Aerosol optical properties in Northern Norway and Svalbard
Y.-C. Chen1, B. Hamre1, Ø. Frette1, S. Blindheim2, K. Stebel3, P. Sobolewski4, C. Toledano5, and J. J. Stamnes11Department of Physics and Technology, University of Bergen, P.O. Box 7803, 5020 Bergen, Norway 2Arctic Lidar Observatory for Middle Atmosphere Research, P.O. Box 54, 8483 Andenes, Norway 3Norwegian Institute for Air Research, P.O. Box 100, 2027 Kjeller, Norway 4Central Geophyscical Observatory at Belsk, Institute of Geophysics PAS, Ksiecia Janusza 64 Street, 01-452 Warsaw, Poland 5Group of Atmospheric Optics, University of Valladolid, Paseo de Belén 7, 47011 – Valladolid, Spain
Received: 31 Oct 2013 – Accepted for review: 22 Nov 2013 – Discussion started: 13 Dec 2013
Abstract. We present comparisons between estimates of the aerosol optical thickness and the Ångström exponent in Northern Norway and Svalbard based on data from AERONET (Aerosol Robotic Network) stations at Andenes (69.28° N, 16.01° E, 379 m altitude) and Hornsund (77.00° N, 15.56° E, 10 m altitude) for the period 2008–2011. The four-year annual mean values for the aerosol optical thickness at 500 nm τ(500) at Andenes and Hornsund both were 0.10. At Hornsund, there was less variation of the monthly mean value of τ(500) than at Andenes. The annual mean values of the Ångström exponent α at Andenes and Hornsund were 1.25 and 1.37, respectively. At Andenes and Hornsund α was found to be larger than 1.1 in 64% and 86% of the observations, respectively, indicating that fine-mode particles were dominating at both sites. Both sites had a similar seasonal variation of the aerosol size distribution although one site is in an arctic area while the other site is in a sub-arctic area.
Chen, Y.-C., Hamre, B., Frette, Ø., Blindheim, S., Stebel, K., Sobolewski, P., Toledano, C., and Stamnes, J. J.: Aerosol optical properties in Northern Norway and Svalbard, Atmos. Meas. Tech. Discuss., 6, 10761-10795, doi:10.5194/amtd-6-10761-2013, 2013.