Atmospheric variation of nitrous acid at different sites in Europe

Karin Acker; Detlev Möller

doi:10.1071/EN07023

RESEARCH FRONT

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Atmospheric variation of nitrous acid at different sites in Europe

Karin Acker ^A ^B and Detlev Möller ^A

+ Author Affiliations

- Author Affiliations

^A Brandenburgische Technische Universität Cottbus, Lehrstuhl Luftchemie und Luftreinhaltung, D-03013 Cottbus, Germany.

^B Corresponding author. Email: ack@btu-lc.fta-berlin.de

Environmental Chemistry 4(4) 242-255 https://doi.org/10.1071/EN07023
Submitted: 26 February 2007 Accepted: 30 May 2007 Published: 16 August 2007

Environmental context. Nitrous acid (HNO₂) is an important source of the hydroxyl radical (OH^•), the most important daytime oxidising species that contributes to the formation of ozone as well as of other secondary pollutants in the troposphere. Understanding the sources and sinks of HNO₂ is of crucial interest for accurately modelling the chemical composition of the troposphere and predicting future trace gas concentrations.

Abstract. Nitrous acid and several other atmospheric components and variables were continuously measured during complex field experiments at seven different suburban and rural sites in Europe. HNO₂ is mainly formed by heterogeneous processes and is often accumulated in the nighttime boundary layer. Our results confirm that the photolysis of HNO₂ is an important source of the hydroxyl radical, not only in the early morning hours but also throughout the entire day, and is often comparable with the contribution of ozone and formaldehyde photolysis. At all research sites unexpectedly high HNO₂ mixing ratios were observed during the daytime (up to several hundred ppt, or pmol mol^–1). Moreover, surprisingly, the HNO₂ mixing ratio at the three mountain sites often showed a broad maximum or several distinct peaks at midday and lower mixing ratios during the night. Assuming a quickly established photo-equilibrium between the known significant gas phase reactions, only a few ppt HNO₂ should be present around noon. The ratio of known sources to sinks indicates a missing daytime HNO₂ source of 160–2600 ppt h^–1 to make up the balance. Based on these values and on production mechanisms proposed in the literature we hypothesise that the daytime mixing ratio levels may only be explained by a fast electron transfer onto adsorbed NO₂.

Additional keywords: atmospheric chemistry, heterogeneous processes, hydroxyl radical, nitrous acid, photochemistry.

Acknowledgements

This work combines results from different joint research studies supported by the German Ministry of Education and Research (BMBF), the Deutsche Forschungsgemeinschaft (DFG) and the European Commission (EU). We thank all colleagues involved in the projects for excellent co-operation and the two anonymous reviewers for their careful revision of the manuscript.

References

[1] R. M. Harrison , J. D. Peak , G. M. Collins , Tropospheric cycle of nitrous acid. J. Geophys. Res. 1996 , 101, 14429.
        | Crossref | GoogleScholarGoogle Scholar |

[2] G. Lammel , N. J. Cape , Nitrous acid and nitrite in the atmosphere. Chem. Soc. Rev. 1996 , 25, 361.
        | Crossref | GoogleScholarGoogle Scholar |

[3] T. R. Rasmussen , M. Brauer , S. Kjærgaard , Effects of nitrous acid exposure on human mucous membranes. Am. J. Respir. Crit. Care Med. 1995 , 151, 1504.
        | PubMed |

[4] A. Febo , C. Perrino , Measurement of high concentration of nitrous acid inside automobiles. Atmos. Environ. 1995 , 29, 345.
        | Crossref | GoogleScholarGoogle Scholar |

[5] P. J. Crutzen , P. H. Zimmermann , The changing photochemistry of the troposphere. Tellus 1991 , 43, 136.


[6] Finlayson-Pitts B. J., Pitts J. N., in Chemistry of the Upper and Lower Atmosphere: Theory, Experiments and Applications 2000, pp. 269–272 (Academic Press: San Diego).

