Investigating the atmospheric composition from the 1950s on using historical solar absorption infrared spectra

• Applicants: Professor Dr. Justus Notholt; Dr. Mathias Palm
• Subject Area: Atmospheric Science
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 421869546

• Final Report Year: 2024

Final Report Abstract

As part of the project, Jamal Makkor was employed to work on his doctorate on this topic. Due to delays in digitizing the spectra, the project and the PhD is not yet finished. The results are very promising, three publications are planned, the first will be submitted soon. The topics of the publications are (i) Digitization of historical spectra from 1950 (ii) Global increase of CFC12 from 1951 until today and comparison with model calculations (iii) Variability of CO since 1950 and comparison with model calculations. The work on (i) has been presented as a poster at EGU2024 conference.

Publications

• Digitization and use of historical spectra from 1950/51 for the retrieval of various trace gases from the Jungfraujoch site (46.55N, 7.98E, 3580m).
  Makkor, Jamal; Palm, Mathias; Buschmann, Matthias; Mahieu, Emannuel; Chipperfield, Martyn & Notholt, Justus