Advertisement

pure and applied geophysics

, Volume 158, Issue 4, pp 821–838 | Cite as

Determination of Ångström and Schüepp's Parameters from Ground-based Spectral Measurements of Beam Irradiance in the Ultraviolet and Visible Spectrum in Athens, Greece

  • H.D. Kambezidis
  • A.D. Adamopoulos
  • D. Zevgolis

Abstract

 — This work estimates the Ångström coefficients, assuming a linear behavior of the natural logarithm of aerosol optical thickness, ln δα(λ), versus the natural logarithm of wavelength, ln λ, in the urban environment of Athens for a period of one year. The calculation of the coefficients α, β, was carried out using records of spectral beam irradiance in the 320–575 nm spectral range. The seasonal and diurnal variation of the coefficients shows different features with generally higher values of β and lower values of α in summertime. The Ångström coefficients are investigated with respect to various wind regimes and the results are discussed with a view to air pollution sources, climatic and topographic characteristics of the Athens basin. A similar study is also carried out for the Schüepp's turbidity parameter.

Key words: Atmospheric turbidity, Ångström turbidity coefficients, Schüepp turbidity parameter. 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Birkhäuser Verlag Basel, 2001

Authors and Affiliations

  • H.D. Kambezidis
    • 1
  • A.D. Adamopoulos
    • 1
  • D. Zevgolis
    • 2
  1. 1.Atmospheric Research Team, Institute of Environmental Research and Sustainable Development, National Observatory of Athens, P.O. Box 20048, GR-11810, Athens, Greece. E-mail: harry@env.meteo.noa.grGR
  2. 2.Department of Physics, University of Patras, GR-26500, Patras, Greece. E-mail: zevgolis@physics.upatras.grGR

Personalised recommendations