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Who is using Brewers

The Brewer was originally designed for the automated measurement of Ozone as part of the Global Atmosphere Watch (GAW) programme of the World Meteorological Organisation (WMO). There is a network of instruments around the world, from deserts to the Antarctic, providing information to the World Ozone and Ultraviolet Radiation Data Centre (WOUDC), which is operated by Environment Canada and located in Toronto.

WMO and GAW logo

The Kipp & Zonen Brewer MkIII Spectrophotometer is the only instrument in current production sanctioned by the World Meteorological Organisation (WMO) for making Total Ozone Column measurements.

However, the superior capability of the MkIII Brewer to make high resolution spectral scans in the ultraviolet (UV) region of solar radiation means that many Brewers are now purchased for research into the effects of UV radiation from the sun and sky. The UV region covers the wavelength ranges 100-280 nm (UVC), 280-315 nm (UVB) and 315-400 nm (UVA). Almost all UVC, and approximately 90% of UVB, from the sun is absorbed by the Earth’s atmosphere. UVA radiation at the surface is normally 15-20 times greater than UVB.

The Brewer MkIII can accurately match the ISO 17166:1999 / CIE S 007/E-1998 Erythemal (sunburn) action spectrum of the human skin. This UVE response function must be used to calculate the Global Solar UV Index (UVI) for public health information.

Most accurate measurement of solar UV radiation

There is a steady demand for new Brewers within the scientific community involved with meteorology, climatology, atmospheric science and ultraviolet radiation research.

The Brewer MkIII is the most accurate instrument currently available for the outdoor, all-weather, continuous spectral measurement of solar UV radiation and is an ideal reference instrument for networks of broadband (non-spectral) UV radiometers and for scientific research.

The Brewer Mk III provides high accuracy measurements of UVA, UVB, UVE, UV Index, Total Ozone Column and an estimate of Sulphur Dioxide. Some aerosol properties can also be derived from the data.

Reasons for a Brewer purchase are

  • To expand an existing Ozone and /or UV network
  • For a specific project, such as the International Polar Year
  • To replace older MkII and MkIV instruments by the higher performance MkIII for improved UV monitoring or for better measurements at high latitudes
  • Organisations without a Brewer wishing to join the global network
  • For research into solar ultraviolet (UV) radiation and its effects

Typical Brewer users are scientists and researchers with substantial experience in maintaining instrumentation and processing data.