[7] R. W. Stockwell , J. G. Calvert , The near ultraviolet absorption spectrum of gaseous HONO and N₂O₃. J. Photochem. 1978 , 8, 193.
        | Crossref | GoogleScholarGoogle Scholar |

[8] D. Perner , U. Platt , Detection of nitrous acid in the atmosphere by differential optical absorption. Geophys. Res. Lett. 1979 , 6, 917.


[9] U. Platt , D. Perner , Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂ and SO₂ by differential optical absorption in the near UV. J. Geophys. Res. 1980 , 85, 7453.


[10] G. W. Harris , W. P. L. Carter , A. M. Winer , J. N. Pitts , U. Platt , D. Perner , Observations of nitrous acid in the Los Angeles atmosphere and implications for the predictions of ozone-precursor relationships. Environ. Sci. Technol. 1982 , 16, 414.
        | Crossref | GoogleScholarGoogle Scholar |

[11] M. E. Jenkin , R. A. Cox , D. J. Williams , Laboratory studies of the kinetics of formation of nitrous acid from the thermal reaction of nitrogen dioxide and water vapour. Atmos. Environ. 1988 , 22, 487.
        | Crossref | GoogleScholarGoogle Scholar |

[12] J. G. Calvert , G. Yarwood , A. M. Dunker , An evaluation of the mechanism of nitrous acid formation in the urban atmosphere. Res. Chem. Intermediat. 1994 , 20, 463.


[13] A. Febo , C. Perrino , I. Allegrini , Measurement of nitrous acid in Milan, Italy, by DOAS and diffusion denuders. Atmos. Environ. 1996 , 30, 3599.
        | Crossref | GoogleScholarGoogle Scholar |

[14] T. Staffelbach , A. Neftel , A. Blatter , A. Gut , M. Fahrni , J. Stählin , A. Prévôt , A. Hering , et al. Photochemical oxidant formation over Southern Switzerland, 1. Results from summer 1994. J. Geophys. Res. 1997 , 102, 23345.
        | Crossref | GoogleScholarGoogle Scholar |

[15] J. Kleffmann , R. Kurtenbach , J. Lörzer , P. Wiesen , N. Kalthoff , B. Vogel , H. Vogel , Measured and simulated vertical profiles of nitrous acid – Part I: Field measurements. Atmos. Environ. 2003 , 37, 2949.
        | Crossref | GoogleScholarGoogle Scholar |

[16] T. Staffelbach , A. Neftel , L. W. Horowitz , Photochemical oxidant formation over souther Switzerland, 2. Model results. J. Geophys. Res. 1997 , 102, 23363.
        | Crossref | GoogleScholarGoogle Scholar |

[17] B. Aumont , F. Chervier , S. Laval , Contribution of HONO sources to the NO_x/HO_x/O₃ chemistry in the polluted boundary layer. Atmos. Environ. 2003 , 37, 487.
        | Crossref | GoogleScholarGoogle Scholar |

[18] B. Vogel , H. Vogel , J. Kleffmann , R. Kurtenbach , Measured and simulated vertical profiles of nitrous acid – Part II. Model simulations and indications for a photolytic source. Atmos. Environ. 2003 , 37, 2957.
        | Crossref | GoogleScholarGoogle Scholar |

[19] B. Alicke , U. Platt , J. Stutz , Impact of nitrous acid photolysis on the total hydroxyl radical budget during the Limitation of Oxidant Production/Pianura Padana Produzione di Ozono study in Milan. J. Geophys. Res. 2002 , 107, 8196.
        | Crossref | GoogleScholarGoogle Scholar |

[20] X. Zhou , H. J. Beine , R. E. Honrath , J. D. Fuentes , W. Simpson , P. B. Shepson , J. W. Bottenheim , Snowpack photchemical production of HONO: a major source of OH in the Arctic boundary layer in springtime. Geophys. Res. Lett. 2001 , 28, 4087.
        | Crossref | GoogleScholarGoogle Scholar |

