = .false.
is_lignin (i_soil3) = .false.
spinup_factor(i_litr1) = 1._r8
spinup_factor(i_litr2) = 1._r8
spinup_factor(i_litr3) = 1._r8
!CWD
if (.not. use_fates) then
spinup_factor(i_cwd) = 1._r8
end if
spinup_factor(i_soil1) = DecompBGCParamsInst%spinup_vector(1)
spinup_factor(i_soil2) = DecompBGCParamsInst%spinup_vector(2)
spinup_factor(i_soil3) = DecompBGCParamsInst%spinup_vector(3)
!---------------- list of transitions and their time-independent coefficients ---------------!
i_l1s1 = 1
cascade_step_name(i_l1s1) = 'L1S1'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_l1s1) = rf_l1s1
cascade_donor_pool(i_l1s1) = i_litr1
cascade_receiver_pool(i_l1s1) = i_soil1
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_l1s1) = 1.0_r8
i_l2s1 = 2
cascade_step_name(i_l2s1) = 'L2S1'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_l2s1) = rf_l2s1
cascade_donor_pool(i_l2s1) = i_litr2
cascade_receiver_pool(i_l2s1) = i_soil1
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_l2s1)= 1.0_r8
i_l3s2 = 3
cascade_step_name(i_l3s2) = 'L3S2'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_l3s2) = rf_l3s2
cascade_donor_pool(i_l3s2) = i_litr3
cascade_receiver_pool(i_l3s2) = i_soil2
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_l3s2) = 1.0_r8
i_s1s2 = 4
cascade_step_name(i_s1s2) = 'S1S2'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s1s2) = rf_s1s2(bounds%begc:bounds%endc,1:nlevdecomp)
cascade_donor_pool(i_s1s2) = i_soil1
cascade_receiver_pool(i_s1s2) = i_soil2
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s1s2) = f_s1s2(bounds%begc:bounds%endc,1:nlevdecomp)
i_s1s3 = 5
cascade_step_name(i_s1s3) = 'S1S3'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s1s3) = rf_s1s3(bounds%begc:bounds%endc,1:nlevdecomp)
cascade_donor_pool(i_s1s3) = i_soil1
cascade_receiver_pool(i_s1s3) = i_soil3
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s1s3) = f_s1s3(bounds%begc:bounds%endc,1:nlevdecomp)
i_s2s1 = 6
cascade_step_name(i_s2s1) = 'S2S1'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s2s1) = rf_s2s1
cascade_donor_pool(i_s2s1) = i_soil2
cascade_receiver_pool(i_s2s1) = i_soil1
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s2s1) = f_s2s1
i_s2s3 = 7
cascade_step_name(i_s2s3) = 'S2S3'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s2s3) = rf_s2s3
cascade_donor_pool(i_s2s3) = i_soil2
cascade_receiver_pool(i_s2s3) = i_soil3
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s2s3) = f_s2s3
i_s3s1 = 8
cascade_step_name(i_s3s1) = 'S3S1'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s3s1) = rf_s3s1
cascade_donor_pool(i_s3s1) = i_soil3
cascade_receiver_pool(i_s3s1) = i_soil1
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_s3s1) = 1.0_r8
if (.not. use_fates) then
i_cwdl2 = 9
cascade_step_name(i_cwdl2) = 'CWDL2'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_cwdl2) = rf_cwdl2
cascade_donor_pool(i_cwdl2) = i_cwd
cascade_receiver_pool(i_cwdl2) = i_litr2
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_cwdl2) = cwd_fcel
i_cwdl3 = 10
cascade_step_name(i_cwdl3) = 'CWDL3'
rf_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_cwdl3) = rf_cwdl3
cascade_donor_pool(i_cwdl3) = i_cwd
cascade_receiver_pool(i_cwdl3) = i_litr3
pathfrac_decomp_cascade(bounds%begc:bounds%endc,1:nlevdecomp,i_cwdl3) = cwd_flig
end if
deallocate(rf_s1s2)
deallocate(rf_s1s3)
deallocate(f_s1s2)
deallocate(f_s1s3)
end associate
end subroutine init_decompcascade_bgc
!-----------------------------------------------------------------------
subroutine decomp_rate_constants_bgc(bounds, num_soilc, filter_soilc, &
canopystate_vars, soilstate_vars, temperature_vars, ch4_vars, carbonflux_vars, cnstate_vars)
!
