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-11-1537-2018

Cited by 140 publications

(112 citation statements)

References 90 publications

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“…The primary definition of a SSW event provided by the World Meteorological Organization requires a stratosphere temperature increase and an accompanying zonal wind reversal to easterlies at the 10 hPa pressure level (approximately 30 km altitude) and 60 • latitude (WMO, 1978). This definition was broadened and detailed in recent papers (Butler et al, 2015;Butler and Gerber, 2018;Rao et al, 2019). The summarizing paper, where a SSW database is described, was published in Butler et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Wang¹,

Shulga²,

Milinevsky³

et al. 2019

Atmos. Chem. Phys.

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The impact of a major sudden stratospheric warming (SSW) in the Arctic in February 2018 on the midlatitude mesosphere is investigated by performing the microwave radiometer measurements of carbon monoxide (CO) and zonal wind above Kharkiv, Ukraine (50.0 • N, 36.3 • E). The mesospheric peculiarities of this SSW event were observed using a recently designed and installed microwave radiometer in eastern Europe for the first time. Data from the ERA-Interim and MERRA-2 reanalyses, as well as the Aura microwave limb sounder measurements, are also used. Microwave observations of the daily CO profiles in January-March 2018 allowed for the retrieval of mesospheric zonal wind at 70-85 km (below the winter mesopause) over the Kharkiv site. Reversal of the mesospheric westerly from about 10 m s −1 to an easterly wind of about −10 m s −1 around 10 February was observed. The local microwave observations at our Northern Hemisphere (NH) midlatitude site combined with reanalysis data show wide-ranging daily variability in CO, zonal wind, and temperature in the mesosphere and stratosphere during the SSW of 2018. The observed local CO variability can be explained mainly by horizontal air mass redistribution due to planetary wave activity. Replacement of the CO-rich polar vortex air by CO-poor air of the surrounding area led to a significant mesospheric CO decrease over the station during the SSW and fragmentation of the vortex over the station at the SSW start caused enhanced stratospheric CO at about 30 km. The results of microwave measurements of CO and zonal wind in the midlatitude mesosphere at 70-85 km altitudes, which still are not adequately covered by ground-based observations, are useful for improving our understanding of the SSW impacts in this region.

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Section: Introductionmentioning

confidence: 99%

Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Wang¹,

Shulga²,

Milinevsky³

et al. 2019

Atmos. Chem. Phys.

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“…ARTS is a line‐by‐line RT model for thermal radiation originally developed to perform accurate simulations for the microwave region (Buehler et al, ; Eriksson et al, ). It can process fully polarized RT calculations with and without scattering in 1‐D and 3‐D atmospheres.…”

Section: Rt Modelsmentioning

confidence: 99%

Performance of Radiative Transfer Models in the Microwave Region

et al. 2020

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We compared two fast radiative transfer models, Community Radiative Transfer Model (CRTM) and Radiative Transfer for TIROS Operational Vertical Sounder (RTTOV), with the LBL model Atmospheric Radiative Transfer Simulator (ARTS). We used the measurements from Advanced Technology Microwave Sounder (ATMS) and the Global Precipitation Measurement Microwave Imager (GMI) for evaluation of the radiative transfer models. The models in comparison with the observations and each other performed very well with a mean difference less than 0.5 K for the temperature sounding channels operating near the oxygen absorption band at 60 GHz. There was a difference of up to 1 K among the models as well as compared with the observations for humidity sounding channels operating around water vapor absorption line at 183 GHz. The mean difference between the simulations and observations was up to 6 K for surface sensitive channels. Water vapor and surface sensitive channels also showed to be more sensitive than the temperature sounding channels to the spectroscopy models used to calculate the absorption coefficients. There was a small difference, less than 0.1 K, between brightness temperatures calculated using traditional boxcar and actual Sensor or Spectral Response Functions, except for a difference of 0.25 K for ATMS Channel 6. Double difference technique showed about 1 K difference between water vapor channels from ATMS instruments onboard N20 and National Polar‐orbiting Partnership (NPP). However, comparison of a new version of ATMS/NPP observations recently generated using an enhanced calibration algorithm with ATMS/N20 observations showed that the differences between the two instruments are less than 0.5 K after improving the ATMS/NPP calibration.

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“…ARTS version 2.2 (Buehler et al, ), the planetary toolbox has been used to simulate the brightness temperatures for the limb viewing radiometer on the orbiter. ARTS version 2.2, the planetary toolbox has been developed with the main goal of simulating the brightness temperatures for various planets at a range of frequencies (upto 3 THz).…”

Section: Radiative Transfer Equation Model For Venusmentioning

confidence: 99%

Millimeter‐Wave Radiometric Information Content Analysis for Venus Atmospheric Constituents

et al. 2020

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Various gaseous constituents present in Venus atmosphere have been detected and measured using in situ and remote sensing instruments. However, the measurements of mesospheric constituents above the cloud level are still scarce and inadequate. This is because constituents above the cloud level have a low abundance and a high level of variability. However, millimeter and submillimeter (mm and sub‐mm) frequencies can be used for Venus mesosphere measurements during prolonged Venusian day and night because several minor species in the upper atmosphere have emission/absorption bands in these frequencies owing to the rotational transitions. This study presents brightness temperatures and the corresponding sensitivity at the mm and sub‐mm wave frequencies for a limb sounding radiometer. This will be useful in potential payload design, that is, instrument design, frequency, bandwidth selection, and satellite altitude as well as pointing accuracy determination for measurement above Venus clouds. For this study, a simulation based experiment has been performed and presented to determine the mm and sub‐mm wave frequencies, optimum for estimation of concentration of water vapor, CO, CO2, SO2, HDO, and HCl present in the mesosphere. The simulations have been performed using a radiative transfer model called Atmospheric Radiative Transfer Simulator. The mm and sub‐mm wave measurement frequencies have been determined for both day and night time of Venus. It has been determined that 183, 380, 448, and 556 GHz frequencies are most suitable for water vapor measurements, 115, 230, and 345 GHz are optimum for CO measurements, and 600, 621, and 690 GHz frequency measurements are sensitive for HCl detection.

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ARTS, the Atmospheric Radiative Transfer Simulator – version 2.2, the planetary toolbox edition

Cited by 140 publications

References 90 publications

Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Performance of Radiative Transfer Models in the Microwave Region

Millimeter‐Wave Radiometric Information Content Analysis for Venus Atmospheric Constituents

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