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The GOME-2 total column ozone product: Retrieval algorithm and ground-based validation

dc.contributor.authorLoyola, D.G.
dc.contributor.authorKoukouli, M.E.
dc.contributor.authorValks, P.
dc.contributor.authorBalis, D.S.
dc.contributor.authorHao, N.
dc.contributor.authorVan Roozendael, M.
dc.contributor.authorSpurr, R.J.D.
dc.contributor.authorZimmer, W.
dc.contributor.authorKiemle, S.
dc.contributor.authorLerot, C.
dc.contributor.authorLambert, J.-C.
dc.date2011
dc.date.accessioned2016-03-29T12:43:52Z
dc.date.available2016-03-29T12:43:52Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3100
dc.descriptionThe Global Ozone Monitoring Instrument (GOME-2) was launched on EUMESAT's MetOp-A satellite in October 2006. This paper is concerned with the retrieval algorithm GOME Data Processor (GDP) version 4.4 used by the EUMETSAT Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M-SAF) for the operational generation of GOME-2 total ozone products. GDP 4.4 is the latest version of the GDP 4.0 algorithm, which is employed for the generation of official Level 2 total ozone and other trace gas products from GOME and SCIAMACHY. Here we focus on enhancements introduced in GDP 4.4: improved cloud retrieval algorithms including detection of Sun glint effects, a correction for intracloud ozone, better treatment of snow and ice conditions, accurate radiative transfer modeling for large viewing angles, and elimination of scan angle dependencies inherited from Level 1 radiances. Furthermore, the first global validation results for 3 years (2007–2009) of GOME-2/MetOp-A total ozone measurements using Brewer and Dobson measurements as references are presented. The GOME-2/MetOp-A total ozone data obtained with GDP 4.4 slightly underestimates ground-based ozone by about 0.5% to 1% over the middle latitudes of the Northern Hemisphere and slightly overestimates by around 0.5% over the middle latitudes in the Southern Hemisphere. Over high latitudes in the Northern Hemisphere, GOME-2 total ozone has almost no offset relative to Dobson readings, while over high latitudes in the Southern Hemisphere GOME-2 exhibits a small negative bias below 1%. For tropical latitudes, GOME-2 measures on average lower ozone by 0% to 2% compared to Dobson measurements.
dc.languageeng
dc.titleThe GOME-2 total column ozone product: Retrieval algorithm and ground-based validation
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeAlgorithms
dc.subject.freeAtmospheric chemistry
dc.subject.freeMonitoring
dc.subject.freeSearch engines
dc.subject.freeCloud retrieval algorithms
dc.subject.freeData processors
dc.subject.freeGlobal validation
dc.subject.freeGround based
dc.subject.freeHigh Latitudes
dc.subject.freeIntracloud
dc.subject.freeLarge viewing angle
dc.subject.freeLevel 2
dc.subject.freeLevel-1
dc.subject.freeMetop-a
dc.subject.freeNegative bias
dc.subject.freeNorthern Hemispheres
dc.subject.freeOzone monitoring instruments
dc.subject.freeRadiative transfer modeling
dc.subject.freeRetrieval algorithms
dc.subject.freeSatellite application facilities
dc.subject.freeScan angle
dc.subject.freeSnow and ice
dc.subject.freeSouthern Hemisphere
dc.subject.freeSun glint
dc.subject.freeTotal column ozone
dc.subject.freeTotal ozone
dc.subject.freeTotal ozone data
dc.subject.freeTotal ozone measurements
dc.subject.freeTrace gas
dc.subject.freeTropical latitudes
dc.subject.freeOzone
dc.subject.freealgorithm
dc.subject.freeatmospheric chemistry
dc.subject.freeGOME
dc.subject.freemodel validation
dc.subject.freeNorthern Hemisphere
dc.subject.freeozone
dc.subject.freeSouthern Hemisphere
dc.subject.freetrace gas
dc.source.titleJournal of Geophysical Research: Atmospheres
dc.source.volume116
dc.source.issue7
dc.source.pageD07302
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2010JD014675
dc.identifier.scopus2-s2.0-79951823398


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