! !DESCRIPTION:
! calculate rate constants and decomposition pathways for teh CENTURY decomposition cascade model
! written by C. Koven based on original CLM4 decomposition cascade
!
! !USES:
use clm_time_manager , only : get_days_per_year, get_curr_date, get_step_size
use shr_const_mod , only : SHR_CONST_PI
use clm_varcon , only : denh2o, denice, secspday
!
! !ARGUMENTS:
type(bounds_type) , intent(in) :: bounds
integer , intent(in) :: num_soilc ! number of soil columns in filter
integer , intent(in) :: filter_soilc(:) ! filter for soil columns
type(canopystate_type) , intent(in) :: canopystate_vars
type(soilstate_type) , intent(in) :: soilstate_vars
type(temperature_type) , intent(in) :: temperature_vars
type(ch4_type) , intent(in) :: ch4_vars
type(carbonflux_type) , intent(inout) :: carbonflux_vars
type(cnstate_type) , intent(inout) :: cnstate_vars
!
! !LOCAL VARIABLES:
real(r8):: frw(bounds%begc:bounds%endc) ! rooting fraction weight
real(r8), allocatable:: fr(:,:) ! column-level rooting fraction by soil depth
real(r8):: minpsi, maxpsi ! limits for soil water scalar for decomp
real(r8):: psi ! temporary soilpsi for water scalar
real(r8):: rate_scalar ! combined rate scalar for decomp
real(r8):: k_l1 ! decomposition rate constant litter 1 (1/sec)
real(r8):: k_l2_l3 ! decomposition rate constant litter 2 and litter 3 (1/sec)
real(r8):: k_s1 ! decomposition rate constant SOM 1 (1/sec)
real(r8):: k_s2 ! decomposition rate constant SOM 2 (1/sec)
real(r8):: k_s3 ! decomposition rate constant SOM 3 (1/sec)
real(r8):: k_frag ! fragmentation rate constant CWD (1/sec)
real(r8):: tau_l1 ! turnover time of litter 1 (yr)
real(r8):: tau_l2_l3 ! turnover time of litter 2 and litter 3 (yr)
real(r8):: tau_l3 ! turnover time of litter 3 (yr)
real(r8):: tau_s1 ! turnover time of SOM 1 (yr)
real(r8):: tau_s2 ! turnover time of SOM 2 (yr)
real(r8):: tau_s3 ! turnover time of SOM 3 (yr)
real(r8):: tau_cwd ! corrected fragmentation rate constant CWD
real(r8):: cwdc_loss ! fragmentation rate for CWD carbon (gC/m2/s)
real(r8):: cwdn_loss ! fragmentation rate for CWD nitrogen (gN/m2/s)
real(r8):: Q10 ! temperature dependence
real(r8):: froz_q10 ! separate q10 for frozen soil respiration rates. default to same as above zero rates
real(r8):: decomp_depth_efolding ! (meters) e-folding depth for reduction in decomposition [
integer :: i_litr1
integer :: i_litr2
integer :: i_litr3
integer :: i_soil1
integer :: i_soil2
integer :: i_soil3
integer :: c, fc, j, k, l
real(r8):: catanf ! hyperbolic temperature function from CENTURY
real(r8):: catanf_30 ! reference rate at 30C
real(r8):: t1 ! temperature argument
real(r8):: normalization_factor ! factor by which to offset the decomposition rates frm century to a q10 formulation
real(r8):: days_per_year ! days per year
