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Proceedings Paper

Development of a correlated-k distribution band model scheme for the radiative transfer program GOMETRAN/SCIATRAN for retrieval of atmospheric constituents from SCIMACHY/ENVISAT-1 data
Author(s): Michael Buchwitz; Vladimir V. Rozanov; John P. Burrows
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Paper Abstract

GOMETRAN/SCIATRAN is a radiative transfer forward model developed for retrieval of atmospheric trace gas concentrations, aerosol and cloud parameters, and surface reflectance from the spectral radiance measurements of the SCIAMACHY/ENVISAT-1 and GOME/ERS-2 UV-Vis-NIR multichannel spectrometers. For radiative transfer modeling of the line absorptions of O2, H2O, CO2, CH4, N2O, and CO, tow different schemes are under development: an accurate but rather slow line-by-line (LBL) implementation and a significantly faster correlated-k (c-k) distribution scheme. The c-k scheme has been matched to the resolution of the instruments, which is channel dependent. In spectral regions free of overlapping line-absorbers the multiply scattered radiance calculated with both, the LBL and the c-k scheme, agrees within 1-2 percent. Calculations in c-k mode are a factor of 25-800 faster depending on spectral interval. Good agreement has been found with the MODTRAN/DISORT radiative transfer model. First results concerning a new method are presented indicating that overlapping line-absorbers can be modeled with similar accuracy and speed as single line-absorbers.

Paper Details

Date Published: 14 December 1998
PDF: 16 pages
Proc. SPIE 3495, Satellite Remote Sensing of Clouds and the Atmosphere III, (14 December 1998); doi: 10.1117/12.332681
Show Author Affiliations
Michael Buchwitz, Univ. of Bremen (Germany)
Vladimir V. Rozanov, Moscow State Univ. (Germany)
John P. Burrows, Univ. of Bremen (Germany)

Published in SPIE Proceedings Vol. 3495:
Satellite Remote Sensing of Clouds and the Atmosphere III
Jaqueline E. Russell, Editor(s)

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