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| Titel |
First results from novel 4-azimuth MAX-DOAS measurements in Mainz, Germany |
| VerfasserIn |
Julia Remmers, Steffen Beirle, Sven Krautwurst, Kornelia Mies, Reza Shaiganfar, Thomas Wagner |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250058209
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| Zusammenfassung |
| Multi-Axis (MAX-) DOAS instruments observe scattered sun light under various mostly slant
elevation angles. From such observations information on tropospheric profiles of trace gases
and aerosols can be retrieved. MAX-DOAS observations can be used to quantify emissions,
to study chemical processes in the atmosphere and to validate satellite observations of
tropospheric trace gases.
Usually, MAX-DOAS observations use only one azimuth direction. Here we present
MAX-DOAS measurements, which are simultaneously performed at four azimuth directions.
These measurements allow to derive additional information on horizontal gradients of
atmospheric trace gases and aerosols close to the surface. Such information is in particular
interesting for two applications: first, it important for satellite validation because of the large
ground pixel sizes. In addition it can be used to quantify possible errors of the MAX-DOAS
profile retrievals in the presence of such gradients and horizontal transport. In such cases, the
resulting temporal variations affect the trace gas absorptions obtained during one elevation
sequence.
We describe the set-up and the technical features of our novel MAX-DOAS instrument
and give an overview on the measurement strategies. We present the first analysis results of
the NO2 and aerosol distributions. |
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