Line-broadening and line-mixing effect in ν 3 band of CH 4 perturbed by He gas

2000 ◽  
Author(s):  
I. M. Grigor'ev ◽  
N. N. Filippov ◽  
M. V. Tonkov ◽  
T. Gabard ◽  
R. Le Doucen
Keyword(s):  
Line Broadening ◽  
Mixing Effect ◽  
Line Mixing

Line mixing and line broadening in CO2 bands perturbed by helium at 193 K

1996 ◽  
Vol 263 (6) ◽  
pp. 811-816 ◽  
Author(s):  
B. Khalil ◽  
O. Cisse ◽  
G. Moreau ◽  
F. Thibault ◽  
R. Le Doucen ◽  
...  
Keyword(s):  
Line Broadening ◽  
Line Mixing

Line mixing effect in the ν2 band of CH3Br

2017 ◽  
Vol 189 ◽  
pp. 351-360 ◽  
Author(s):  
F. Hmida ◽  
S. Galalou ◽  
F. Kwabia Tchana ◽  
M. Rotger ◽  
H. Aroui
Keyword(s):  
Mixing Effect ◽  
Line Mixing

Line mixing effect on the pure CO2 absorption in the region

2002 ◽  
Vol 72 (4) ◽  
pp. 315-325 ◽  
Author(s):  
N.N. Filippov ◽  
V.P. Ogibalov ◽  
M.V. Tonkov
Keyword(s):  
Co2 Absorption ◽  
Mixing Effect ◽  
Line Mixing

scholarly journals Uncertainty of atmospheric microwave absorption model: impact on ground-based radiometer simulations and retrievals

2018 ◽  
Author(s):  
Domenico Cimini ◽  
Philip W. Rosenkranz ◽  
Mikhail Yu Tretyakov ◽  
Maksim A. Koshelev ◽  
Filomena Romano
Keyword(s):  
Temperature Dependence ◽  
Spectroscopic Parameter ◽  
60 Ghz ◽  
Line Broadening ◽  
Frequency Range ◽  
Continuum Absorption ◽  
Spectroscopic Parameters ◽  
Line Mixing ◽  
The Impact ◽  
Uncertainty Contribution

Abstract. This paper presents a general approach to quantify the absorption model uncertainty due to uncertainty in underlying spectroscopic parameters. The approach is applied to radiative transfer calculations in the 20–60 GHz range, which is commonly exploited for atmospheric sounding by microwave radiometer (MWR). The approach however is not limited to any frequency range, observing geometry, or particular instrument. In the considered frequency range, relevant uncertainties come from water vapor and oxygen spectroscopic parameters. The uncertainty of the following parameters is found to dominate: (for water vapor) self and foreign continuum absorption coefficients, line broadening by dry air, line intensity, temperature-dependence exponent for foreign continuum absorption, and line shift-to-broadening ratio; (for oxygen) line intensity, line broadening by dry air, line mixing, temperature-dependence exponent for broadening, zero-frequency line broadening in air, temperature-dependence coefficient for line mixing. The full uncertainty covariance matrix is then computed for the set of spectroscopic parameters with significant impact. The impact of the spectroscopic parameter uncertainty covariance matrix on simulated downwelling microwave brightness temperatures (TB) in the 20–60 GHz range is calculated for six atmospheric climatology conditions. The uncertainty contribution to simulated TB ranges from 0.30 K (sub-Arctic winter) to 0.92 K (tropical) at 22.2 GHz, and from 2.73 K (tropical) to 3.31 K (sub-Arctic winter) at 52.28 GHz. The uncertainty contribution is nearly zero at 55–60 GHz frequencies. Finally, the impact of spectroscopic parameter uncertainty on ground-based MWR retrievals of temperature and humidity profiles is discussed.

Line-mixing effect on NH3 line intensities

2013 ◽  
Vol 130 ◽  
pp. 273-283 ◽  
Author(s):  
H. Aroui ◽  
K. Ben Mabrouk ◽  
R. Boussassi
Keyword(s):  
Mixing Effect ◽  
Line Intensities ◽  
Line Mixing

Modelling of the rotational relaxation matrix in line-mixing effect calculations

2004 ◽  
Vol 102 (16-17) ◽  
pp. 1843-1850 ◽  
Author(s):  
A. V. Domanskaya ◽  
N. N. Filippov ◽  
N. M. Grigorovich ◽  
M. V. Tonkov *
Keyword(s):  
Rotational Relaxation ◽  
Mixing Effect ◽  
Relaxation Matrix ◽  
Line Mixing
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