On results of studies of atmospheric aerosol optical depth in Arctic regions
S.M. Sakerin1, S.Yu. Andreev1, D.M. Kabanov1, S.V. Nikolashkin2, A.N. Prakhov3, V.F. Radionov3, Yu.S. Turchinovich1, D.G. Chernov1, B.N. Holben4, A. Smirnov4, M.G. Sorokin4
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy of the Siberian Branch of the RAS, 677980, Yakutsk, 31, Lenina ave
3Federal State Budgetary Institution "Arctic and Antarctic Research Institute", 38 Bering str., St.Petersburg, Russia, 199397
4NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA
Keywords: Arctic, aerosol optical depth, annual behavior, spatial distribution
Abstract
We discuss characteristics of the spectral aerosol optical depth (AOD) of the atmosphere, measured using sun photometers in high-latitude regions (Spitsbergen, Tiksi, Yakutsk). The seasonal variations are characterized by a decrease in AOD from spring to fall by approximately two times in Yakutia and 1.5 times in the region of Spitsbergen. It is shown that the high selectivity of the spectral AOD dependence in warm period (with Angstrom parameters varying from 1.3 to 1.8) was caused by low content of coarse aerosol. Based on long-term that satellite observations systematically overestimate AOD over Arctic seas.
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