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GARLIC - A General Purpose Atmospheric Radiative Transfer Line-by-Line Infrared Code: Implementation and Evaluation

Schreier, Franz and Gimeno Garcia, Sebastian and Hedelt, Pascal and Hess, Michael and Mendrok, Jana and Vasquez, Mayte and Xu, Jian (2014) GARLIC - A General Purpose Atmospheric Radiative Transfer Line-by-Line Infrared Code: Implementation and Evaluation. Journal of Quantitative Spectroscopy and Radiative Transfer, 137, pp. 29-50. Elsevier. doi: 10.1016/j.jqsrt.2013.11.018. ISSN 0022-4073.

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Official URL: http://dx.doi.org/10.1016/j.jqsrt.2013.11.018


A suite of programs for high resolution infrared atmospheric radiative transfer modeling has been developed with emphasis on efficient and reliable numerical algorithms and a modular approach appropriate for simulation and/or retrieval in a variety of applications. The Generic Atmospheric Radiation Line-by-line Infrared Code — GARLIC — is suitable for arbitrary observation geometry, instrumental field–of–view, and line shape. The core of GARLIC’s subroutines constitutes the basis of forward models used to implement inversion codes to retrieve atmospheric state parameters from limb and nadir sounding instruments. This paper briefly introduces the physical and mathematical basics of GARLIC and its descendants and continues with an in-depth presentation of various implementation aspects: An optimized Voigt function algorithm combined with a two-grid approach is used to accelerate the line-by-line modeling of molecular cross sections; various quadrature methods are implemented to evaluate the Schwarzschild and Beer integrals; and Jacobians, i.e. derivatives with respect to the unknowns of the atmospheric inverse problem, are implemented by means of automatic differentiation. For an assessment of GARLIC’s performance, a comparison of the quadrature methods for solution of the path integral is provided.

Item URL in elib:https://elib.dlr.de/83165/
Document Type:Article
Title:GARLIC - A General Purpose Atmospheric Radiative Transfer Line-by-Line Infrared Code: Implementation and Evaluation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schreier, Franzfranz.schreier (at) dlr.deUNSPECIFIED
Gimeno Garcia, SebastianSebastian.GimenoGarcia (at) dlr.deUNSPECIFIED
Hedelt, Pascalpascal.hedelt (at) dlr.deUNSPECIFIED
Hess, Michaelmichael.hess (at) dlr.deUNSPECIFIED
Mendrok, JanaLulea University, Kiruna, SwedenUNSPECIFIED
Vasquez, Maytemayte.vazquez (at) dlr.deUNSPECIFIED
Xu, Jianjian.xu (at) dlr.deUNSPECIFIED
Date:April 2014
Journal or Publication Title:Journal of Quantitative Spectroscopy and Radiative Transfer
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.jqsrt.2013.11.018
Page Range:pp. 29-50
EditorsEmailEditor's ORCID iD
Mengüç, M. PinarÖzyeğin University, Istanbul, TurkeyUNSPECIFIED
Rothman, Laurence S.Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts, USAUNSPECIFIED
Mishchenko, Michael I.NASA-Goddard Institute for Space Studies, New York, USAUNSPECIFIED
Keywords:Radiative Transfer, Infrared, Microwave, Molecular absorption, Line–by–line
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Entwicklung von Atmosphärenprozessoren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Schreier, Dr.rer.nat. Franz
Deposited On:05 Jul 2013 14:40
Last Modified:06 Sep 2019 15:28

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