Articles | Volume 6, issue 10
Atmos. Meas. Tech., 6, 2659–2669, 2013
https://doi.org/10.5194/amt-6-2659-2013

Special issue: Tropospheric profiling (ISTP9)

Atmos. Meas. Tech., 6, 2659–2669, 2013
https://doi.org/10.5194/amt-6-2659-2013

Research article 15 Oct 2013

Research article | 15 Oct 2013

Retrieval of aerosol single-scattering albedo and polarized phase function from polarized sun-photometer measurements for Zanjan's atmosphere

A. Bayat1, H. R. Khalesifard1,2, and A. Masoumi3 A. Bayat et al.
  • 1Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
  • 2Center for Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
  • 3Department of Physics, Faculty of Sciences, University of Zanjan, Zanjan 45371-38791, Iran

Abstract. The polarized phase function of atmospheric aerosols has been investigated for the atmosphere of Zanjan, a city in northwest Iran. To do this, aerosol optical depth, Ångström exponent, single-scattering albedo, and polarized phase function have been retrieved from the measurements of a Cimel CE 318-2 polarized sun-photometer from February 2010 to December 2012. The results show that the maximum value of aerosol polarized phase function as well as the polarized phase function retrieved for a specific scattering angle (i.e., 60°) are strongly correlated (R = 0.95 and 0.95, respectively) with the Ångström exponent. The latter has a meaningful variation with respect to the changes in the complex refractive index of the atmospheric aerosols. Furthermore the polarized phase function shows a moderate negative correlation with respect to the atmospheric aerosol optical depth and single-scattering albedo (R = −0.76 and −0.33, respectively). Therefore the polarized phase function can be regarded as a key parameter to characterize the atmospheric particles of the region – a populated city in the semi-arid area and surrounded by some dust sources of the Earth's dust belt.