Wavelength dependence of the optical depth of multicomponent aerosols in the North of Chile
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Rivas, M, E Rojas, Jay Herman, O. Torres, T. F. Eck, and B. N. Holben. 2000. “Wavelength dependence of the optical depth of multicomponent aerosols in the North of Chile" Paper presented at PROCEEDINGS OF THE SPARC 2000 2nd GENERAL ASSEMBLY OF THE SPARC/WCRP PROJECT ,Mar Del Plata, Argentina - November 6-10, 2000. https://www.atmosp.physics.utoronto.ca/SPARC/SPARC2000_new/PosterSess1/SessionP1_4/Rivas/Rivas_Abst.html.
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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In this work, we present the first results of measurements of UV- multi-component aerosols made by an automatic CIMEL Sunphotomer installed by NASA in Agreement with University of Tarapacá Arica? Chile. We analyze spectral measurement of t from 340-1020 nm obtained from a ground based Aerosol Robotic Network radiometers AERONET, which is located in Arica (Lat.:18° 29´S, Long.: 70° 19´ W, 25m). Desert dust aerosols are present, at this location due to the proximity of the Atacama desert (the world´s driest), and fine mode aerosols are also present. Aerosol size distribution retrieval analysis are also presented. The data show that in some days there is curvature in the ln t vs ln l plot, which is related to the dominance of the accumulation mode aerosols. In this case a second order polynomial fit to the ln τ vs ln λ provided in Arica provides a good agreement with the measurements. Satellite TOMS estimates of optical depth for this region were also obtained.