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The influence of broken cloudiness on cloud top height retrievals using nadir observations of backscattered solar radiation in the oxygen A-band

Kokhanovsky, A.A. and Mayer, B. and Rozanov, V.V. and Wapler, K. and Burrows, J.P. and Schumann, U. (2007) The influence of broken cloudiness on cloud top height retrievals using nadir observations of backscattered solar radiation in the oxygen A-band. Journal of Quantitative Spectroscopy and Radiative Transfer, 103, pp. 460-477. DOI: 10.1016/j.jqsrt.2006.06.003.

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Official URL: http://www.elsevier.com/locate/jqsrt

Abstract

The paper is devoted to theoretical studies of the influence of cloud inhomogeneities on cloud top height (CTH) retrievals based on top-of-atmosphere nadir reflectance observations in the oxygen A-band. A three-demensional (3D) Monte Carlo code is used to simulate highly resolved spectral measurements in the oxygen A-band. These synthetic radiances are used as input for the retrieval code SACURA based on asymptotic radiative transfer theory and the independent pixel approximation. The results show that the effect of cloud inhomogeneity on the derived CTHs is small. While we found considerable 3D effects in the reflectance of more than 30% compared to the independent column approximation, the spectral dependence of the difference was small. As SACURA is mainly based on spectral ratios, the retrieval results are hardly affected by the large absolute deviations. In consequence, SACURA is capable to retrieve CTHs with an accuracy of better than 1.5km for overcast and also most partially cloudy cases.

Document Type:Article
Title:The influence of broken cloudiness on cloud top height retrievals using nadir observations of backscattered solar radiation in the oxygen A-band
Authors:
AuthorsInstitution or Email of Authors
Kokhanovsky, A.A.Univ. of Bremen, Bremen
Mayer, B.UNSPECIFIED
Rozanov, V.V.Univ. of Bremen, Bremen
Wapler, K.UNSPECIFIED
Burrows, J.P.Univ. of Bremen, Bremen
Schumann, U.UNSPECIFIED
Date:2007
Journal or Publication Title:Journal of Quantitative Spectroscopy and Radiative Transfer
Volume:103
DOI:10.1016/j.jqsrt.2006.06.003
Page Range:pp. 460-477
Status:Published
Keywords:Cloud, Remote sensing, Cloud top height, Light scattering, Radiative transfer
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Jana Freund
Deposited On:16 Jul 2007
Last Modified:12 Dec 2013 20:22

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