GSFC Code 916: Atmospheric Chemistry and Dynamics Branch [menu bar image map]

Goddard 3D Chemical Transport Model (CTM) Chemical Reaction Rate Table when using "rate_lookup.tables_98":
 
  Temperature Independent Bimolecular Reactions available to the CTM: [ k = A ]
 
Chemical Reaction A
O(1D)+H2 -> OH+H 1.0E-10
O(1D)+H20 -> OH+OH 2.2E-10
O(1D)+N2O -> N2+O2 4.9E-11
O(1D)+N2O -> NO+NO 6.7E-11
O(1D)+CH4 -> CH3+OH 1.12E-10
O(1D)+CH4 -> H2+H2CO 3.8E-11
O(1D)+CClFO -> Products 1.9E-10
O(1D)+CF2O -> Products 7.4E-11
O(1D)+CCl3F -> ClO+2Cl+FRAG2.3E-10
O(1D)+CCl2F2 -> ClO+Cl+FRAG1.4E-10
O(1D)+CCl3CF3 -> 3Cl+Products2.0E-10
O(1D)+CClF2CClF2 -> 2Cl+Products1.3E-10
O(1D)+CClF2CF3 -> Cl+Products 5.0E-11
H+HO2 -> H2+O2 6.5E-12
H+HO2 -> H20+O 1.6E-12
H+HO2 -> OH+OH 7.3E-11
N2O5+H2O -> HNO3+HNO3 2.0E-21
OH+CO -> CO2+H 1.5E-13
OH+H2CO -> H2O+HCO 1.0E-11
OH+HBr -> H2O+Br 1.1E-11

  Temperature Dependent Bimolecular Reactions available to the CTM: [ k = A exp(E/RT) ]
 
Chemical Reaction A E/R
O+O3 -> O2+O2 8.0E-12 2060.
O2(1D)+O2 -> O2+O2 3.6E-18 220.
O2(1D)+O3 -> O2+O2+O 5.2E-11 2840.
O+OH -> O2+H 2.2E-11 -120.
O+HO2 -> OH+O2 3.0E-11 -200.
O+H2O2 -> OH+HO2 1.4E-12 2000.
H+O3 -> OH+O2 1.4E-10 470.
OH+O3 -> HO2+O2 1.6E-12940
OH+H2 -> H2O+H 5.5E-12 2000.
OH+OH -> H20+O 4.2E-12 240.
OH+HO2 -> H2O+O2 4.8E-11 -250.
OH+H2O2 -> H2O+HO2 2.9E-12 160.
HO2+O3 -> OH+2O2 1.1e-14500
HO2+HO2 -> H2O2+O2 2.3E-13 -600.
O+NO2 -> NO+O2 5.26e-12-210
OH+HO2NO2 -> H2O+O2+NO2 1.3E-12 -380.
HO2+NO -> NO2+OH 3.7E-12-250.
N+O2 -> NO+O 1.5E-11 3600.
N+NO -> N2+O 2.1e-11 -100.
N+NO2 -> N2O+O 5.8e-12 -220.
NO+O3 -> NO2+O2 2.0e-121400
NO+NO3 -> NO2+NO2 1.5E-11 -170.
NO2+O3 -> NO3+02 1.2E-13 2450.
O+H2CO -> HCO+OH 3.4E-11 1600.
OH+CH4 -> CH3+H2O 2.65e-121800
OH+CH3OOH -> H20+CH3O2 3.8E-12 -200.
HO2+CH3O2 -> CH3OOH+O2 3.8E-13 -800.
HCO+O2 -> CO+HO2 3.5E-12 -140.
CH30+O2 -> CH2O+HO2 3.9E-14 900.
CH3O2+NO -> CH3O+NO2 4.2E-12-180
O+ClO -> Cl+O2 3.0E-11 -70.
O+ClONO2 -> ClO+NO3 2.9E-12 800.
OH+ClO -> Cl+HO2 95% of 5.5e-1295% of -292
OH+ClO -> HCl+O2 5% of 5.5e-12 5% of -292
OH+HCl -> H2O+Cl 2.6E-12 350.
OH+HOCl -> H20+ClO 3.0E-12 500.
OH+ClONO2 -> HOCl+NO3 1.2E-12 330.
OH+CH3Cl -> CH2Cl+H2O 4.0e-12 1400.
CHF2Cl+OH -> CF2Cl+H2O 1.0E-12 1600.
OH+CH3CCl3 -> 3(Cl) 1.8E-12 1550.
HO2+Cl -> HCl+O2 1.8E-11 -170.
HO2+Cl -> OH+ClO 4.1E-11 450.
HO2+ClO -> HOCl+O2 4.8E-13 -700.
Cl+O3 -> ClO+O2 2.9e-11260
Cl+H2 -> HCl+H 3.7E-11 2300.
Cl+H2O2 -> HCl+HO2 1.1E-11 980.
Cl+CH4 -> HCl+CH3 1.1e-111400
Cl+H2CO -> HCl+HCO 8.1E-11 30.
ClO+NO -> NO2+Cl 6.4E-12 -290.
OH+CH3Br -> Br+Products 4.0e-12 1470.
HO2+Br -> HBr+O2 1.5E-11 600.
HO2+BrO -> HOBr+O2 6.2e-12-500
Br+O3 -> BrO+O2 1.7E-11 800.
Br+H2CO -> HBr+HCO 1.7E-11 800.
BrO+NO -> Br+NO2 8.8E-12 -260.
BrO+ClO -> Br+OClO 1.6E-12-430
BrO+ClO -> Br+ClOO 2.9E-12-220
BrO+ClO -> BrCl+O2 5.8E-13-170
BrO+BrO -> 2Br+O2 4.0e-12190

