* reduced HC mechanism, based on Houweling et al. with ACCMIP modifications by JFL
* corrected 12/20/2016 (LKE); no halogens

      SPECIES

      Solution
        O3, O, O1D -> O
        N2O, N, NO, NO2, NO3, HNO3, HO2NO2, N2O5
        CH4, CH3O2, CH3OOH, CH2O, CO
        H2, H2O, OH, HO2, H2O2
        CH3CHO, C2O3, PAN -> CH3CO3NO2, PAR -> C, ROR -> CH3O
        OLE -> C2, C2H4, CH3COCHO, ISOP -> C5H8, ROOH -> CH3COCH2OOH
        ONIT -> CH3COCH2ONO2, XO2 -> H, XO2N -> H, RXPAR -> H
        C10H16, TOLUENE -> C7H8, SOA -> C12
        CB1 -> C, CB2 -> C, SO2, SO4, DMS -> CH3SCH3, NH3, NH4, NH4NO3
        OC1 -> C, OC2 -> C
        CO2
        SSLT01 -> NaCl, SSLT02 -> NaCl, SSLT03 -> NaCl, SSLT04 -> NaCl
        DST01 -> AlSiO5, DST02 -> AlSiO5, DST03 -> AlSiO5, DST04 -> AlSiO5
      End Solution

      Fixed
        M, N2, O2
      End Fixed

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

   End SPECIES

   Solution Classes
      Explicit
       CH4, N2O, CO, H2
       CO2
      End Explicit
      Implicit
       O3, O, O1D
       N, NO, NO2, OH, NO3, HNO3, HO2NO2, N2O5
       CH3O2, CH3OOH, CH2O, HO2, H2O2, H2O
       CH3CHO, C2O3, PAN, PAR, ROR
       OLE, C2H4, CH3COCHO, ISOP, ROOH
       ONIT, XO2, XO2N, RXPAR
       C10H16, TOLUENE, SOA
       SO2, SO4, DMS, NH3, NH4, NH4NO3
       CB1, CB2, OC1, OC2
       SSLT01, SSLT02, SSLT03, SSLT04
       DST01, DST02, DST03, DST04
      End Implicit
   End Solution Classes

 CHEMISTRY
      Photolysis
 [jo2_b=userdefined,]   O2 + hv -> 2*O
 [jo3_a]                O3 + hv -> O1D + O2
 [jo3_b]                O3 + hv -> O + O2
 [jno=userdefined,]     NO + hv -> N + O
 [jn2o]                 N2O + hv -> O1D + N2
 [jno2]                 NO2 + hv -> NO + O
 [jn2o5_a]              N2O5 + hv -> NO2 + NO3
 [jhno3]                HNO3 + hv -> NO2 + OH
 [jno3_a]               NO3 + hv -> NO2 + O
 [jno3_b]               NO3 + hv -> NO + O2
 [jho2no2_a]            HO2NO2 + hv -> OH + NO3
 [jho2no2_b]            HO2NO2 + hv -> NO2 + HO2
 [jch3ooh]              CH3OOH + hv -> CH2O + HO2 + OH
 [jch2o_a]              CH2O + hv -> CO + 2 * HO2
 [jch2o_b]              CH2O + hv -> CO + H2
 [jh2o2]                H2O2 + hv -> 2*OH
 [jch3cho]              CH3CHO + hv -> CH2O + XO2 + CO + 2*HO2
 [jpan]                 PAN + hv -> C2O3 + NO2
 [jmgly]                CH3COCHO + hv -> C2O3 + HO2 + CO
 [jrooh->,jch3ooh]      ROOH + hv -> OH
 [jonitr->,jch3cho]     ONIT + hv -> NO2 + HO2
 [jch4_a]               CH4 + hv -> HO2 + CH3O2
 [jch4_b]               CH4 + hv -> 1.44*H2 + .18*CH2O + .18*O + .66*OH + .44*CO2 + .38*CO + .05*H2O
      End Photolysis

