Statistics – Applications
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confemj08j&link_type=abstract
"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec
Statistics
Applications
Atmospheric Species And Processes
Scientific paper
The goal of this study was to achieve absolute line intensities and reliable line broadening parameters for the strong 5.7 μm and 3.6 μm bands of formaldehyde (H_2CO) and to generate, for both spectral regions, a complete linelist for atmospheric applications.
High-resolution Fourier transform spectra were recorded at LADIR for the whole 1600 - 3200 cm-1 spectral range and for different path-length-pressure products conditions. Using these spectra, a large set of H_2CO individual line intensities and of self- and N_2-broadening linewidths were measured.
The calculated band intensities derived for the
5.7 μm and 3.6 μm bands are in excellent agreement with the values achieved recently by medium resolution band intensity measurements. It has to be mentioned that intensities in the 3.6 μm achieved in this work are, on the average, about 28 % stronger than those quoted in the HITRAN 2004 database. The linelist of positions and intensities based on this worka has been included in the HITRAN 2008 database.
Concerning the linewidths, empirical expansions and theoretical calculations (semi-classical Robert-Bonamy formalism) have been performed and compared to the measurements. Rotational dependences have been studied, and the temperature dependence of the N_2-broadening coefficients has been calculated.
A. Perrin, D. Jacquemart, F. Kwabia-Tchana, and N. Lacome, JQSRT 110,700-716,2009.
D. Jacquemart, A. Laraia F. Kwabia-Tchana, R.R. Gamache A. Perrin and N. Lacome, JQSRT in press.
Gamache Robert R.
Jacquemart D.
Kwabia Tchana F.
Lacome N.
Laraia A.
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