1 #EQUATIONS {-------- background CH4-CO-NOx-HOx chemistry ------updated with nmhc6 July 18.2000---------------}
2 { NOTE that the numbers at the beginning of each line are used by the budget routines in MATCH,
3 so keep them updated!!! }
4 { based on Rolf von Kuhlmann, ...}
5 { last changed:; cms -added PAN based on RvK ...}
6 {1} O3 + hv = O1D : j(P_RJ_O1D);
7 {2} O1D + M = O3 : .78084D0*1.8D-11*exp(110.D0/TEMP)+.20946D0*3.2D-11*exp(70./TEMP); {JPL97}
8 {3} O1D + H2O = 2 OH : 2.2D-10; {JPL97}
9 {4} M + hv = 2 O3 : min(1.D-11,.20946D0*j(P_RJ_O2));
10 {5} O3 + OH = HO2 : 1.5D-12*exp(-880.D0/TEMP); {JPL2000}
11 {6} O3 + HO2 = OH : 2.D-14*exp(-680.D0/TEMP); {JPL2000}
12 {7} HO2 + OH = H2O : 4.8D-11*exp(250.D0/TEMP); {JPL97,JPL2000}
13 {8} 2 HO2 = H2O2 : RHO2HO2(F(2),F(1),TEMP); {JPL97}
14 {9} H2O2 + hv = 2 OH : j(P_RJ_H2O2);
15 {10} OH + H2O2 = HO2 : 2.9D-12*exp(-160.D0/TEMP); {JPL97}
16 {11} OH + CO = HO2 {+ CO2} : 1.5D-13*(1.D0+0.6D0*PRESS/101325.); {JPL97}
17 {12} CH4 + OH = MeO2 + H2O : 2.8D-14*exp(0.667D0*log(TEMP)-1575./TEMP); {JPL97}
18 {13} MeO2 + HO2 = MeOOH : 4.15D-13*exp(750.D0/TEMP);{Tyn00; note that a <10% HCHO-channel may exist}
19 {14} MeO2 + NO = HCHO + HO2 + NO2 : 2.8D-12*exp(300.D0/TEMP); {Tyn00, MCM-.1% MeONO2,J.Crowley<1D-5,+oth.path.}
20 {15} 2 MeO2 = 2 HCHO + 2 HO2 : 9.5D-14*exp(390.D0/TEMP)/(1.+1./26.2*EXP(1130./TEMP)); {Tyn00}
21 {16} 2 MeO2 = HCHO + MeOH : 9.5D-14*exp(390.D0/TEMP)/(1.+26.2*EXP(-1130./TEMP)); {Tyn00}
22 {17} MeO2 + NO3 = HCHO + HO2 + NO2 : 1.3D-12; {Atk. 99}
23 {18} MeOOH + hv = HCHO + HO2 + OH : j(P_RJ_CH3OOH);
24 {19} MeOOH + OH = .7 MeO2 + .3 HCHO + .3 OH : 3.8D-12*exp(200.D0/TEMP); {JPL97}
25 {20} HCHO + hv {+ 2 O2} = CO + 2 HO2 : j(P_RJ_CHOH);
26 {21} HCHO + hv = CO {+ H2} : j(P_RJ_COH2);
27 {22} HCHO + OH = CO + HO2 + H2O : 1.D-11; {JPL97}
28 {23} HCHO + NO3 = HNO3 + CO + HO2 : 3.4D-13*exp(-1900.D0/TEMP); {JPL97, E/R ass. same as ALD+NO3}
29 {24} NO + O3 = NO2 {+O2} : 3.D-12*exp(-1500.D0/TEMP); {JPL2000}
30 {25} NO + HO2 = NO2 + OH : 3.5D-12*exp(250.D0/TEMP); {JPL97}
31 {26} NO2 + hv = NO + O3 : j(P_RJ_NO2);
32 {27} NO2 + O3 = NO3 : 1.2D-13*exp(-2450.D0/TEMP); {JPL97}
33 {28} NO2 + OH {+M} = HNO3 : TROE(F(2),TEMP,.933D0,2.85D-30,-2.67D0,3.13D-11, 363.D0);{Dransfield '99}
34 {29} NO2 + HO2 {+M} = HNO4 : RJPL(1.8D-31, 3.2D0, 4.7D-12, 1.4D0,F(2),TEMP);{JPL97}
35 {30} HNO3 + hv = OH + NO2 : j(P_RJ_HNO3);