      Reactions
*
* additional reaction for NOy loss
*
                                     N + NO -> N2 + O                                                        ; 2.10e-11,   100.
                                     N + O2 -> NO + O                                                        ; 1.50e-11, -3600.
*
 [usr_O_O2]                          O + O2 + M -> O3 + M
                                     O + O3 -> 2*O2                                                          ; 8e-12, -2060
 [o1d_n2]                            O1D + N2 -> O + N2                                                      ; 2.1e-11, 115
 [o1d_o2]                            O1D + O2 -> O + O2                                                      ; 3.2e-11, 70
 [ox_l1]                             O1D + H2O -> 2*OH                                                       ; 2.2e-10
                                     O1D + O3 -> O2 + O2                                                     ; 1.20e-10
                                     H2 + O1D -> HO2 + OH                                                    ; 1.1e-10
                                     H2 + OH -> H2O + HO2                                                    ; 5.5e-12, -2000
                                     O + OH -> HO2 + O2                                                      ; 2.2e-11, 120
                                     HO2 + O -> OH + O2                                                      ; 3e-11, 200
 [ox_l2]                             OH + O3 -> HO2 + O2                                                     ; 1.7e-12, -940
 [ox_l3]                             HO2 + O3 -> OH + 2*O2                                                   ; 1.e-14, -490
 [usr_HO2_HO2]                       HO2 + HO2 -> H2O2
                                     H2O2 + OH -> H2O + HO2                                                  ; 2.9e-12, -160
                                     OH + HO2 -> H2O + O2                                                    ; 4.8e-11, 250
                                     OH + OH -> H2O + O                                                      ; 4.2e-12, -240
                                     OH + OH + M -> H2O2 + M                                                 ; 6.9e-31,1., 2.6e-11,0., .6
                                     N2O + O1D -> 2*NO                                                       ; 6.7e-11
                                     N2O + O1D -> N2 + O2                                                    ; 4.9e-11
 [ox_p1]                             NO + HO2 -> NO2 + OH                                                    ; 3.5e-12, 250
                                     NO + O3 -> NO2 + O2                                                     ; 3e-12, -1500
                                     NO2 + O -> NO + O2                                                      ; 5.6e-12, 180
                                     NO2 + O3 -> NO3 + O2                                                    ; 1.2e-13, -2450
                                     NO3 + HO2 -> OH + NO2                                                   ; 2.3e-12, 170.
 [tag_NO2_NO3]                       NO2 + NO3 + M -> N2O5 + M                                               ; 2.e-30,4.4, 1.4e-12,.7, .6
 [usr_N2O5_M]                        N2O5 + M -> NO2 + NO3 + M
 [tag_NO2_OH]                        NO2 + OH + M -> HNO3 + M                                                ; 2.0e-30,3.0, 2.5e-11,0., .6
 [usr_HNO3_OH]                       HNO3 + OH -> NO3 + H2O
                                     NO3 + NO -> 2*NO2                                                       ; 1.5e-11, 170
 [tag_NO2_HO2]                       NO2 + HO2 + M -> HO2NO2 + M                                             ; 1.8e-31,3.2, 4.7e-12,1.4, .6
                                     HO2NO2 + OH -> H2O + NO2 + O2                                           ; 1.3e-12, 380
 [usr_HO2NO2_M]                      HO2NO2 + M -> HO2 + NO2 + M
 [usr_N2O5_aer]                      N2O5 -> 2 * HNO3
 [usr_NO3_aer]                       NO3  -> HNO3
 [usr_NO2_aer]                       NO2  -> 0.5*OH + 0.5*NO + 0.5*HNO3
                                     CH4 + OH -> CH3O2 + H2O                                                 ; 2.45e-12, -1775
                                     CH4 + O1D -> .75 * CH3O2 + .75 * OH + .25 * CH2O + .4 * HO2 + .05 * H2  ; 1.5e-10
 [ox_p2]                             CH3O2 + NO -> CH2O + NO2 + HO2                                          ; 2.8e-12, 300
                                     CH3O2 + CH3O2 -> 2 * CH2O + 2 * HO2                                     ; 5.e-13,-424
                                     CH3O2 + CH3O2 -> CH2O                                                   ; 1.9e-14,706
                                     CH3O2 + HO2 -> CH3OOH + O2                                              ; 4.1e-13, 750
                                     CH3OOH + OH -> .7 * CH3O2 + .3 * OH + .3 * CH2O + H2O                   ; 3.8e-12, 200
 [new3]                              CH2O + NO3 -> CO + HO2 + HNO3                                           ; 6.0e-13, -2058
                                     CH2O + OH -> CO + H2O +HO2                                              ; 9.e-12
 [usr_CO_OH_b]                       CO + OH -> CO2 + HO2    
 [CO_OH_M]                           CO + OH + M -> CO2 + HO2 + M                                            ; 5.90e-33, 1.4, 1.10e-12, -1.3, 0.6
