The chemistry of the hydroxyl radical in the troposphere

摘要: Like oxidation in a flame, the atmosphere is mediated by free radicals. By far most important radical troposphere hydroxyl radical, OH. It generated photochemically, and reacts with atmospheric trace gases, many instances as first, rate-determining, step reaction chains leading to their oxidation. Usually these regenerate OH thus maintaining at relatively large day-time concentrations of order 106 cm−3.The reactions controlling local form framework photochemical model, results which are compared measured field locations different pollutant attributable activities man. The model-predicted based on simultaneously photolysis rates those gases that dominate chemistry level.Predicted correlate reasonably well where pollutants small but not they large. Explanations being sought.