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Combining the independent pixel and point-spread function approaches to simulate the actinic radiation field in moderately inhomogeneous 3D cloudy media

Kniffka, Anke and Trautmann, Thomas (2011) Combining the independent pixel and point-spread function approaches to simulate the actinic radiation field in moderately inhomogeneous 3D cloudy media. Journal of Quantitative Spectroscopy and Radiative Transfer, 112 (8), pp. 1383-1393. Elsevier. DOI: http://dx.doi.org/10.1016/j.jqsrt.2011.01.026.

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/journal/00224073

Abstract

A fast method is presented for gaining 3D actinic flux density fields, Fact, in clouds employing the Independent Pixel Approximation (IPA) with a parameterized horizontal photon transport to imitate radiative smoothing effects. For 3D clouds the IPA is an efficient method to simulate radiative transfer, but it suffers from the neglect of horizontal photon fluxes leading to significant errors (up to locally 30% in the present study). Consequently, the resulting actinic flux density fields exhibit an unrealistically rough and rugged structure. In this study, the radiative smoothing is approximated by applying a physically based smoothing algorithm to the calculated IPA actinic flux field.

Document Type:Article
Title:Combining the independent pixel and point-spread function approaches to simulate the actinic radiation field in moderately inhomogeneous 3D cloudy media
Authors:
AuthorsInstitution or Email of Authors
Kniffka, AnkeInstitute for Meteorology, University of Leipzig
Trautmann, ThomasDLR
Date:1 February 2011
Journal or Publication Title:Journal of Quantitative Spectroscopy and Radiative Transfer
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:112
DOI:http://dx.doi.org/10.1016/j.jqsrt.2011.01.026
Page Range:pp. 1383-1393
Publisher:Elsevier
Status:Published
Keywords:Actinic flux; 3D radiative transfer; Radiative smoothing; Independent Pixel Approximation; Point-spread-function
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
Deposited By: Prof.Dr. Thomas Trautmann
Deposited On:30 Mar 2011 15:56
Last Modified:07 Feb 2013 20:14

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