[21] X. Zhou , K. Civerolo , H. Dai , G. Huang , J. Schwab , K. Demerjian , Summertime nitrous acid chemistry in the atmospheric boundary layer at a rural site in New York State. J. Geophys. Res. 2002 , 107, 4590.
        | Crossref | GoogleScholarGoogle Scholar |

[22] J. Stutz , B. Alicke , A. Neftel , Nitrous acid formation in the urban atmosphere: Gradient measurements of NO₂ and HONO over grass in Milan. J. Geophys. Res. 2002 , 107, 8192.
        | Crossref | GoogleScholarGoogle Scholar |

[23] B. Alicke , A. Geyer , A. Hofzumahaus , F. Holland , S. Konrad , H.-W. Pätz , J. Schäfer , J. Stutz , et al. OH formation by HNO₂ photolysis during the BERLIOZ experiment. J. Geophys. Res. 2003 , 108, 8247.
        | Crossref | GoogleScholarGoogle Scholar |

[24] Trick S., Formation of Nitrous Acid on Urban Surfaces-A Physical-Chemical Perspective (Ph.D. thesis), 2004, 290 pp. (University of Heidelberg).

[25] J. Kleffmann , T. Gavriloaiei , A. Hofzumahaus , F. Holland , R. Koppmann , L. Rupp , E. Schlosser , M. Siese , et al. Daytime formation of nitrous acid: a major source of OH radicals in a forest. Geophys. Res. Lett. 2005 , 32, L05818.
        | Crossref | GoogleScholarGoogle Scholar |

[26] K. Acker , A. Febo , S. Trick , C. Perrino , P. Bruno , P. Wiesen , D. Möller , W. Wieprecht , et al. Nitrous acid in the urban area of Rome. Atmos. Environ. 2006 , 40, 3123.
        | Crossref | GoogleScholarGoogle Scholar |

[27] K. Acker , D. Möller , W. Wieprecht , F. X. Meixner , B. Bohn , S. Gilge , C. Plass-Dülmer , H. Berresheim , Strong daytime production of OH from HNO₂ at a rural mountain site. Geophys. Res. Lett. 2006 , 33, L02809.
        | Crossref | GoogleScholarGoogle Scholar |

[28] M. D. Andrés-Hernández , J. Notholt , J. Hjorth , O. Schrems , A DOAS study on the origin of nitrous acid at urban and non-urban sites. Atmos. Environ. 1996 , 30, 175.
        | Crossref | GoogleScholarGoogle Scholar |

[29] P. K. Simon , P. K. Dasgupta , Continuous automated measurement of gaseous nitrous and nitric acids and particulate nitrite and nitrate. Environ. Sci. Technol. 1995 , 29, 1534.
        | Crossref | GoogleScholarGoogle Scholar |

[30] C. Zellweger , M. Ammann , P. Hofer , U. Baltensperger , NO_y speciation with a combined wet effluent diffusion denuder – aerosol collector coupled to ion chromatography. Atmos. Environ. 1999 , 33, 1131.
        | Crossref | GoogleScholarGoogle Scholar |

[31] M. Löflund , A. Kasper-Giebl , W. Tscherwenka , M. Schmid , H. Giebl , R. Hitzenberger , G. Reischl , H. Puxbaum , The performance of a gas and a aerosol monitoring system (GAMS) fort he determination of acidic water soluble organic and inorganic gases and ammonia as well as related particles from the atmosphere. Atmos. Environ. 2001 , 35, 2861.
        | Crossref | GoogleScholarGoogle Scholar |

[32] K. Acker , G. Spindler , E. Brüggemann , Nitrous and nitric acid measurements during the INTERCOMP2000 campaign in Melpitz. Atmos. Environ. 2004 , 38, 6497.
        | Crossref | GoogleScholarGoogle Scholar |

