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Ten years of GOME/ERS-2 total ozone data - The new GOME data processor (GDP) version 4: 1. Algorithm description

dc.contributor.authorVan Roozendael, M.
dc.contributor.authorLoyola, D.
dc.contributor.authorSpurr, R.
dc.contributor.authorBalis, D.
dc.contributor.authorLambert, J.-C.
dc.contributor.authorLivschitz, Y.
dc.contributor.authorValks, P.
dc.contributor.authorRuppert, T.
dc.contributor.authorKenter, P.
dc.contributor.authorFayt, C.
dc.contributor.authorZehner, C.
dc.date2006
dc.date.accessioned2016-11-22T11:57:30Z
dc.date.available2016-11-22T11:57:30Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/4504
dc.descriptionThe Global Ozone Monitoring Instrument (GOME) was launched on European Space Agency's ERS-2 platform in April 1995. The GOME data processor (GDP) operational retrieval algorithm has generated total ozone columns since July 1995. In 2004 the GDP system was given a major upgrade to version 4.0, a new validation was performed, and the 10-year GOME level 1 data record was reprocessed. In two papers, we describe the GDP 4.0 retrieval algorithm and present an error budget and sensitivity analysis (paper 1) and validation of the GDP total ozone product and the overall accuracy of the entire GOME ozone record (paper 2). GDP 4.0 uses an optimized differential optical absorption spectroscopy (DOAS) algorithm, with air mass factor (AMF) conversions calculated using the radiative transfer code linearized discrete ordinate radiative transfer (LIDORT). AMF computation is based on the TOMS version 8 ozone profile climatology, classified by total column, and AMFs are adjusted iteratively to reflect the DOAS slant column result. GDP 4.0 has improved wavelength calibration and reference spectra and includes a new molecular Ring correction to deal with distortion of ozone absorption features due to inelastic rotational Raman scattering effects. Preprocessing for cloud parameter estimation in GDP 4.0 is done using two new cloud correction algorithms: OCRA and ROCINN. For clear and cloudy scenes the precision of the ozone column product is better than 2.4 and 3.3%, respectively, for solar zenith angles up to 80°. Comparisons with ground-based data are generally at the 1-1.5% level or better for all regions outside the poles.
dc.languageeng
dc.titleTen years of GOME/ERS-2 total ozone data - The new GOME data processor (GDP) version 4: 1. Algorithm description
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeAbsorption spectroscopy
dc.subject.freeAlgorithms
dc.subject.freeAtmospheric radiation
dc.subject.freeClimatology
dc.subject.freeLight absorption
dc.subject.freeMeteorological instruments
dc.subject.freeOzone
dc.subject.freeRaman scattering
dc.subject.freeSensitivity analysis
dc.subject.freeatomic absorption spectroscopy
dc.subject.freedata processing
dc.subject.freeerror analysis
dc.subject.freeGOME
dc.subject.freeground-based measurement
dc.subject.freeparameterization
dc.subject.freeradiative transfer
dc.subject.freesensitivity analysis
dc.subject.freetotal ozone
dc.source.titleJournal of Geophysical Research Atmospheres
dc.source.volume111
dc.source.issue14
dc.source.pageD14311
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2005JD006375
dc.identifier.scopus2-s2.0-33846076704


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