real(r8):: depth_scalar(bounds%begc:bounds%endc,1:nlevdecomp)
real(r8):: mino2lim !minimum anaerobic decomposition rate
integer :: year, mon, day, sec ! fraction of potential aerobic rate
real(r8):: dt ! decomp timestep (seconds)
real(r8) :: vsm_pec
!-----------------------------------------------------------------------
!----- CENTURY T response function
catanf(t1) = 11.75_r8 +(29.7_r8 / SHR_CONST_PI) * atan( SHR_CONST_PI * 0.031_r8 * ( t1 - 15.4_r8 ))
associate( &
watsat => soilstate_vars%watsat_col , & ! Input: [real(r8) (:,:) ] volumetric soil water at saturation (porosity)
sucsat => soilstate_vars%sucsat_col , & ! Input: [real(r8) (:,:) ] minimum soil suction (mm)
soilpsi => soilstate_vars%soilpsi_col , & ! Input: [real(r8) (:,:) ] soil water potential in each soil layer (MPa)
alt_indx => canopystate_vars%alt_indx_col , & ! Input: [integer (:) ] current depth of thaw
t_soisno => col_es%t_soisno , & ! Input: [real(r8) (:,:) ] soil temperature (Kelvin) (-nlevsno+1:nlevgrnd)
dz => col_pp%dz , & ! Input: [real(r8) (:,:) ] layer thickness (m)
h2osoi_liq => col_ws%h2osoi_liq , & ! Input: [real(r8) (:,:) ] liquid water (kg/m2) (new)
o2stress_sat => ch4_vars%o2stress_sat_col , & ! Input: [real(r8) (:,:) ] Ratio of oxygen available to that demanded by roots, aerobes, & methanotrophs (nlevsoi)
o2stress_unsat => ch4_vars%o2stress_unsat_col , & ! Input: [real(r8) (:,:) ] Ratio of oxygen available to that demanded by roots, aerobes, & methanotrophs (nlevsoi)
finundated => ch4_vars%finundated_col , & ! Input: [real(r8) (:) ] fractional inundated area
t_scalar => col_cf%t_scalar , & ! Output: [real(r8) (:,:) ] soil temperature scalar for decomp
w_scalar => col_cf%w_scalar , & ! Output: [real(r8) (:,:) ] soil water scalar for decomp
o_scalar => col_cf%o_scalar , & ! Output: [real(r8) (:,:) ] fraction by which decomposition is limited by anoxia
decomp_k => col_cf%decomp_k , & ! Output: [real(r8) (:,:,:) ] rate constant for decomposition (1./sec)
decomp_k_pools => decomp_cascade_con%decomp_k_pools & !(0: ndecomp_pools) ! pflotran (0 for atm. co2)
)
mino2lim = ParamsShareInst%mino2lim
if ( use_century_tfunc .and. normalize_q10_to_century_tfunc ) then
call endrun(msg='ERROR: cannot have both use_century_tfunc and normalize_q10_to_century_tfunc set as true'//&
errMsg(__FILE__, __LINE__))
endif
days_per_year = get_days_per_year()
dt = real( get_step_size(), r8 )
! the belowground parameters from century
tau_l1 = 1./18.5
tau_l2_l3 = 1./4.9
tau_s1 = 1./7.3
tau_s2 = 1./0.2
tau_s3 = 1./.0045
! century leaves wood decomposition rates open, within range of 0 - 0.5 yr^-1
tau_cwd = 1./0.3
! Todo: FIX(SPM,032414) - the explicit divide gives different results than when that
! value is placed in the parameters netcdf file. To get bfb, keep the
! divide in source.
