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Cloud detection in the upper troposphere-lower stratosphere region via ACE imagers: A qualitative study

dc.contributor.authorDodion, J.
dc.contributor.authorFussen, D.
dc.contributor.authorVanhellemont, F.
dc.contributor.authorBingen, C.
dc.contributor.authorMateshvili, N.
dc.contributor.authorGilbert, K.
dc.contributor.authorSkelton, R.
dc.contributor.authorTurnbull, D.
dc.contributor.authorMcLeod, S.D.
dc.contributor.authorBoone, C.D.
dc.contributor.authorWalker, K.A.
dc.contributor.authorBernath, P.F.
dc.date2007
dc.date.accessioned2016-09-26T12:43:59Z
dc.date.available2016-09-26T12:43:59Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/4375
dc.descriptionSatellite-based limb occultation measurements are well suited for the detection and mapping of polar stratospheric clouds (PSCs) and cirrus clouds. Usually, cloud signatures are detected on aerosol extinction profiles. In this paper, ACE two-dimensional (2-D) imager data are used to show PSCs and cirrus clouds. Clouds can be clearly seen, with a good vertical and horizontal resolution (1 km), during sunset and sunrise. In addition, we discovered significant differences between stratospheric (PSCs) and tropospheric (cirrus) clouds. PSCs appear as "symmetric" layers, no horizontal or vertical "structure" is detected within the PSC, suggesting that PSCs are uniform clouds with a very large horizontal extent. On the other hand, cirrus cloud image geometry is not well-defined. In contrast to PSCs, cirrus clouds appear as irregular shaped clouds. These tropospheric clouds seem to have horizontal dimensions similar to the Sun on the image (25 km at the tangent point). The qualitative display of these different kinds of clouds, seen on the raw 2-D imager data, proves the ability of the imagers to be an efficient cloud detector in the upper troposphere-lower stratosphere (UTLS) region. Moreover, the structure of these clouds can be derived.
dc.languageeng
dc.relation.ispartofseries
dc.titleCloud detection in the upper troposphere-lower stratosphere region via ACE imagers: A qualitative study
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeAtmospheric aerosols
dc.subject.freeClouds
dc.subject.freeImaging techniques
dc.subject.freeMapping
dc.subject.freeTroposphere
dc.subject.freeTwo dimensional
dc.subject.freeUpper atmosphere
dc.subject.freecirrus
dc.subject.freedetection method
dc.subject.freegeometry
dc.subject.freemapping method
dc.subject.freepolar stratospheric cloud
dc.subject.freequalitative analysis
dc.subject.freesatellite imagery
dc.subject.freestratosphere
dc.subject.freetroposphere
dc.subject.freetwo-dimensional modeling
dc.source.titleJournal of Geophysical Research: Atmospheres
dc.source.volume112
dc.source.issue3
dc.source.pageD03208
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2006JD007160
dc.identifier.scopus2-s2.0-34547773375


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