KIT | KIT-Bibliothek | Impressum | Datenschutz

A multi-wavelength classification method for polar stratospheric cloud types using infrared limb spectra

Spang, Reinhold; Hoffmann, Lars; Höpfner, Michael ORCID iD icon 1; Griessbach, Sabine; Müller, Rolf; Pitts, Michael C.; Orr, Andrew M. W.; Riese, Martin
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract:

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument on board the ESA Envisat satellite operated from July 2002 until April 2012. The infrared limb emission measurements represent a unique dataset of daytime and night-time observations of polar stratospheric clouds (PSCs) up to both poles. Cloud detection sensitivity is comparable to space-borne lidars, and it is possible to classify different cloud types from the spectral measurements in different atmospheric windows regions. Here we present a new infrared PSC classification scheme based on the combination of a well-established two-colour ratio method and multiple 2-D brightness temperature difference probability density functions. The method is a simple probabilistic classifier based on Bayes’ theorem with a strong independence assumption. The method has been tested in conjunction with a database of radiative transfer model calculations of realistic PSC particle size distributions, geometries, and composition. The Bayesian classifier distinguishes between solid particles of ice and nitric acid trihydrate (NAT), as well as liquid droplets of super-cooled ternary solution (STS).
... mehr


Volltext §
DOI: 10.5445/IR/1000059936
Originalveröffentlichung
DOI: 10.5194/amt-9-3619-2016
Scopus
Zitationen: 19
Web of Science
Zitationen: 16
Dimensions
Zitationen: 26
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
urn:nbn:de:swb:90-599361
KITopen-ID: 1000059936
HGF-Programm 12.04.03 (POF III, LK 01) Stratospheric Ozone and Climate Change
Erschienen in Atmospheric measurement techniques
Verlag Copernicus Publications
Band 9
Heft 8
Seiten 3619-3639
Nachgewiesen in Dimensions
Web of Science
Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page