Technical note: The libRadtran software package for radiative transfer calculations - description and examples of use

Mayer, Bernhard; Kylling, Arve

doi:10.5194/acp-5-1855-2005

Cited by 1,430 publications

(1,151 citation statements)

References 95 publications

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“…The angres tool combined with output from uvspec have been successfully compared against measurements for leveled and extremely tilted (90 • ) sensors by Mayer and Kylling (2005, Fig. 13).…”

Section: Tilt Calculationmentioning

confidence: 99%

“…The libradtran radiative transfer model has been compared and validated against both other models and measurements. A summary of these are given in Mayer and Kylling (2005).…”

Section: Radiative Transfer Modelmentioning

confidence: 99%

“…The uvspec program from the libradtran software package (Mayer and Kylling, 2005;Emde et al, 2015) was used to simulate the radiance L(θ, φ). Trace gas concentrations were taken from the subarctic summer atmospheric profile (Anderson et al, 1986).…”

Section: Radiative Transfer Modelmentioning

confidence: 99%

“…Error sources such as shading of the surface by the sensor setup, slope of the surface, accurate calibration of the sensors, and characterization of the sensor's angular response function are commonly recognized and addressed (e.g., Grenfell et al, 1994;Perovich et al, 2002;Gardner and Sharp, 2010;Nicolaus et al, 2010). The error due to tilting of the sensor is rarely discussed.…”

Section: Introductionmentioning

confidence: 99%

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Tilt error in cryospheric surface radiation measurements at high latitudes: a model study

2016

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Abstract. We have evaluated the magnitude and makeup of error in cryospheric radiation observations due to small sensor misalignment in in situ measurements of solar irradiance. This error is examined through simulation of diffuse and direct irradiance arriving at a detector with a cosine-response fore optic. Emphasis is placed on assessing total error over the solar shortwave spectrum from 250 to 4500 nm, as well as supporting investigation over other relevant shortwave spectral ranges. The total measurement error introduced by sensor tilt is dominated by the direct component. For a typical highlatitude albedo measurement with a solar zenith angle of 60 • , a sensor tilted by 1, 3, and 5 • can, respectively introduce up to 2.7, 8.1, and 13.5 % error into the measured irradiance and similar errors in the derived albedo. Depending on the daily range of solar azimuth and zenith angles, significant measurement error can persist also in integrated daily irradiance and albedo. Simulations including a cloud layer demonstrate decreasing tilt error with increasing cloud optical depth.

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Section: Tilt Calculationmentioning

confidence: 99%

“…The libradtran radiative transfer model has been compared and validated against both other models and measurements. A summary of these are given in Mayer and Kylling (2005).…”

Section: Radiative Transfer Modelmentioning

confidence: 99%

Section: Radiative Transfer Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tilt error in cryospheric surface radiation measurements at high latitudes: a model study

2016

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“…The method for retrieving the solar surface irradiance employed by CM SAF is based on the libRadtran radiative transfer model (RTM) [22] in combination with a new approach of several parameterizations and eigenvector look-up tables (LUT). A LUT is a data structure with discrete pre-computed RTM results for a variety of atmospheric and surface states.…”

mentioning

confidence: 99%

Comparative assessment of global irradiation from a satellite estimate model (CM SAF) and on-ground measurements (SIAR): A Spanish case study

Antoñanzas-Torres

Cañizares²,

David

2013

Renewable and Sustainable Energy Reviews

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An analysis and comparison of daily and yearly solar irradiation from the satellite CM SAF database and a set of 301 stations from the Spanish SIAR network is performed using data of 2010 and 2011. This analysis is completed with the comparison of the estimations of effective irradiation incident on three different tilted planes (fixed, two axis tracking, north-south horizontal axis) using irradiation from these two data sources. Finally, a new map of yearly values of irradiation both on the horizontal plane and on inclined planes is produced mixing both sources with geostatistical techniques (kriging with external drift, KED)The Mean Absolute Difference (MAD) between CM SAF and SIAR is approximately 4% for the irradiation on the horizontal plane and is comprised between 5% and 6% for the irradiation incident on the inclined planes. The MAD between KED and SIAR, and KED and CM SAF is approximately 3% for the irradiation on the horizontal plane and is comprised between 3% and 4% for the irradiation incident on the inclined planes.The methods have been implemented using free software, available as supplementary material, and the data sources are freely available without restrictions.

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The UV and visible spectra of chlorine peroxide: Constraining the atmospheric photolysis rate

Young

Jones

Pope

2014

Geophysical Research Letters

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The photolysis of chlorine peroxide (ClOOCl) is a key chemical step in the depletion of polar stratospheric ozone. As such, precise measurements of the absorption cross sections for ClOOCl are required. In this paper we provide two critical pieces of laboratory data with which to constrain the rate of ozone depletion. First, we provide an optically pure ClOOCl spectrum in the photolytically important UV wavelength region (200-350 nm). Second, we provide the first ever measurement of the ClOOCl spectrum in the visible region (509-536 nm) conclusively demonstrating the photolysis of ClOOCl to be negligible in this spectral region. The visible measurement is important because it can be used to anchor other previously recorded UV spectra and hence reduce the uncertainty in the ClOOCl photolysis rate. The calculated photolysis rate from this study indicates that the current models of stratospheric ozone depletion are correct.

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Technical note: The libRadtran software package for radiative transfer calculations - description and examples of use

Cited by 1,430 publications

References 95 publications

Tilt error in cryospheric surface radiation measurements at high latitudes: a model study

Tilt error in cryospheric surface radiation measurements at high latitudes: a model study

Comparative assessment of global irradiation from a satellite estimate model (CM SAF) and on-ground measurements (SIAR): A Spanish case study

The UV and visible spectra of chlorine peroxide: Constraining the atmospheric photolysis rate

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