ARTS, the atmospheric radiative transfer simulator – version 2.2,
the planetary toolbox edition

Buehler, Stefan A.; Mendrok, Jana; Eriksson, Patrick; Perrin, A.; Larsson, Richard; Hodnebrog, Øivind

doi:10.5194/gmd-2017-229

Cited by 27 publications

(37 citation statements)

References 40 publications

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“…We conduct a series of sensitivity analyses and retrievals for single‐layer, plane‐parallel cirrus clouds located between 9 and 11 km using look‐up tables (LUTs) calculated with a simulator called the Atmospheric Radiative Transfer Simulator (ARTS) (Buehler et al, 2018). The analyses are evaluated to characterize how particular wavelengths in the sub‐mm/mm and IR regimes (Table 1) are sensitive to IWPs and D eff s commonly calculated in vertically heterogeneous, optically thin cirrus clouds.…”

Section: Methodsmentioning

confidence: 99%

Sensitivity Analyses for the Retrievals of Ice Cloud Properties From Radiometric and Polarimetric Measurements in Sub‐mm/mm and Infrared Bands

et al. 2020

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Simulations of the radiometric and polarimetric properties of ice clouds based on the Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 6 ice cloud model (aggregates in conjunction with the gamma distribution) are performed at wavelengths in the Infrared (IR) and Submillimeter/Millimeter (sub‐mm/mm) regimes. The scattering/absorption/polarization properties from the precalculated database are incorporated into a radiative transfer model, the Atmospheric Radiative Transfer Model (ARTS). A number of sub‐mm/mm bands have been considered from radiometric and polarimetric studies for potential applications to retrieving ice cloud properties at shorter sub‐mm/mm wavelengths (higher frequencies). The IR atmospheric window has also been thoroughly investigated for its feasibility to observe ice clouds. However, in the literature there is a lack of studies utilizing these high frequency bands or polarimetric IR observations to infer ice cloud properties. This study focuses on performing simulations of ice clouds between 680 and 183 GHz (sub‐mm/mm regime) and between 8.6 and 12 μm wavelengths (IR‐window regime) toward determining potential applications to simultaneous retrievals of ice water path (IWP) and effective diameter (Deff) with a primary focus on optically thin cirrus clouds. IWP and Deff isoline plots (lookup tables) are created to conduct sensitivity analyses and to perform preliminary retrievals. Results reveal that the utilization of both sub‐mm/mm and IR wavelengths combined with linearly polarized and unpolarized measurements leads to the most accurate IWP and Deff retrievals with errors lower than 10%.

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Section: Methodsmentioning

confidence: 99%

Sensitivity Analyses for the Retrievals of Ice Cloud Properties From Radiometric and Polarimetric Measurements in Sub‐mm/mm and Infrared Bands

et al. 2020

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“…The water vapor perturbation is in fractional units (*1.1=10 % increase) and is normalized by the geometrical layer thickness in kilometers, so that numerical values roughly represent the change in brightness temperature for a doubling of the water vapor concentration in a 1 km thick layer. Calculations were performed with the Atmospheric Radiative Transfer Simulator (ARTS; Buehler et al, ), using the predefined setups for MHS and SEVIRI. For comparison, Jacobians for MHS Channel 4 (183 ± 3 GHz) and SEVIRI Channel 6 (7.3 μm) are also shown in gray.…”

Section: Matchup Proceduresmentioning

confidence: 99%

Opportunistic Constant Target Matching—A New Method for Satellite Intercalibration

Buehler

Prange

Mrziglod

et al. 2020

Earth and Space Science

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Opportunistic constant target matching is a new method for satellite intercalibration. It solves a long-standing issue with the traditional simultaneous nadir overpass (SNO) method, namely, that it typically provides only data points with cold brightness temperatures for humidity sounding instruments on sun-synchronous satellites. In the new method, a geostationary infrared sensor (SEVIRI) is used to select constant target matches for two different microwave sensors (MHS on NOAA 18 and Metop A). We discuss the main assumptions and limitations of the method and explore its statistical properties with a simple Monte Carlo simulation. The method was tested in a simple case study with real observations for this combination of satellites for MHS Channel 3 at 183 ± 1 GHz, the upper tropospheric humidity channel. For the studied 3-month test period, real observations are found to behave consistently with the simulations, increasing our confidence that the method can be a valuable tool for intercalibration efforts. For the selected case study, the new method confirms that the bias between NOAA 18 and Metop A MHS Channel 3 is very small, with absolute value below 0.05 K.

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“…ARTS is a publicly available radiative transfer code published under the GNU license agreement (see also http: //www.radiativetransfer.org/). It is an open-source project driven by the University of Hamburg, Germany and Chalmers University, Gothenburg, Sweden [17,18,31]. ARTS was originally developed for applications in the microwave range but is also suitable for applications in the mid-and far-infrared range [see e.g.…”

Section: Arts -Atmospheric Radiative Transfer Simulatormentioning

confidence: 99%

Intercomparison of three microwave/infrared high resolution line-by-line radiative transfer codes

Schreier

García

Milz

et al. 2018

Journal of Quantitative Spectroscopy and Radiative Transfer

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An intercomparison of three line-by-line (lbl) codes developed independently for atmospheric radiative transfer and remote sensing -ARTS, GARLIC, and KOPRA -has been performed for a thermal infrared nadir sounding application assuming a HIRS-like (High resolution Infrared Radiation Sounder) setup. Radiances for the 19 HIRS infrared channels and a set of 42 atmospheric profiles from the "Garand dataset" have been computed.The mutual differences of the equivalent brightness temperatures are presented and possible causes of disagreement are discussed. In particular, the impact of path integration schemes and atmospheric layer discretization is assessed. When the continuum absorption contribution is ignored because of the different implementations, residuals are generally in the sub-Kelvin range and smaller than 0.1 K for some window channels (and all atmospheric models and lbl codes). None of the three codes turned out to be perfect for all channels and atmospheres. Remaining discrepancies are attributed to different lbl optimization techniques. Lbl codes seem to have reached a maturity in the implementation of radiative transfer that the choice of the underlying physical models (line shape models, continua etc) becomes increasingly relevant.

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ARTS, the atmospheric radiative transfer simulator – version 2.2, the planetary toolbox edition

Cited by 27 publications

References 40 publications

Sensitivity Analyses for the Retrievals of Ice Cloud Properties From Radiometric and Polarimetric Measurements in Sub‐mm/mm and Infrared Bands

Sensitivity Analyses for the Retrievals of Ice Cloud Properties From Radiometric and Polarimetric Measurements in Sub‐mm/mm and Infrared Bands

Opportunistic Constant Target Matching—A New Method for Satellite Intercalibration

Intercomparison of three microwave/infrared high resolution line-by-line radiative transfer codes

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