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| Titel |
Unusually low ozone, HCl, and HNO3 column measurements at Eureka, Canada during winter/spring 2011 |
| VerfasserIn |
R. Lindenmaier, K. Strong, R. L. Batchelor, M. P. Chipperfield, W. H. Daffer, J. R. Drummond, T. J. Duck, H. Fast, W. Feng, P. F. Fogal, F. Kolonjari, G. L. Manney, A. Manson, C. Meek, R. L. Mittermeier, G. J. Nott, C. Perro, K. A. Walker |
| 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 ; 12, no. 8 ; Nr. 12, no. 8 (2012-04-27), S.3821-3835 |
| Datensatznummer |
250011080
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| Publikation (Nr.) |
 copernicus.org/acp-12-3821-2012.pdf |
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| Zusammenfassung |
| As a consequence of dynamically variable meteorological conditions,
springtime Arctic ozone levels exhibit significant interannual variability
in the lower stratosphere. In winter 2011, the polar vortex was strong and
cold for an unusually long time. Our research site, located at Eureka,
Nunavut, Canada (80.05° N, 86.42° W), was mostly inside the vortex
from October 2010 until late March 2011. The Bruker 125HR Fourier transform
infrared spectrometer installed at the Polar Environment Atmospheric
Research Laboratory at Eureka acquired measurements from 23 February to
6 April during the 2011 Canadian Arctic Atmospheric Chemistry Experiment
Validation Campaign. These measurements showed unusually low ozone, HCl, and
HNO3 total columns compared to the previous 14 yr. To remove
dynamical effects, we normalized these total columns by the HF total column.
The normalized values of the ozone, HCl, and HNO3 total columns were
smaller than those from previous years, and confirmed the occurrence of
chlorine activation and chemical ozone depletion. To quantify the chemical
ozone loss, a three-dimensional chemical transport model, SLIMCAT, and the
passive subtraction method were used. The chemical ozone depletion was
calculated as the mean percentage difference between the measured ozone and
the SLIMCAT passive ozone, and was found to be 35%. |
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