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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amtd-5-6991-2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
21 Sep 2012
Review status
A revision of this discussion paper for further review has not been submitted.
Aerosol absorption retrieval at ultraviolet wavelengths in a complex environment
S. Kazadzis1, N. Kouremeti2, V. Amiridis3, A. Arola4, and E. Gerasopoulos1 1Institute of Environmental Research and Sustainable Development, National Observatory of Athens, Greece
2Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Greece
3Institute of Astronomy Astrophysics, space applications and remote sensing, National Observatory of Athens, Greece
4Finnish Meteorological Institute, Kuopio Unit, Finland
Abstract. We have combined sun and sky radiance measurements from a CIMEL sun-photometer and total and diffuse UV irradiance measurements with a multi-filter rotating shadow-band radiometer (UVMFR), in order to calculate aerosol absorption properties (single scattering albedo) in the UV range, for a 10 month period in Athens, Greece. The aerosol extinction optical thickness measured by the CIMEL instrument has been used for the inter-calibration of the UVMFR. The measurements from both instruments were used as input to a radiative transfer model and the single scattering albedo (SSA) for 368 nm and 332 nm has been calculated. The SSA values at these wavelengths, together with synchronous SSA, CIMEL-derived, retrievals at 440 nm, show a mean of 0.88, 0.86 and 0.80, with lowest values (higher absorption) towards lower wavelengths. In addition, noticeable diurnal variations of the SSA in all wavelengths are revealed, with amplitudes in the order of 0.05. Higher SSA wavelength dependence is found for cases of lower Ångström exponents and also an SSA decrease with decreasing extinction optical depth, suggesting an effect of the different aerosol composition.

Citation: Kazadzis, S., Kouremeti, N., Amiridis, V., Arola, A., and Gerasopoulos, E.: Aerosol absorption retrieval at ultraviolet wavelengths in a complex environment, Atmos. Meas. Tech. Discuss., 5, 6991-7023, doi:10.5194/amtd-5-6991-2012, 2012.
S. Kazadzis et al.
Interactive discussionStatus: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C3128: 'Review', Anonymous Referee #1, 03 Dec 2012 Printer-friendly Version 
SC C3133: 'UVMFR Instrument calibration', Stylianos Kazadzis, 03 Dec 2012 Printer-friendly Version 
 
RC C3168: 'Interactive comment on Kazadzis , et al., “Aerosol absorption retrieval at ultraviolet wavelengths in a complex environment”', Anonymous Referee #2, 05 Dec 2012 Printer-friendly Version 
S. Kazadzis et al.
S. Kazadzis et al.

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