[33] K. Acker , D. Möller , R. Auel , W. Wieprecht , D. Kalaß , Concentrations of nitrous acid, nitric acid, nitrite and nitrate in the gas and aerosol phase at a site in the emission zone during ESCOMPTE 2001 experiment. Atmos. Res. 2005 , 74, 507.
        | Crossref | GoogleScholarGoogle Scholar |

[34] G. Huang , X. Zhou , G. Deng , H. Qiao , K. Civerolo , Measurements of atmospheric nitrous acid and nitric acid. Atmos. Environ. 2002 , 36, 2225.
        | Crossref | GoogleScholarGoogle Scholar |

[35] H. J. Beine , A. Amoroso , G. Esposito , R. Sparapani , A. Ianniello , T. Georgiadis , M. Nardino , P. Bonasoni , et al. Deposition of atmospheric nitrous acid on alkaline snow surfaces. Geophys. Res. Lett. 2005 , 32, L10808.
        | Crossref | GoogleScholarGoogle Scholar |

[36] N. Takenaka , H. Terada , Y. Oro , M. Hiroi , H. Yoshikawa , K. Okitsu , H. Bandow , A new method for the measurement of trace amounts of HONO in the atmosphere using an air dragged aqua-membrane-type denuder and fluorescence detection. Analyst 2004 , 129, 1130.
        | Crossref | GoogleScholarGoogle Scholar | PubMed |

[37] Z. Genfa , S. Slanina , C. B. Boring , P. A. C. Jongejan , P. K. Dasgupta , Continuous wet denuder measurements of atmospheric nitric and nitrous acids during the 1999 Atlanta Supersite. Atmos. Environ. 2003 , 37, 1351.
        | Crossref | GoogleScholarGoogle Scholar |

[38] K. C. Clemitshaw , A review of instrumentation and measurement techniques for ground-based and airborne field studies of gas phase tropospheric chemistry. Crit. Rev. Environ. Sci. Technol. 2004 , 34, 1.
        | Crossref | GoogleScholarGoogle Scholar |

[39] W. Liao , A. Hecobian , J. Mastromarino , D. Tan , Development of a photo-fragmentationIlaser-induuced fluoresscence measurememt of atmospheric nitrous acid. Atmos. Environ. 2006 , 40, 17.
        | Crossref | GoogleScholarGoogle Scholar |

[40] A. M. Winer , H. W. Biermann , Long pathlength differential optical absorption spectroscopy (DOAS) measurements of gaseous HONO, NO₂ and HCHO in the California south coast air basin. Res. Chem. Intermediat. 1994 , 20, 423.


[41] A. Neftel , A. Blatter , R. Hesterberg , T. Staffelbach , Measurements of concentration gradients of HNO₂ and HNO₃ over a semi-natural ecosystem. Atmos. Environ. 1996 , 30, 3017.
        | Crossref | GoogleScholarGoogle Scholar |

[42] X. Ren , H. Harder , M. Martinez , R. L. Lesher , A. Oliger , T. Shirley , J. Adams , J. B. Simpas , et al. OH and HO₂ Chemistry in Urban Atmosphere of New York City. Atmos. Environ. 2003 , 37, 3639.
        | Crossref | GoogleScholarGoogle Scholar |

[43] Seinfeld J. H., Pandis S. N., in Atmospheric Chemistry and Physics 1996, pp. 250–253 (Wiley & Sons: New York).

