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Study of the Unknown Hono Daytime Source at a European Suburban Site During the Megapoli Summer and Winter Field Campaigns : Volume 14, Issue 6 (19/03/2014)

By Michoud, V.

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Book Id: WPLBN0003993717
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: Study of the Unknown Hono Daytime Source at a European Suburban Site During the Megapoli Summer and Winter Field Campaigns : Volume 14, Issue 6 (19/03/2014)  
Author: Michoud, V.
Volume: Vol. 14, Issue 6
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Miet, K., Furger, M., Camredon, M., Colomb, A., Borbon, A., Kukui, A.,...Dupont, J. C. (2014). Study of the Unknown Hono Daytime Source at a European Suburban Site During the Megapoli Summer and Winter Field Campaigns : Volume 14, Issue 6 (19/03/2014). Retrieved from http://community.ebooklibrary.org/


Description
Description: LISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, France. Nitrous acid measurements were carried out during the MEGAPOLI summer and winter field campaigns at SIRTA observatory in Paris surroundings. Highly variable HONO levels were observed during the campaigns, ranging from 10 ppt to 500 ppt in summer and from 10 ppt to 1.7 ppb in winter. Significant HONO mixing ratios have also been measured during daytime hours, comprised between some tenth of ppt and 200 ppt for the summer campaign and between few ppt and 1 ppb for the winter campaign. Ancillary measurements, such as NOx, O3, photolysis frequencies, meteorological parameters (pressure, temperature, relative humidity, wind speed and wind direction), black carbon concentration, total aerosol surface area, boundary layer height and soil moisture, were conducted during both campaigns. In addition, for the summer period, OH radical measurements were made with a CIMS (Chemical Ionisation Mass Spectrometer). This large dataset has been used to investigate the HONO budget in a suburban environment. To do so, calculations of HONO concentrations using PhotoStationary State (PSS) approach have been performed, for daytime hours. The comparison of these calculations with measured HONO concentrations revealed an underestimation of the calculations making evident a missing source term for both campaigns. This unknown HONO source exhibits a bell-shaped like average diurnal profile with a maximum around noon of approximately 0.7 ppb h−1 and 0.25 ppb h−1, during summer and winter respectively. This source is the main HONO source during daytime hours for both campaigns. In both cases, this source shows a slight positive correlation with J(NO2) and the product between J(NO2) and soil moisture. This original approach had, thus, indicated that this missing source is photolytic and might be heterogeneous occurring at ground surface and involving water content available on the ground.

Summary
Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns

Excerpt
Acker, K., Febo, A., Trick, S., Perrino, C., Bruno, P., Wiesen, P., Möller, D., Wieprecht, W., Auel, R., Giusto, M., Geyer, A., Platt, U., and Allegrini, I.: Nitrous acid in the urban area of rome, Atmos. Environ., 40, 3123–3133, doi:10.1016/j.atmosenv.2006.01.028, 2006a.; Acker, K., Möller, D., Wieprecht, W., Meixner, F. X., Bohn, B., Gilge, S., Plass-Dülmer, C., and Berresheim, H.: Strong daytime production of OH from HNO2 at a rural mountain site, Geophys. Res. Lett., 33, L02809, doi:10.1029/2005GL024643, 2006b.; Afif, C.: L'acide nitreux atmosphérique: Implications dans la chimie en milieu urbain, Université Paris XII- Val de Marne, Université Saint-Joseph de Beyrouth, Créteil, Beyrouth, 2008.; Afif, C., Jambert, C., Colomb, A., Eyglunent, G., Borbon, A., Daële, V., Doussin, J. F., and Perros, P. E.: NitroMAC: an instrument for the measurement of HONO. Intercomparison with LOPAP, Water Air Soil Poll., in preparation, 2014.; Ait-Helal, W., Borbon, A., Sauvage, S., de Gouw, J. A., Colomb, A., Gros, V., Freutel, F., Crippa, M., Afif, C., Baltensperger, U., Beekmann, M., Doussin, J.-F., Durand-Jolibois, R., Fronval, I., Grand, N., Leonardis, T., Lopez, M., Michoud, V., Miet, K., Perrier, S., Prévôt, A. S. H., Schneider, J., Siour, G., Zapf, P., and Locoge, N.: Volatile and intermediate-volatility organic compounds in sub-urban Paris: variability, origin and importance for SOA formation, Atmos. Chem. Phys. Discuss., 14, 4841–4904, doi:10.5194/acpd-14-4841-2014, 2014.; Alicke, B., Geyer, A., Hofzumahaus, A., Holland, F., Konrad, S., Pätz, H. W., Schäfer, J., Stutz, J., Volz-Thomas, A., and Platt, U.: OH formation by HONO photolysis during the BERLIOZ experiment, J. Geophys. Res., 108, 8247, doi:10.1029/2001jd000579, 2003.; Amedro, D., Parker, A. E., Schoemaecker, C., and Fittschen, C.: Direct observation of OH radicals after 565 nm multi-photon excitation of NO2 in the presence of H2O, Chem. Phys. Lett., 513, 12–16, doi:10.1016/j.cplett.2011.07.062, 2011.; Ammann, M., Kalberer, M., Jost, D. T., Tobler, L., Rössler, E., Piguet, D., Gäggeler, H. W., and Baltensperger, U.: Heterogeneous production of nitrous acid on soot in polluted air masses, Nature, 395, 157–160, doi:10.1038/25965, 1998.; 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, doi:10.5194/acp-4-1461-2004, 2004.; Aumont, B., Madronich, S., Ammann, M., Kalberer, M., Baltensperger, U., Hauglustaine, D., and Brocheton, F.: On the NO2 + soot reaction in the atmosphere, J. Geophys. Res., 104, 1729–1736, doi:10.1029/1998jd100023, 1999.; Bejan, I., Abd El Aal, Y., Barnes, I., Benter, T., Bohn, B., Wiesen, P., and Kleffmann, J.: The photolysis of ortho-nitrophenols: a new gas phase source of HONO, Phys. Chem. Chem. Phys., 8, 2028–2035, doi:10.1039/b516590c, 2006.; Berresheim, H., Elste, T., Plass-Dülmer, C., Eisele, F. L., and Tanner, D. J.: Chemical ionization mass spectrometer for long-term measurements of atmospheric OH and H2SO4

 

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