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Retrieving radius, concentration, optical depth, and mass of different types of aerosols from high-resolution infrared nadir spectra

dc.contributor.authorClarisse, L.
dc.contributor.authorHurtmans, D.
dc.contributor.authorPrata, A.J.
dc.contributor.authorKaragulian, F.
dc.contributor.authorClerbaux, C.
dc.contributor.authorDe Mazière, M.
dc.contributor.authorCoheur, P.-F.
dc.date2010
dc.date.accessioned2016-03-30T12:01:16Z
dc.date.available2016-03-30T12:01:16Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3159
dc.descriptionWe present a sophisticated radiative transfer code for modeling outgoing IR radiation from planetary atmospheres and, conversely, for retrieving atmospheric properties from high-resolution nadir-observed spectra. The forward model is built around a doubling-adding routine and calculates, in a spherical refractive geometry, the outgoing radiation emitted by the Earth and the atmosphere containing one layer of aerosol. The inverse model uses an optimal estimation approach and can simultaneously retrieve atmospheric trace gases, aerosol effective radius, and concentration. It is different from existing codes, as most forward codes dealing with multiple scattering assume a plane-parallel atmosphere, and as for the retrieval, it does not rely on precalculated spectra, the use of microwindows, or two-step retrievals. The simultaneous retrieval on a broad spectral range exploits the full potential of current state-of-the-art hyperspectral IR sounders, such as AIRS and IASI, and should be particularly useful in studying major pollution events. We present five example retrievals of IASI spectra observed in the range from 800 to 1200 cm-1 above dust, volcanic ash, sulfuric acid, ice particles, and biomass burning aerosols.
dc.languageeng
dc.titleRetrieving radius, concentration, optical depth, and mass of different types of aerosols from high-resolution infrared nadir spectra
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeAir pollution
dc.subject.freeForward scattering
dc.subject.freeInfrared instruments
dc.subject.freeRadiative transfer
dc.subject.freeSulfuric acid
dc.subject.freeVolcanoes
dc.subject.freeA-plane
dc.subject.freeAtmospheric properties
dc.subject.freeAtmospheric trace gas
dc.subject.freeBiomass-burning
dc.subject.freeBroad spectral
dc.subject.freeEffective radius
dc.subject.freeForward models
dc.subject.freeHigh resolution
dc.subject.freeHyperSpectral
dc.subject.freeIce particles
dc.subject.freeInverse models
dc.subject.freeMicrowindows
dc.subject.freeOptical depth
dc.subject.freeOptimal estimations
dc.subject.freePlanetary atmosphere
dc.subject.freeRadiative transfer codes
dc.subject.freeVolcanic ash
dc.subject.freeAtmospheric aerosols
dc.source.titleApplied Optics
dc.source.volume49
dc.source.issue19
dc.source.page3713-3722
Orfeo.peerreviewedYes
dc.identifier.doi10.1364/AO.49.003713
dc.identifier.scopus2-s2.0-77955955085


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