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| Titel |
Intercomparison of UV-visible measurements of ozone and NO2 during the Canadian Arctic ACE validation campaigns: 2004-2006 |
| VerfasserIn |
A. Fraser, F. Goutail, K. Strong, P. F. Bernath, C. Boone, W. H. Daffer, J. R. Drummond, D. G. Dufour, T. E. Kerzenmacher, G. L. Manney, C. T. McElroy, C. Midwinter, C. A. McLinden, F. Nichitiu, C. R. Nowlan, J. Walker, K. A. Walker, H. Wu, J. Zou |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 6 ; Nr. 8, no. 6 (2008-03-26), S.1763-1788 |
| Datensatznummer |
250005939
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| Publikation (Nr.) |
 copernicus.org/acp-8-1763-2008.pdf |
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| Zusammenfassung |
| The first three Canadian Arctic ACE validation campaigns were held during
polar sunrise at Eureka, Nunavut, Canada (80° N, 86° W) from
2004 to 2006 in support of validation of the ACE (Atmospheric Chemistry
Experiment) satellite mission. Three or four zenith-sky viewing UV-visible
spectrometers have taken part in each of the three campaigns. The
differential slant column densities and vertical column densities of ozone and NO2 from these
instruments have been compared following the methods of the UV-visible
Working Group of the NDACC (Network for Detection of Atmospheric Composition
Change). The instruments are found to partially agree within the required
accuracies for both species, although both the vertical and slant column
densities are more scattered than required. This might be expected given the
spatial and temporal variability of the Arctic stratosphere in spring. The
vertical column densities are also compared to integrated total columns from
ozonesondes and integrated partial columns from the ACE-FTS (ACE-Fourier
Transform Spectrometer) and ACE-MAESTRO (ACE-Measurements of Aerosol
Extinction in the Stratosphere and Troposphere Retrieved by Occultation)
instruments on board ACE. For both species, the columns from the ground-based
instruments and the ozonesondes are found to generally agree within their
combined error bars. The ACE-FTS ozone partial columns and the ground-based
total columns agree within 4.5%, averaged over the three campaigns. The
ACE-MAESTRO ozone partial columns are generally smaller than those of the
ground-based instruments, by an average of 9.9%, and are smaller than the
ACE-FTS columns by an average of 14.4%. The ACE-FTS NO2 partial columns
are an average of 13.4% smaller than the total columns from the ground-based
instruments, as expected. The ACE-MAESTRO NO2 partial columns are larger
than the total columns of the ground-based instruments by an average of 2.5%
and are larger than the partial columns of the ACE-FTS by an average of 15.5%. |
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