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Global Ozone and Reactive Nitrogen : Composition, Chemistry and SourcesOzone plays a central role in the chemistry of the atmosphere both as an ultraviolet shield and as a source of hydroxyl radicals (OH), a potent initiator of atmospheric chemistry. There is evidence to suggest that the ozone abundance in the troposphere (0-10 km) has doubled since the industrial revolution and continues to increase to date. The principle reason for this increase is thought to be the increasing emissions of nitrogen oxides (NO(x)) from anthropogenic activities. Although NO(x) is highly reactive and its products such as HN03 are easily removed by deposition, it now appears that its chemistry is quite complex and it can be transported over long distances via its conversion to a variety of nitrates and penetrates. The sources of atmospheric NO(x) include free tropospheric sources such as lightning and subsonic aircraft, as well as surface emissions which are transported to the free troposphere via convective processes. Recent experimental and theoretical studies have tried to unravel the chemistry of reactive nitrogen species, its sources, and their role in ozone formation. In this presentation we shall describe the results from these studies.
Document ID
20010116383
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Sing, Hanwant B.
(NASA Ames Research Center Moffett Field, CA United States)
Bradshaw, J.
(NASA Ames Research Center Moffett Field, CA United States)
Davis, D.
(NASA Ames Research Center Moffett Field, CA United States)
Gregory, G.
(NASA Ames Research Center Moffett Field, CA United States)
Talbot, R.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 20, 2013
Publication Date
July 27, 1994
Subject Category
Environment Pollution
Meeting Information
Meeting: Second International Conference on Air Pollution
Location: Barcelona
Country: Spain
Start Date: September 27, 1994
End Date: September 29, 1994
Funding Number(s)
PROJECT: RTOP 464-54-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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