Polar vortex evolution during Northern Hemispheric winter 2004/05

Chshyolkova, T.; Manson, A. H.; Meek, C. E.; Asô, T.; Avery, S. K.; Hall, Chris M.; Hocking, W. K.; Igarashi, K.; Jacobi, Ch.; Makarov, N. M.; Mitchell, N. J.; Murayama, Yasuhiro; Singer, W.; Thorsen, Denise; Tsutsumi, Masaki

doi:10.5194/angeo-25-1279-2007

Cited by 22 publications

(21 citation statements)

References 35 publications

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“…During the second warming event, the wave amplitude is 20-25 K by both Odin and Aura data sets. Very similar wave magnitudes for this time period have been reported in the paper by Chshyolkova et al (2007, their Fig. 2).…”

Section: Wavenumber One In Ozone and Temperature By Odin And Aurasupporting

confidence: 74%

“…In the lower stratosphere the zonal mean ozone by Aura (Fig. 15b) has an almost constant value, about 5 ppmv, during the entire period Chshyolkova et al (2007) 14-20 K with a slight increase up to 5.5 ppmv in March. Ozone, seen by Odin (Fig.…”

Section: Comparison Of the Zonal Means Wavenumber Onementioning

confidence: 98%

“…The wave amplitude is 10-15 K according to the Odin data and 10-20 K by the Aura data. The results by Chshyolkova et al (2007) show 14-20 K. Table 2 summarizes the amplitudes discussed above.…”

Section: Wavenumber One In Ozone and Temperature By Odin And Auramentioning

confidence: 98%

“…Event 2 was the strongest stratospheric disturbance for this winter. Details about the stratospheric state for this time interval can be found in papers by Chshyolkova et al (2007) and Manson at al. (2008).…”

Section: Northern Hemisphere Winter In Early 2005mentioning

confidence: 99%

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

2009

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Abstract. Temperature and ozone data from the submillimetre radiometer (SMR) installed aboard the Odin satellite have been examined to study the relationship between temperature and ozone concentration in the lower and upper stratosphere in winter time. The retrieved ozone and temperature profiles have been considered between the range of 24-46 km during the Northern Hemisphere (NH) winter of December 2002 to March 2003 and January to March 2005. A comparison between the ozone mixing ratio and temperature fields has been made for the zonal means, wavenumber one variations and 5-day planetary waves. The amplitude values in temperature variations are ∼5 K in the wavenumber one and 0.5-1 K in the 5-day wave. In ozone mixing ratio, the amplitudes reach ∼0.5 ppmv in the wavenumber one and 0.05-0.1 ppmv in the 5-day wave.Several stratospheric warming events were observed during the NH winters of 2002/2003 and early 2005. Along with these warming events, amplification of the amplitude has been detected in wavenumber one (up to 30 K in temperature and 1.25 ppmv in ozone) and partly in the 5-day perturbation (up to 2 K in temperature and 0.2 ppmv in ozone).In general, the results show the expected in-phase behavior between the temperature and ozone fields in the lower stratosphere due to dynamic effects, and an out-of-phase pattern in the upper stratosphere, which is expected as a result of photochemical effects. However, these relationships are not valid for zonal means and wavenumber one components when the wave amplitudes are changing dramatically during the strongest stratospheric warming event (at the end of December 2002/beginning of January 2003). Also, for several shorter intervals, the 5-day perturbations in ozone and temperature are not well-correlated at lower heights, particularly when conditions change rapidly. Good agreement between the temperature fields from Odin and ECMWF data is found at middle latitude where, in general, the 5-day perturbations from the two data sets coincide in both phase and amplitude throughout the examined interval. Analysis of the wavenumber one and the 5-day wave perturbations in temperature and ozone fields from Odin and from Aura demonstrates that, for the largest part of the examined period, quite similar characteristics are found in the spatial and temporal domain, with slightly larger amplitude values seen by Aura. Hence, the comparison between the Odin data, sampled each third day, and daily data from Aura and the ECMWF shows that the Odin data are sufficiently reliable to estimate the properties of the 5-day oscillations, at least for the locations and time intervals with strong wave activity.

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Section: Wavenumber One In Ozone and Temperature By Odin And Aurasupporting

confidence: 74%

Section: Comparison Of the Zonal Means Wavenumber Onementioning

confidence: 98%

Section: Wavenumber One In Ozone and Temperature By Odin And Auramentioning

confidence: 98%

Section: Northern Hemisphere Winter In Early 2005mentioning

confidence: 99%

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

2009

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“…This will be addressed in vortex characterization studies (e.g. Chshyolkova et al, 2007) More significantly, some of the differences between the monthly values of diurnal tidal amplitudes and phases for the two Arctic locations are the largest we have ever seen. There are factors of nearly ten between the March amplitudes, with the zonal component providing the larger differences.…”

Section: Contour-climatologies and Hodographsmentioning

confidence: 99%

Arctic tidal characteristics at Eureka (80° N, 86° W) and Svalbard (78° N, 16° E) for 2006/07: seasonal and longitudinal variations, migrating and non-migrating tides

et al. 2009

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NMT with s=0, +2 (westward) dominate in non-summer months, while for the semi-diurnal tide NMT with s=+1, +3 occur most often during equinoctial or early summer months. These wave numbers are consistent with stationary planetary wave (SPW)-tidal interactions.Assessment of the global topographic forcing and atmospheric propagation of the SPW (S=1, 2) suggests these winter waves of the Northern Hemisphere are associated with the 78-80 • N diurnal NMT, but that the SPW of the Southern Hemisphere winter have little influence on the summer Arctic tidal fields. In contrast the large SPW and NMT of the Arctic winter may be associated, consistent with Antarctic observations, with the observed occurrence of the semidiurnal NMT in the Antarctic summer.

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