 |
| Titel |
First space-borne measurements of methanol inside aged southern tropical to mid-latitude biomass burning plumes using the ACE-FTS instrument |
| VerfasserIn |
G. Dufour, C. D. Boone, C. P. Rinsland, P. F. Bernath |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 6, no. 11 ; Nr. 6, no. 11 (2006-08-21), S.3463-3470 |
| Datensatznummer |
250004065
|
| Publikation (Nr.) |
 copernicus.org/acp-6-3463-2006.pdf |
|
|
|
|
|
| Zusammenfassung |
| First measurements from space of upper tropospheric and lower stratospheric
methanol profiles within aged fire plumes are reported. Elevated levels of
methanol at 0–45° S from 30 September to 3 November 2004 have been
measured by the high resolution infrared spectrometer ACE-FTS onboard the
SCISAT satellite. Methanol volume mixing ratios higher than 4000 pptv are
detected and are strongly correlated with other fire products such as CO,
C2H6, and HCN. A sensitivity study of the methanol retrieval,
accounting for random and systematic contributions, shows that the retrieved
methanol profile for a single occultation exceeds 100% error above 16.5 km, with an accuracy of about
20% for measurements inside polluted air masses. The upper tropospheric
enhancement ratio of methanol with respect to CO is estimated from the
correlation plot between methanol and CO for aged tropical biomass burning
plumes. This ratio is in good agreement with the ratio measured in the free
troposphere (up to 12 km) by recent aircraft studies and does not suggest
any secondary production of methanol by oxidation in aged biomass burning
plumes. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|