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| Titel |
Investigation of CO, C2H6 and aerosols in a boreal fire plume over eastern Canada during BORTAS 2011 using ground- and satellite-based observations and model simulations |
| VerfasserIn |
D. Griffin, K. A. Walker, J. E. Franklin, M. Parrington, C. Whaley, J. Hopper, J. R. Drummond, P. I. Palmer, K. Strong, T. J. Duck, I. Abboud, P. F. Bernath, C. Clerbaux, P.-F. Coheur, K. R. Curry, L. Dan, E. Hyer, J. Kliever, G. Lesins, M. Maurice, A. Saha, K. Tereszchuk, D. Weaver |
| 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 ; 13, no. 20 ; Nr. 13, no. 20 (2013-10-18), S.10227-10241 |
| Datensatznummer |
250085759
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| Publikation (Nr.) |
 copernicus.org/acp-13-10227-2013.pdf |
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| Zusammenfassung |
| We present the results of total column measurements of CO,
C2H6 and fine-mode aerosol optical depth (AOD) during the
"Quantifying the impact of BOReal forest fires on
Tropospheric oxidants over the Atlantic using
Aircraft and Satellites" (BORTAS-B) campaign
over eastern Canada. Ground-based observations, using Fourier
transform spectrometers (FTSs) and sun photometers, were carried out
in July and August 2011. These measurements were taken in Halifax,
Nova Scotia, which is an ideal location to monitor the outflow of
boreal fires from North America, and also in Toronto,
Ontario. Measurements of fine-mode AOD enhancements were highly
correlated with enhancements in coincident trace gas (CO and
C2H6) observations between 19 and 21 July 2011, which is
typical for a smoke plume event. In this paper, we focus on the
identification of the origin and the transport of this smoke plume. We
use back trajectories calculated by the Canadian Meteorological Centre
as well as FLEXPART forward trajectories to demonstrate that the
enhanced CO, C2H6 and fine-mode AOD seen near Halifax and
Toronto originated from forest fires in northwestern Ontario that
occurred between 17 and 19 July 2011. In addition, total column
measurements of CO from the satellite-borne Infrared Atmospheric
Sounding Interferometer (IASI) have been used to trace the smoke plume
and to confirm the origin of the CO enhancement. Furthermore, the enhancement
ratio – that is, in this case equivalent to the emission ratio
(ERC2H6/CO) – was estimated from these ground-based observations.
These
C2H6 emission results from boreal fires in northwestern
Ontario agree well with C2H6 emission measurements from other
boreal regions, and are relatively high compared to fires from other
geographical regions. The ground-based CO and C2H6
observations were compared with outputs from the 3-D global chemical
transport model GEOS-Chem, using the Fire Locating And Modeling of
Burning Emissions (FLAMBE) inventory. Agreement within the stated
measurement uncertainty (~3% for CO and ~8% for C2H6)
was found for the magnitude of the enhancement
of the CO and C2H6 total columns between the measured and modelled results.
However,
there is a small shift in time (of approximately 6 h) of
arrival of the plume over Halifax between the results. |
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