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Temperature and ozone data from the sub-millimetre radiometer (SMR)\udinstalled aboard the Odin satellite have been examined to study the\udrelationship between temperature and ozone concentration in the lower and\udupper stratosphere in winter time. The retrieved ozone and temperature\udprofiles have been considered between the range of 24–46 km during the\udNorthern Hemisphere (NH) winter of December 2002 to March 2003 and January\udto March 2005. A comparison between the ozone mixing ratio and temperature\udfields has been made for the zonal means, wavenumber one variations and\ud5-day planetary waves. The amplitude values in temperature variations are\ud~5 K in the wavenumber one and 0.5–1 K in the 5-day wave. In ozone\udmixing ratio, the amplitudes reach ~0.5 ppmv in the wavenumber one\udand 0.05–0.1 ppmv in the 5-day wave.\ud\ud  \ud\udSeveral stratospheric warming events were observed during the NH winters of\ud2002/2003 and early 2005. Along with these warming events, amplification of\udthe amplitude has been detected in wavenumber one (up to 30 K in temperature\udand 1.25 ppmv in ozone) and partly in the 5-day perturbation (up to 2 K in\udtemperature and 0.2 ppmv in ozone).\ud\ud  \ud\udIn general, the results show the expected in-phase behavior between the\udtemperature and ozone fields in the lower stratosphere due to dynamic\udeffects, and an out-of-phase pattern in the upper stratosphere, which is\udexpected as a result of photochemical effects. However, these relationships\udare not valid for zonal means and wavenumber one components when the wave\udamplitudes are changing dramatically during the strongest stratospheric\udwarming event (at the end of December 2002/beginning of January 2003). Also,\udfor several shorter intervals, the 5-day perturbations in ozone and\udtemperature are not well-correlated at lower heights, particularly when\udconditions change rapidly.\ud\ud  \ud\udOdin's basic observation schedule provides stratosphere mode data every\udthird day and to validate the reliability of the 5-day waves extracted from\udthe Odin measurements, additional independent data have been analysed in\udthis study: temperature assimilation data by the European Centre for\udMedium-range Weather Forecasts (ECMWF) for the NH winter of 2002/2003, and\udsatellite measurements of temperature and ozone by the Microwave Limb\udSounder (MLS) on board the Aura satellite for the NH winter in early 2005.\ud\ud  \ud\udGood agreement between the temperature fields from Odin and ECMWF data is\udfound at middle latitude where, in general, the 5-day perturbations from the\udtwo data sets coincide in both phase and amplitude throughout the examined\udinterval. Analysis of the wavenumber one and the 5-day wave perturbations in\udtemperature and ozone fields from Odin and from Aura demonstrates that, for\udthe largest part of the examined period, quite similar characteristics are\udfound in the spatial and temporal domain, with slightly larger amplitude\udvalues seen by Aura. Hence, the comparison between the Odin data, sampled\udeach third day, and daily data from Aura and the ECMWF shows that the Odin\uddata are sufficiently reliable to estimate the properties of the 5-day\udoscillations, at least for the locations and time intervals with strong wave\udactivity

Planetary waves in ozone and temperature in the Northern Hemisphere winters of 2002/2003 and early 2005