Intercomparison of Odin–SMR ozone profiles with ground-based millimetre-wave observations in the Arctic, the mid-latitudes, and the tropics

Kopp, G.; Belova, Alla; Riega, V E Diez y; Groß, Jochen; Hochschild, G.; Hoffmann, P.; Murtagh, Donal; Raffalski, Uwe; Urban, Joachim

doi:10.1139/p07-088

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…16b) demonstrate slightly higher ozone values: 4-4.5 ppmv in January and 5 ppmv in March. The lower ozone mixing ratios registered by Odin compared to Aura, are in agreement with results by Kopp et al (2007) who have demonstrated about 20-30% lower ozone values from Odin in the middle stratosphere compared to the ground-based measurements. The wavenumber one oscillations (Figs.…”

Section: Comparison Of the Zonal Means Wavenumber Onesupporting

confidence: 92%

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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: Comparison Of the Zonal Means Wavenumber Onesupporting

confidence: 92%

“…Validation of ozone data from Odin SMR using the 544.9 GHz line was performed in the experimental work by Kopp et al (2007). This showed that the Odin measurements contain a systematic bias of 20-30% lower ozone mixing ratios in the middle stratosphere compared to the groundbased measurements.…”

Section: Odin Smr Datamentioning

confidence: 98%

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

2009

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“…Validation of the Odin ozone data has been reported by Kopp et al (2007), who made an intercomparison of Odin-SMR ozone profiles with ground-based ozone observations. The results showed that the Odin measurements at 544.9 GHz yielded a systematic bias of 20-30% lower ozone mixing ratios in the middle stratosphere than the groundbased measurements.…”

Section: Data Sources and Technique Of Data Analysismentioning

confidence: 99%

Five-day planetary waves in the middle atmosphere from Odin satellite data and ground-based instruments in Northern Hemisphere summer 2003, 2004, 2005 and 2007

et al. 2008

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Abstract.A number of studies have shown that 5-day planetary waves modulate noctilucent clouds and the closely related Polar Mesosphere Summer Echoes (PMSE) at the summer mesopause. Summer stratospheric winds should inhibit wave propagation through the stratosphere and, although some numerical models (Geisler and Dickinson, 1976) do show a possibility for upward wave propagation, it has also been suggested that the upward propagation may in practice be confined to the winter hemisphere with horizontal propagation of the wave from the winter to the summer hemisphere at mesosphere heights causing the effects observed at the summer mesopause. It has further been proposed (Garcia et al., 2005) that 5-day planetary waves observed in the summer mesosphere could be excited in-situ by baroclinic instability in the upper mesosphere. In this study, we first extract and analyze 5-day planetary wave characteristics on a global scale in the middle atmosphere (up to 54 km in temperature, and up to 68 km in ozone concentration) using measurements by the Odin satellite for selected days during northern hemisphere summer from 2003, 2004, 2005 and 2007. Second, we show that 5-day temperature fluctuations consistent with westward-traveling 5-day waves are present at the summer mesopause, using local ground-based meteor-radar observations. Finally we examine whether any of three possible sources of the detected temperature fluctuations at the summer mesopause can be excluded: upward propagation from the stratosphere in the summer-hemisphere, horizontal propagation from the winter-hemisphere or in-situ excitation as a result of the baroclinic instability. We find that in one case, far from solstice, the baroclinic instability is unlikely to be involved. In one further case, close to solstice, upward propCorrespondence to: A. Belova (allab@irf.se) agation in the same hemisphere seems to be ruled out. In all other cases, all or any of the three proposed mechanisms are consistent with the observations.

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Inner-tropical ozone measurements at the Mérida Atmospheric Research Station (MARS) using ground-based microwave radiometry

Kopp

Calderón

Groß

et al. 2009

International Journal of Remote Sensing

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Intercomparison of Odin–SMR ozone profiles with ground-based millimetre-wave observations in the Arctic, the mid-latitudes, and the tropics

Cited by 4 publications

References 21 publications

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

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

Five-day planetary waves in the middle atmosphere from Odin satellite data and ground-based instruments in Northern Hemisphere summer 2003, 2004, 2005 and 2007

Inner-tropical ozone measurements at the Mérida Atmospheric Research Station (MARS) using ground-based microwave radiometry

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