Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers
Comparisons of total column ozone measurements from Dobson, Brewer and SAOZ instruments are presented for the period 1990 to 1995 at seven stations covering the mid- and the high northern latitudes, as well as the Antarctic region. The main purpose of these comparisons is to assess, by reference to...
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ftnerc:oai:nora.nerc.ac.uk:504996 2023-05-15T13:48:08+02:00 Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers Van Roozendael, M. Peeters, P. Roscoe, H. K. De Backer, H. Jones, A. E. Bartlett, L. Vaughan, G. Goutail, F. Pommereau, J.-P. Kyro, E. Wahlstrom, C. Braathen, G. Simon, P. C. 1998 http://nora.nerc.ac.uk/id/eprint/504996/ https://doi.org/10.1023/A:1005815902581 unknown Springer Van Roozendael, M.; Peeters, P.; Roscoe, H. K.; De Backer, H.; Jones, A. E. orcid:0000-0002-2040-4841 Bartlett, L.; Vaughan, G.; Goutail, F.; Pommereau, J.-P.; Kyro, E.; Wahlstrom, C.; Braathen, G.; Simon, P. C. 1998 Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers. Journal of Atmospheric Chemistry, 29 (1). 55-83. https://doi.org/10.1023/A:1005815902581 <https://doi.org/10.1023/A:1005815902581> Publication - Article PeerReviewed 1998 ftnerc https://doi.org/10.1023/A:1005815902581 2023-02-04T19:38:42Z Comparisons of total column ozone measurements from Dobson, Brewer and SAOZ instruments are presented for the period 1990 to 1995 at seven stations covering the mid- and the high northern latitudes, as well as the Antarctic region. The main purpose of these comparisons is to assess, by reference to the well established Dobson network, the accuracy of the zenith-sky visible spectroscopy for the measurement of total ozone. The strengths and present limitations of this latter technique are investigated. As a general result, the different instruments are found to agree within a few percent at all stations, the best agreement being obtained at mid-latitudes. On average, for the mid-latitudes, SAOZ O3 measurements are approximately 2% higher than Dobson ones, with a scatter of about 5%. At higher latitudes, both scatter and systematic deviation tend to increase. In all cases, the relative differences between SAOZ and Dobson or Brewer column ozone are characterised by a significant seasonal signal, the amplitude of which increases from about 2.5% at mid-latitude to a maximum of 7.5% at Faraday, Antarctica. Although it introduces a significant contribution to the seasonality at high latitude, the temperature sensitivity of the O3 absorption coefficients of the Dobson and Brewer instruments is shown to be too small to account for the observed SAOZ/Dobson differences. Except for Faraday, these differences can however be largely reduced if SAOZ AMFs are calculated with realistic climatological profiles of ozone, pressure and temperature. Other sources of uncertainties that might affect the comparison are investigated. Evidence is found that the differences in the air masses sampled by the SAOZ and the other instruments contribute significantly to the scatter, and the impact of the tropospheric clouds on SAOZ measurements is displayed Article in Journal/Newspaper Antarc* Antarctic Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Comparisons of total column ozone measurements from Dobson, Brewer and SAOZ instruments are presented for the period 1990 to 1995 at seven stations covering the mid- and the high northern latitudes, as well as the Antarctic region. The main purpose of these comparisons is to assess, by reference to the well established Dobson network, the accuracy of the zenith-sky visible spectroscopy for the measurement of total ozone. The strengths and present limitations of this latter technique are investigated. As a general result, the different instruments are found to agree within a few percent at all stations, the best agreement being obtained at mid-latitudes. On average, for the mid-latitudes, SAOZ O3 measurements are approximately 2% higher than Dobson ones, with a scatter of about 5%. At higher latitudes, both scatter and systematic deviation tend to increase. In all cases, the relative differences between SAOZ and Dobson or Brewer column ozone are characterised by a significant seasonal signal, the amplitude of which increases from about 2.5% at mid-latitude to a maximum of 7.5% at Faraday, Antarctica. Although it introduces a significant contribution to the seasonality at high latitude, the temperature sensitivity of the O3 absorption coefficients of the Dobson and Brewer instruments is shown to be too small to account for the observed SAOZ/Dobson differences. Except for Faraday, these differences can however be largely reduced if SAOZ AMFs are calculated with realistic climatological profiles of ozone, pressure and temperature. Other sources of uncertainties that might affect the comparison are investigated. Evidence is found that the differences in the air masses sampled by the SAOZ and the other instruments contribute significantly to the scatter, and the impact of the tropospheric clouds on SAOZ measurements is displayed |
format |
Article in Journal/Newspaper |
author |
Van Roozendael, M. Peeters, P. Roscoe, H. K. De Backer, H. Jones, A. E. Bartlett, L. Vaughan, G. Goutail, F. Pommereau, J.-P. Kyro, E. Wahlstrom, C. Braathen, G. Simon, P. C. |
spellingShingle |
Van Roozendael, M. Peeters, P. Roscoe, H. K. De Backer, H. Jones, A. E. Bartlett, L. Vaughan, G. Goutail, F. Pommereau, J.-P. Kyro, E. Wahlstrom, C. Braathen, G. Simon, P. C. Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers |
author_facet |
Van Roozendael, M. Peeters, P. Roscoe, H. K. De Backer, H. Jones, A. E. Bartlett, L. Vaughan, G. Goutail, F. Pommereau, J.-P. Kyro, E. Wahlstrom, C. Braathen, G. Simon, P. C. |
author_sort |
Van Roozendael, M. |
title |
Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers |
title_short |
Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers |
title_full |
Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers |
title_fullStr |
Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers |
title_full_unstemmed |
Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers |
title_sort |
validation of ground-based visible measurements of total ozone by comparison with dobson and brewer spectrophotometers |
publisher |
Springer |
publishDate |
1998 |
url |
http://nora.nerc.ac.uk/id/eprint/504996/ https://doi.org/10.1023/A:1005815902581 |
long_lat |
ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Antarctic The Antarctic Faraday |
geographic_facet |
Antarctic The Antarctic Faraday |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Van Roozendael, M.; Peeters, P.; Roscoe, H. K.; De Backer, H.; Jones, A. E. orcid:0000-0002-2040-4841 Bartlett, L.; Vaughan, G.; Goutail, F.; Pommereau, J.-P.; Kyro, E.; Wahlstrom, C.; Braathen, G.; Simon, P. C. 1998 Validation of ground-based visible measurements of total ozone by comparison with Dobson and Brewer spectrophotometers. Journal of Atmospheric Chemistry, 29 (1). 55-83. https://doi.org/10.1023/A:1005815902581 <https://doi.org/10.1023/A:1005815902581> |
op_doi |
https://doi.org/10.1023/A:1005815902581 |
_version_ |
1766248743325138944 |