The visible absorption spectrum of NO3measured by high-resolution Fourier transform spectroscopy: VISIBLE ABSORPTION SPECTRUM OF NO3

[1] The visible absorption spectrum of the nitrate radical NO3 has been measured using high-resolution Fourier transform spectroscopy. The spectrum was recorded at 294 K using a resolution of 0.6 cm−1 (corresponding to 0.026 nm at 662 nm) and covers the 12600–21500 cm−1 region (465–794 nm). Compared to absorption spectra of NO3 recorded previously, the new data show improvements concerning absolute wavelength calibration (uncertainty 0.02 cm−1), and spectral resolution. A new interpretation and model of the temperature dependence of the strong (0-0) band around 662 nm are proposed. The results are important for long-path tropospheric absorption measurements of NO3 and optical remote sensing of the Earth's atmosphere from space.

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