  Equilibrium Reactions used in the CTM: [ K(T) = A exp(B/T) ]
 
Chemical Reaction A B
NO2+NO3+M -> N2O5+M 2.7E-27 11000.
HO2+NO2+M -> HO2NO2+M 2.1E-27 10900.
ClO+ClO+M -> Cl2O2+M 1.3E-27 8744.

 
  Termolecular Reactions available to the Chemical Transport Model:
k(M,T) = ( (k0(T)[M])/(1+(k0(T)[M]/kinf(T)) 0.6^{1+[log10(k0(T)[M]/kinf(T)) ]2 }-1
 
Chemical Reaction Low Pressure Limit High Pressure Limit
k0300 n kinf300 m
HO2+HO2+M -> H2O2+O2+M 1.7E-33 -1000. 0.0E+000.0
O+O2+M -> O3+M 6.0E-342.30.0E+000.0
O(1D)+N2+M -> N2O+M 3.5E-370.6 0.0E+000.0
H+O2+M -> HO2+M 5.7E-321.6 7.5E-110.0
OH+OH+M -> H2O2+M 6.9E-310.81.5E-110.0
O+NO+M -> NO2+M 9.0E-321.5 3.0E-110.0
O+NO2+M -> NO3+M 9.0E-322.0 2.2E-110.0
OH+NO2+M -> HONO2+M 2.46e-30
98.2: 2.47e-30*		2.971.45e-112.77
HO2+NO2+M -> HO2NO2+M 1.8E-313.2 4.7E-121.4
NO2+NO3+M -> N2O5+M 2.2e-303.9 1.5E-120.7
CH3+O2+M -> CH3O2+M 4.5E-313. 1.8E-121.7
ClO+NO2+M -> ClONO2+M 1.8E-313.4 1.5E-111.9
BrO+NO2+M -> BrONO2+M 5.2E-313.2 6.9E-122.9
ClO+ClO+M -> Cl2O2+M 2.2E-323.1 3.5e-121.0
Non JPL 1997 Reactions:
O(1D)+M -> O(3P)+M
M= N2, O2		1.8E-11-110. 3.2E-11-70.
O+O+M -> O2+M (Hampson'80) 1.4E-33-408. 0.0E+000.0

98.2*: This reaction only 94% efficient with respect to [M] in 98.2 tables
 
  Heterogeneous Chemical Reactions used in the Chemical Transport Model:
 
ClONO2+H2O -> HOCl+HNO3
N2O5+HCl -> HNO3+ClONO
HOCl+HCl -> Cl2+H2O
BrONO2+H2O -> HOBr+HNO3
N2O5+H2O -> 2HNO3
HCl+ClONO2 -> 2HNO3
 
 
  Special Case Reactions used in the Chemical Transport Model:
k(M,T) = k0 *exp(E0/T) + (k1 *exp(E1/T) )/{1. + ( (k1 *exp(E1/T))/ (k2 *exp(E2/T))*[M] ) }
 
Chemical Reaction k0 E0 k1 E1 k2 E2
OH+HNO3->H20+NO3 1.358e-14
98.2: 2.41E-14		578
98.2: 460 		5.046E-17
98.2: 2.69E-17		2067
98.2: 2199 		4.83E-33
98.2: 6.51E-34 		906
98.2: 1335

98.2: 98.2: refers to the values used in the 98.2 version of the rate tables


 

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Last Updated: Jan 2002
Page Author: Stephen D. Steenrod (SSAI) steenrod@code916.gsfc.nasa.gov)
Responsible NASA organization/official: Dr. A. R. Douglass, Atmospheric Chemistry and Dynamics Branch