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| Titel |
A case study of aerosol scavenging in a biomass burning plume over eastern Canada during the 2011 BORTAS field experiment |
| VerfasserIn |
J. E. Franklin, J. R. Drummond, D. Griffin, J. R. Pierce, D. L. Waugh, P. I. Palmer, M. Parrington, J. D. Lee, A. C. Lewis, A. R. Rickard, J. W. Taylor, J. D. Allan, H. Coe, K. A. Walker, L. Chisholm, T. J. Duck, J. T. Hopper, Y. Blanchard, M. D. Gibson, K. R. Curry, K. M. Sakamoto, G. Lesins, L. Dan, J. Kliever, A. Saha |
| 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 ; 14, no. 16 ; Nr. 14, no. 16 (2014-08-21), S.8449-8460 |
| Datensatznummer |
250118965
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| Publikation (Nr.) |
 copernicus.org/acp-14-8449-2014.pdf |
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| Zusammenfassung |
We present measurements of a long-range smoke transport event
recorded on 20–21 July 2011 over Halifax, Nova Scotia, Canada,
during the Quantifying the impact of BOReal forest fires on
Tropospheric oxidants over the Atlantic using Aircraft and
Satellites (BORTAS-B) campaign. Ground-based Fourier transform
spectrometers and photometers detected air masses associated with
large wildland fires burning in eastern Manitoba and western
Ontario.
We investigate a plume with high trace gas amounts but low amounts
of particles that preceded and overlapped at the Halifax site with
a second plume with high trace gas loadings and significant amounts
of particulate material. We show that the first plume experienced
a meteorological scavenging event, but the second plume had not been
similarly scavenged. This points to the necessity to account
carefully for the plume history when considering long-range
transport since simultaneous or near-simultaneous times of arrival
are not necessarily indicative of either similar trajectories or
meteorological history. We investigate the origin of the scavenged
plume, and the possibility of an aerosol wet deposition event
occurring in the plume ~ 24 h prior to the measurements over
Halifax. The region of lofting and scavenging is only monitored on
an intermittent basis by the present observing network, and thus we
must consider many different pieces of evidence in an effort to
understand the early dynamics of the plume. Through this discussion
we also demonstrate the value of having many simultaneous
remote-sensing measurements in order to understand the physical and
chemical behaviour of biomass burning plumes. |
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