Anomalous vertical distribution of stratospheric aerosol layer over Tomsk in December 2017 - January 2018

In the report, we present certain results of studying the vertical distribution of stratospheric aerosol layer (SAL), obtained at the Siberian Lidar Station, Tomsk in December 2017 – January 2018. A block-diagram of lidar is presented. It is shown the aerosol loading of the stratosphere might be due to the occurrence of polar stratospheric clouds (PSC) as a result of transport of Arctic air masses to Tomsk.