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The lidar measurements (Tomsk: 56.5∘N; 85.0∘E) of the optical characteristics of the stratospheric aerosol layer (SAL) in the volcanic activity period 2006–2011 are summarized and analyzed. The background SAL state with minimum aerosol content, observed since 1997 under the conditions of long-term volcanically quiet period, was interrupted in October 2006 by series of explosive eruptions of volcanoes of Pacific Ring of Fire: Rabaul (October 2006, New Guinea); Okmok and Kasatochi (July-August 2008, Aleutian Islands); Redoubt (March-April 2009, Alaska); Sarychev Peak (June 2009, Kuril Islands); Grimsvötn (May 2011, Iceland). A short-term and minor disturbance of the lower stratosphere was also observed in April 2010 after eruption of the Icelandic volcano Eyjafjallajokull. The developed regional empirical model of the vertical distribution of background SAL optical characteristics was used to identify the periods of elevated stratospheric aerosol content after each of the volcanic eruptions. Trends of variations in the total ozone content are also considered

international journal of optics

Lidar Observations of Aerosol Disturbances of the Stratosphere over Tomsk (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mn>56.5</mml:mn><mml:mo>∘</mml:mo></mml:msup></mml:math>N;<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mn>85.0</mml:mn><mml:mo>∘</mml:mo></mml:msup></mml:math>E) in Volcanic Activity Period 2006–2011

Lidar Observations of Aerosol Disturbances of the Stratosphere over Tomsk (56.5∘N;85.0∘E) in Volcanic Activity Period 2006–2011