Preprints
https://doi.org/10.5194/essd-2021-39
https://doi.org/10.5194/essd-2021-39

  22 Feb 2021

22 Feb 2021

Review status: this preprint is currently under review for the journal ESSD.

Total column ozone measurements by the Dobson spectrophotometer at Belsk (Poland) for the period 1963–2019: homogenization and adjustment to the Brewer spectrophotometer

Janusz W. Krzyścin, Bonawentura Rajewska-Więch, and Janusz Jarosławski Janusz W. Krzyścin et al.
  • Institute of Geophysics, Polish Academy of Science, Warsaw, 01-452, Poland

Abstract. The total column ozone (TCO3) measurements by the Dobson spectrophotometer #84 have been carried out at Belsk (51°50', 20°47'), Poland, since March 23, 1963. In total, ~115,000 intra-day manual observations have been taken up to December 31, 2019. These observations were made for various combinations of double wavelength pairs in UV range (AD, CD) and the observation category, i.e., direct Sun, zenith blue, and zenith cloudy depending on the weather conditions. The long-term stability of the instrument was supported by frequent (~almost every 4 yr.) intercomparisons with the world standard spectrophotometers. Trend analyses, based on the monthly and yearly averaged TCO3, can be carried out without any additional corrections to the intraday values. To adjust this data to the Brewer spectrophotometer observations also performed at Belsk, a procedure is proposed to account for: less accurate Dobson observations under low solar elevation, presence of clouds, and sensitivity of the ozone absorption on temperature. The adjusted time series shows that the Brewer-Dobson monthly averaged differences are in the range of about ±0.5 %. The intra-day TCO3 data base, divided into three periods (1963–1979, 1980–1999, and 2000–2019), is freely available at https://doi.pangaea.de/10.1594/PANGAEA.919378 (Rajewska-Więch et al., 2020).

Janusz W. Krzyścin et al.

Status: open (until 05 Jul 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-39', Anonymous Referee #1, 14 Mar 2021 reply
  • RC2: 'Comment on essd-2021-39', Anonymous Referee #2, 16 Jun 2021 reply

Janusz W. Krzyścin et al.

Janusz W. Krzyścin et al.

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