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Other Names

OH, Hydroxyl Radical


The hydroxyl radical, OH, is responsible for the oxidation of most of the compounds that are released into, or formed in, the atmosphere.
In the the presence of organic matter (VOC), the hydroxyl radical is an intermediate in the formation of photochemical smog) In relatively unpolluted air, the photolysis of ozone or water (H2O) leads to hydroxyl radical formation. In the lower atmosphere it is formed by the reaction of excited oxygen atoms O(1D) with water or by the reaction of hydroperoxyl radicals with nitric oxide. In the stratosphere it is involved in ozone-destroying catalytic cycles.


(1) Atmospheric Chemistry Models (5) Tracer of Air Motions
(2) Air Quality (6) stratosphere-troposphere exchange
(3) Monitoring of Biomass Burning (7) Climate Change
(4) Health and Environment  

GES DISC Datasets

Quick Search for 'Hydroxyl' with Mirador
Click on the corresponding 'Data access' links in the table below to access products containing specific parameter.

Parameter Units Platform /Instrument Data Products
Begin Date End Date Data Access Doc
Profiles of Hydroxyl Radical (OH) (mixing ratios at different pressure levels); pixel resolution vmr Aura/MLS 2004-08-08 Current ML2OH Y
Profiles of Hydroxyl Radical (OH) (mixing ratios at different pressure levels); global gridded vmr Aura/MLS 2004-08-08 Current   Y

Other sources for data

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Last updated: Dec 02, 2011 02:21 PM ET