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| Titel |
Quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites (BORTAS) experiment: design, execution and science overview |
| VerfasserIn |
P. I. Palmer, M. Parrington, J. D. Lee, A. C. Lewis, A. R. Rickard, P. F. Bernath, T. J. Duck, D. L. Waugh, D. W. Tarasick, S. Andrews, E. Aruffo, L. J. Bailey, E. Barrett, S. J.-B. Bauguitte, K. R. Curry, P. Carlo, L. Chisholm, L. Dan, G. Förster, J. E. Franklin, M. D. Gibson, D. Griffin, D. Helmig, J. R. Hopkins, J. T. Hopper, M. E. Jenkin, D. Kindred, J. Kliever, M. Breton, S. Matthiesen, M. Maurice, S. Moller, D. P. Moore, D. E. Oram, S. J. O'Shea, R. C. Owen, C. M. L. S. Pagniello, S. Pawson, C. J. Percival, J. R. Pierce, S. Punjabi, R. M. Purvis, J. J. Remedios, K. M. Rotermund, K. M. Sakamoto, A. M. Silva, K. B. Strawbridge, K. Strong, J. Taylor, R. Trigwell, K. A. Tereszchuk, K. A. Walker, D. Weaver, C. Whaley, J. C. Young |
| 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. 13 ; Nr. 13, no. 13 (2013-07-01), S.6239-6261 |
| Datensatznummer |
250018731
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| Publikation (Nr.) |
 copernicus.org/acp-13-6239-2013.pdf |
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| Zusammenfassung |
| We describe the design and execution of the BORTAS (Quantifying the impact of
BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites)
experiment, which has the overarching objective of understanding the chemical
aging of air masses that contain the emission products from seasonal boreal
wildfires and how these air masses subsequently impact downwind atmospheric
composition. The central focus of the experiment was a two-week deployment of
the UK BAe-146-301 Atmospheric Research Aircraft (ARA) over eastern Canada,
based out of Halifax, Nova Scotia. Atmospheric ground-based and sonde
measurements over Canada and the Azores associated with the planned July 2010
deployment of the ARA, which was postponed by 12 months due to UK-based
flights related to the dispersal of material emitted by the
Eyjafjallajökull volcano, went ahead and constituted phase A of the
experiment. Phase B of BORTAS in July 2011 involved the same atmospheric
measurements, but included the ARA, special satellite observations and a more
comprehensive ground-based measurement suite. The high-frequency aircraft
data provided a comprehensive chemical snapshot of pyrogenic plumes from
wildfires, corresponding to photochemical (and physical) ages ranging from
< 1 day to ~<45 sr 10 days, largely by virtue of widespread fires over
Northwestern Ontario. Airborne measurements reported a large number of
emitted gases including semi-volatile species, some of which have not been
been previously reported in pyrogenic plumes, with the corresponding emission
ratios agreeing with previous work for common gases. Analysis of the
NOy data shows evidence of net ozone production in pyrogenic plumes,
controlled by aerosol abundance, which increases as a function of
photochemical age. The coordinated ground-based and sonde data provided
detailed but spatially limited information that put the aircraft data into
context of the longer burning season in the boundary layer. Ground-based
measurements of particulate matter smaller than 2.5 μm (PM2.5)
over Halifax show that forest fires can on an episodic basis represent a
substantial contribution to total surface PM2.5. |
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