[44] R. Kurtenbach , K. H. Becker , J. A. G. Gomes , J. Kleffmann , J. Lörzer , M. Spittler , P. Wiesen , R. Ackermann , et al. Investigations of emissions and heterogeneous formation of HONO in a road traffic tunnel. Atmos. Environ. 2001 , 35, 3385.
        | Crossref | GoogleScholarGoogle Scholar |

[45] T. W. Kirchstetter , R. A. Harley , D. Littlejohn , Measurement of nitrous acid in motor vehicle exhaust. Environ. Sci. Technol. 1996 , 30, 2843.
        | Crossref | GoogleScholarGoogle Scholar |

[46] S. Mertes , A. Wahner , Uptake of nitrogen dioxide and nitrous acid on aqueous surfaces. J. Phys. Chem. 1995 , 99, 14000.
        | Crossref | GoogleScholarGoogle Scholar |

[47] M. Ammann , M. Kalberer , D. T. Jost , L. Tobler , E. Rössler , D. Piguet , H. W. Gäggeler , U. Baltensperger , Heterogeneous production of nitrous acid on soot in polluted air masses. Nature 1998 , 395, 157.
        | Crossref | GoogleScholarGoogle Scholar |

[48] H. M. TenBrink , H. Spoelstra , The dark decay of HONO in environmental (SMOG) chambers. Atmos. Environ. 1998 , 32, 247.
        | Crossref | GoogleScholarGoogle Scholar |

[49] J. Kleffmann , K. H. Becker , P. Wiesen , Heterogeneous NO2 conversion processes on acid surfaces: possible atmospheric implications. Atmos. Environ. 1998 , 32, 2721.
        | Crossref | GoogleScholarGoogle Scholar |

[50] N. A. Saliba , M. Mochida , B. J. Finlayson Pitts , Laboratory studies of sources of HONO in polluted urban atmospheres. Geophys. Res. Lett. 2000 , 27, 3229.
        | Crossref | GoogleScholarGoogle Scholar |

[51] X. Zhou , Y. He , G. Huang , T. D. Thornberry , M. A. Carroll , S. B. Bertman , Photochemical production of nitrous acid on glass sample manifold surface. Geophys. Res. Lett. 2002 , 29,
        | Crossref | GoogleScholarGoogle Scholar |

[52] B. J. Finlayson-Pitts , L. M. Wingen , A. L. Sumner , D. Syomin , K. A. Ramazan , The heterogeneous hydrolysis of NO₂ in laboratory systems and in outdoor and indoor atmospheres: An integrated mechanism. Phys. Chem. Chem. Phys. 2003 , 5, 223.
        | Crossref | GoogleScholarGoogle Scholar |

[53] F. Rohrer , B. Bohn , T. Brauers , D. Brüning , F.-J. Johnen , A. Wahner , J. Kleffmann , Characterisation of the photolytic HONO-source in the atmosphere simulation chamber SAPHIR. Atmos. Chem. Phys. 2005 , 5, 2189.


[54] Veitel H., Vertical Profiles of NO₂ and HONO in the Planetary Boundary Layer (Ph.D. thesis) 2002, 270 pp. (University of Heidelberg).

[55] R. M. Harrison , N. Kitto , Evidence for a surface source of atmospheric nitrous acid. Atmos. Environ. 1994 , 28, 1089.
        | Crossref | GoogleScholarGoogle Scholar |

[56] K. Acker , D. Möller , W. Wieprecht , R. Auel , D. Kalass , W. Tscherwenka , Nitrous and nitric acid measurements inside and outside of clouds at Mt. Brocken. Water, Air, Soil Pollut. 2001 , 130, 331.
        | Crossref | GoogleScholarGoogle Scholar |

[57] J. Notholt , J. Hjorth , F. Raes , Formation of HNO₂ on aerosol surfaces during foggy periods in the presence of NO and NO₂ Atmos. Environ. 1992 , 26A, 211.


