Adaption of an array spectroradiometer for total ozone column retrieval using direct solar irradiance measurements in the UV spectral range
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Published:2018-04-27
Issue:4
Volume:11
Page:2477-2484
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Zuber Ralf,Sperfeld Peter,Riechelmann Stefan,Nevas Saulius,Sildoja Meelis,Seckmeyer Gunther
Abstract
Abstract. A compact array spectroradiometer that enables precise and robust
measurements of solar UV spectral direct irradiance is presented. We
show that this instrument can retrieve total ozone column (TOC)
accurately. The internal stray light, which is often the limiting
factor for measurements in the UV spectral range and increases the
uncertainty for TOC analysis, is physically reduced so that no other
stray-light reduction methods, such as mathematical corrections, are
necessary. The instrument has been extensively characterised at the
Physikalisch-Technische Bundesanstalt (PTB) in Germany. During an
international total ozone measurement intercomparison at the
Izaña Atmospheric Observatory in Tenerife, the high-quality applicability of
the instrument was verified with measurements of the direct solar
irradiance and subsequent TOC evaluations based on the spectral data
measured between 12 and 30 September 2016. The results showed
deviations of the TOC of less than 1.5 % from most other
instruments in most situations and not exceeding 3 %
from established TOC measurement systems such as Dobson or Brewer.
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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