Photolysis Frequencies of Nitrogen Dioxide and Ozone: Measurements and Model Calculations

  • Joachim Reuder
  • Tullio Gori
  • Ansgar Ruggaber
  • Lucia Kins
  • Ralph Dlugi
Chapter
Part of the Transport and Chemical Transformation of Pollutants in the Troposphere book series (3373, volume 4)

Abstract

Photolysis of ozone at wavelengths below 320 nm is the main source of tropospheric OH radicals:
$${O_3} + hv \to O{(^1}{\text{D}}) + {O_2}$$
(1)
$$O{(^1}{\text{D}}) + {H_2}O \to 2\;OH$$
(2)
Photolysis of nitrogen dioxide occurs in the wavelength range below 420 nm and is the basic supposition of tropospheric ozone production:
$$N{O_2} + hv \to NO + O{(^3}{\text{P}})$$
(3)
$${O_2} + O{(^3}{\text{P}}) \to {O_3}$$
(4)
The reaction rate constants of the photolytic processes (1) and (3) are given by the photolysis frequencies J(O3) and J(NO2). An accurate knowledge of these quantities is the basis for numerical modelling of photochemical reaction cycles.

Keywords

Quartz Dioxide Ozone Photolysis 

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References

  1. 1.
    Ruggaber, A., R Dlugi, T. Nakajima, Modelling radiation quantities and photolysis frequencies in the troposphere, J. Atmos. Chem. 18 (1994) (171–210).CrossRefGoogle Scholar
  2. 2.
    Junkermann, W., U. Platt, A. Volz-Thomas, A photoelectric detector for the measurement of photolysis frequencies of ozone and other atmospheric molecules. J. Atmos. Chem. 8 (1989) 203–227.CrossRefGoogle Scholar
  3. 3.
    Reuder, J., Experimentelle Untersuchungen zum Einfluß atmosphärischer Parameter auf die Photolyse von Ozon in der bodennahen Troposphäre. Diplomarbeit, Ludwig-Maximilians-Universität München, 1991.Google Scholar
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    Gori, T., Bestimmung der NO2-Photolysefrequenz in der bodennahen Troposphäre mit Hilfe photoelektrischer Detektoren. Diplomarbeit, Ludwig-Maximilians-Universität München, 1995.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Joachim Reuder
    • 1
  • Tullio Gori
    • 1
  • Ansgar Ruggaber
    • 1
  • Lucia Kins
    • 1
  • Ralph Dlugi
    • 1
  1. 1.Meteorologisches InstitutUniversität MünchenMünchenGermany

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