[58] A. R. Reisinger , Observations of HNO₂ in the polluted winter atmosphere: possible heterogeneous production on aerosols. Atmos. Environ. 2000 , 34, 3865.
        | Crossref | GoogleScholarGoogle Scholar |

[59] K. A. Ramazan , D. Syomin , B. J. Finlayson-Pitts , The photochemical production of HONO during the heterogeneous hydrolysis of NO₂. Phys. Chem. Chem. Phys. 2004 , 6, 3836.
        | Crossref | GoogleScholarGoogle Scholar |

[60] H. Akimoto , H. Takagi , F. Sakamaki , Photo-enhancement of the nitrous acid formation in the surface reaction of nitrogen dioxide and water vapour: Extra radical source in smog chamber experiments. Int. J. Chem. Kinet. 1987 , 19, 539.
        | Crossref | GoogleScholarGoogle Scholar |

[61] R. E. Honrath , Y. Lu , M. C. Peterson , J. E. Dibb , M. A. Arsenault , N. J. Cullen , K. Steffen , Vertical fluxes of NO_x, HONO, and HNO₃ above the snowpack at Summit, Greenland. Atmos. Environ. 2002 , 36, 2629.
        | Crossref | GoogleScholarGoogle Scholar |

[62] X. Zhou , H. Gao , Y. He , G. Huang , S. Bertman , K. Civerolo J. Schwab, Nitric acid photolysis on surfaces in low-NO_x environments: Significant atmospheric implications. Geophys. Res. Lett. 2003 , 30, 2217.
        | Crossref | GoogleScholarGoogle Scholar |

[63] K. C. Clemitshaw , Coupling between the tropospheric photochemistry of nitrous acid (HONO) and nitric acid (HNO₃). Environ. Chem. 2006 , 3, 31.
        | Crossref | GoogleScholarGoogle Scholar |

[64] H. J. Beine , A. Amoroso , F. Domine , M. D. King , M. Nardino , A. Ianniello , J. L. France , Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica. Atmos. Chem. Phys. 2006 , 6, 2569.


[65] C. George , R. S. Strekowski , J. Kleffmann , K. Stemmler , M. Ammann , Photoenhanced uptake of gaseous NO₂ on solid organic compounds: a photochemical source of HNO₂? Faraday Discuss. 2005 , 130, 195.
        | Crossref | GoogleScholarGoogle Scholar | PubMed |

[66] K. Stemmler , M. Ammann , C. Donders , J. Kleffmann , C. George , Photosensitized reduction of nitrogen dioxide on humic acid as a source of nitrous acid. Nature 2006 , 440, 195.
        | Crossref | GoogleScholarGoogle Scholar | PubMed |

[67] I. Bejan , Y. Abd El Aal , I. Barnes , T. Benter , B. Bohn , P. Wiesen , J. Kleffmann , The photolysis of ortho-nitrophenols: a new gas phase source of HONO. Phys. Chem. Chem. Phys. 2006 , 8, 2028.
        | Crossref | GoogleScholarGoogle Scholar | PubMed |

[68] K. Acker , S. Mertes , D. Möller , W. Wieprecht , R. Auel , D. Kalass , Case study of cloud physical and chemical processes in low clouds at Mt. Brocken. Atmos. Res. 2002 , 64, 41.
        | Crossref | GoogleScholarGoogle Scholar |

[69] F. Beyrich , K. Acker , D. Kalaß , O. Klemm , D. Möller , E. Schaller , J. Werhahn , U. Weissensee , Boundary layer structure and photochemical pollution in the Harz Mountains – an observational study. Atmos. Environ. 1996 , 30, 1271.
        | Crossref | GoogleScholarGoogle Scholar |

[70] G. Spindler , K. Müller , E. Brüggemann , T. Gnauk , H. Herrmann , Long-term size-segregated characterization of PM10, PM2.5, and PM1 at the IfT research station Melpitz downwind of Leipzig (Germany) using high and low-volume filter samplers. Atmos. Environ. 2004 , 38, 5333.
        | Crossref | GoogleScholarGoogle Scholar |

[71] K. Müller , G. Spindler , W. Maenhaut , R. Hitzenberger , W. Wieprecht , U. Baltensperger , H. ten Brink, INTERCOMP2000, a campaign to assess the comparability of methods in use in Europe for measuring aerosol composition. Atmos. Environ. 2004 , 38, 6459.
        | Crossref | GoogleScholarGoogle Scholar |

