Department of Earth Sciences, Faculty of Science, University of Toyama, 3190 Gofuku, Toyama-shi, Toyama 930-8555.
National Institute of Polar Research, Research Organization of Information and Systems, Midori-cho 10-3, Tachikawa, Tokyo 190-8518.
National Institute of Polar Research, Research Organization of Information and Systems, Midori-cho 10-3, Tachikawa, Tokyo 190-8518.
Sky radiometer measurement has been continued at Ny-Alesund, Svalbard (78.93N, 11.86E, Alt. 30 m) in the Arctic region, since March 2000. In this study, we present the temporal variation and the relationship of Angstrom parameters (i.e., aerosol optical thickness and Angstrom exponent) at Ny-Alesund. The results of long-term measurements show clear seasonal trends of the aerosol optical thickness at 0.5 μm with maximum in spring and minimum at the end of summer, and of the Angstrom exponent with temporal increase in spring to summer.