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| Titel |
GOMOS bright limb ozone data set |
| VerfasserIn |
S. Tukiainen, E. Kyrölä, J. Tamminen, J. Kujanpää, L. Blanot |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 8 ; Nr. 8, no. 8 (2015-08-05), S.3107-3115 |
| Datensatznummer |
250116518
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| Publikation (Nr.) |
 copernicus.org/amt-8-3107-2015.pdf |
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| Zusammenfassung |
| We have created a daytime ozone profile data set from the measurements of the
Global Ozone Monitoring by Occultation of Stars (GOMOS) instrument on board
the Envisat satellite. This so-called GOMOS bright limb (GBL) data set
contains ∼ 358 000 stratospheric daytime ozone profiles measured by
GOMOS in 2002–2012. The GBL data set complements the widely used GOMOS
nighttime data based on stellar occultation measurements. The GBL data set is
based on the GOMOS daytime occultations but instead of the transmitted star
light we use limb-scattered solar light. The ozone profiles retrieved from
these radiance spectra cover the 18–60 km altitude range and have
approximately 2–3 km vertical resolution. We show that these
profiles are generally in better than 10 % agreement with the NDACC
(Network for the Detection of Atmospheric Composition Change) ozonesonde
profiles and with the GOMOS nighttime, MLS (Microwave Limb Sounder), and
OSIRIS (Optical Spectrograph and InfraRed Imager System) satellite
measurements. However, there is a 10–13 % negative bias at 40 km
altitude and a 10–50 % positive bias at 50 km for solar zenith
angles > 75°. These biases are most likely caused by stray light
which is difficult to characterize and to remove entirely from the measured
spectra. Nevertheless, the GBL data set approximately doubles the amount of
useful GOMOS ozone profiles and improves coverage of the summer pole. |
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