Vol. 25, issue 09, article # 7

Abstract:

This paper covers the question of stratosphere-troposphere exchange in 2007–2009 in transitional “ocean – continent” zone by means of lidar measurements of vertical ozone distribution. The simultaneous analysis of vertical ozone distribution, meteo and wind field parameters shows that stratosphere-troposphere exchange over the Vladivostok is caused primarily by tropopause folds, which are formed due to stratospheric air movements from north to south and then into the troposphere southwest from cyclones. In this case, positive trend of ozone concentration and decrease of air humidity in upper troposphere occurs when polar air masses formes polar jet in the vicinity of subtropical jet. Hence, the location of kernels of both jets becomes unstable and breaks down a tropopause inversion layer, that leads to possibility of stratospheric air intrusions into the troposphere in the area of mutual influence of jet streams.

Keywords:

lidar sounding, stratosphere-troposphere exchange, tropopause inversion layer, Brunt–Väisälä frequency