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Urban emission hot spots as sources for remote aerosol deposition

Kunkel, Daniel and Lawrence, Mark G. and Tost, Holger and Kerkweg, Astrid and Jöckel, Patrick and Borrmann, Stephan (2012) Urban emission hot spots as sources for remote aerosol deposition. Geophysical Research Letters, 39 (L01808), pp. 1-6. DOI: 10.1029/2011GL049634.

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Official URL: http://www.agu.org/pubs/crossref/2012/2011GL049634.shtml


Large point sources such as major population centers (MPCs) emit pollutants which can be deposited nearby or transported over long distances before deposition. We have used tracer simulations of aerosols emitted from MPCs worldwide to assess the fractions which are deposited at various distances away from their source location. Considering only source location, prevailing meteorology, and the aerosol size and solubility, we show that fine aerosol particles have a high potential to pollute remote regions. About half of the emitted mass of aerosol tracers with an ambient diameter ≤1.0 μm is typically deposited in regions more than 1000 km away from the source. Furthermore, using the Köppen-Geiger climate classification to categorize the sources into various climate classes we find substantial differences in the deposition potential between these classes. Tracers originating in arid regions show the largest remote deposition potentials, with values more than doubled compared to the smallest potentials from tracers in tropical regions. Seasonal changes in atmospheric conditions lead to variations in the remote deposition potentials. On average the remote deposition potentials in summer correspond to about 70–80% of the values in winter, with a large spread among the climate classes. For tracers from tropical regions the summer remote deposition values are only about 31% of the winter values, while they are about 95% for tracers from arid regions.

Document Type:Article
Title:Urban emission hot spots as sources for remote aerosol deposition
AuthorsInstitution or Email of Authors
Kunkel, DanielMPI, Mainz
Lawrence, Mark G.MPI, Mainz
Tost, HolgerJohannes-Gutenberg Univ., Mainz
Kerkweg, AstridJohannes-Gutenberg Univ., Mainz
Jöckel, PatrickPatrick.Joeckel@dlr.de
Borrmann, StephanMPI, Mainz
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-6
Keywords:aerosol, megacities, urban hot-spots, aerosol deposition, aerosol transport, atmospheric chemistry modelling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Patrick Jöckel
Deposited On:30 Jan 2012 12:26
Last Modified:26 Mar 2013 13:36

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