Experimental and simulated study of line-shape models for measuring spectroscopic parameters using the WM-DAS method — part I: Collisional broadening and absorption coefficients of H2O-Ar system

2020 ◽  
Vol 254 ◽  
pp. 107216 ◽  
Author(s):  
Jidong Li ◽  
Yanjun Du ◽  
Yanjun Ding ◽  
Zhimin Peng
Keyword(s):  
Line Shape ◽  
Absorption Coefficients ◽  
Spectroscopic Parameters ◽  
Collisional Broadening ◽  
Shape Models

scholarly journals Using a speed-dependent Voigt line shape to retrieve O<sub>2</sub> from Total Carbon Column Observing Network solar spectra to improve measurements of XCO<sub>2</sub>

2019 ◽  
Vol 12 (1) ◽  
pp. 35-50 ◽  
Author(s):  
Joseph Mendonca ◽  
Kimberly Strong ◽  
Debra Wunch ◽  
Geoffrey C. Toon ◽  
David A. Long ◽  
...  
Keyword(s):  
Line Shape ◽  
Near Infrared ◽  
Total Carbon ◽  
Absorption Coefficients ◽  
Line Shapes ◽  
Shape Models ◽  
Speed Dependence ◽  
Measured Absorption ◽  
The Difference ◽  
Carbon Dioxide Co2

Abstract. High-resolution, laboratory, absorption spectra of the a1Δg←X3Σg- oxygen (O2) band measured using cavity ring-down spectroscopy were fitted using the Voigt and speed-dependent Voigt line shapes. We found that the speed-dependent Voigt line shape was better able to model the measured absorption coefficients than the Voigt line shape. We used these line shape models to calculate absorption coefficients to retrieve atmospheric total columns abundances of O2 from ground-based spectra from four Fourier transform spectrometers that are a part of the Total Carbon Column Observing Network (TCCON). Lower O2 total columns were retrieved with the speed-dependent Voigt line shape, and the difference between the total columns retrieved using the Voigt and speed-dependent Voigt line shapes increased as a function of solar zenith angle. Previous work has shown that carbon dioxide (CO2) total columns are better retrieved using a speed-dependent Voigt line shape with line mixing. The column-averaged dry-air mole fraction of CO2 (XCO2) was calculated using the ratio between the columns of CO2 and O2 retrieved (from the same spectra) with both line shapes from measurements taken over a 1-year period at the four sites. The inclusion of speed dependence in the O2 retrievals significantly reduces the air mass dependence of XCO2, and the bias between the TCCON measurements and calibrated integrated aircraft profile measurements was reduced from 1 % to 0.4 %. These results suggest that speed dependence should be included in the forward model when fitting near-infrared CO2 and O2 spectra to improve the accuracy of XCO2 measurements.

First line shape analysis and spectroscopic parameters for the ν11 band of 12C2H4

2016 ◽  
Vol 184 ◽  
pp. 297-307 ◽  
Author(s):  
Et-touhami Es-sebbar ◽  
John Mantzaras ◽  
Yves Benilan ◽  
Aamir Farooq
Keyword(s):  
Shape Analysis ◽  
Line Shape ◽  
First Line ◽  
Spectroscopic Parameters ◽  
Line Shape Analysis

Line-shape models testing on six acetylene transitions in the ν1+ν3 band broadened by N2

2014 ◽  
Vol 140 ◽  
pp. 58-66 ◽  
Author(s):  
Robab Hashemi ◽  
Hoimonti Rozario ◽  
Chad Povey ◽  
Adriana Predoi-Cross
Keyword(s):  
Line Shape ◽  
Shape Models

Semi-classical line shape models of rovibrational H[sub 2]O spectra tested using frequency-stabilized cavity ring-down spectroscopy

2008 ◽  
Author(s):  
R. Ciuryło ◽  
D. Lisak ◽  
J. T. Hodges ◽  
Marco Antonio Gigosos ◽  
Manuel Ángel González
Keyword(s):  
Line Shape ◽  
Cavity Ring Down Spectroscopy ◽  
Shape Models ◽  
Cavity Ring Down

scholarly journals Dispersion and relativistic corrections to the spectral line-shape models

2017 ◽  
Vol 810 ◽  
pp. 012062
Author(s):  
S Wójtewicz ◽  
P Wcisło ◽  
P Amodio ◽  
L Gianfrani ◽  
D Lisak ◽  
...  
Keyword(s):  
Spectral Line ◽  
Line Shape ◽  
Spectral Line Shape ◽  
Relativistic Corrections ◽  
Shape Models
Sign in / Sign up

Export Citation Format

Share Document