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Detection of Martian dust clouds by SPICAM UV nadir measurements during the October 2005 regional dust storm

dc.contributor.authorMateshvili, N.
dc.contributor.authorFussen, D.
dc.contributor.authorVanhellemont, F.
dc.contributor.authorBingen, C.
dc.contributor.authorDodion, J.
dc.contributor.authorMontmessin, F.
dc.contributor.authorPerrier, S.
dc.contributor.authorBertaux, J.L.
dc.date2007
dc.date.accessioned2016-09-26T11:46:22Z
dc.date.available2016-09-26T11:46:22Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/4364
dc.descriptionThe SPICAM UV spectrometer onboard Mars Express observed two regional dust storms: on October 24, 2005, near Argyre Planitia and on July 9, 2005, in Hellas Planitia. The measurements were performed in nadir mode. The spectral domain 210-310 nm is considered. A comparison with a prior orbit which passed above almost the same path 6 days before the storm near Argyre Planitia has shown a significant decrease of the radiance factor. The difference grows at shorter wavelengths and shows significant dust absorption in the UV. The data have been used to retrieve the dust optical thickness τ, single scattering albedo w and asymmetry factor g. The fitting of the spectra by a radiative transfer code has revealed a set of solutions which could be constrained by Mie modeling of the parameters τ, w, and g for a gamma particle size distribution. The following estimates of the dust optical parameters are obtained: w = 0.64 ± 0.04 at λ = 300 nm and decreases to 0.6 ± 0.045 at 213 nm, g = 0.86 ± 0.03 at 300 nm and slightly grows to 0.88 ± 0.04 at 213 nm, τ = 2.5 ± 0.5 for the first dust event and τ = 2.0 ± 0.5 for the second one. The obtained values of single scattering albedo are consistent with the Hubble Space Telescope and Mariner 9 results.
dc.languageeng
dc.relation.ispartofseries
dc.titleDetection of Martian dust clouds by SPICAM UV nadir measurements during the October 2005 regional dust storm
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeAerosols
dc.subject.freeMartian surface analysis
dc.subject.freeOptical properties
dc.subject.freeRadiative transfer
dc.subject.freeScattering
dc.subject.freeUltraviolet spectrometers
dc.subject.freeMartian atmosphere
dc.subject.freeMie modeling
dc.subject.freeOptical parameters
dc.subject.freeDust
dc.source.titleAdvances in Space Research
dc.source.volume40
dc.source.issue6
dc.source.page869-880
Orfeo.peerreviewedYes
dc.identifier.doi10.1016/j.asr.2007.06.028
dc.identifier.scopus2-s2.0-34548361771


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