Journal of Atmospheric Chemistry

, Volume 13, Issue 3, pp 265–288 | Cite as

A modified profile method for determining the vertical fluxes of NO, NO2, ozone, and HNO3 in the atmospheric surface layer

  • Gerhard Kramm
  • Hans Müller
  • David Fowler
  • Klaus D. Höfken
  • Franz X. Meixner
  • Eberhard Schaller


A modified profile method for determining the vertical deposition (or/and exhalation) fluxes of NO, NO2, ozone, and HNO3 in the atmospheric surface layer is presented. This method is based on the generally accepted micrometeorological ideas of the transfer of momentum, sensible heat and matter near the Earth's surface and the chemical reactions among these trace gases. The analysis (aerodynamic profile method) includes a detailed determination of the micrometeorological quantities (such as the friction velocity, the fluxes of sensible and latent heat, the roughness length and the zero plane displacement), and of the height-invariant fluxes of the composed chemically conservative trace gases with ‘group’ concentrations c1=[NO]+[NO2]+[HNO3], c2=[NO2]+[O3]+3/2·[HNO3], and c3=[NO]−[O3]−1/2·[HNO3]. The fluxes of the ‘individual’ species are finally determined by the numerical solution of a system of coupled nonlinear ordinary differential equations for the concentrations of ozone and HNO3 (‘decoding’ method). The parameterization of the fluxes is based on the flux-gradient relationships in the turbulent region of the atmospheric surface layer. The model requires only the vertical profile data of wind velocity, temperature and humidity and concentrations of NO, NO2, ozone, and HNO3.

The method has been applied to vertical profile data obtained at Jülich (September 1984) and collected in the BIATEX joint field experiment LOVENOX (Halvergate, U.K., September 1989).

Key words

Biosphere-atmosphere exchange dry deposition tlux-gradient relationships HNO3 fluxes NO fluxes NO2 fluxes ozone fluxes resistance approach turbulent transfer 


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Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • Gerhard Kramm
    • 1
  • Hans Müller
    • 1
  • David Fowler
    • 2
  • Klaus D. Höfken
    • 3
  • Franz X. Meixner
    • 1
  • Eberhard Schaller
    • 1
  1. 1.Fraunhofer-Institut für Atmosphärische Umweltforschung (IFU)Garmisch-PartenkirchenGermany
  2. 2.Institute of Terrestrial Ecology (ITE)PenicuikScotland, U.K.
  3. 3.GST-Forschungszentrum für Umwelt und GesundheitProjektträger für Umwell-und KlimaforschungMunchenGermany

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