Measurements of trace stratospheric molecules using far infrared and mid infrared thermal emission spectroscopy

K. V. Chance

doi:10.1117/12.2297731

1 October 1991 Measurements of trace stratospheric molecules using far infrared and mid infrared thermal emission spectroscopy

K. V. Chance

Author Affiliations +

Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15760I (1991) https://doi.org/10.1117/12.2297731
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

Far infrared emission spectroscopy is a powerful technique for the measurement of a number of molecules that are important in stratospheric (i.e., ozone layer) chemistry. The technique is particularly applicable to polar molecules with large, hydrogenic rotational constants [Chance et al., 1985]. These molecules include diatomics (HCl, HF, HBr, and OH), and nearly symmetric prolate molecules with large perpendicular components of their dipole moments (HOCl, H₂O₂, and HO₂). They have strong rotational spectra in the far infrared that persist to sufficiently high energy (80 cm^-1 and above) that their spectra do not suffer great interference from the rotational lines of H₂O and O₃ which dominate the far infrared atmospheric spectrum. Thus, this type of molecule can be measured with great sensitivity from about 80 to 200 cm^-1.

Citation Download Citation

K. V. Chance "Measurements of trace stratospheric molecules using far infrared and mid infrared thermal emission spectroscopy", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15760I (1 October 1991); https://doi.org/10.1117/12.2297731

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