Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia



Advanced Search

Atmospheric and Oceanic Optics

2016 year, number 12

Lidar measurements of stratospheric aerosol parameters over Obninsk in 2012-2015

V.A. Korshunov, D.S. Zubachev
Russian Federal Service on Hydrometeorology and Environmental Monitoring Research and Production Association В«Typhoon», 4, Pobeda str., Obninsk, Kaluga Region, 249038 Russia
Keywords: стратосфера, лидар, аэрозоль, обратное рассеяние, оптическая толщина, Челябинский метеорит, stratosphere, lidar, aerosol, backscattering, optical depth, Chelyabinsk meteorite

Abstract

Lidar polarization measurements of stratospheric (10-40 km) aerosol parameters were fulfilled over Obninsk in 2012-2015. Over 300 altitude profiles of the aerosol backscattering coefficient at 532 nm wavelength were obtained. Parameters of aerosol backscattering measured are generally close to known background values. An increased content of spherical aerosol near tropopause was revealed in spring 2013; it was probably caused by sedimentation of Chelyabinsk meteorite aerosol. Layers of increased aerosol backscattering were observed at 10-15 km levels in July 2014 and July 2015, appeared as a result of transcontinental aerosol transfer from Canadian forest fires. Estimates of integral parameters of backscattering and extinction were made for the lower (from tropopause level to 15 km) and middle (from 15 to 30 km) aerosol layers. It is shown that the contributions of the lower layer in the above optical parameters are 1.8 and 1.6 times higher than those of the middle layer.