BibTeX
@ARTICLE{
         Schreier2014GAG,
       author = "F. Schreier and S. {Gimeno Garcia} and P. Hedelt and M. Hess and J. Mendrok and M.
         Vasquez and J. Xu",
       title = "{GARLIC} - A General Purpose Atmospheric Radiative Transfer Line-by-Line
         Infrared-Microwave Code: Implementation and Evaluation",
       journal = "J. Quant. Spectrosc. and Radiat. Transfer",
       volume = "137",
       pages = "29-50",
       doi = "http://dx.doi.org/10.1016/j.jqsrt.2013.11.018",
       abstract = "A suite of programs for high resolution infrared-microwave 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 implemen- ted 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. Verification and validation are demonstrated using intercomparisons with other
         line-by-line codes and comparisons of synthetic spectra with spectra observed on Earth and from
         Venus.",
       ad_tools = "TAPENADE",
       ad_area = "Physics, Atmospheric radiative transfer",
       year = "2014"
}