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AMBIENT AIR HYDROXYL RADICAL CONCENTRATIONS: MEASUREMENTS AND MODEL PREDICTIONS
Citation:
Altshuller, A. AMBIENT AIR HYDROXYL RADICAL CONCENTRATIONS: MEASUREMENTS AND MODEL PREDICTIONS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/098 (NTIS PB90117086).
Description:
This review critically examines the limited number of recent near surface measurements of hydroxyl radicals in urban and rural areas. redictions of average tropospheric, hemispheric and/or zonal concentrations of hydroxyl radicals derived from methyl chloroform and carbon monoxi de con cent rati ons and models are discussed. he limitations of one and two dimensional model predictions of zonal and seasonal hydroxyl concentrations received detailed consideration. Of especial concern on a regional scale are cloud cover effects on the penetration of ultraviolet radiation below 320 um which is critical to the subsequent reactions forming hydroxyl radicals.