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  Pollution patterns in the upper troposphere over Europe and Asia observed by CARIBIC

Baker, A. K., Traud, S., Brenninkmeijer, C. A. M., Hoor, P., Neumaier, M., Oram, D. E., et al. (2014). Pollution patterns in the upper troposphere over Europe and Asia observed by CARIBIC. Atmospheric Environment, 96, 245-256. doi:10.1016/j.atmosenv.2014.06.010.

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 Creators:
Baker, Angela K.1, Author              
Traud, Sebastian2, Author
Brenninkmeijer, Carl A. M.1, Author              
Hoor, Peter2, Author
Neumaier, Marco2, Author
Oram, David E.2, Author
Rauthe-Schöch, Armin1, Author              
Sprung, Detlev2, Author
Schloegl, Sebastian2, Author
Slemr, Franz1, Author              
van Velthoven, Peter F. J.2, Author
Wernli, Heini2, Author
Zahn, Andreas2, Author
Ziereis, Helmut2, Author
Affiliations:
1Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              
2external, ou_persistent22              

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 Abstract: Between May 2005 and March 2008 the CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) observatory was deployed to make atmospheric observations on 42 flights between Frankfurt, Germany and Manila, the Philippines. This nearly 3 year flight series provides information about atmospheric composition in the upper troposphere over Europe and Asia during all seasons and was used to investigate seasonal and regional differences in trace gas distributions and the influence of long range transport and local convection on composition. The flight route was separated into three different regions having characteristic differences in transport and composition; these were Europe and Western Asia (5 degrees E-60 degrees E), Central Asia (60 degrees E-100 degrees E) and Southeast Asia (100 degrees E-125 degrees E). The region over Europe and Western Asia was strongly influenced by air masses from North America, while the region over Southeast Asia was mostly influenced by local emissions, particularly from biomass/biofuel burning as indicated by high levels of acetonitrile and carbon monoxide. Air masses over Central Asia were found to be influenced by both recent convection from the Indian subcontinent and mid-range transport from Europe, Western Asia and the Middle East. Elevated levels of propane and other non-methane hydrocarbons, both with and without concomitant elevations in other trace gases (i.e. carbon monoxide, acetonitrile) was a persistent feature over Central Asia in all seasons except summer, and were particularly prominent in fall. Influences on composition over Central Asia were investigated in detail for a case study from a series of flights in October 2006, where elevated levels of pollutants were found to be the result of convective transport of both biomass/biofuel burning and urban emissions from South Asia and fossil fuel related emissions from Eastern Europe. (C) 2014 Elsevier Ltd. All rights reserved.

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 Dates: 2014-10
 Publication Status: Published in print
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Title: Atmospheric Environment
Source Genre: Journal
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Publ. Info: Oxford [England] : Pergamon
Pages: - Volume / Issue: 96 Sequence Number: - Start / End Page: 245 - 256 Identifier: ISSN: 1352-2310
CoNE: https://pure.mpg.de/cone/journals/resource/958480288336