Universität zu Köln

Kazanas, Konstantinos (2017). Morning Aerosol vertical profiles in the Planetary Boundary Layer: Observations on a Zeppelin NT Airship and comparison with a Regional Model. PhD thesis, Universität zu Köln.

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Abstract

In order to study atmospheric air quality and pollutant exchanges, most field campaigns use ground based observations, which usually probe the surface layer. In the frame work of the PEGASOS project a Zeppelin-NT airship was equipped with measurement instruments for both gas and aerosol phase constituents. For the time periods of the PEGASOS campaigns in 2012: 19/05-27/05 at Cabauw (Netherlands) and 18/06-13/07 at Po-Valley (Italy), a chemical weather forecast system based on the EURAD-IM chemical transport model has been set up, first, to provide online support for the flight planning, and second, to interpret the observations in conjuction with the model results. First, the model results are compared with observations, over the whole campaign period and statistical parameters are calculated in order to evaluate the overall model performance. One measurement day with extensive early morning gas-phase vertical profiles (12/07/2012) is selected for detailed study of the model performance with respect to meteorology and gas-phase composition. It is found that the model performs qualitatively well and agreements between model prediction and observation are overall satisfying. Second, one measurement day with gas-phase and, at the same time, aerosol-phase vertical profiles (06/20/2012) is selected in order to study the model performance concerning aerosols. The regionality of ammonium-nitrate is discussed. For the 06/20/2012, at the location of San Pietro Capofiume, the model indicates a large fraction of sulfate and nitrate as transported. In addition, the local production rates of sulfuric acid and nitric acid cannot be accounted for such a high sulfate concentration over nitrate concentration. The latter two support the hypothesis of a regionally formed and transported ammonium-sulfate and a locally formed ammonium-nitrate.

Item Type:	Thesis (PhD thesis)
Creators:	Creators Email ORCID ORCID Put Code Kazanas, Konstantinos kazanas.kon@gmail.com UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-82942
Date:	27 June 2017
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute for Geophysics and Meteorology
Subjects:	Natural sciences and mathematics Earth sciences
Uncontrolled Keywords:	Keywords Language atmospheric chemistry English aerosols English chemical weather forecast English ammonium-nitrate English Zeppelin NT English PEGASOS project English regional model English
Date of oral exam:	27 June 2017
Referee:	Name Academic Title Wahner, Andreas Prof. Dr. Mentel, Thomas F. PD Dr.
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/8294