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| Titel |
Black carbon measurements in the boundary layer over western and northern Europe |
| VerfasserIn |
G. R. McMeeking, T. Hamburger, D. Liu, M. Flynn, W. T. Morgan, M. Northway, E. J. Highwood, R. Krejci, J. D. Allan, A. Minikin, H. Coe |
| 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 ; 10, no. 19 ; Nr. 10, no. 19 (2010-10-06), S.9393-9414 |
| Datensatznummer |
250008808
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| Publikation (Nr.) |
 copernicus.org/acp-10-9393-2010.pdf |
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| Zusammenfassung |
| Europe is a densely populated region that is a significant global source of
black carbon (BC) aerosol, but there is a lack of information regarding the
physical properties and spatial/vertical distribution of rBC in the region.
We present the first aircraft observations of sub-micron refractory BC (rBC)
aerosol concentrations and physical properties measured by a single particle
soot photometer (SP2) in the lower troposphere over Europe. The observations
spanned a region roughly bounded by 50° to 60° N and from
15° W to 30° E. The measurements, made between April and
September 2008, showed that average rBC mass concentrations ranged from about
300 ng m−3 near urban areas to approximately 50 ng m−3 in remote
continental regions, lower than previous surface-based measurements. rBC
represented between 0.5 and 3% of the sub-micron aerosol mass. Black carbon
mass size distributions were log-normally distributed and peaked at
approximately 180 nm, but shifted to smaller diameters (~160 nm) near
source regions. rBC was correlated with carbon monoxide (CO) but had
different ratios to CO depending on location and air mass. Light absorption
coefficients were measured by particle soot absorption photometers on two
separate aircraft and showed similar geographic patterns to rBC mass measured
by the SP2. We summarize the rBC and light absorption measurements as a
function of longitude and air mass age and also provide profiles of rBC mass
concentrations and size distribution statistics. Our results will help
evaluate model-predicted regional rBC concentrations and properties and
determine regional and global climate impacts from rBC due to atmospheric
heating and surface dimming. |
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