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Peroxy Radicals in the Summer Free Troposphere: Seasonality and Heterogeneous Loss : Volume 8, Issue 5 (30/09/2008)

By Parker, A. E.

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Book Id: WPLBN0003998321
Format Type: PDF Article :
File Size: Pages 49
Reproduction Date: 2015

Title: Peroxy Radicals in the Summer Free Troposphere: Seasonality and Heterogeneous Loss : Volume 8, Issue 5 (30/09/2008)  
Author: Parker, A. E.
Volume: Vol. 8, Issue 5
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2008
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Parker, A. E., Steinbacher, M., Monks, P. S., Balzani-Lööv, J. M., Staehelin, J., Wyche, K. P.,...Vollmer, M. K. (2008). Peroxy Radicals in the Summer Free Troposphere: Seasonality and Heterogeneous Loss : Volume 8, Issue 5 (30/09/2008). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Chemistry, University of Leicester, Leicester, UK. The sum of peroxy radicals (HO2iRiO2) and supporting trace gases were measured on the Jungfraujoch (3580 m a.s.l.) during the late summer of 2005. The period was marked by extended times of heavy snow which led to reduction in the observed peroxy radicals during the snowy periods that was greater than the concomitant reduction in j(O1D). In the limit a first order loss rate of 0.0063 s−1 can be derived for the peroxy radical loss in the snowy conditions that could be ascribed to a heterogenous loss process. On snow free days photolysis of HCHO is shown to be a significant peroxy radical source. The seasonal trends of the peroxy radical concentrations have been mapped from the winter to summer transition in line with previous experiments. Net ozone production in late summer at the Jungfraujoch was net neutral to marginally ozone destructive. A value of 28±4 pptv is calculated for the ozone compensation point for the snow free days.

Summary
Peroxy radicals in the summer free troposphere: seasonality and heterogeneous loss

Excerpt
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