and all have small negative temperature dependence. Recommended temperature dependence of rate constants are based on O(3P) + OH: Lewis and Watson (1980), Howard and Smith (1981),O(3P) + HO2: Keyser (1982), Nicovich and Wine (1987),O(3P) + NO2: Ongstad and Birks (1986), Geer-Müller and Stuhl (1987), Gierczak et al. (1999),O(3P) + ClO: Ongstad and Birks (1986), Nicovich et al. (1988), Goldfarb et al. (2001), and previous experiments.