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| Titel |
Technical Note: In-situ quantification of aerosol sources and sinks over regional geographical scales |
| VerfasserIn |
G. Buzorius |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 14 ; Nr. 9, no. 14 (2009-07-22), S.4869-4878 |
| Datensatznummer |
250007520
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| Publikation (Nr.) |
 copernicus.org/acp-9-4869-2009.pdf |
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| Zusammenfassung |
| In order to obtain the source/sink functions for atmospheric particulates
located on the planetary surface or elevated in the atmosphere; direct
aerosol emission measurements are required. For this purpose, the
performance of an airborne aerosol flux measurement system with an improved
3-kilometer (km) spatial resolution is evaluated in this study. Eddy
covariance method was used in flux calculations. A footprint for airborne
flux sampling with the increased resolution becomes comparable in area to
the footprint for tower sampling (with the footprint length being 2 to 10 km). The improvement in spatial resolution allows the quantification of
emission rates from individual sources located several kilometers apart such
as highway segments, city blocks, and remote and industrial areas. The
advantage is a moving platform that allows scanning of aerosol emissions or
depositions over regional geographic scales. Airborne flux measurements with
the improved spatial resolution were conducted in various environments
ranging from clean to partly polluted marine to polluted continental
environment with low (<500 m) mixed boundary layer heights. The upward
and downward fluxes from the clean marine environment were smaller than
0.5×106 particles m−2 s−1 in absolute value. The effective
emissions measured from a ship plume ranged from 2×108 to
3×108 m−2 s−1, and effective fluxes measured crossing cities plumes with
populations of 10 000 to 12 000 inhabitants were in the range of 2×108
to 3×108 m−2 s−1. Correlations between heat and aerosol fluxes
are evaluated. |
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