Moon as infrared light source for the monitoring of stratospheric trace gas concentration during the polar night

Justus Notholt; Otto Schrems

doi:10.1117/12.166746

31 January 1994 Moon as infrared light source for the monitoring of stratospheric trace gas concentration during the polar night

Justus Notholt, Otto Schrems

Author Affiliations +

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166746
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

In winter 1992/93 we performed ground-based FTIR measurements in the Arctic (79 degree(s)N, 12 degree(s)E) to derive the column densities of several trace gases in the stratosphere. For the first time the moon was used as an infrared light source during the polar night. Due to the absorption of sunlight by the moon, the moon acts as an infrared emitter itself in the wavenumber region up to 1000 cm^-1. This allows us to use the MCT detector for the wavenumber region 700 - 1000 cm^-1 in addition to the InSb detector covering 2000 - 4000 cm^-1. Spectra could be recorded at 0.01 cm^-1 or 0.02 cm^-1 resolution. In a first step column densities of N₂O, CH₄, HF, HCl, O₃, NO₂, HNO₃ and ClONO₂ have been obtained.

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Justus Notholt and Otto Schrems "Moon as infrared light source for the monitoring of stratospheric trace gas concentration during the polar night", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166746

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