LONG-TERM MEASUREMENTS OF CHARACTERISTICS OF STRATOSPHERIC AEROSOL LAYER AT SIBERIAN LIDAR STATION IN TOMSK

摘要

In the report, we analyze the data of lidar measurements of optical characteristics of aerosol in the stratosphere over Tomsk; the analysis revealed the periods of elevated aerosol content after a series of explosive eruptions of volcanoes of the Pacific "Ring of Fire" and Iceland in 2006-2011. For these relatively weak eruptions (which injected to the stratosphere no more than 2 Mt of sulfur dioxide, serving the source for the sulfur acid aerosol formation), the periods of elevated aerosol content had been from a few months to half-year. Since 2012, a background state of aerosol loading had been established in the stratosphere over Tomsk. The regional empirical model of background stratospheric aerosol, developed by us for 2000-2008, was corrected to include data of measurements from 2012 to 2016.