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| Titel |
MAX-DOAS detection of glyoxal during ICARTT 2004 |
| VerfasserIn |
R. Sinreich, R. Volkamer, F. Filsinger, U. Frieß, C. Kern, U. Platt, O. Sebastián, T. Wagner |
| 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 ; 7, no. 5 ; Nr. 7, no. 5 (2007-02-22), S.1293-1303 |
| Datensatznummer |
250004744
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| Publikation (Nr.) |
 copernicus.org/acp-7-1293-2007.pdf |
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| Zusammenfassung |
| The direct detection of glyoxal (CHOCHO), the smallest α-dicarbonyl,
in the open atmosphere by active differential optical absorption
spectroscopy (DOAS) has recently been demonstrated (Volkamer et al., 2005a)
and triggered the very recent successful detection of CHOCHO from space
(Kurosu et al., 2005; Wittrock et al., 2006; Beirle et al., 2006). Here we
report the first comprehensive analysis of CHOCHO by passive multi axis
differential optical absorption spectroscopy (MAX-DOAS). CHOCHO and NO2
slant column measurements were conducted at the Massachusetts Institute of
Technology (MIT), Cambridge, USA, and on board the research vessel Ron Brown
in the Gulf of Maine as part of the International Consortium for Atmospheric
Research on Transport and Transformation (ICARTT) 2004 campaign. For a day
with nearly clear sky conditions, radiative transfer modeling was employed
to derive diurnal CHOCHO mixing ratios in the planetary boundary layer (PBL)
for both sites. CHOCHO mixing ratios at MIT varied from 40 to 140 ppt, with
peak values observed around noon. Mixing ratios over the Gulf of Maine were
found to be up to 2.5 times larger than at MIT. The CHOCHO-to-NO2 ratio
at MIT was <0.03, and enhancements of this ratio by up to two orders of
magnitude were found over the Gulf of Maine. This paper focuses on the
methodological aspects involved with MAX-DOAS measurements of CHOCHO. |
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