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Three-dimensional Monte Carlo calculation of atmospheric thermal heating rates

Klinger, Carolin and Mayer, Bernhard (2014) Three-dimensional Monte Carlo calculation of atmospheric thermal heating rates. Journal of Quantitative Spectroscopy and Radiative Transfer, 144, pp. 123-136. Elsevier. DOI: 10.1016/j.jqsrt.2014.04.009 ISSN 0022-4073

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Official URL: http://dx.doi.org/10.1016/j.jqsrt.2014.04.009

Abstract

We present a fast Monte Carlo method for thermal heating and cooling rates in three-dimensional atmospheres. These heating/cooling rates are relevant particularly in broken cloud fields. We compare forward and backward photon tracing methods and present new variance reduction methods to speed up the calculations. For this application it turns out that backward tracing is in most cases superior to forward tracing. Since heating rates may be either calculated as the difference between emitted and absorbed power per volume or alternatively from the divergence of the net flux, both approaches have been tested. We found that the absorption/emission method is superior (with respect to computational time for a given uncertainty) if the optical thickness of the grid box under consideration is smaller than about 5 while the net flux divergence may be considerably faster for larger optical thickness.

Item URL in elib:https://elib.dlr.de/93272/
Document Type:Article
Title:Three-dimensional Monte Carlo calculation of atmospheric thermal heating rates
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klinger, CarolinLMU, MünchenUNSPECIFIED
Mayer, BernhardLMU / DLR, IPAUNSPECIFIED
Date:2014
Journal or Publication Title:Journal of Quantitative Spectroscopy and Radiative Transfer
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:144
DOI :10.1016/j.jqsrt.2014.04.009
Page Range:pp. 123-136
Publisher:Elsevier
ISSN:0022-4073
Status:Published
Keywords:Monte Carlo; Heating rates; Radiative transfer; Thermal radiation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Ziegele, Brigitte
Deposited On:08 Dec 2014 12:55
Last Modified:10 Jan 2019 15:53

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