Troposphere aerosol layers: homogeneity in the altitude distribution of the aerosol optical and microphysical characteristics
S.V. Samoilova, Yu.S. Balin, G.P. Kokhanenko, I.E. Penner
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: тропосферный аэрозоль, микрофизика, лидары, адвекция воздушных масс, tropospheric aerosol, microphysics, lidars, air mass advection
Abstract
Correlation between the vertical distribution of tropospheric aerosol and the direction of air mass transfer at different heights is studied on the basis of regular lidar observations in Tomsk (56°N, 85°E). Joint interpretation of the data of 110 sessions of lidar measurements and simulation of 10-day back trajectories of air mass (AM) movement has shown that in 72% of observation the advection direction changes in height no more than once, and it occurs at the boundary of the main scattering layers - the boundary layer and the free troposphere. The direction changes more than once at movement of AM into the free troposphere in spring and summer (11% of observations). It seems impossible to determine the prevalent direction of transfer in the remaining 17% of observations. The change of all lidar characteristics when passing from one layer to another is observed in practically all nighttime sessions of measurements.
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