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3-D polarised simulations of space-borne passive mm/sub-mm midlatitude cirrus observations: a case study
University of Edinburgh, Institute of Atmospheric and Environmental Science.
Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder.
Luleå tekniska universitet, Institutionen för system- och rymdteknik, Rymdteknik.ORCID-id: 0000-0001-6389-1160
Jet Propulsion Laboratory, California Institute of Technology, Pasadena.
Vise andre og tillknytning
2007 (engelsk)Inngår i: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 7, nr 15, s. 4149-4158Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Global observations of ice clouds are needed to improve our understanding of their impact on earth's radiation balance and the water-cycle. Passive mm/sub-mm has some advantages compared to other space-borne cloud-ice remote sensing techniques. The physics of scattering makes forward radiative transfer modelling for such instruments challenging. This paper demonstrates the ability of a recently developed RT code, ARTS-MC, to accurately simulate observations of this type for a variety of viewing geometries corresponding to operational (AMSU-B, EOS-MLS) and proposed (CIWSIR) instruments. ARTS-MC employs an adjoint Monte-Carlo method, makes proper account of polarisation, and uses 3-D spherical geometry. The actual field of view characteristics for each instrument are also accounted for. A 3-D midlatitude cirrus scenario is used, which is derived from Chilbolton cloud radar data and a stochastic method for generating 3-D ice water content fields. These demonstration simulations clearly demonstrate the beamfilling effect, significant polarisation effects for non-spherical particles, and also a beamfilling effect with regard to polarisation.

sted, utgiver, år, opplag, sider
2007. Vol. 7, nr 15, s. 4149-4158
HSV kategori
Forskningsprogram
Rymdteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-11181DOI: 10.5194/acp-7-4149-2007Lokal ID: a16edbd0-8ea4-11dc-a188-000ea68e967bOAI: oai:DiVA.org:ltu-11181DiVA, id: diva2:984130
Merknad
Validerad; 2007; 20071109 (sbuehler)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-11-24bibliografisk kontrollert

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