World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

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

By Parker, A. E.

Click here to view

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
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

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

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.

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

Atkinson, R., Baulch, D. L., Cox, R. A., Hampson, R. F., Kerr, J. A., Rossi, M. J., and Troe, J.: Evaluated kinetic and photochemical data for atmospheric chemistry, organic species: Supplement VII, J. Phys. Chem. Ref. Data, 28, 191–393, 1999.; Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., and Troe, J.: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume I – gas phase reactions of Ox, HOx, NOx and SOx species, Atmos. Chem. Phys., 4, 1461–1738, 2004.; Balzani Lööv, J. M., Legreid, G., Staehelin, J., Reimann, S., Prévôt, A. S. H., Henne, S., and Steinbacher, M.: Seasonal background concentration variations of selected trace gases at the Swiss high Alpine station Jungfraujoch during 2005, unpublished manuscript, 2007.; Bongartz, A., Kames, J., Welter, F., and Schurath, U.:, Near-UV absorption cross-sections and trans cis equilibrium of nitrous acid, J. Phys. Chem., 95, 1076–1082, 1991.; Cantrell, C. A. and Stedman, D. H.: A possible technique for the measurement of atmospheric peroxy-radicals, Geophys. Res. Lett., 9, 846–849, 1982.; Cantrell, C. A., Stedman, D. H., and Wendel, G. J.: Measurement of atmospheric peroxy-radicals by chemical amplification, Anal. Chem., 56, 1496–1502, 1984.; Cantrell, C. A., Shetter, R. E., Calvert, J. G., Parrish, D. D., Fehsenfeld, F. C., Goldan, P. D., Kuster, W., Williams, E. J., Westberg, H. H., Allwine, G., and Martin, R.: Peroxy-radicals as measured in rose and estimated from photostationary state deviations, J. Geophys. Res.-Atmos., 98, 18 355–18 366, 1993.; Cantrell, C. A., Edwards, G. D., Stephens, S., Mauldin, L., Kosciuch, E., Zondlo, M., and Eisele, F. Peroxy radical observations using chemical ionization mass spectrometry during TOPSE, J. Geophys. Res.-Atmos., 108, 8371, doi:10.1029/2002JD002715, 2003.; Carpenter, L. J., Green, T. J., Mills, G. P., Baugitte, S., Penkett, S. A., Zanis, P., Schuepbach, E., Schmidbauer, N., Monks, P. S., and Zellweger, C.: Oxidized nitrogen and ozone production effeciencies in the springtime free troposphere over the Alps, J. Geophys. Res., 105, 14 547–14 559, 2000.; Cooper, P. and Abbatt, J. P. D.: Heterogeneous Interactions of OH and HO2 Radicals with Surfaces Characteristic of Atmospheric Particulate Matter, J. Phys. Chem., 100, 2249–2254, 1996.; Coquart, B., Jenouvrier, A., and Merienne, M. F.: The NO2 absorption spectrum. II. Aborption cross-sections at low temperatures in the 400–500 nm region, J. Atmos. Chem., 21, 251–261, 1995.; Dommen, J., Prévôt, A. S. H., Neininger, B., and Bäumle, M.: Characterization of the photooxidant formation in the metropolitan area of Milan from aircraft measurements, J. Geophys. Res., 107, 8197, doi:10.1029/2000JD000283, 2002.; Edwards, G. D., Cantrell, C. A., Stephens, S., Hill, B., Goyea, O., Shetter, R. E., Mauldin III, R. L., Kosciuch, E., Tanner, D. J., and Eisele, F. L.: Chemical ionization mass spectrometer instrument for the measurement of tropospheric HO2 and RO2, Anal. Chem., 75, 5317–5327, 2003.; Edwards, G. D. and Monks, P. S.: Performance of a single-monochromator diode array spectroradiometer for the determination of actinic flux and atmospheric photolysis frequencies, J. Geophys. Res., 108, 8546, doi:10.1029/2002JD002844, 2003.; Europe, E. C.: Hemispheric transport of air pollution 2007, United Nations, Geneva, Switzerland, 2008.; Fleming, Z. L., Monks, P. S., Rickard, A. R., Bandy, B. J., Brough, N., Green, T. J., Reeves, C. E., and Penkett, S. A.: Seasonal dependence of peroxy radical concentrations at a Northern hemisphere marine boundary layer site during summer and winter: evidence for radical activity in winter, Atmos. Chem. Phys., 6, 5415–5433, 2006a.; Gierczak, T., Burkholder, J. B., Bauerle, S., and Ravishankara, A. R.: Phot


Click To View

Additional Books

  • Changes in the Production Rate of Second... (by )
  • Changes of Fatty Acid Aerosol Hygroscopi... (by )
  • Atmospheric Deposition of Mercury and Ma... (by )
  • A Revised Parameterization for Gaseous D... (by )
  • Long Term In-situ Observations of Biomas... (by )
  • Temporal Variability of Mineral Dust Con... (by )
  • Evaluation of Wrf Mesoscale Simulations ... (by )
  • Stratospheric Ozone Depletion from Futur... (by )
  • Ground Based Measurements of Immersion-f... (by )
  • Top-down Estimates of Biomass Burning Em... (by )
  • Evaluated Kinetic and Photochemical Data... (by )
  • A New Method for Measuring the Imaginary... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.