Retrieval of ozone profiles from GOMOS limb scattered measurements
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Authors
Tukiainen, S.
Kyrola, E.
Verronen, P.T.
Fussen, D.
Blanot, L.
Barrot, G.
Hauchecorne, A.
Lloyd, N.
Discipline
Earth and related Environmental sciences
Subject
Envisat-1
ozone
satellite data
signal-to-noise ratio
solar radiation
Allium cepa
Audience
Scientific
Date
2011Metadata
Show full item recordDescription
The GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument on board the Envisat satellite measures the vertical composition of the atmosphere using the stellar occultation technique. While the night-time occultations of GOMOS have been proven to be of good quality, the daytime occultations are more challenging due to weaker signal-to-noise ratio. During daytime GOMOS measures limb scattered solar radiation in addition to stellar radiation. In this paper we introduce a retrieval method that determines ozone profiles between 20-60 km from GOMOS limb scattered solar radiances. GOMOS observations contain a considerable amount of stray light at high altitudes. We introduce a method for removing stray light and demonstrate its feasibility by comparing the corrected radiances against those measured by the OSIRIS (Optical Spectrograph & Infra Red Imaging System) instrument. For the retrieval of ozone profiles, a standard onion peeling method is used. The first comparisons with other data sets suggest that the retrieved ozone profiles in 22-50 km are within 10% compared with the GOMOS night-time occultations and within 15% compared with OSIRIS. GOMOS has measured about 350 000 daytime profiles since 2002. The retrieval method presented here makes this large amount of data available for scientific use.
Citation
Tukiainen, S.; Kyrola, E.; Verronen, P.T.; Fussen, D.; Blanot, L.; Barrot, G.; Hauchecorne, A.; Lloyd, N. (2011). Retrieval of ozone profiles from GOMOS limb scattered measurements. , Atmospheric Measurement Techniques, Vol. 4, Issue 4, 659-667, DOI: 10.5194/amt-4-659-2011.Identifiers
scopus: 2-s2.0-84857710752
Type
Article
Peer-Review
Yes
Language
eng