World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Nighttime Measurements of HoX During the Ronoco Project and Analysis of the Sources of Ho2 : Volume 15, Issue 2 (30/01/2015)

By Walker, H. M.

Click here to view

Book Id: WPLBN0003997089
Format Type: PDF Article :
File Size: Pages 65
Reproduction Date: 2015

Title: Nighttime Measurements of HoX During the Ronoco Project and Analysis of the Sources of Ho2 : Volume 15, Issue 2 (30/01/2015)  
Author: Walker, H. M.
Volume: Vol. 15, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Evans, M. J., Cain, M., Hopkins, J. R., Lidster, R. T., Ingham, T., Bauguitte, S.,...Heard, D. E. (2015). Nighttime Measurements of HoX During the Ronoco Project and Analysis of the Sources of Ho2 : Volume 15, Issue 2 (30/01/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: School of Chemistry, University of Leeds, Leeds, UK. Measurements of the radical species OH and HO2 were made using the Fluorescence Assay by Gas Expansion (FAGE) technique during a series of nighttime and daytime flights over the UK in summer 2010 and winter 2011. OH was not detected above the instrument's 1Σ limit of detection during any of the nighttime flights or during the winter daytime flights, placing upper limits on [OH] of 1.8 × 106 molecule cm−3 and 6.4 × 105 molecule cm−3 for the summer and winter flights, respectively. HO2 reached a maximum concentration of 3.2 × 108 molecule cm−3 (13.6 pptv) during a nighttime flight on 20 July 2010, when the highest concentrations of NO3 and O3 were also recorded. Analysis of the rates of reaction of OH, O3, and the NO3 radical with measured alkenes indicates that the summer nighttime troposphere can be as important for the processing of VOCs as the winter daytime troposphere. Analysis of the instantaneous rate of production of HO2 from the reactions of O3 and NO3 with alkenes has shown that, on average, reactions of NO3 dominated nighttime production of HO2 during summer, and reactions of O3 dominated nighttime HO2 production during winter.

Summary
Nighttime measurements of HOx during the RONOCO project and analysis of the sources of HO2