!tau_l1 = DecompBGCParamsInst%tau_l1_bgc
!tau_l2_l3 = DecompBGCParamsInst%tau_l2_l3_bgc
!tau_s1 = DecompBGCParamsInst%tau_s1_bgc
!tau_s2 = DecompBGCParamsInst%tau_s2_bgc
!tau_s3 = DecompBGCParamsInst%tau_s3_bgc
!set turnover rate of coarse woody debris
!tau_cwd = DecompBGCParamsInst%tau_cwd_bgc
! set "Q10" parameter
Q10 = ParamsShareInst%Q10_hr
! set "froz_q10" parameter
froz_q10 = ParamsShareInst%froz_q10
! Set "decomp_depth_efolding" parameter
decomp_depth_efolding = ParamsShareInst%decomp_depth_efolding
! translate to per-second time constant
k_l1 = 1._r8 / (secspday * days_per_year * tau_l1)
k_l2_l3 = 1._r8 / (secspday * days_per_year * tau_l2_l3)
k_s1 = 1._r8 / (secspday * days_per_year * tau_s1)
k_s2 = 1._r8 / (secspday * days_per_year * tau_s2)
k_s3 = 1._r8 / (secspday * days_per_year * tau_s3)
k_frag = 1._r8 / (secspday * days_per_year * tau_cwd)
! calc ref rate
catanf_30 = catanf(30._r8)
i_litr1 = 1
i_litr2 = 2
i_litr3 = 3
if (.not.use_fates) then
i_soil1 = 5
i_soil2 = 6
i_soil3 = 7
else
i_soil1 = 4
i_soil2 = 5
i_soil3 = 6
end if
! pflotran:beg---saving orignal k (not scaled) for passing to pflotran bgc decomposition sandboxes
decomp_k_pools(i_litr1) = k_l1
decomp_k_pools(i_litr2) = k_l2_l3
decomp_k_pools(i_litr3) = k_l2_l3
decomp_k_pools(i_cwd) = k_frag
decomp_k_pools(i_soil1) = k_s1
decomp_k_pools(i_soil2) = k_s2
decomp_k_pools(i_soil3) = k_s3
! pflotran:end
! The following code implements the acceleration part of the AD spinup algorithm
if ( spinup_state .eq. 1 ) then
k_s1 = k_s1 * DecompBGCParamsInst%spinup_vector(1)
k_s2 = k_s2 * DecompBGCParamsInst%spinup_vector(2)
k_s3 = k_s3 * DecompBGCParamsInst%spinup_vector(3)
endif
!--- time dependent coefficients-----!
if ( nlevdecomp .eq. 1 ) then
! calculate function to weight the temperature and water potential scalars
! for decomposition control.
! the following normalizes values in fr so that they
! sum to 1.0 across top nlevdecomp levels on a column
frw(bounds%begc:bounds%endc) = 0._r8
nlev_soildecomp_standard=5
allocate(fr(bounds%begc:bounds%endc,nlev_soildecomp_standard))
do j=1,nlev_soildecomp_standard
do fc = 1,num_soilc
c = filter_soilc(fc)
frw(c) = frw(c) + col_pp%dz(c,j)
end do
end do
do j = 1,nlev_soildecomp_standard
do fc = 1,num_soilc
c = filter_soilc(fc)
if (frw(c) /= 0._r8) then
fr(c,j) = col_pp%dz(c,j) / frw(c)
else
fr(c,j) = 0._r8
end if
end do
end do
if ( .not. use_century_tfunc ) then !use_century_tfunc = .false.
! calculate rate constant scalar for soil temperature
! assuming that the base rate constants are assigned for non-moisture
! limiting conditions at 25 C.
do j = 1,nlev_soildecomp_standard
do fc = 1,num_soilc
c = filter_soilc(fc)
if (j==1) t_scalar(c,:) = 0._r8
if (t_soisno(c,j) >= SHR_CONST_TKFRZ) then
t_scalar(c,1)=t_scalar(c,1) + &
(Q10**((t_soisno(c,j)-(SHR_CONST_TKFRZ+25._r8))/10._r8))*fr(c,j)
else
t_scalar(c,1)=t_scalar(c,1) + &
(Q10**(-25._r8/10._r8))*(froz_q10**((t_soisno(c,j)-SHR_CONST_TKFRZ)/10._r8))*fr(c,j)
endif
end do
end do
else
! original century uses an arctangent function to calculate the temperature dependence of decomposition
do j = 1,nlev_soildecomp_standard
do fc = 1,num_soilc
c = filter_soilc(fc)
if (j==1) t_scalar(c,:) = 0._r8
t_scalar(c,1)=t_scalar(c,1) +max(catanf(t_soisno(c,j)-SHR_CONST_TKFRZ)/catanf_30*fr(c,j),0.01_r8)
end do
end do
endif
! calculate the rate constant scalar for soil water content.
