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EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Oxygen Compounds > Ozone

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  • Monthly averaged total ozone values measured at Halley station, Antarctica. All measurements are in Dobson Units. These monthly averages are a flat average of any daily average values that exist for each given month; the daily averages are a flat average of the measurements obtained during a particular 24-hour period (UTC). The number of observations may vary from day to day. The Dobson ozone observing season at Halley begins at the end of August and ends in mid April; however, very early and late season observations are made with the Sun at low elevation, and are less accurate than those made during the main observing period of September 6 to April 6. The values for 1956/57 (MacDowall, J., 1962) and 1957-1973 (Farman, J. C. and Hamilton, R. A., 1975) have been approximately corrected from the original using the WMO recommended guidance (Komhyr, W. D., Mateer C. L. and Hudson, R. D., 1993) for the Bass-Paur ozone absorption coefficients. Ozone values from 1973 onwards have been calculated using the Bass-Paur coefficients. The approximation of a US standard atmosphere, which will differ from the Antarctic atmosphere, has been used and the assumed temperature used for the absorption coefficients may be inaccurate.

  • The data are from a proof-of-concept study to assess the feasibility of accurately measuring ozone (O3) and hydroxyl (OH) profiles from the ground using accessible satellite TV receiver technology. The datasets include a synthesis of atmospheric model and a priori atmospheric datasets for selected polar locations, atmospheric transmittance spectra calculated for those locations, and O3 and OH profile retrieval results.

  • British Antarctic Survey ozone data consist of observations made at the following stations: Halley, Antarctica, from 1956; Faraday, Antarctica, from 1964 (Faraday/Vernadsky from 1996); King Edward Point, South Georgia, from 1971 (until 1982); Rothera, Antarctica, from 1996. Observations at all stations are recorded in UTC. All observations at Halley and Vernadsky are made with the Dobson ozone spectrophotometer and are seasonal (Apr to Aug). Datasets include daily mean and monthly ozone values. Observations for ozone and nitrogen dioxide are made at Rothera using the SAOZ instrument, which can make observations throughout the year. There is also a Bentham spectro-radiometer at Rothera, which can be used to compute ozone levels. Full metadata on collection, instrumentation and calibration are available on the BAS ozone webpages.

  • Surface ozone measurements taken using a 2B-Technologies (Model 202) ozone analyzer, at CASLab (the Clean Air Sector Laboratory), Halley Station, between 2004 and 2005. The dataset lists O3 mixing ratios at 1-minute averages of 10 second data. This work was carried out as part of the Chemistry of the Antarctic Boundary Layer and the Interface with Snow (CHABLIS) project (2001-2006).

  • Ozone (O3) and nitric oxide (NO) measurements were made using TEI instruments attached to the roof of the FAGE container. The dataset provides O3 and NO mixing ratios (ppbv) at one minute averaging periods. This work was carried out at Halley Station in 2005 as part of the Chemistry of the Antarctic Boundary Layer and the Interface with Snow (CHABLIS) project (2001-2006).