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| Titel |
Microwave Limb Sounder observations of biomass-burning products from the Australian bush fires of February 2009 |
| VerfasserIn |
H. C. Pumphrey, M. L. Santee, N. J. Livesey, M. J. Schwartz, W. G. Read |
| 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 ; 11, no. 13 ; Nr. 11, no. 13 (2011-07-01), S.6285-6296 |
| Datensatznummer |
250009886
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| Publikation (Nr.) |
 copernicus.org/acp-11-6285-2011.pdf |
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| Zusammenfassung |
| The large bush fires which occurred in southeast Australia in February
2009 were unusually destructive. However, they were also unusual in
the amounts of various combustion products which were injected
directly into the stratosphere. We report the observations by the
Microwave Limb Sounder (MLS) instrument on the Aura satellite of some
of these combustion products. The highest quality observations are of
CO; these clearly show a large region of enhanced mixing ratios to the
north of New Zealand which remains in that region for about ten days
before drifting westwards and finally dissipating over the Atlantic
about a month after the fire. The region of enhanced CO ascends from
the tropopause to 46 hPa during this period. Back trajectories run
from the points where MLS observes enhanced CO pass close to the site
of the fire. The MLS observations of CH3CN and HCN resemble those
of CO except for their poorer vertical resolution and more limited
vertical range. An apparent enhancement in ClO is also observed by
MLS, but detailed analysis of the measured radiances reveals this
feature to be a signature of CH3OH, which is not currently
retrieved by the MLS data processing system. The fires of February
2009 are the only event of this type and magnitude in the 7-yr MLS
record. |
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