! Uses the log relationship with water potential given in
! Andren, O., and K. Paustian, 1987. Barley straw decomposition in the field:
! a comparison of models. Ecology, 68(5):1190-1200.
! and supported by data in
! Orchard, V.A., and F.J. Cook, 1983. Relationship between soil respiration
! and soil moisture. Soil Biol. Biochem., 15(4):447-453.
minpsi = -10.0_r8
do j = 1,nlev_soildecomp_standard
do fc = 1,num_soilc
c = filter_soilc(fc)
if (j==1) w_scalar(c,:) = 0._r8
maxpsi = sucsat(c,j) * (-9.8e-6_r8)
psi = min(soilpsi(c,j),maxpsi)
! decomp only if soilpsi is higher than minpsi
if (psi > minpsi) then
w_scalar(c,1) = w_scalar(c,1) + (log(minpsi/psi)/log(minpsi/maxpsi))*fr(c,j)
end if
end do
end do
if (use_lch4) then
if (anoxia_wtsat) then ! Adjust for saturated fraction if unfrozen
do fc = 1,num_soilc
c = filter_soilc(fc)
if (alt_indx(c) >= nlev_soildecomp_standard .and. t_soisno(c,1) > SHR_CONST_TKFRZ) then
w_scalar(c,1) = w_scalar(c,1)*(1._r8 - finundated(c)) + finundated(c)
end if
end do
end if
end if
if (use_lch4) then
! Calculate ANOXIA
if (anoxia) then
! Check for anoxia w/o LCH4 now done in controlMod.
do j = 1,nlev_soildecomp_standard
do fc = 1,num_soilc
c = filter_soilc(fc)
if (j==1) o_scalar(c,:) = 0._r8
if (.not. anoxia_wtsat) then
o_scalar(c,1) = o_scalar(c,1) + fr(c,j) * max(o2stress_unsat(c,j), mino2lim)
else
o_scalar(c,1) = o_scalar(c,1) + fr(c,j) * &
(max(o2stress_unsat(c,j), mino2lim)*(1._r8 - finundated(c)) + &
max(o2stress_sat(c,j), mino2lim)*finundated(c) )
end if
end do
end do
else
o_scalar(bounds%begc:bounds%endc,1:nlevdecomp) = 1._r8
end if
else
o_scalar(bounds%begc:bounds%endc,1:nlevdecomp) = 1._r8
end if
deallocate(fr)
else !
if ( .not. use_century_tfunc ) then !use_century_tfunc = .false.
! calculate rate constant scalar for soil temperature
! assuming that the base rate constants are assigned for non-moisture
! limiting conditions at 25 C.
! Peter Thornton: 3/13/09
! Replaced the Lloyd and Taylor function with a Q10 formula, with Q10 = 1.5
! as part of the modifications made to improve the seasonal cycle of
! atmospheric CO2 concentration in global simulations. This does not impact
! the base rates at 25 C, which are calibrated from microcosm studies.
