Tentative identification of the 780‐cm−1 ν4 band Q branch of chlorine nitrate in high‐resolution solar absorption spectra of the stratosphere

Absorption by the Q branch of the ν4 band Of CIONO2 at 780.2 cm−1 has been tentatively identified in a series of 0.02-cm−1-resolution balloon-borne solar absorption spectra of the stratosphere. The spectral data were recorded at sunset from a float altitude of 33.5 km during a balloon flight from Holloman Air Force Base (32.8°N, 106.0°W) near Alamogordo, New Mexico, on March 23, 1981. A preliminary CIONO2 vertical profile has been determined from the stratospheric spectra by using the technique of nonlinear least squares spectral curve fitting and new spectroscopic parameters deduced from high-resolution laboratory spectra of CIONO2 and O3.

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