Stratospheric Trace Gas Measurements in the Near-UV and Visible Spectral Range with the Sun as a Light Source Using a Fourier Transform Spectrometer

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Spectra of the atmosphere have been measured in the near-UV and visible spectral range for the first time with a Fourier transform spectrometer using direct and zenith scattered sunlight. The observations were performed in the Arctic at 79°N, 12°E in 1994. Spectra were recorded in the wavelength range 310 to 1100 nm up to a resolution of about 0.0008 nm. The use of the FT spectrometer allowed the study of atmospheric trace gas concentrations in the whole spectral region between 500 and 31,000 cm-1 (0.3-20 μm) with one instrument by only changing the beamsplitters and choosing different detectors. At a spectral resolution of 1.2 nm, the atmospheric absorptions of O3 a around 505 nm and NO2 at 448 nm were analyzed. Results are compared with observations performed in the infrared with the same instrument, with TOMS data and with ozone balloon data.

Keywords: Atmospheric observations; FT UV-vis; Solar spectroscopy; Trace gases

Document Type: Research Article


Affiliations: 1: Alfred-Wegener-Institut für Polar und Meeresforschung, Forschungsstelle Potsdam, Postfach 600149, D-14401 Potsdam, Germany 2: Institut für Umweltphysik der Universität Heidelberg, Im Neuenheimer Feld 336, D-69120 Heidelberg, Germany

Publication date: May 1, 1996

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