36 {31} OH + HNO3 {+M} = NO3 : RHNO3(F(2),TEMP); {Brown '99b, JPL2000}
37 {32} NO3 + hv {+O2} = NO2 + O3 : j(P_RJ_NO2O);
38 {33} NO3 + hv = NO : j(P_RJ_NOO2);
39 {34} NO3 + NO = 2 NO2 : 1.5D-11*exp(170.D0/TEMP); {JPL97}
40 {35} NO3 + NO2 {+M} = N2O5 : RJPL(2.D-30,4.4D0,1.4D-12,0.7D0,F(2),TEMP);{JPL2000}
41 {36} NO3 + HO2 = .8 NO2 + .8 OH + .2 HNO3 : 3.5D-12;{JPL97, branching: see comment C14}
42 {37} N2O5 + hv = NO3 + NO2 : j(P_RJ_N2O5);
43 {38} N2O5 {+M} = NO3 + NO2 : RCONST(35)/(3.D-27*exp(10991.D0/TEMP));{JPL2000}
44 {39} N2O5 = 2 HNO3 : hetn2o5; {~10D-5,Dentener&Crutzen93}
45 {40} N2O5 + H2O = 2 HNO3 : 4.D-22; {JPL97;<2.D-21,from 3 studies, a 4th study gets <5.D-22}
46 {41} HNO4 + hv = .39 NO3 + .39 OH + .61 NO2 + .61 HO2 : j(P_RJ_HNO4);{Atk.97,S.Sander:.56 +-.17 NO2 yield}
47 {42} HNO4 {+M} = HO2 + NO2 : RCONST(29)/(2.1D-27*exp(10900.D0/TEMP)); {JPL97}
48 {43} HNO4 + OH = NO2 {+H2O +O2} : 1.3D-12*exp(380./TEMP); {JPL97}
49 {44} M{=H2} + OH {+O2} = HO2 + H2O : 5.31D-7*5.5D-12*exp(-2000.D0/TEMP);{JPL97, fixed H2 (531ppb) Novelli '99}
50 {45} MeOH + OH = HCHO + HO2 : 6.7D-12*exp(-600.D0/TEMP); {JPL97, possibly different products}
51 {PAN ------------------------------------------------------------------------------------------------------ }
52 {46} PA + HO2 = PAA : 4.3D-13*exp(1040.D0/TEMP)/(1.D0+1.D0/37.D0*exp(660.D0/TEMP)); {Tyn01}
53 {47} PA + HO2 = CH3COOH + O3 : 4.3D-13*exp(1040.D0/TEMP)/(1.D0+37.D0*exp(-660.D0/TEMP)); {Tyn01}
54 {48} PA + NO = MeO2 + NO2 {+CO2} : 8.1D-12*exp(270.D0/TEMP); {Tyn01}
55 {49} PA + NO2 = PAN : RJPL(8.5D-29,6.5D0,1.1D-11,1.0D0,F(2),TEMP); {Tyn01}
56 {50} PA + MeO2 = HCHO + HO2 + MeO2 {+CO2} : 2.0D-12*exp(500.D0/TEMP)/(1.D0+1.D0/2.2D6*exp(3820.D0/TEMP));{Tyn01,br.JPL97}
57 {51} PA + MeO2 = CH3COOH + HCHO : 2.0D-12*exp(500.D0/TEMP)/(1.D0+2.2D6* exp(-3820.D0/TEMP));{Tyn01,br.:JPL97}
58 {52} 2 PA = 2 MeO2 { + 2 CO2 +O2} : 2.5D-12*exp(500.D0/TEMP); {Tyn01}
59 {53} PA + NO3 = MeO2 + NO2 {+CO2} : 4.D-12; {K&S 96,MCM}
60 {54} PAA + hv = MeO2 + OH : j(P_RJ_CHOH);{rvk99,Giguerre&Olmos56 extrapol. 300-340nm}
61 {55} PAA + OH = PA : RCONST(19);{as MeOOH+OH, different products used in RACM}
62 {56} PAN + OH = HCHO + NO2 {+CO2} : 2.D-14; {JPL97:<4.D-14(products unknown), could probably skip this}
63 {57} PAN + hv = PA + NO2 : j(P_RJ_PAN);
64 {58} PAN {+M} = PA + NO2 : RCONST(49)/9.D-29*exp(-14000./TEMP); {JPL97}
65 {59} CH3COOH + OH = MeO2 {+CO2} : 4.D-13*exp(200.D0/TEMP); {JPL97}