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Determination of atmospheric turbidity parameters from spectral solar radiation measurements

Bestimmung atmosphärischer Trübungsparameter aus spektralen Sonnenstrahlungsmessungen

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Summary

The extinction coefficient of the atmosphere was determined from solar intensity measurements in two spectral bands, isolated by interference filters with peak transmissions at 380 nm and 500 nm, respectively.

The turbidity parameters α andB, as obtained from the extinction coefficients, show a considerable annual variation, having a maximum in summer and a minimum in winter. Of special interest are the negative values which are obtained for the wavelength exponent α. These are discussed in relation to the “power law size distribution” for the aerosols, as proposed by Junge [1, 2].

Zusammenfassung

Der Extinktionskoeffizient der Atmosphäre wird aus Sonnenstrahlungsmessungen in zwei Spektralbereichen mittels Interferenzfiltern mit Durchlässigkeitsmaxima bei 380 nm und bei 500 nm bestimmt.

Die aus den Extinktionskoeffizienten erhaltenen Trübungsparameter α undB zeigen einen deutlichen Jahresgang mit einem Maximum im Sommer und einem Minimum im Winter. Von besonderem Interesse sind die festgestellten negativen Werte des Wellenlängenexponenten α. Diese werden in ihrem Zusammenhang mit dem von Junge angegebenen Größenverteilungsgesetz für Aerosole diskutiert.

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References

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Hansen, V. Determination of atmospheric turbidity parameters from spectral solar radiation measurements. Arch. Met. Geoph. Biokl. B. 22, 301–308 (1974). https://doi.org/10.1007/BF02243475

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Keywords

  • Waste Water
  • Solar Radiation
  • Turbidity
  • Extinction Coefficient
  • Intensity Measurement