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Atmosphärische gasförmige Vorläufer von Aerosol und Ozon: Messungen mit CIMS-Methoden auf einem Flugzeug und am Boden

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Aufmhoff,  Heinfried
Frank Arnold - Atmospheric Trace Gases and Ions, Research Groups, MPI for Nuclear Physics, Max Planck Society;

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2004-016.pdf.pdf
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Citation

Aufmhoff, H. (2004). Atmosphärische gasförmige Vorläufer von Aerosol und Ozon: Messungen mit CIMS-Methoden auf einem Flugzeug und am Boden. PhD Thesis, Dissertation, Ruprecht-Karls-Universität, Heidelberg.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-8AE3-C
Abstract
This dissertation is concerned with measurements of gaseous atmospheric trace constituents having an influence on the formation of ozone and aerosol particles. Aircraft and ground based measurements with two different types of mass spectrometers have been performed at altitudes of 0-12 km. These (ultra-)CIMS (= Chemical Ionization Mass Spectrometry) measurements included particularly the trace gas species SO2, H2SO4, (CH3)2CO (acetone) and CH3OH (methanol). Calibrations and calculations of wall losses and interference by water vapor in the sampling line were performed. More details of the height variation of SO2, a precursor of gaseous sulfuric acid, have been discovered. Evidence has been obtained for the ubiquitous atmospheric presence of acetone and methanol, which are important HOx(=OH,HO2) and ozone precursor gases in the upper troposphere and lowermost stratosphere. Even intercontinental transport of acetone has been observed. Gaseous sulfuric acid was found to have a diurnal variation in the planetary boundary layer, with a maximum at noon occasionally allowing the formation of new particles via bi-molecular homogeneous nucleation.