Advances in Science and Research www.adv-sci-res.net 1992-0628 1992-0636 2 7th EMS Annual Meeting and 8th European Conference on Applications of Meteorology 2007 2008 10.5194/asr-2-5-2008 http://www.adv-sci-res.net/2/5/2008/ http://www.adv-sci-res.net/2/5/2008/asr-2-5-2008.html http://www.adv-sci-res.net/2/5/2008/asr-2-5-2008.pdf 5 8 2008-04-07 Analysis of aerosol optical depth evaluation in polar regions and associated uncertainties P. Ortiz de Galisteo jportiz@goa.uva.es C. Toledano V. Cachorro E. Rodríguez A. de Frutos GOA-UVA Atmospheric Optics Group of the University of Valladolid, Spain INM National Institute of Meteorology, Madrid, Spain Some available processing algorithms used to calculate the aerosol optical depth from radiometric measurements were tested. The aim was to evaluate the associated uncertainties in polar regions due to the data processing, in order to adjust the methodology of the calculation and illustrate the importance of these error sources. The measurements were obtained during a sun photometer campaign in Ny-Ålesund within the framework of the POLAR-AOD project. Bird, R. E. and Riordan, C.: Simple solar spectral model for direct and diffuse irradiance on horizontal and tilted planes at the Earth's surface for cloudless atmospheres, J. Clim. Appl. Meteorol. 25, 87–97, 1986. Bodhaine, B. A., Word, N. B., Dutton, E. G., and Slusser, J. R.: On Rayleigh Optical Depth Calculations, J. Atmos. Ocean. Tech, 16, 185–1861, 1999. Fröhlich, C. and Shaw, G. E.: New determination of Rayleigh scattering in the terrestrial atmosphere, Appl. Optics, 19, 1773–1775, 1980. Gueymard C.: SMARTS2 A simple model of atmospheric radiative transfer of sunshine, Report FSEC-PF-270-95, Florida Solar Energy Center, 1995. Hansen, J. E. and Travis, L. D.: Light Scattering in Planetary Atmospheres, Space Sci. Rev. 16, 527–610, doi:10.1007/BF00168069, 1974. Kasten, F. and Young, A. T.: Revised optical air mass tables and approximation formula, Appl. Optics, 28, 4735–4738, 1989. Kasten, F.: A new table and approximation formula for relative air mass, Arch. Meteor. Geophysics. Bioklimatol. Ser. B, 14, 206–223, 1966. Komhyr II, D., Grass, K. D., and Leonard, R. K.: Jonson Spectrophotometer 83: a Standard for total ozone measurements, 1962–1987, J.Geophys. Res., 94, 9847–9861, 1989. Meeus, J.: Astronomical Algorithms, Willmann-Bell, 102 pp., 1991. Michalsky, J.: The astronomical almanac's algorithm for approximate solar position (1950–2030), Solar Energy, 40, 227–235, 1998. Shaw, G. E.: Sun photometry, B. Am. Meteorol. Soc., 64, 4–10, 1983 Smirnov, A., Holben, B. N., Lyapustin, A., Slutsker, I., and Eck, T. F.: AERONET processing algorithms refinement, AERONET Workshop, May 10–14, 2004, El Arenosillo, Spain. Spencer, J. W.: Fourier series representation of the position of the sun, Search, 2, p 172, 1971. Tomasi, C., Vitale, V., Lupi, A., et al.: Aerosols in polar regions: A historical overview based on optical depth and in situ observations, J. Geophys. Res., 112, D16205, doi:10.1029/2007JD008432, 2007.