! $Id: aerophys.F90 5202 2024-09-20 10:32:04Z fhourdin $
!
MODULE aerophys
!
  IMPLICIT NONE
!
  REAL,PARAMETER    :: ropx=1500.0              ! default aerosol particle mass density [kg/m3]
  REAL,PARAMETER    :: dens_aer_dry=1848.682308 ! dry aerosol particle mass density at T_0=293K[kg/m3]
  REAL,PARAMETER    :: dens_aer_ref=1483.905336 ! aerosol particle mass density with 75% H2SO4 at T_0=293K[kg/m3]
  REAL,PARAMETER    :: mdwmin=0.002e-6          ! dry diameter of smallest aerosol particles [m]
  REAL,PARAMETER    :: V_rat=2.0                ! volume ratio of neighboring size bins
  REAL,PARAMETER    :: mfrac_H2SO4=0.75         ! default mass fraction of H2SO4 in the aerosol
  REAL, PARAMETER   :: mAIRmol=28.949*1.66E-27  ! Average mass of an air molecule [kg]
  REAL, PARAMETER   :: mH2Omol=18.016*1.66E-27  ! Mass of an H2O molecule [kg]
  REAL, PARAMETER   :: mH2SO4mol=98.082*1.66E-27! Mass of an H2SO4 molecule [kg]
  REAL, PARAMETER   :: mSO2mol=64.06*1.66E-27   ! Mass of an SO2 molecule [kg]
  REAL, PARAMETER   :: mSatom=32.06*1.66E-27    ! Mass of a S atom [kg]
  REAL, PARAMETER   :: mOCSmol=60.07*1.66E-27   ! Mass of an OCS molecule [kg]
  REAL, PARAMETER   :: mClatom=35.45*1.66E-27   ! Mass of an Cl atom [kg]
  REAL, PARAMETER   :: mHClmol=36.46*1.66E-27   ! Mass of an HCl molecule [kg]
  REAL, PARAMETER   :: mBratom=79.90*1.66E-27   ! Mass of an Br atom [kg]
  REAL, PARAMETER   :: mHBrmol=80.92*1.66E-27   ! Mass of an HBr molecule [kg]
  REAL, PARAMETER   :: mNOmol=30.01*1.66E-27    ! Mass of an NO molecule [kg]
  REAL, PARAMETER   :: mNO2mol=46.01*1.66E-27   ! Mass of an NO2 molecule [kg]
  REAL, PARAMETER   :: mNatome=14.0067*1.66E-27 ! Mass of an N atome [kg]
  REAL, PARAMETER   :: rgas=8.3145 ! molar gas cste (J⋅K−1⋅mol−1=m3⋅Pa⋅K−1⋅mol−1=kg⋅m2⋅s−2⋅K−1⋅mol−1)
  ! 
  REAL, PARAMETER   :: MH2O  =1000.*mH2Omol     ! Mass of 1 molec [g] (18.016*1.66E-24)
  REAL, PARAMETER   :: MH2SO4=1000.*mH2SO4mol   ! Mass of 1 molec [g] (98.082*1.66E-24)
  REAL, PARAMETER   :: BOLZ  =1.381E-16         ! Boltzmann constant [dyn.cm/K]
!
END MODULE aerophys