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AGU: Journal of Geophysical Research, Atmospheres

 

Keywords

  • aerosol optical depth
  • Langley plot
  • diurnal aerosol cycle

Index Terms

  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Composition and Structure: Troposphere: composition and chemistry
  • Electromagnetics: Instruments and techniques
Abstract
Cited By (2)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112, D06205, 4 PP., 2007
doi:10.1029/2006JD007248

On Langley plots in the presence of a systematic diurnal aerosol cycle centered at noon: A comment on recently proposed methodologies

Franco Marenco

Physics Department, University of Genova, Genova, Italy

This short paper contains a discussion on the use of Langley plots for Sun photometer and Brewer spectroradiometer calibration in the presence of a diurnal aerosol cycle. It is shown that with Langley plots alone, it is impossible to correctly identify or remove atmospheric variations having a 24-hour periodicity with an extreme at local noon. Therefore experimentalists must either be able to exclude such a periodicity using additional measurements, or approach different calibration techniques such as the approximation by linear sections.

Received 1 March 2006; accepted 8 November 2006; published 17 March 2007.

Citation: Marenco, F. (2007), On Langley plots in the presence of a systematic diurnal aerosol cycle centered at noon: A comment on recently proposed methodologies, J. Geophys. Res., 112, D06205, doi:10.1029/2006JD007248.

Cited By

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