*
* NMHC reactions
*
* changed reaction to increase PAN production
*                                    CH3CHO + OH -> HO2                                                      ; 7.0e-12, 250
                                     CH3CHO + OH -> 0.5 * HO2 + 0.5 * C2O3                                   ; 7.0e-12, 250
                                     CH3CHO + NO3 -> C2O3 + HNO3                                             ; 2.5e-15
 [ox_p3]                             C2O3 + NO -> CH2O + XO2 + HO2 + NO2                                     ; 3.5e-11, -180
 [usr_C2O3_NO2]                      C2O3 + NO2 -> PAN
                                     PAN -> C2O3 + NO2                                                       ; 2e16, -13500
                                     C2O3 + C2O3 -> 2*CH2O + 2*XO2 + 2*HO2                                   ; 2.e-12
                                     C2O3 + HO2 -> CH2O + XO2 + HO2 + 0.79*OH + 0.21*ROOH                    ; 6.5e-12
                                     PAR + OH -> 0.87*XO2 + 0.76*ROR + 0.13*XO2N + 0.11*HO2                  ; 8.1e-13
                                               + 0.11*CH3CHO + 0.11*RXPAR
                                     ROR -> 1.1*CH3CHO + 0.96 * XO2 + 0.94*HO2 + 2.1*RXPAR                   ; 1.1e15, -8000
                                     ROR -> HO2                                                              ; 1.6e3
                                     OLE + OH -> CH2O + CH3CHO + XO2 + HO2 + RXPAR                           ; 5.2e-12, 504
 [ox_l7]                             OLE + O3 -> 0.44*CH3CHO + 0.64*CH2O + 0.37*CO + 0.25*HO2 + 0.29*XO2     ; 4.33e-15, -1800
                                              + 0.4*OH + 0.9*RXPAR
                                     OLE + NO3 -> 0.91*XO2 + CH2O + CH3CHO + 0.09*XO2N + NO2 + RXPAR         ; 7.7e-15
 [usr_C2H4_OH]                            C2H4 + OH -> XO2 + HO2 + 1.56*CH2O + 0.22*CH3CHO
 [ox_l6]                             C2H4 + O3 -> CH2O + 0.43*CO + 0.26*HO2 + 0.12*OH                        ; 9.1e-15, -2580
                                     CH3COCHO + OH -> XO2 + C2O3                                             ; 1.7e-11
                                     ISOP + OH -> 0.85*XO2 + 0.61*CH2O + 0.85*HO2 + 0.03*CH3COCHO + 0.58*OLE ; 2.54e-11, 410
                                               + 0.15*XO2N + 0.63*PAR
 [ox_l5]                             ISOP + O3 -> 0.9*CH2O + 0.55*OLE + 0.18*XO2 + 0.36*CO + 0.15*C2O3       ; 12.3e-15, -2013
                                                + 0.03*CH3COCHO + 0.63*PAR + 0.3*HO2 + 0.28*OH
                                     ISOP + NO3 -> 0.9*HO2 + 0.9*ONIT + 0.03*CH2O + 0.45*OLE + 0.12*CH3CHO   ; 7.8e-13
                                                 + 0.1*NO2 + 0.08*CH3COCHO
                                     ROOH + OH -> 0.7*XO2 + 0.3*OH                                           ; 3.2e-12
                                     ONIT + OH -> NO2 + XO2                                                  ; 1.78e-12
 [tag_XO2_NO]                        XO2 + NO -> NO2                                                         ; 4.2e-12, 180
                                     XO2 + XO2 ->                                                            ; 1.7e-14, 1300
 [tag_XO2N_NO]                       XO2N + NO -> ONIT                                                       ; 6.8e-13
 [tag_XO2_HO2]                       XO2 + HO2 -> ROOH                                                       ; 3.5e-13, 1000
 [usr_XO2N_HO2]                      XO2N + HO2 -> ROOH
                                     RXPAR + PAR ->                                                          ; 8e-11
*
* aerosols
*
                                     CB1 -> CB2                                                              ; 7.1e-6
 [usr_SO2_OH]                        SO2 + OH -> SO4
                                     DMS + OH -> SO2                                                         ; 9.6e-12,-234.
 [usr_DMS_OH]                        DMS + OH -> .5 * SO2 + .5 * HO2
                                     DMS + NO3 -> SO2 + HNO3                                                 ; 1.9e-13, 520.
                                     NH3 + OH -> H2O                                                         ; 1.7e-12, -710.
                                     OC1 -> OC2                                                              ; 7.1e-6
 [usr_HO2_aer]                       HO2 -> 0.5*H2O2
*
* SOA formation (no equivalence to BIGALK because yield is too small)
*
 [soa1]                              C10H16 + O3 -> 6*PAR + 1.44*CH3CHO + 0.64*CH2O + 0.37*CO + 0.25*HO2     ; 1.e-16
                                                  + 0.29*XO2 + 0.4*OH + 0.9*RXPAR
 [soa2]                              C10H16 + OH -> 6*PAR + CH2O + CH3CHO + XO2 + HO2 + RXPAR + C2O3         ; 6.e-11
 [soa3]                              C10H16 + NO3 -> 6*PAR + C2O3 + HNO3 + 0.91*XO2 + CH2O + CH3CHO          ; 4.e-12
                                                   + 0.09*XO2N + NO2 + RXPAR
 [soa4]                              TOLUENE + OH -> 0.2*XO2N + 0.6*XO2 + 0.6*HO2 + 0.4*CO + 0.85*CH3COCHO       ; 5.5e-11
                                                  + 0.1*C2O3
* --------------------------------------------------------------
* Odd Chlorine Reactions
* --------------------------------------------------------------

