Calculations of N2O-N2O, N2O-air line-broadening and shift coefficients in the 3ν1 + 4ν3 band
T.A. Nevzorova, A.S. Dudaryonok, N.N. Lavrentieva, L.N. Sinitsa
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: line profile parameters, line broadening, halfwidth, line shift, nitrous oxide
Abstract
Nitrous oxide ranks among the top five most significant greenhouse gases driving the global warming of the Earth's atmosphere. Furthermore, nitrous oxide acts as a depletor of stratospheric ozone. Therefore, the study of N2O broadening by atmospheric gases is of particular importance. This paper presents the calculated N2O line broadening and shift coefficients under N2O and air pressure, corresponding to vibrational-rotational transitions in the 3ν1 + 4ν3 band, at room temperature with the rotational quantum number | m | varying from 3 to 72. The calculations were performed using a semi-empiric method based on a semi-classical approach modified by introducing a correction factor into the calculation scheme. The N2O line self- and airbroadening coefficients are compared with published data; the vibrational dependence of the calculated values is examined. The results can be used for refining spectroscopic information in HITRAN database.
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