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module_data_gigc_asect.F
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module_data_gigc_asect.F
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module module_data_gigc_asect
implicit none
!-----------------------------------------------------------------------
!
! The variables in this module provide a means of organizing and accessing
! aerosol species in the "chem" array by their chemical component,
! size bin (or mode), "type", and "phase"
!
! Their purpose is to allow flexible coding of process modules,
! compared to "hard-coding" using the chem array p_xxx indices
! (e.g., p_diag_so4_a1, p_diag_so4_a2, ...; p_diag_num_a1, ...)
!
!-----------------------------------------------------------------------
!
! maxd_atype = maximum allowable number of aerosol types
! maxd_asize = maximum allowable number of aerosol size bins
! maxd_acomp = maximum allowable number of chemical components
! in each aerosol size bin
! maxd_aphase = maximum allowable number of aerosol phases
! (gas, cloud, ice, rain, ...)
!
! ntype_aer = number of aerosol types
! The current GEOS-Chem aerosol scheme has only 1 type, with the
! implicit assumption of internal mixing.
!
! nphase_aer = number of aerosol phases
!
! ai_phase = phase (p) index for interstitial (unactivated) aerosol particles
! cw_phase = phase (p) index for aerosol particles in cloud water
! ci_phase = phase (p) index for aerosol particles in cloud ice
! rn_phase = phase (p) index for aerosol particles in rain
! sn_phase = phase (p) index for aerosol particles in snow
! gr_phase = phase (p) index for aerosol particles in graupel
! [Note: the value of "xx_phase" will be between 1 and nphase_aer
! for phases that are active in a simulation. The others
! will have non-positive values.]
! nsize_aer(t) = number of aerosol size bins for aerosol type t
!
! ncomp_aer(t) = number of "regular" chemical components for aerosol type t
! massptr_aer(c,s,t,p) = the position/index in the chem array for mixing-
! ratio for chemical component c, size bin s, type t, and phase p.
!
! lptr_so4_aer(s,t,p) = the position/index in the chem array for mixing-
! ratio for sulfate for aerosol size bin s, type t, and phase p
! (similar lptr's are defined for no3, cl, msa, co3,
! nh4, na, ca, oin, oc, bc, ...)
! [Note: the massptr_aer allow you to loop over all species of
! an aerosol type. The lptr_so4_aer, etc., allow you to access
! a specific chemical component.]
! numptr_aer(s,t,p) = the position/index in the chem array for mixing-
! ratio of particle number for size bin s, type t, and phase p.
! dens_aer(c,t) = dry density (g/cm^3) of aerosol chemical component
! c of type t
! mw_aer(c,t) = molecular weight (g/mole) of aerosol chemical component
! c of type t
! hygro_aer(c,t) = bulk hygroscopicity (--) at dilute conditions
! (RH near 100%) of aerosol chemical component c of type t
! [For definition of bulk hygroscopicity,
! see Abdul-Razzak and Ghan, 2004, J Geophys Res, V105, p. 6837-6844.]
! dlo_sect(s,t) = 1-particle diameter (cm) at lower boundary of section m
! dhi_sect(s,t) = 1-particle diameter (cm) at upper boundary of section m
!-----------------------------------------------------------------------
integer, parameter :: maxd_atype = 1
integer, parameter :: maxd_asize = 4
integer, parameter :: maxd_acomp = 10
integer, parameter :: maxd_aphase = 2
integer, save :: ai_phase = -999888777
integer, save :: cw_phase = -999888777
integer, save :: msectional = 1
integer, save :: ntype_aer = 1 ! number of types
integer, save :: nphase_aer = 2 ! number of phases
integer, save :: nsize_aer( maxd_atype ) ! number of size bins
integer, save :: ncomp_aer( maxd_atype ) ! number of chemical components
integer, save :: massptr_aer( maxd_acomp, maxd_asize, maxd_atype, maxd_aphase ), &
! index for mixing ratio
numptr_aer( maxd_asize, maxd_atype, maxd_aphase ), & ! index for the number mixing ratio
waterptr_aer( maxd_asize, maxd_atype ) ! index for aerosol water
real, save :: dens_aer( maxd_acomp, maxd_atype), & ! unit: g/cm^3
mw_aer( maxd_acomp, maxd_atype), & ! unit: g/mol
hygro_aer( maxd_acomp, maxd_atype), & ! unitless
dcen_sect( maxd_asize, maxd_atype), & ! unit: cm
dlo_sect( maxd_asize, maxd_atype), & ! unit: cm
dhi_sect( maxd_asize, maxd_atype), & ! unit: cm
sigmag_aer(maxd_asize, maxd_atype)
! dry densities (g/cm^3)
real, parameter :: dens_so4_aer_gc = 1.7
real, parameter :: dens_nit_aer_gc = 1.8
real, parameter :: dens_nh4_aer_gc = 1.8
real, parameter :: dens_oc_aer_gc = 1.3
real, parameter :: dens_bc_aer_gc = 1.8
real, parameter :: dens_seas_aer_gc = 2.2
real, parameter :: dens_dst1_aer_gc = 2.5
real, parameter :: dens_dst2_aer_gc = 2.65
real, parameter :: dens_dst3_aer_gc = 2.65
real, parameter :: dens_dst4_aer_gc = 2.65
real, parameter :: dens_soas_aer_gc = 1.5 ! dens based on Murphy and Pandis, ES&T, 2009
real, parameter :: dens_water_aer_gc= 1.0
! molecular weight (g/mol)
real, parameter :: mw_so4_aer = 96.0
real, parameter :: mw_nit_aer = 62.0
real, parameter :: mw_nh4_aer = 18.0
real, parameter :: mw_oc_aer = 12.0
real, parameter :: mw_bc_aer = 12.0
real, parameter :: mw_seas_aer = 31.4
real, parameter :: mw_dst_aer = 29.0
real, parameter :: mw_soas_aer = 150.0
real, parameter :: mw_water_aer = 18.0
! hygroscopicity (dimensionless)
real, parameter :: hygro_so4_aer = 0.5
real, parameter :: hygro_nit_aer = 0.5
real, parameter :: hygro_nh4_aer = 0.5
real, parameter :: hygro_oc_aer = 0.2
real, parameter :: hygro_bc_aer = 1.E-6
real, parameter :: hygro_seas_aer = 1.16
real, parameter :: hygro_dst_aer = 0.14
real, parameter :: hygro_soas_aer = 0.14
end module module_data_gigc_asect