Tingyao He (Author), Yingying Chen (Author), Samo Stanič (Author), Klemen Bergant (Author), Fei Gao (Author), Dengxin Hua (Author)

Abstract

From August to October 2010 lidar measurements of aerosols in the troposphere were performed at Otlica observatory, Slovenia, using a vertical scanning elastic lidar. The lidar data sample, which contains 38 nighttime vertical profiles of the mean aerosol extinction, was combined with continuous ozone concen- tration (O3), particulate matter concentrations (PM) and daily radiosonde data. The obtained radiosonde- and lidar-derived heights of the atmospheric boundary layer (ABL), which varied considerably from day to day, were found to be in good agreement. The mean values of the aerosol optical depth (AOD) at 355 nm, were calculated separately for the ABL and for the free troposphere (FT). A ten-fold increase of the FT AOD was observed during the days with predicted presence of Saharan dust above the lidar site. To correlate AOD values with the type and origin of aerosols, backward trajectories of air-masses above Otlica were modeled using the HYSPLIT model and clustered. High ABL AOD values were found to be correlated with local circulations and slowly approaching air masses from the Balkans and low values with northwestern flows. The highest values correlated with southwestern flows originating in northern Africa.

Keywords

aerosol;optical depth;lidar;atmospheric boundary layer;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 53
COBISS: 5330939 Link will open in a new window
ISSN: 0022-4073
Views: 3043
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 380-387
Issue: ǂVol. ǂ217
Chronology: Sep. 2018
DOI: 10.1016/j.jqsrt.2018.06.009
ID: 11028284