* --------------------------------------------------------------
* Odd Bromine Reactions
* --------------------------------------------------------------

* --------------------------------------------------------------
* Halogens Reactions with Cl, OH
* --------------------------------------------------------------

* --------------------------------------------------------------
*   Sulfate aerosol reactions
* --------------------------------------------------------------
* --------------------------------------------------------------
*   Nitric acid Di-hydrate reactions
* --------------------------------------------------------------
* --------------------------------------------------------------
*   Ice aerosol reactions
* --------------------------------------------------------------
*
* additional tracers
*
*                                     CO50  ->                                                       ; 2.32e-7
*                                     CO25  ->                                                       ; 4.63e-7
*                                     SA25  ->                                                       ; 4.63e-7
*                                     CO3   ->                                                       ; 3.86e-6
*                                     CO1   ->                                                       ; 1.16e-5
*                                     CO50C ->                                                       ; 2.32e-7
*                                     CO25C ->                                                       ; 4.63e-7
*                                     SA25C ->                                                       ; 4.63e-7
*                                     CO3C  ->                                                       ; 3.86e-6
*                                     CO1C  ->                                                       ; 1.16e-5
*
   End Reactions

   Heterogeneous
      H2O2, HNO3, CH2O, CH3OOH, HO2NO2, ONIT
      ROOH, CH3COCHO, CH3CHO
      SO2, NH3
   End Heterogeneous

   Ext Forcing
      NO <- dataset, CO <- dataset, SO2 <- dataset, SO4 <- dataset, NO2 <- dataset, CB1 <- 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
