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Linearization of a radiative transfer model in spherical geometry

Walter, Holger and Landgraf, Jochen and Spada, Francesco and Doicu, Adrian (2006) Linearization of a radiative transfer model in spherical geometry. Journal of Geophysical Research, 111, D24304. AGU. DOI: 10.1029/2005JD007014.

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Official URL: http://www.agu.org/journals/jd/

Abstract

For the interpretation of satellite limb observations we investigate the linearization capability of spherical radiative transfer in the ultraviolet and visible part of the solar spectrum, where multiple scattering of light complicates the model simulations. From plane-parallel radiative transfer it is known that the forward-adjoint perturbation theory provides a powerful linearization tool. Its application to limb measurement simulations is the subject of this paper. First, we solve the scalar radiative transfer problem in spherical geometry in its forward and adjoint formulation. Subsequently, we apply the perturbation theory approach in the calculation of the derivatives of the intensity at the top of the atmosphere with respect to the absorption properties of a trace gas species in the case of a limb-viewing satellite instrument. The calculated derivatives are validated with a reference method, and the agreement in the upper atmosphere is very good, whereas deviations occur below the tangent height. Here the determination of the derivatives is clearly sensitive to the discretization of the problem. Finally, we perform an analysis for different viewing scenarios to characterize the capability of the described linearization approach.

Document Type:Article
Title:Linearization of a radiative transfer model in spherical geometry
Authors:
AuthorsInstitution or Email of Authors
Walter, HolgerSRON, Utrecht, Netherlands
Landgraf, JochenSRON, Utrecht, Netherlands
Spada, FrancescoInstitute for Marine and Atmospheric Research Utrecht, University of Utrecht, Netherlands
Doicu, AdrianUNSPECIFIED
Date:2006
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:111
DOI:10.1029/2005JD007014
Page Range:D24304
Publisher:AGU
Status:Published
Keywords:linearized radiative transfer; perturbation theory; spherical geometry.
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 Entwicklung von Atmosphärenprozessoren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Remote Sensing Technology Institute > Experimental Methods
Deposited By: Dr.rer.nat. Franz Schreier
Deposited On:06 Mar 2007
Last Modified:15 Jan 2010 00:24

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