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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.
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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: |
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| Date: | 01 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 | ||||||
| HGF - Program: | Space | ||||||
| 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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