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Evidence of scattering of tropospheric radiation by PSCs in mid‐IR limb emission spectra: MIPAS‐B observations and KOPRA simulations
Author(s) -
Höpfner M.,
Oelhaf H.,
Wetzel G.,
FriedlVallon F.,
Kleinert A.,
Lengel A.,
Maucher G.,
Nordmeyer H.,
Glatthor N.,
Stiller G.,
Clarmann T. v.,
Fischer H.,
Kröger C.,
Deshler T.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl014443
Subject(s) - michelson interferometer , atmospheric sounding , radiance , scattering , physics , interferometry , troposphere , spectral line , effective radius , radiative transfer , radiation , optics , environmental science , remote sensing , atmospheric sciences , astrophysics , geology , astronomy , galaxy
Polar stratospheric clouds (PSCs) were observed by the high resolution mid infrared Michelson Interferometer for Passive Atmospheric Sounding, Balloon borne version (MIPAS‐B), on a flight from Kiruna/Sweden on January 11, 2001. Highly resolved spectral features in the limb measurements could only be explained by tropospheric radiation scattered into the line of sight by large PSC particles. Furthermore, model calculations showed that for PSCs with particles of radius ≥1 μm, a significant part of the broadband continuum radiance signal is due to scattering. Inclusion of scattering in the retrieval process resulted in reasonable values of otherwise largely overestimated PSC volume density profiles.