Ceilometer observation of Saharan dust over mountain valley of Sofia, Bulgaria

Nikolay Kolev; Tsvetina Evgenieva; Ivan Grigorov; Atanaska Deleva; Danko Ivanov; Ventsislav Danchovski; Plamen Savov; Doyno Petkov

doi:10.1117/12.2086082

8 January 2015 Ceilometer observation of Saharan dust over mountain valley of Sofia, Bulgaria

Nikolay Kolev, Tsvetina Evgenieva, Ivan Grigorov, Atanaska Deleva, Danko Ivanov, Ventsislav Danchovski, Plamen Savov, Doyno Petkov

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Proceedings Volume 9447, 18th International School on Quantum Electronics: Laser Physics and Applications; 94470Q (2015) https://doi.org/10.1117/12.2086082
Event: Eighteenth International School on Quantum Electronics: Laser Physics and Applications, 2014, Sozopol, Bulgaria

Abstract

Atmospheric aerosol is known to considerably influence the Earth’s radiative budget and to make an impact on air quality. The influence of aerosols strongly depends on their spatial distribution and optical properties. The aerosol has natural and anthropogenic origin. Aerosol types can be also classified according to their size, sources or geographical origin (desert, continental, marine etc.). Mineral dust is one of the natural aerosols presented in the atmosphere. Its main source is the Sahara desert region. Saharan aerosol layers are frequently observed in Europe by means of active and passive remote sensing devices, especially in the frame of EARLINET and ACTRIS ^{3, 5, 6, 7, 8, 9}. In this paper, observations of vertical distribution of aerosols and assessment of their optical properties will be presented. Two-year (2013-2014) complex measurements were carried out by a ceilometer CHM-15k (Jenoptic) and two lidars in an urban area located in a mountain valley (Sofia, Bulgaria)¹. The ceilometer works 24 hours in automatic mode. Part of the results is compared with results obtained by lidars operating in photon counting modes for specific periods of simultaneous work⁵. Supplementary data from: two meteorological stations; HYSPLIT back trajectory model4; BSCDREAM8b dust model9; and the database of atmospheric radio sounding profiles from Department of Atmospheric Engineering of Wyoming University (USA) are also used in the analysis of the obtained results.

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Nikolay Kolev, Tsvetina Evgenieva, Ivan Grigorov, Atanaska Deleva, Danko Ivanov, Ventsislav Danchovski, Plamen Savov, and Doyno Petkov "Ceilometer observation of Saharan dust over mountain valley of Sofia, Bulgaria", Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 94470Q (8 January 2015); https://doi.org/10.1117/12.2086082

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KEYWORDS

Atmospheric modeling

Aerosols

Data modeling

LIDAR

Atmospheric particles

Atmospheric optics

Climatology

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