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

Kishore, P.; Ratnam, M. Venkat; Jiang, Jonathan H.; Madhavi, G. N.

doi:10.5194/angeo-30-1529-2012

Cited by 11 publications

(7 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, reports on the relation between 5DWs and SSWs are limited. Using the MLS temperature measurements, Kishore et al () reported that PWs with periods of 3–5 days are observed during the 2009 SSW at high latitudes. Based on the simulation results from the Whole Atmosphere Community Climate Model eXtended version, Sassi et al () reported that fast Rossby normal modes with periods less than 10 days are generated during the 2009 SSW.…”

Section: Responses Of 5dws To the 2013 Ssw Eventmentioning

confidence: 99%

See 1 more Smart Citation

Study of the Quasi‐5‐Day Wave in the MLT Region by a Meteor Radar Chain

Gong

Chun

et al. 2018

JGR Atmospheres

View full text Add to dashboard Cite

An extensive analysis of quasi 5‐day waves (5DWs) in the mesosphere and lower thermosphere and their responses to a major sudden stratospheric warming (SSW) event (January 2013) are presented. The analysis is based on data conducted from a meteor radar chain in the period from December 2008 to November 2017 and Aura Microwave Limb Sounder satellite. The radar chain includes three stations located at Mohe (MH, 53.5°N, 122.3°E), Beijing (BJ, 40.3°N, 116.2°E), and Wuhan (WH, 30.5°N, 114.6°E). The 5DWs present clear interannual and seasonal variations, which are observed by both the radar wind data and Aura‐temperature data. Interestingly, the ter‐annual oscillation is found to be as important as the commonly recognized annual oscillation and semiannual oscillation at the three stations in both neutral wind components. The 5DWs are strong mainly during the August/September in the meridional component, while they are primarily enhanced in the period of January, April/May, and late summer in the zonal component. An enhancement of 5DWs is observed during the 2013 SSW event in the mesosphere and lower thermosphere region at the three stations. The amplitudes during the SSW are more than 2 times larger than the January average. The strength of the amplification is most prominent at MH and reduces as latitude decreases. According to the results obtained from the radar wind and Aura temperature, the enhanced 5DW modes are W1 at MH, and W2 at BJ and WH. Our results indicate that the amplification of the 5DWs is very likely associated with the 2013 SSW.

show abstract

Section: Responses Of 5dws To the 2013 Ssw Eventmentioning

confidence: 99%

“…However, reports on the relation between 5DWs and SSWs are limited. Using the MLS temperature measurements, Kishore et al (2012) reported that PWs with periods of 3-5 days are observed during the 2009 SSW at high latitudes. Based on the simulation…”

Section: Responses Of 5dws To the 2013 Ssw Eventmentioning

confidence: 99%

Study of the Quasi‐5‐Day Wave in the MLT Region by a Meteor Radar Chain

Gong

Chun

et al. 2018

JGR Atmospheres

View full text Add to dashboard Cite

show abstract

“…Higher frequency oscillations are captured in the first mode and subsequent modes have successively lower average frequencies. Detailed methodology of extracting IMFs from time series data is provided in Kishore et al (2012). The main advantage of this method is that sensitivity to local details can exploited to identify periodic or quasi-periodic background signals.…”

Section: Intrinsic Mode Function (Imf) Analysismentioning

confidence: 99%

Long-term trends observed in the middle atmosphere temperatures using ground based LIDARs and satellite borne measurements

et al. 2014

Self Cite

View full text Add to dashboard Cite

Abstract. Long-term data available from Lidar systems located at three different locations namely São José dos Campos, Brazil (23.2 • S, 45.8 • W), Gadanki (13.5 • N, 79.2 • E) and Reunion (20.8 • S, 55.5 • E) have been used to investigate the long-term variations like Annual, Semi-annual, Quasi-biennial, El Nino Southern Oscillation and solar cycle. These oscillations are also extracted from simultaneous satellite borne measurements of HALogen Occultation Experiment (HALOE) instrument onboard UARS and SABER onboard TIMED over these stations making largest time series covering the entire middle atmosphere. A good agreement is found between the LIDAR and satellite-derived amplitudes and phases between 30 and 65 km altitude, which suggests that satellite measurements can be used to investigate the long-term trends globally. Latter measurements are extended to 80 km in order to further investigate these oscillations. Large difference in the amplitudes between the eastern pacific and western pacific is noticed in these oscillations. Changing from cooling trends in the stratosphere to warming trends in the mesosphere occurs more or less at altitude around 70 km altitude and this result agrees well with that observed by satellite measurements reported in the literature. The peak in the cooling trend does not occur at a fixed altitude in the stratosphere however maximum warming trend is observed around 75 km at all the stations. The observed long-term trends including various oscillations are compared with that reported with various techniques.

show abstract

“…The first (principal) mode captures the higher frequency oscillations, with the following modes capturing successively lower frequencies. A more detailed description and methodology of extracting IMFs from the time series data can be found elsewhere (Kishore et al, 2012;Huang et al, 2012). In addition, the Lomb-Scargle periodogram (LSP) analysis method (Scargle, 1982) of spectral analysis was used for determination of PW amplitude and phase.…”

Section: Database and Analysis Proceduresmentioning

confidence: 99%

A case study of mesospheric planetary waves observed over a three-radar network using empirical mode decomposition

et al. 2018

View full text Add to dashboard Cite

Abstract. In this paper an attempt is made to study equatorial Kelvin waves using a network of three radars: Kototabang (0.204 • S, 100.320 • E) meteor radar, Pameungpeuk (7.646 • S, 107.688 • E) medium-frequency radar, and Pontianak (0.003 • S, 109.367 • E) medium-frequency radar. We have used the continuous data gathered from the three radars during April-May 2010. Empirical mode decomposition (EMD), Lomb-Scargle periodogram (LSP) analysis, and wavelet techniques are used to study the temporal and altitude structures of planetary waves. Here, we used a novel technique called EMD to extract the planetary waves from wind data. The planetary waves of ∼ 6.5 and ∼ 3.6 days periodicity are observed in all three radar stations with peak amplitudes of about 12 and 11 m s −1 , respectively. The 3.6-day wave has an average vertical wavelength from the three radars of about 42 km. The 3.6-and 6.5-day planetary waves are particularly strong in the zonal wind component. We find that the two waves are present at the 84-94 km height region. The observed features of the 3.6-and 6.5-day waves at the three tropical-latitude stations show some correspondence with the results reported for the equatorial-latitude stations.

show abstract

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

Cited by 11 publications

References 46 publications

Study of the Quasi‐5‐Day Wave in the MLT Region by a Meteor Radar Chain

Study of the Quasi‐5‐Day Wave in the MLT Region by a Meteor Radar Chain

Long-term trends observed in the middle atmosphere temperatures using ground based LIDARs and satellite borne measurements

A case study of mesospheric planetary waves observed over a three-radar network using empirical mode decomposition

Contact Info

Product

Resources

About