Articles | Volume 18, issue 5
https://doi.org/10.5194/amt-18-1105-2025
https://doi.org/10.5194/amt-18-1105-2025
Research article
 | 
04 Mar 2025
Research article |  | 04 Mar 2025

Digitization and calibration of historical solar absorption infrared spectra from the Jungfraujoch site

Jamal Makkor, Mathias Palm, Matthias Buschmann, Emmanuel Mahieu, Martyn P. Chipperfield, and Justus Notholt

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During the years 1950 and 1951, Marcel Migeotte took regular solar measurements in the form of paper rolls at the Jungfraujoch site. These historical spectra proved to be valuable for atmospheric research and needed to be saved for posterity. Therefore, a digitization method which used image-processing techniques was developed to extract them from the historical paper rolls. This allowed them to be saved in a machine-readable format that is easily accessible to the scientific community.
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