High Resolution Vib-Rotational Analysis of the v}3 and v}4 Spectral Regions of Chlorine Nitrate

Published

December 1, 2002

Author(s)

J.- M. Flaud, J Orphal, Walter J. Lafferty, M Birk, G Wagner

Abstract

High resolution Fourier transform spectra of isotopically natural pure chlorine nitrate, CION0₂, were recorded with a resolution of 0.00094 cm^-1 at temperatures of 190 K and 297 K. An extensive vib-rotational analysis of theV₄ and V₃ fundamental bands as well as the hot band V₄+V₉-V₉ of the most abundant ³⁵Cl isotopomer was carriedout using the spectrum recorded at 190K. In addition, the cold bands of the lesser abundant ³⁷Cl isotopomer were partially assigned. Accurate upper state rotational Hamiltonian constants were derived. In particular the followingband centers were determined : VO(V₄) = 780.2152(4) cm^-1, VO(V₃) = 809.7504(4) cm^-1, VO(V₄+v₉-v₉) = 778.8686(4) cm-' for 778.7226(4) cm^-4 for ³⁵CIONO2 and V₀(V₄) = 778.8686(4)cm^-1 for 37 CION02. These constants were used to generate spectral parameters which permit a precise modelling of experimental cross sections of the V₄fundamental Q-branch of ³⁵ CION02 over the temperature range of 190-297K and air pressures up to 150 mbar. This Q-branch is used for atmospheric retrievals

Citation

Journal of Geophysical Research-Atmospheres

Volume

107

Issue

No. D24

Pub Type

Journals

Keywords

band intensity, chlorine, high-resolution spectrum, nitrate, NU4 band, stratospheric reservoir species

Citation

Flaud, J. , Orphal, J. , Lafferty, W. , Birk, M. and Wagner, G. (2002), High Resolution Vib-Rotational Analysis of the {v}₃ and {v}₄ Spectral Regions of Chlorine Nitrate, Journal of Geophysical Research-Atmospheres (Accessed November 5, 2025)