Excerpt
Andrés-Hernández, M. D., Kartal, D., Crowley, J. N., Sinha, V., Regelin, E., Martínez-Harder, M., Nenakhov, V., Williams, J., Harder, H., Bozem, H., Song, W., Thieser, J., Tang, M. J., Hosaynali Beigi, Z., and Burrows, J. P.: Diel peroxy radicals in a semi-industrial coastal area: nighttime formation of free radicals, Atmos. Chem. Phys., 13, 5731–5749, doi:<a href=http://dx.doi.org/10.5194/acp-13-5731-2013>10.5194/acp-13-5731-2013, 2013.; Atkinson, R. and Arey, J.: Gas-phase tropospheric chemistry of biogenic volatile organic compounds: a review, Atmos. Environ., 37, 197–219, 2003.; Beames, J. M., Liu, F., Lu, L., and Lester, M. I.: Ultraviolet spectrum and photochemistry of the simplest Criegee intermediate CH2OO, J. Am. Chem. Soc., 134, 20045–20048, 2012.; Beames, J. M., Liu, F., Lu, L., and Lester, M. I.: UV spectroscopic characterization of an alkyl substituted Criegee intermediate CH3CHOO, J. Chem. Phys., 138, 244307 <a href=http://dx.doi.org/10.1063/1.4810865>doi:10.1063/1.4810865, 2013.; Berndt, T. and Böge, O.: Kinetics of oxirane formation in the reaction of nitrate radicals with tetramethylethylene, Ber. Bunsen Phys. Chem., 98, 869–871, 1994.; Bey, I., Aumont, B., and Toupance, G.: A modeling study of the nighttime radical chemistry in the lower continental troposphere, J. Geophys. Res.-Atmos., 106, 9991–10001, 2001.; Bloss, C., Wagner, V., Bonzanini, A., Jenkin, M. E., Wirtz, K., Martin-Reviejo, M., and Pilling, M. J.: Evaluation of detailed aromatic mechanisms (MCMv3 and MCMv3.1) against environmental chamber data, Atmos. Chem. Phys., 5, 623–639, doi:<a href=http://dx.doi.org/10.5194/acp-5-623-2005>10.5194/acp-5-623-2005, 2005.; Brown, S. S. and Stutz, J.: Nighttime radical observations and chemistry, Chem. Soc. Rev., 41, 6405–6447, 2012.; Brown, S. S., Dibb, J. E., Stark, H., Aldener, M., Vozella, M., Whitlow, S., Williams, E. J., Lerner, B. M., Jakoubek, R., Middlebrook, A. M., DeGouw, J. A., Warneke, C., Goldan, P. D., Kuster, W. C., Angevine, W. M., Sueper, D. T., Quinn, P. K., Bates, T. S., Meagher, J. F., Fehsenfeld, F. C., and Ravishankara, A. R.: Nighttime removal of NOx in the summer marine boundary layer, Geophys. Res. Lett., 31, L07108–L07113, 2004.; Brown, S. S., Osthoff, H. D., Stark, H., Dubé, W. P., Ryerson, T. B., Warneke, C., de Gouw, J. A., Wollny, A. G., Parrish, D. D., Fehsenfeld, F. C., Ravishankara, A. R.: Aircraft observations of daytime NO3 and N2O5 and their implications for tropospheric chemistry, J. Photoch. Photobio. A, 176, 270–278, 2005.; Drozd, G. T. and Donahue, N. M.: Pressure dependence of stabilized Criegee intermediate formation from a sequence of alkenes, J. Phys. Chem. A, 115, 4381–4387, 2011.; Brown, S. S., Ryerson, T. B., Wollny, A. G., Brock, C. A., Peltier, R., Sullivan, A. P., Weber, R. J., Dubé, W. P., Trainer, M., Meagher, J. F., Fehsenfeld, F. C., and Ravishankara, A. R.: Variability in nocturnal nitrogen oxide processing and its role in regional air quality, Science, 311, 67–70, 2006.; Brown, S. S., Dubé, W. P., Peischl, J., Ryerson, T., Atlas, E., Warneke, C., de Gouw, J. A., te Lintel Hekkert, S., Brock, C. A., Flocke, F., Trainer, M., Parrish, D. D., Feshenfeld, F. C., and Ravishankara, A.: Budgets for nocturnal VOC oxidation by nitrate radicals aloft during the 2006 Texas Air Quality Study, J. Geophys. Res.-Atmos., 116, D24305–D24320, 2011.; Cantrell, C. A., Zimmer, A., and Tyndall, G. S.: Absorption cross sections for water vapor from 183 to 193 nm, Geophys. Res. Lett., 24, 2195–2198, 1997.; Carter, W. P. L. and Atkinson, R.: Alkyl nitrate formation from the atmospheric photooxidation of alkanes; a revised estimation method, J. Atmos. Chem., 8, 165–173, 1989.; Commane, R.: Understanding Radical Chemistry Throughout the Troposphere using Laser-Induced Fluor


 

Click To View

Additional Books


  • Extension of an Assessment Model of Ship... (by )
  • Present and Future Nitrogen Deposition t... (by )
  • Max-doas Measurements of Atmospheric Tra... (by )
  • Spatial Distribution of Mercury Depositi... (by )
  • The Effect of Systematic Measurement Err... (by )
  • Nogaps-alpha Model Simulations of Strato... (by )
  • A Large and Ubiquitous Source of Atmosph... (by )
  • Atmospheric Waves as Scaling, Turbulent ... (by )
  • Wet and Dry Deposition of Mineral Dust P... (by )
  • Biomass Burning Aerosol Emissions from V... (by )
  • On the Importance of Cumulus Penetration... (by )
  • Gas Phase Precursors to Anthropogenic Se... (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.