Latitudinal wave coupling of the stratosphere and mesosphere during the major stratospheric warming in 2003/2004

Pancheva, D.; Mukhtarov, Plamen; Mitchell, N. J.; Andonov, B.; Merzlyakov, E. G.; Singer, W.; Murayama, Yasuhiro; Kawamura, Seiji; Xiong, Juan; Wan, Weixing; Hocking, W. K.; Fritts, David C.; Riggin, D. M.; Meek, C. E.; Manson, A. H.

doi:10.5194/angeo-26-467-2008

Cited by 53 publications

(61 citation statements)

References 38 publications

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“…At 42 km altitude level, the maximum peaks at around ∼3.6 day, ∼8 day, ∼15 day, and ∼21-23 day are observed during the winter 2009 for the four IMFs, respectively. These are in agreement with the work of Pancheva et al (2008), the dominating wave periods of ∼22-23, ∼16 day and ∼11 day in the stratospheric heights using the waves with MLS temperatures and MERRA winds can be observed from the table. During SH winter, Dowdy et al (2004) observed a distinct change in the character of the planetary-wave field associated with SSW events.…”

Section: P Kishore Et Al: Planetary Waves In the Upper Stratospheresupporting

confidence: 92%

“…The key mechanism behind the sudden stratospheric warming (SSW), initially proposed by Matsuno (1971) and now widely accepted, relates to the growth of upward propagating transient planetary waves (PWs) and their non-linear interaction with the zonal mean flow. Later, SSWs are reasonably well characterized from observational data sets (Labitzke and Naujokat, 2000;Hoffmann et al, 2002Hoffmann et al, , 2007Venkat Ratnam et al, 2004;Cho et al, 2004;Pancheva et al, 2008) and also through modeling (Newman and Nash, 2004;Manney et al, 2008b).…”

Section: Introductionmentioning

confidence: 92%

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Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming

et al. 2012

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Abstract. The AURA-MLS daily mean temperatures and zonal wind from NASA-MERRA reanalysis for latitudes between 60 • N and 80 • N are used to investigate the planetary wave (PW) characteristics in the stratosphere and lower mesosphere during sudden stratospheric warming (SSW) (November 2008 to March 2009). Here, we used a novel method called empirical mode decomposition (EMD) to extract the PWs from the temperature data. The EMD is an interesting approach to decompose signals into locally periodic components, the intrinsic mode functions (IMFs), and will easily identify the embedded structures, even those with small amplitudes. The spectral analysis reveals prevailing planetary wave periods of ∼6-day, ∼8-day, ∼15-day, and ∼21-23-day in IMFs 1, 2, 3, and 4, respectively. Clear upward propagation of these waves (20-30 days) is observed, suggesting that sources for these oscillations are in the troposphere.

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Section: P Kishore Et Al: Planetary Waves In the Upper Stratospheresupporting

confidence: 92%

Section: Introductionmentioning

confidence: 92%

Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming

et al. 2012

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“…Sudden stratospheric warmings (SSWs) are much more prevalent in the Arctic than in the Antarctic due to the larger Northern Hemisphere planetary wave forcing (Manney et al, 2005;Pancheva et al, 2008a). An increase in planetary wave activity is noticed prior to the onset of an SSW which preconditions the atmosphere (e.g.…”

Section: Introductionmentioning

confidence: 99%

Planetary wave activity in the polar lower stratosphere

Alexander

Shepherd

2010

Atmos. Chem. Phys.

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Abstract. Temperature data from the COSMIC GPS-RO satellite constellation are used to study the distribution and variability of planetary wave activity in the low to midstratosphere (15-40 km) of the Arctic and Antarctic from September 2006 until March 2009. Stationary waves are separated from travelling waves and their amplitudes, periods and small-scale vertical distribution then examined. COS-MIC observed short lived (less than two weeks and less than 5 km vertically) but large enhancements in planetary wave amplitudes occurring regularly throughout all winters in both hemispheres. In contrast to recent Arctic winters, eastward wave activity during 2008-2009 was significantly reduced during the early part of the winter and immediately prior to the major SSW. The eastward waves which did exist had similar periods to the two preceding winters (∼ 16-20 days). A westward wave with zonal wavenumber two, with distinct peaks at 22 km and 35 km and period around 16-24 days, as well as a stationary wave two were associated with the 2009 major SSW. In the Southern Hemisphere, the height structure of planetary wave amplitudes also exhibited fluctuations on short time and vertical scales superimposed upon the broader seasonal cycle. Significant inter-annual variability in planetary wave amplitude and period are noticed, with the times of cessation of significant activity also varying.

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“…Azeem et al (2005) analyzed the 2002 austral winter temperature data at ∼87 km, inferred from South Pole OH(3,1) airglow measurements, and showed that the strong 4-day wave signature seen in the temperature data was associated with the SW event. Radar studies of Espy et al (2005) and Pancheva et al (2008) also have showed similar intensification of planetary waves prior to the onset of the SSW event. Planetary wave amplification in the MLT region prior to the SSW event was also confirmed by radar wind measurements from Antarctica (Mbatha et al, 2009;Dowdy et al, 2007).…”

Section: Introductionmentioning

confidence: 93%

Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event

et al. 2010

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Abstract. We present kinetic temperatures at ∼87 km and ∼94 km altitudes inferred from OH (6,2) and O 2 At(0,1) airglow observations, respectively, at South Pole (90 • S), Antarctica in the austral winter of 2002. These OH and O 2 rotational temperatures measurements show mesosphere and lower thermosphere (MLT) temperature anomalies prior to the 2002 Southern Hemisphere Sudden Stratospheric Warming (SSW) . In this paper we focus on the first of the three minor stratospheric warmings which preceded the major SSW event. Temperature anomalies observed in the MLT region show sudden cooling ( T =∼30 K) in OH temperatures accompanied by warming ( T =∼15 K) in O 2 temperatures preceding the onset of SSW event by about three to four weeks. This shallow vertical extent of mesospheric cooling is in agreement with the numerical simulation of Coy et al. (2005), however, the model cooling was centered well below the mesopause level. The other observed feature of the South Pole MLT temperature dataset is the intensification of planetary wave activity prior to the onset of SSW event. Fourier analyses of both OH and O 2 temperatures show amplification of planetary wave activity in the 5-10 day range prior to the onset of SSW. The timing of wave amplification seen in the wave spectra coincides with the peak in OH and O 2 temperature anomalies.

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Latitudinal wave coupling of the stratosphere and mesosphere during the major stratospheric warming in 2003/2004

Cited by 53 publications

References 38 publications

Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming

Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming

Planetary wave activity in the polar lower stratosphere

Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event

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