BEGSIM 
  SPECIES

      Solution
 SO2, H2SO4
 DMS -> CH3SCH3, H2O2
 SO4_NA->H2SO4, SO4_A1->H2SO4, SO4_A2->NH4HSO4
 SO4_AC->H2SO4, SO4_PR->H2SO4, BC_N->C
 BC_AX->C, BC_NI->C, BC_A->C, BC_AI->C 
 BC_AC->C, OM_NI->C, OM_AI->C, OM_AC->C
 DST_A2->AlSiO5, DST_A3->AlSiO5
 SS_A1->NaCl, SS_A2->NaCl, SS_A3->NaCl
* Approximate soa species with those of monoterpene oxidation products
* based on Paasonen et al. (2010); Taipale et al. (2008). 
 SOA_NA->C10H16O2, SOA_A1->C10H16O2
 SOA_LV ->C10H16O2, SOA_SV->C10H16O2
 monoterp -> C10H16, isoprene -> C5H8
 H2O
   End Solution

      Fixed
 M, N2, O2, O3, OH, NO3, HO2
      End Fixed

      Col-int
 O3 = 0.
 O2 = 0.
      End Col-int

   End SPECIES

   Solution Classes
      Explicit
      End Explicit
      Implicit
        DMS, SO2, H2O2
        SO4_NA, SO4_A1, SO4_A2
        SO4_AC, SO4_PR, BC_N
        BC_AX, BC_NI, BC_A, BC_AI 
        BC_AC, OM_NI, OM_AI, OM_AC
        DST_A2, DST_A3
        SS_A1, SS_A2, SS_A3 , H2SO4
        SOA_NA, SOA_A1
	SOA_LV,SOA_SV, monoterp, isoprene
        H2O
      End Implicit
   End Solution Classes

 CHEMISTRY
      Photolysis
 [jh2o2]    H2O2 + hv ->
      End Photolysis

      Reactions
 [usr_HO2_HO2] HO2 + HO2 -> H2O2
               H2O2 + OH -> H2O + HO2                                           ; 2.9e-12, -160
               DMS + OH -> SO2                                                  ; 9.6e-12, -234.
               DMS + NO3 -> SO2 + HNO3                                          ; 1.9e-13,  520.
               SO2 + OH + M -> H2SO4 + M                                      ; 3.0e-31, 3.3, 1.5e-12, 0.0, 0.6
* SOA has MW=168, and MSA=96, so to get correct MSA mass ==> factor of 96/168 = 0.57
* Then account for 0.25 which is 0.25 MSA molec per DMS molec (the other 0.75 goes to SO2)
* Then 0.2 assumed yield for SOA_LV and 0.8 assumed  yield for SOA_SV gives the coefficients below
* reaction rate from Chin et al 1996, JGR, vol 101, no D13
* 
 [usr_DMS_OH]  DMS + OH -> .75 * SO2 + .5 * HO2 + 0.029*SOA_LV + 0.114*SOA_SV
*
*cka: added organic vapor oxidation with constants from IUPAC below
*     Assume a  yield of 15% for SOA LV production from these reactions
*     Assume a  yield of 15 % for monoterpene and 5% for isoprene SOA SV production reactions
*     SOA_LV: very low volatility, can nucleate or grow small particles (oxidation products from O3+monoterp)
*     SOA_SV: rest of SOA formed
	       monoterp + O3 -> .15*SOA_LV 			; 8.05e-16, -640.
	       monoterp + OH -> .15*SOA_SV			; 1.2e-11, 440.
	       monoterp + NO3 -> .15*SOA_SV			; 1.2e-12, 490.
	       isoprene + O3 -> .05*SOA_SV			; 1.03e-14, -1995.
	       isoprene + OH -> .05*SOA_SV 			; 2.7e-11, 390.
	       isoprene + NO3 -> .05*SOA_SV 			; 3.15e-12, -450.
      End Reactions

      Heterogeneous
          H2O2, SO2
      End Heterogeneous

      Ext Forcing
          SO2 <- dataset
          BC_NI <-dataset
          BC_AX <-dataset
          BC_N <-dataset
          OM_NI <-dataset
          SO4_PR <-dataset
          H2O <- dataset
      End Ext Forcing

   END CHEMISTRY

   SIMULATION PARAMETERS

     Version Options
        model   = cam
        machine = intel
        architecture = hybrid
        vec_ftns  = on
        multitask = on
        namemod = on
        modules = on
     End Version Options

   END SIMULATION PARAMETERS
ENDSIM