Composition and Chemistry
Measurements of historical total ozone from the Chalonge-Divan stellar spectrum program: A reanalysis of the 1953–1972 data and a comparison with simultaneous Dobson Arosa measurements
Article first published online: 22 JUN 2006
Copyright 2006 by the American Geophysical Union.
Journal of Geophysical Research: Atmospheres (1984–2012)
Volume 111, Issue D12, 27 June 2006
How to Cite
2006), Measurements of historical total ozone from the Chalonge-Divan stellar spectrum program: A reanalysis of the 1953–1972 data and a comparison with simultaneous Dobson Arosa measurements, J. Geophys. Res., 111, D12309, doi:10.1029/2005JD006476., , and (
- Issue published online: 22 JUN 2006
- Article first published online: 22 JUN 2006
- Manuscript Accepted: 1 MAR 2006
- Manuscript Revised: 31 JAN 2006
- Manuscript Received: 15 JUL 2005
- ozone columns;
- stellar astronomy
 We report new determinations of total ozone obtained by reanalyzing a unique set of astronomical observations that were made in the mid-20th century at observatories in France (Haute-Provence) and Switzerland (Jungfraujoch) for the purpose of calculating nightly atmospheric extinction coefficients in the UV (Rayleigh scattering and total ozone) as part of a program to measure absolute stellar fluxes. Only a small fraction of the original ozone results, corresponding to data obtained during 1958–1959, are in the public domain at the World Ozone and Ultraviolet Data Centre; the rest were on handwritten sheets and were stored at Haute-Provence. Both astronomical sites are close enough geographically to Arosa (Switzerland) that the respective ozone values can be compared directly. The comparison reveals a generally very close resemblance, even down to the pattern of daily variations, with a correlation coefficient of 0.78, but an overall negative bias of 6–7% in the stellar results. The bias appears to be slightly larger prior to 1958.