VARIATIONS OF MICROPHYSICAL AND OPTICAL CHARACTERISTICS OF ATMOSPHERIC AEROSOL IN TRANSITION ZONE 'LAND-OCEAN' BASED ON DATA OF LIDAR SENSING

摘要

Given the results of variations in the microphysical and optical characteristics of atmospheric aerosol in the transitionzone "land-ocean" in the Far Easten region, Primorsky Kray, Vladivostok. The data of measurements for the period from21.02.2016 to 08.12.2017 are analyzed. In the winter, no measurements were taken. The values of the height of theplanetary boundary layer (PBL) characteristic for the region were obtained. The average value of the height of PBL for2016 was (2605±532) m, for 2017 – (2501±435) m. Seasonal changes in the height of PBL were considered and aninsignificant decrease in the height of the PBL in the spring and autumn of 2017 compared with the same period in 2016,the difference was about 300 m. The values of the actual and imaginary part of the refractive index of atmosphericaerosol were obtained in the period from 2016 to 2017. The predominance of an aerosol with a small value (about 1.31-1.36) of the actual part of the refractive index for 2016 compared with 2017 is noted. There are particles of large volumes(～ 17 mkm~3) for altitudes up to 1 km in 2016, compared to 2017 (～ 11 mkm~3). The values of the atmosphere opticaldepth for an altitude of up to 3 km for wavelengths of 355 nm and 532 nm are calculated. It is established that themaximum optical depth acquires in the spring period and reaches to 1.15 for a wavelength of 355 nm and to 0.51 for awavelength of 532 nm.