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Discussion papers
https://doi.org/10.5194/acp-2018-1155
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-1155
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 17 Dec 2018

Research article | 17 Dec 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Analysis of Sulfate Aerosols over Austria: A Case Study

Camelia Talianu1,2 and Petra Seibert1 Camelia Talianu and Petra Seibert
  • 1Institute of Meteorology, University of Natural Resources and Life Sciences, Vienna, Austria
  • 2National Institute of R&D for Optoelectronics, Magurele, Romania

Abstract. An increase of the sulfate aerosols observed in the period 01–06 Apr 2014 over Austria is analyzed using in situ measurements at an Austrian air quality background station, lidar measurements at the closest EARLINET stations around Austria, CAMS near-real-time data and particle dispersion modelling using FLEXPART, a Lagrangian transport model. In-situ measurement of SO2, PM2.5, PM10 and O3 were performed at the air quality background station Pillersdorf, Austria (EMEP station AT30, 48°43' N, 15°55' E). A CAMS aerosol mixing ratios analysis for Pillersdorf and the lidar stations Leipzig, Munich, Garmisch, Bucharest indicates the presence of an event of aerosol transport, with sulfate and dust as principal components. For the sulfate layers identified at Pillersdorf from the CAMS analysis, backward and forward trajectory analyses were performed, associating lidar stations to the trajectories. The lidar measurements for the period corresponding to trajectory overpass of associated stations were analyzed, obtaining the aerosol layers, the optical properties and the aerosol types. The potential sources of transported aerosols were determined for Pillersdorf and the lidar stations using the source-receptor sensitivity computed with FLEXPART, combined with MACCity source inventory. A comparative analysis for Pillersdorf and the trajectory-associated lidar stations showed consistent aerosol layers, optical properties and types, and potential sources. A complex pattern of contributions to sulfate over Austria was found in this paper. For the lower layers (below 2000 m) of sulfate, it was found that the Central Europe was the main source of sulfate. Medium to smaller contributions come from sources in Eastern Europe, the Northwest Africa and Eastern US. For the middle-altitude layers (between 2000 m and 5000 m), sources from Central Europe (Northern Italy, Serbia, Hungary) contribute with similar emissions. Northwest Africa and Eastern US have also important contributions. For the high-altitude layers (above 5000 m), the main contributions come from Northwest Africa, but sources from Southern and Eastern US contribute also significantly. No contributions from Europe are seen for these layers. The methodology used in this paper can be used as a general tool to correlate measurements at in situ stations and EARLINET lidar stations around these in situ stations.

Camelia Talianu and Petra Seibert
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Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Camelia Talianu and Petra Seibert
Camelia Talianu and Petra Seibert
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Short summary
The episode of elevated sulfate aerosols over Eastern Austria in the period 01–06 April 2014 is analyzed using in-situ measurements, EARLINET lidar measurements, CAMS reanalysis data and backward simulations with the FLEXPART Lagrangian dispersion model. It was found that the lowest layers came from Central Europe, while at higher levels, also sources in NW Africa and the Eastern US contributed. The methodology can be used as a tool to relate in-situ and EARLINET measurements.
The episode of elevated sulfate aerosols over Eastern Austria in the period 01–06 April 2014 is...
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