This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/3783 in citations.
Zur Klimatologie von Stickoxiden, Ozon und Kohlenmonoxid in der Troposphäre: eine Analyse des MOZAIC-Datensatzes
Zur Klimatologie von Stickoxiden, Ozon und Kohlenmonoxid in der Troposphäre: eine Analyse des MOZAIC-Datensatzes
Tropospheric ozone is an effective greenhouse gas in the tropopause region. Near the surface it is toxic for humans and the ecosystem. It is produced by precursors nitrogen oxides, carbon monoxide, and hydrocarbons, so called volatile organic compounds. Stratospheric ozone protects the earth surface...
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Personal Name(s): | Petzold, Katja (Corresponding author) |
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Contributing Institute: |
Troposphäre; ICG-2 |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2010
|
Physical Description: |
VIII, 185 p. |
Dissertation Note: |
Aachen, RWTH, Diss., 2010 |
Document Type: |
Dissertation / PhD Thesis |
Research Program: |
Atmosphäre und Klima |
Series Title: |
Berichte des Forschungszentrums Jülich
4327 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Tropospheric ozone is an effective greenhouse gas in the tropopause region. Near the surface it is toxic for humans and the ecosystem. It is produced by precursors nitrogen oxides, carbon monoxide, and hydrocarbons, so called volatile organic compounds. Stratospheric ozone protects the earth surface from shortwave radiation and is built by photolysis of oxygen. Within the scope of the EU-funded Project MOZAIC (Measurement of ozone, water vapor, carbon monoxide, and nitrogen oxides by Airbus in-service aircraft)measurements made since 1994 aboard five A-340 long range aircraft on scheduled flights around the globe provide useful information on air quality in the environment of many cities. With the work at hand the trace gas concentrations of ozone, nitrogen oxides, and carbon monoxide are analysed from a geographical point of view. An introduction to the emission patterns of the relevant trace gases, tropospheric ozone chemistry, and the atmospheric circulation as well as an overview of the MOZAIC project is followed by a regard of the upper troposphere first. Some regions in the tropopause region are highlighted by higher Ozone and nitrogen oxides than others. Carbon monoxide shows a minor spatial variability and is well mixed. As a potential source of nitrogen oxides and carbon monoxide three case studies are examined on the influence of lightning and convection. A strong correlation is found for nitrogen oxides and carbon monoxide in case of convection which shows evidence of boundary layer sources for both trace gases. Nitrogen oxides only are enhanced in case of intense lightning. The correlation with carbon monoxide is weak. The findings point to a strong influence of the synoptic situation on trace gas concentrations in the upper troposphere. High concentrations of ozone and nitrogen oxides occur over eastern North America and eastern Asia as well as over the Arabian peninsular. These regions belong to characteristic climate zones. Therefore the relevant MOZAIC airports are grouped to the climate zones developed by Koeppen and recently revised by Kottek et al. (2006). Vertical profiles of ozone show similarities in between the climes. The extratropical midlatitudes show differences between the eastern and western parts of the continents. Low ozone concentrations in summer 10 - 12 km altitude indicate a higher tropopause in the eastern parts with higher temperatures in summer. A further look is taken on seasonal wind roses for surface and free troposphere. There is evidence that the concentrations of ozone and carbon monoxide in the vicinity of the chosen airports is determined by wind direction. High carbon monoxide burden comes along with lower ozone concentrations. Further the annual cycles of the different trace gases are examined at several altitude levels. The water vapour mixing ratio reveals the wet and dry seasons in the tropics as well as the difference between western and eastern parts of the continent. The latter shows higher concentrations and a [...] |