!SHR_CONST_TKFRZ = 273.15K
do j = 1, nlevdecomp
do fc = 1,num_soilc
c = filter_soilc(fc)
!if (t_soisno(c,j) >= SHR_CONST_TKFRZ) then
! t_scalar(c,j)= (Q10**((t_soisno(c,j)-(SHR_CONST_TKFRZ+25._r8))/10._r8))
!else
! t_scalar(c,j)= (Q10**(-25._r8/10._r8))*(froz_q10**((t_soisno(c,j)-SHR_CONST_TKFRZ)/10._r8))
!endif
if (t_soisno(c,j) >= (SHR_CONST_TKFRZ -30._r8)) then
!Century 1, Burke et al. [2003]
!t_scalar(c,j) = (((45._r8-(t_soisno(c,j)-SHR_CONST_TKFRZ))/(45._r8-35._r8))**0.2)* &
! exp((0.2/2.63)*(1-((45._r8-(t_soisno(c,j)-SHR_CONST_TKFRZ))/(45._r8-35._r8))**2.63))
!Century 2, Adair et al. [2008]
!t_scalar(c,j) = 3.439*exp((0.2/2.63)*(1._r8-((45._r8-(t_soisno(c,j)-SHR_CONST_TKFRZ))/(45._r8-35._r8))**2.63)* &
! ((45._r8-(t_soisno(c,j)-SHR_CONST_TKFRZ))/(45._r8-35._r8))**0.2)
!Daycent1, Kelly et al. [2000]
!t_scalar(c,j) = 0.08*exp(0.095*(t_soisno(c,j)-SHR_CONST_TKFRZ))
!Daycent2, Parton et al. [2001[and Grosso et al. [2005]
!t_scalar(c,j) = max(0.56+(1.46*atan(SHR_CONST_PI*0.0309*(t_soisno(c,j)-SHR_CONST_TKFRZ-15.7)))/SHR_CONST_PI, 0._r8)
!Q10=2.0(Tref=10)
!t_scalar(c,j) = 2.0**((t_soisno(c,j)-SHR_CONST_TKFRZ-10._r8)/10._r8)
!Q10=1.4(Tref=10)
!t_scalar(c,j) = 1.4**((t_soisno(c,j)-SHR_CONST_TKFRZ-10._r8)/10._r8)
!Lloyd and Taylor, Lloyd and Taylor [1994]
!t_scalar(c,j) = max(exp(308.56*(1._r8/56.02-1._r8/((t_soisno(c,j)-SHR_CONST_TKFRZ+273._r8)-227.13))), 0._r8)
!Kirschbaum,Kirschbaum [1995]
!t_scalar(c,j) = exp(-3.764+0.204*(t_soisno(c,j)-SHR_CONST_TKFRZ)*(1._r8-0.5*(t_soisno(c,j)-SHR_CONST_TKFRZ)/36.9))
!Demeter, Foley [2011]
!t_scalar(c,j) = exp((log(2._r8)/10._r8)*(t_soisno(c,j)-SHR_CONST_TKFRZ-20))
!Standcarb, Harmon and Domingo [2001]
!t_scalar(c,j) = exp(-1._r8*((t_soisno(c,j)-SHR_CONST_TKFRZ)/(45._r8+4._r8))**15._r8)*2.0**(((t_soisno(c,j)-SHR_CONST_TKFRZ)-10._r8)/10._r8)
!TWfun27:Q10=1.3(Tref=25)
!t_scalar(c,j) = 1.3**((t_soisno(c,j)-SHR_CONST_TKFRZ-25._r8)/10._r8)
!TWfun28:Q10=1.4(Tref=25)
!t_scalar(c,j) = 1.4**((t_soisno(c,j)-SHR_CONST_TKFRZ-25._r8)/10._r8)
!TWfun29:Q10=1.5(Tref=25), Same as Default
!t_scalar(c,j) = 1.5**((t_soisno(c,j)-SHR_CONST_TKFRZ-25._r8)/10._r8)
!TWfun30:Q10=2(Tref=25)
t_scalar(c,j) = 2.0**((t_soisno(c,j)-SHR_CONST_TKFRZ-25._r8)/10._r8)
!TWfun31:Q10=1.5(Tref=35)
!t_scalar(c,j) = 1.5**((t_soisno(c,j)-SHR_CONST_TKFRZ-35._r8)/10._r8)
!TWfun32:Q10=2(Tref=35)
!t_scalar(c,j) = 2.0**((t_soisno(c,j)-SHR_CONST_TKFRZ-35._r8)/10._r8)
else
t_scalar(c,j) = 0.0
endif
end do
end do
else
do j = 1, nlevdecomp
do fc = 1,num_soilc
c = filter_soilc(fc)
t_scalar(c,j)= max(catanf(t_soisno(c,j)-SHR_CONST_TKFRZ)/catanf_30, 0.01_r8)
end do