pure and applied geophysics

, Volume 60, Issue 1, pp 189–196 | Cite as

Turbidometric estimations in Mexico city using the Volz sun photometer

  • Ignacio G. Galindo


Measuring, with the aid of two filters, the instantaneous intensity of the solar radiation in two wave lengths (λ B = 0.44 μ, λ R = 0.64 μ) by means of a sun photometer designed byVolz, we carried out determinations of the decadic turbidity coefficientB (λ=0.5 μ) and the wave length exponent α of the haze extinction for Mexico City. Observations were made for almost two and a half years (1960 to 1962 period). A seasonal size distribution in both parameters was found. Although the data thus obtained are provenient of a contaminated atmosphere, comparison of our data is made with those found for higher latitudes ofÅngström, Schüepp andVolz. The height of the homogeneous haze layerH D was calculated showing pronounced variations for a given wind direction. The maximum and minimum values ofB enable us to get, by the first approximation, the aerosol size distribution ofJunge for our latitudes. However, for exceptional very clear days having maximum actinometric intensity of the solar radiation the sensitivity of the microamperimeter in theVolz sun photometer fails.


Radiation Atmosphere Solar Radiation Turbidity High Latitude 
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Copyright information

© Birkhäuser Verlag 1965

Authors and Affiliations

  • Ignacio G. Galindo
    • 1
  1. 1.Instituto de Geofísica, Sección de Radiación SolarUniversidad Nacional de MéxicoMexico City

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