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3-D polarised simulations of space-borne passive mm/sub-mm midlatitude cirrus observations: a case study

Atmospheric chemistry and physics, 2007-01, Vol.7 (15), p.4149-4158 [Peer Reviewed Journal]

Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 1680-7324 ;ISSN: 1680-7316 ;EISSN: 1680-7324 ;DOI: 10.5194/acp-7-4149-2007

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  • Title:
    3-D polarised simulations of space-borne passive mm/sub-mm midlatitude cirrus observations: a case study
  • Author: Davis, C. P. ; Evans, K. F. ; Buehler, S. A. ; Wu, D. L. ; Pumphrey, H. C.
  • Subjects: Ocean, Atmosphere ; Rymdteknik ; Sciences of the Universe ; Space Technology
  • Is Part Of: Atmospheric chemistry and physics, 2007-01, Vol.7 (15), p.4149-4158
  • Description: 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.
  • Publisher: European Geosciences Union
  • Language: English
  • Identifier: ISSN: 1680-7324
    ISSN: 1680-7316
    EISSN: 1680-7324
    DOI: 10.5194/acp-7-4149-2007
  • Source: Hyper Article en Ligne (HAL) (Open Access)
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