A Monte Carlo simulation of radiative transfer in the atmosphere applied to ToTaL-DOAS

Premuda, Margherita; Masieri, Samuele; Bortoli, Daniele; Margelli, Federico; Ravegnani, F.; Petritoli, A.; Kostadinov, I.; Giovanelli, G.; Cupini, E.

doi:10.1117/12.830073

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…Fig. 9 shows a comparison of the simulation results with measurements obtained from the DOAS spectrometer TropoGAS (Tropospheric Gas Analyzer Spectrometer) working, in this case, in a horizontal-view configuration at a distance of 1 Km from a house (Premuda et al, 2009). Data obtained from passive measurements by means of the simulation show a very good agreement with the simultaneous active measurements used as a reference for the comparison.…”

Section: Doas Systemssupporting

confidence: 50%

“…This allows one to take into account various ground altitudes and atmospheric profiles for each region, thus allowing for soil orography and latitudinal and longitudinal variations in the composition of the atmosphere. This is also possible with MOCRA and has been used to simulate the presence of an obstacle in horizontal passive DOAS measurements (Premuda et al, 2009). When several kinds of atmosphere have to be simultaneously taken into account in the same calculation, as may occur, for instance, in general 3-D geometries, the data belonging to each of them must obviously be available in the library.…”

Section: A) the Atmospheric Environmentmentioning

confidence: 99%

“…Unaltered corresponding histories in the two calculations will give in this way the same results for the same quantity. This device is envisaged both in MOCRA and in PREMAR (Premuda et al, 2009;Cupini et al, 2001). …”

Section: B) Photon History Trackingmentioning

confidence: 99%

“…In the simulation of radiation transport through the atmosphere the phenomenon of refraction has to be taken into account as a consequence of different refractive index values between contiguous geometrical shells. This phenomenon can be remarkable, for instance, in the case of vertical view detectors receiving solar radiation at solar zenith angles near to or greater than 90° (horizon) as can be seen in Figure 2, where a plot of a sun ray, obtained using the MOCRA (MOnte Carlo Radiance Analysis) code for a 93° solar zenith angle (Premuda et al, 2009) is shown. This phenomenon is taken into account according to Snell's refraction law sin sin ir r i nn ϑ ϑ = , where i n and r n are the average refractive indices of the two contiguous regions involved and i ϑ and r ϑ are the incident and refracted angles with respect to the normal to the boundary surface, respectively.…”

mentioning

confidence: 99%

“…In this case RTMs are required to compute the Equivalent Path Length (EPL), i.e. the distance of a fictitious radiation source giving the same signal collected by the detector (Premuda et al, 2009). For the simulation of radiometer or DOAS devices, a reference system O(x,y,z) can be assumed with its origin at the Earth's centre and the z-axis normal to ground surface.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Monte Carlo Simulation of Radiative Transfer in Atmospheric Environments for Problems Arising from Remote Sensing Measurements

Premuda¹

2011

Applications of Monte Carlo Method in Science and Engineering

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Section: Doas Systemssupporting

confidence: 50%

Section: A) the Atmospheric Environmentmentioning

confidence: 99%

Section: B) Photon History Trackingmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Monte Carlo Simulation of Radiative Transfer in Atmospheric Environments for Problems Arising from Remote Sensing Measurements

Premuda¹

2011

Applications of Monte Carlo Method in Science and Engineering

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Differential Optical Absorption Spectroscopy

Platt¹,

Stutz²

2008

Physics of Earth and Space Environments

209

185

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To cite this version:P. Spietz, J. Gómez Martín, J. P. Burrows. Effects of column density on I2 spectroscopy and a determination of I2 absorption cross section at 500 nm. Atmospheric Chemistry and Physics, European Geosciences Union, 2006, 6 (8), pp.2177-2191. Atmos. Chem. Phys., 6, 2177-2191, 2006 www.atmos-chem-phys.net/6/2177/2006 Abstract. The use of ro-vibronic spectra of I 2 in the region of 543 nm to 578 nm as reference spectra for atmospheric Differential Optical Absorption Spectroscopy is studied. It is shown that the retrieval of atmospheric column densities with Differential Optical Absorption Spectroscopy set-ups at FWHM at and above 1 nm depends critically on the column density, under which the used reference spectrum was recorded. Systematic overestimation of the comparatively low atmospheric column density of I 2 of the order of 13% is possible. Under low pressure conditions relevant in laboratory studies, the systematic deviations may grow up to 45%. To avoid such effects with respect to field measurements, new reference spectra of I 2 were determined under column density of the order of 10 16 cm −2 close to that expected for an atmospheric measurement. Two typical configurations of Differential Optical Absorption Spectroscopy, which use grating spectrometers, were chosen for the spectroscopic set-up. One spectrum was recorded at similar resolution (0.25 nm FWHM) but finer binning (0.035 nm/pixel) than previously published data. For the other (0.59 nm FWHM, 0.154 nm/pixel) no previously published spectra exist. Wavelength calibration is accurate to ±0.04 nm and ±0.11 nm respectively. The absorption cross section for the recordings was determined under low column density with an accuracy of ±4% and ±3% respectively. The absolute absorption cross section of I 2 at 500 nm (wavelength: in standard air) in the continuum absorption region was determined using a method independent of iodine vapour pressure. Obtained was σ I 2 (500 nm)=(2.186±0.021)·10 −18 cm 2 in very good agreement with previously published results, but at 50% smaller uncertainty. From this and previously published results a weighted average of σ I 2 (500 nm)=(2.191±0.02)·10 −18 cm 2 is determined.

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OCCUR—Study of the Chemistry−Climate Coupling in the UTLS Region with Satellite Measurements

Papandrea

Carlotti

2013

SpringerBriefs in Earth System Sciences

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A Monte Carlo simulation of radiative transfer in the atmosphere applied to ToTaL-DOAS

Cited by 5 publications

References 15 publications

Monte Carlo Simulation of Radiative Transfer in Atmospheric Environments for Problems Arising from Remote Sensing Measurements

Monte Carlo Simulation of Radiative Transfer in Atmospheric Environments for Problems Arising from Remote Sensing Measurements

Differential Optical Absorption Spectroscopy

OCCUR—Study of the Chemistry−Climate Coupling in the UTLS Region with Satellite Measurements

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