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Proceedings Paper

Dynamical characteristics of atmospheric layers over complex terrain probed by two-wavelength lidar
Author(s): Zahary Y. Peshev; Tanja N. Dreischuh; Atanaska D. Deleva; Dimitar V. Stoyanov
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Paper Abstract

Time-resolved measurements of the distribution and dynamics of aerosols in atmospheric layers over complex terrains differing in their orographic characteristics, performed at two or more wavelengths, offer an opportunity for revealing peculiarities and evolution of different aerosol fractions, in view of their importance for local climate, air circulations, rainfalls, ecology, etc. In this work, an investigation of dynamical characteristics of the atmospheric aerosol over adjacent city-, plain-, and mountain zone is reported. Measurements are carried out at two wavelengths (1064 nm and 532 nm) by using two channels of an aerosol lidar based on a powerful Nd:YAG laser. Representative results of lidar measurements over the zone of investigation are described, obtained during a winter day. Range profiles of the atmospheric backscattering coefficient, range-corrected lidar signal, normalized standard deviation, and backscattering-related Angstrom exponent are presented and analysed, as averaged over the time and/or range of measurements, as well as in their temporal evolution. Taking advantage of the two-wavelength lidar sounding, statistical quasi-quantitative analysis of the spatial density distribution and temporal dynamics of both the fine-mode and coarse-mode aerosol fractions is accomplished in orographic aspect. Domains of most intensive dynamics are determined for the two aerosol fractions. Obtained results show the strong impact of the heterogenic orography on the atmospheric dynamics, as well as the ability of the utilised lidar system for investigating the distribution and dynamics of aerosol fractions over large areas with high spatial and temporal resolution.

Paper Details

Date Published: 17 January 2011
PDF: 10 pages
Proc. SPIE 7747, 16th International School on Quantum Electronics: Laser Physics and Applications, 77470U (17 January 2011); doi: 10.1117/12.886005
Show Author Affiliations
Zahary Y. Peshev, Institute of Electronics (Bulgaria)
Tanja N. Dreischuh, Institute of Electronics (Bulgaria)
Atanaska D. Deleva, Institute of Electronics (Bulgaria)
Dimitar V. Stoyanov, Institute of Electronics (Bulgaria)

Published in SPIE Proceedings Vol. 7747:
16th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Dimitar Slavov, Editor(s)

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