Indexed on: 14 Nov '13Published on: 14 Nov '13Published in: Atmospheric and Oceanic Optics
Lidar observations in Tomsk in January, 2010, recorded pronounced peaks of aerosol scattering in the stratosphere at heights from 14 to 24 km. Back trajectory calculations of air mass transport to Tomsk showed that enhanced aerosol scattering was directly associated with the cooling of air masses 6–12 h before their occurrence over Tomsk below temperature thresholds for polar stratospheric cloud formation. The back trajectory calculations showed that the polar stratospheric clouds recorded in Tomsk at heights of 16–24 km could have been formed over the Scandinavian mountains, and clouds at heights of 11–14 km could have been formed over the mountain ridges of the Polar Ural Mountains and Novaya Zemlya Archipelago. The presence of synoptic-scale stratospheric aerosol in these regions in January, 2010, was confirmed by data from the CALIOP satellite lidar.