Articles | Volume 15, issue 12
Research article
19 Jun 2015
Research article |  | 19 Jun 2015

Unusual stratospheric ozone anomalies observed in 22 years of measurements from Lauder, New Zealand

G. E. Nedoluha, I. S. Boyd, A. Parrish, R. M. Gomez, D. R. Allen, L. Froidevaux, B. J. Connor, and R. R. Querel

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Cited articles

Allen, D. R. and Nakamura, N.: Tracer equivalent latitude: a diagnostic tool for isentropic transport studies, J. Atmos. Sci., 60, 287–304, 2003.
Allen, D. R., Douglass, A. R., Nedoluha, G. E., and Coy, L.: Tracer transport during the Arctic stratospheric final warming based on a 33-year (1979–2011) tracer equivalent latitude simulation, Geophys. Res. Lett., 39, L12801,, 2012.
Boyd, I. S., Parrish, A. D., Froidevaux, L., von Clarmann, T., Kyrola, E., Russell III, J. M., and Zawodny, J. M.: Ground-based microwave ozone radiometer measurements compared with Aura-MLS v2.2 and other instruments at two Network for Detection of Atmospheric Composition Change sites, J. Geophys. Res., 112, D24S33,, 2007.
Chipperfield, M. P., Gray, L. J., Kinnersley, J. S., and Zawodny, J.: A two-dimensional model study of the QBO signal in SAGE II NO2 and O3, Geophys. Res. Lett., 21, 589–592, 1994.
Connor, B. J., Parrish, A., Tsou, J. J., and McCormick, M. P.: Error analysis for the groundbased microwave ozone measurements during STOIC, J. Geophys. Res., 100, 9283–9291, 1995.
Short summary
This paper highlights 2 unusual mid-stratospheric O3 anomalies in our 22-year ground-based data set. One of these is a large month long increase in June 2001 which we are able to associate with very unusually low equatorial air which persists over Lauder for much of June. The other O3 anomaly persists for ~4 years; using MLS data, we show that this is associated with unusually high N2O during this period. During this period there is also a low O3 and N2O anomaly in the tropics.
Final-revised paper