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| Titel |
3-D polarised simulations of space-borne passive mm/sub-mm midlatitude cirrus observations: a case study |
| VerfasserIn |
C. P. Davis, K. F. Evans, S. A. Buehler, D. L. Wu, H. C. Pumphrey |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 15 ; Nr. 7, no. 15 (2007-08-07), S.4149-4158 |
| Datensatznummer |
250005159
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| Publikation (Nr.) |
 copernicus.org/acp-7-4149-2007.pdf |
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| Zusammenfassung |
| 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. |
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