[72] C. Perrino , A. Pietrodangelo , A. Febo , An atmospheric stability index based on radon progeny measurements for the evaluation of primary urban pollution. Atmos. Environ. 2001 , 35, 5235.
        | Crossref | GoogleScholarGoogle Scholar |

[73] B. Cros , P. Durand , H. Cachier , Ph. Drobinski , E. Frejafon , C. Kottmeïer , P. E. Perros , V.-H. Peuch , et al. The ESCOMPTE program: an overview. Atmos. Res. 2004 , 69, 241.
        | Crossref | GoogleScholarGoogle Scholar |

[74] F. Cousin , P. Tulet , R. Rosset , Interaction between local and regional polluted layers in the low troposphere: impact on surface concentrations during ESCOMPTE 2001, IOP2. Atmos. Res. 2005 , 74, 117.
        | Crossref | GoogleScholarGoogle Scholar |

[75] K. Acker , W. Wieprecht , D. Möller , Chemical and physical characterisation of low clouds: results from the ground based cloud experiment FEBUKO. Arch. Ind. Hyg. Toxicol. 2003 , 54, 231.


[76] H. Herrmann , R. Wolke , K. Müller , FEBUKO and MODMEP: Field measurements and modelling of aerosol and cloud multiphase processes. Atmos. Environ. 2005 , 39, 4169.
        | Crossref | GoogleScholarGoogle Scholar |

[77] K. Müller , D. van Pinxteren , A. Plewka , B. Svrcina , H. Kramberger , D. Hofmann , K. Bächmann , H. Herrmann , Aerosol characterisation at the FEBUKOupwind station Goldlauter (II): detailed organic chemical characterisation. Atmos. Environ. 2005 , 39, 4219.
        | Crossref | GoogleScholarGoogle Scholar |

[78] G. H. Handisides , C. Plass-Dülmer , S. Gilge , H. Bingemer , H. Berresheim , Hohenpeissenberg photochemical experiment (HOPE 2000): Measurements and photostationary state calculations of OH and peroxy radicals. Atmos. Chem. Phys 2003 , 3, 1565.


[79] K. Mannschreck , S. Gilge , C. Plass-Dülmer , W. Fricke , H. Berresheim , Assessment of the applicability of NO-NO₂–O₃ photostationary state to long-term measurements at the Hohenpeissenberg GAW station, Germany. Atmos. Chem. Phys. 2004 , 4, 1265.


[80] A. Kraus , A. Hofzumahaus , Field measurements of atmospheric photolysis frequencies for O₃, NO₂, HCHO, CH₃CHO, H₂O₂, and HONO by UV spectroradiometry. J. Atmos. Chem. 1998 , 31, 161.
        | Crossref | GoogleScholarGoogle Scholar |

[81] H. Berresheim , T. Este , C. Plass-Dülmer , F. L. Eisele , D. Tanner , Chemical ionisation mass spectrometer for long-term measurements of atmospheric OH and H₂SO₄. Int. J. Mass Spectrom. 2000 , 202, 91.
        | Crossref | GoogleScholarGoogle Scholar |

[82] J. Stutz , B. Alicke , R. Ackermann , A. Geyer , S. Wang , A. B. White , E. J. Williams , C. W. Spicer , et al. Relative humidity dependence of HONO chemistry in urban areas. J. Geophys. Res. 2004 , 109, D03307.
        | Crossref | GoogleScholarGoogle Scholar |

[83] J. Lüttke , K. Levsen , K. Acker , W. Wieprecht , D. Möller , Phenols and nitrated phenols in clouds at Mt. Brocken. Int. J. Environ. Anal. Chem. 1999 , 74, 69.
        | Crossref | GoogleScholarGoogle Scholar |

[84] K. Acker , D. Beysens , D. Möller , Nitrite in dew, fog, cloud and rain water – An indicator for heterogeneous processes on surfaces. Atmos. Res. 2007 ,


[85] Wiesen P. (scientific coordinator), Nitrous Acid and its Influence on the Oxidation Capacity of the Atmosphere (NITROCAT) 2003, Final EU Project Report EVK2-CT-1999-00025.

