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Lidar, ceilometer and sun photometer investigation of the aerosol optical characteristics in the troposphere over Sofia, Bulgaria
Institute of Electronics, Bulgarian Academy of Sciences.
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
Institute of Electronics, Bulgarian Academy of Sciences.
Department of Meteorology and Geophysics, Faculty of Physics, St. Kliment Ohridski Sofia University.
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2010 (English)In: Comptes Rendus de l'Academie Bulgare des Sciences / Proceedings of the Bulgarian Academy of Sciences, ISSN 1310-1331, E-ISSN 2367-5535, Vol. 63, no 8, p. 1191-1200Article in journal (Refereed) Published
Abstract [en]

The paper presents the results from planetary boundary layer (PBL) height and aerosol optical depth (AOD) measurements carried out in two different experimental sites in Sofia as well as from three-point measurements of aerosol number concentration.

The main aim of the present investigation is to determine optical and microphysical characteristics of the atmospheric aerosol in three points of the valley and their variation during the PBL formation over urban area, park zone and mountain site. Four instruments (lidar, ceilometer, aerosol particle counter and sun photometer) were used in this study.

The experimental AOD data obtained at lambda = 500nm gave values in the range from 0.22 to 0.41 in case of cloud-free skies and up to around 0.8 under partly cloudy conditions. Aerosol particle counter data on aerosol-particle concentration variations in the size range 0.3-1 mu m provided supportive information on the evolution of the valley-mountain aerosol in time and height during the mixing layer development. Joint interpretation of sun photometer, aerosol lidar and ceilometer CHM 15k data allow the influence of the main part of the atmospheric aerosol in the planetary boundary layer to be accounted as well as the significant influence of aerosol layers and high clouds on AOD values.

Place, publisher, year, edition, pages
2010. Vol. 63, no 8, p. 1191-1200
National Category
Other Environmental Engineering Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
URN: urn:nbn:se:lnu:diva-9018OAI: oai:DiVA.org:lnu-9018DiVA, id: diva2:357717
Available from: 2010-10-19 Created: 2010-10-19 Last updated: 2017-12-12Bibliographically approved

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Wiman, Bo L. B.

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