THE NITRATE RADICAL NO-3 - A NIGHT TIME ATMOSPHERIC SPECIES
The nitrate radical is an intermediate in the reaction of NO-2 with ozone which leads to the formation of nitrogen pentoxide N-2O-5. NO-3 is rapidly photolyzed in daylight but at nighttime it may be a common constituent of the troposphere. Its role as initiator of radical reactions when photochemical radical sources are absent is of importance in atmospheric chemistry. Recent studies assign to NO-3 a role comparable to that of the OH radical at daytime in the transformation of NO-x to HNO-3 in the lower troposphere. The report presents an updated summary of the knowledge of this atmospheric species. The matter is divided in the following sections : - "Photochemistry" which deals with the absorption spectrum, fluorescence and photodissociation; - "Atmospheric reactions" - "NO-3 in Tropospheric Air" which concerns detection techniques and field measurements. Speculations by different authors on the role played by the nitrate radical in tropospheric air chemistry are presented in the last section.
Bibliographic Reference: EUR 10212 EN (1985) MF, 33 P., BFR 150, BLOW-UP COPY BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989124062900 / Last updated on: 1987-01-01
Available languages: en