[86] F. L. Eisele , G. H. Mount , D. Tanner , A. Jefferson , R. Shetter , J. W. Harder , E. J. Williams , Understanding the production and interconversion of the hydroxyl radical during the tropospheric OH photochemistry experiment. J. Geophys. Res. 1997 , 102, 6457.
        | Crossref | GoogleScholarGoogle Scholar |

[87] F. Holland , U. Aschmutat , M. Hessling , A. Hofzumahaus , D. H. Ehhalt , Highly time resolved measurements of OH during POPCORN using laser-induced fluorescence spectroscopy. J. Atmos. Chem. 1998 , 31, 205.
        | Crossref | GoogleScholarGoogle Scholar |

[88] F. Holland , A. Hofzumahaus , J. Schäfer , Measurements of OH and HO₂ Radical concentrations during BERLIOZ by Laser Induced Fluorescence Spectroscopy. J. Geophys. Res. 2003 , 108, 8246.
        | Crossref | GoogleScholarGoogle Scholar |

[89] J. Kleffmann , J. Heland , R. Kurtenbach , J. C. Lörzer , P. Wiesen , A new instrument for the Detection of Nitrous Acid (HONO). Environ. Sci. Pollut. R. 2002 , 9, 48.


[90] R. Atkinson , D. L. Baulch , R. A. Cox , J. N. Crowley , R. F. Hampson , R. G. Hynes , M. E. Jenkin , M. J. Rossi , et al. Evaluated kinetic and photochemical data for atmospheric chemistry: Volume I – Gas phase reactions of O_x, HO_x, NO_x and SO_x species. Atmos. Chem. Phys. 2004 , 4, 1461.


[91] R. G. Prinn , R. F. Weiss , B. R. Miller , J. Huang , F. N. Alyea , D. M. Cunnold , P. J. Fraser , D. E. Hartley , Atmospheric trends and lifetime of CH₃CCl₃ and global OH concentrations. Science 1995 , 269, 187.
        | Crossref | GoogleScholarGoogle Scholar |

[92] F. Rohrer , H. Berresheim , Strong correlation between levels of tropospheric hydroxyl radicals and solar ultraviolet radiation. Nature 2006 , 442, 184.
        | Crossref | GoogleScholarGoogle Scholar | PubMed |

[93] M. A. J. Harrison , S. Barra , D. Borghesi , D. Vione , C. Arsene , K. I. Olariu , Nitrated phenols in the atmosphere: a review. Atmos. Environ. 2005 , 39, 231.
        | Crossref | GoogleScholarGoogle Scholar |

[94] B. C. Faust , C. Anastasio , J. M. Allen , T. Arakaki , Aqueous phase photochemical formation of peroxides in authentic cloud and fog waters. Science 1993 , 260, 73.
        | Crossref | GoogleScholarGoogle Scholar | PubMed |

[95] S. E. Paulson , J. J. Orlando , The reactions of ozone with alkenes: an important source of HOx in the boundary layer. Geophys. Res. Lett. 1996 , 23, 3727.
        | Crossref | GoogleScholarGoogle Scholar |

[96] R. Schimang , A. Folkers , J. Kleffmann , E. Kleist , M. Miebach , J. Wildt , Uptake of gaseous nitrous acid (HONO) by several plant species. Atmos. Environ. 2006 , 40, 1324.
        | Crossref | GoogleScholarGoogle Scholar |

Atmospheric variation of nitrous acid at different sites in Europe

Acknowledgements

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