Variations of Kelvin waves around the TTL region during the stratospheric  sudden warming events in the Northern Hemisphere winter

Yue, Jia; Zhang, Shaodong; Fan, Yanguo; Huang, Chun Ming; Huang, Kai; Gong, Yun; Gan, Quan

doi:10.5194/angeo-34-331-2016

Cited by 6 publications

(4 citation statements)

References 58 publications

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“…However, according to our results, the amplification of QTDW amplitudes at SY is the most prominent one among the four stations. Using the ERA‐Interim reanalysis data and the COSMIC satellite data, Jia et al () reported that amplification of stratospheric convection in the equatorial region and SSWs occur simultaneously due to enhanced meridional circulation induced by extratropical planetary wave forcing. The enhancement of the QTDWs observed at SY during the SSW in the MLT region might be due to the increased tropical convection in the stratosphere.…”

Section: Resultsmentioning

confidence: 99%

“…It is characterized by increment of the stratospheric temperature in tens of degrees within several days (Matsuno, 1971). This polar event has significant influences on redistribution of the global atmospheric energy and momentum, resulting in perturbations in the atmosphere and ionosphere (e.g., Chau et al, 2009Chau et al, , 2012Fejer et al, 2011;Gong et al, 2013Gong et al, , 2016Gu et al, 2016;Jia et al, 2016;Maute et al, 2016;Pedatella et al, 2014;Wu et al, 2011). The influences of SSWs on the MLT region have been studied by many authors.…”

Section: Introductionmentioning

confidence: 99%

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Responses of Quasi 2 Day Waves in the MLT Region to the 2013 SSW Revealed by a Meteor Radar Chain

Gong

Zhang

et al. 2017

Geophysical Research Letters

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We present an analysis of the responses of quasi 2 day waves (QTDWs) to the 2013 sudden stratosphere warming (SSW) in the mesosphere and lower thermosphere (MLT) region. The study is based on data collected by a meteor radar chain along the 120°E meridian in the Northern Hemisphere which consists of four stations at Mohe (52.5°N, 122.3°E), Beijing (40.3°N, 116.2°E), Wuhan (30.5°N, 114.6°E), and Sanya (18.3°N, 109.6°E). It is the first time that an enhancement of the QTDW in the neutral wind during the 2013 SSW is observed in the midlatitudes in the Northern Hemisphere. During the SSW, the amplification of the QTDW in the low latitudes is the most prominent and the direction of the mean zonal wind shows clear reversion from eastward to westward. The consistent variations of the QTDWs and the mean neutral wind at the four stations are very likely associated with the SSW.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Responses of Quasi 2 Day Waves in the MLT Region to the 2013 SSW Revealed by a Meteor Radar Chain

Gong

Zhang

et al. 2017

Geophysical Research Letters

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“…It is generally believed that SSW is caused by the interaction of PWs propagating upward from the troposphere and zonal mean flow (Matsuno, ). Numerous studies have revealed that SSW has a significant impact on the redistribution of globe atmospheric energy, resulting in large atmospheric and ionospheric variations (e.g., Chau et al, ; Fejer et al, ; Gong et al, , ; Jia et al, ; Limpasuvan et al, ; Maute et al, ; Pedatella & Forbes, ; Pedatella et al, ; Wu et al, ). Responses of PWs to SSWs in the MLT region are reported by many studies (e.g., Chandran et al, ; Limpasuvan et al, ; Ma et al, 2017; Sassi et al, ).…”

Section: Introductionmentioning

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

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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.

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“…The wind reversal in the lower mesosphere is associated with the major SSW with the central date of 23 January 2010 (Jia et al., 2016). Figure 2 shows the zonal wind velocity for both the noMEE (upper panel) and the MEE (lower panel) case.…”

Section: Resultsmentioning

confidence: 99%

The Direct Effect of Medium Energy Electron Precipitation on Mesospheric Dynamics During a Sudden Stratospheric Warming Event in 2010

López

Tyssøy

Smith‐Johnsen

et al. 2022

Geophysical Research Letters

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Medium energy electron (MEE) (30–1,000 keV) precipitation enhances the production of nitric (NOx) and hydrogen oxides (HOx) throughout the mesosphere, which can destroy ozone (O3) in catalytic reactions. The dynamical effect of the direct mesospheric O3 reduction has long been an outstanding question, partly due to the concurrent feedback from the stratospheric O3 reduction. To overcome this challenge, the Whole Atmosphere Community Climate Model version 6 is applied in the specified dynamics mode for the year 2010, with and without MEE ionization rates. The results demonstrate that MEE ionization rates can modulate temperature, zonal wind and the residual circulation affecting NOx transport. The required fluxes of MEE to impose dynamical changes depend on the dynamical preconditions. During the Northern Hemispheric winter, even weak ionization rates can modulate the mesospheric signal of a sudden stratospheric warming event. The result provides a first step in a paradigm shift for the understanding of the MEE direct effect.

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Variations of Kelvin waves around the TTL region during the stratospheric sudden warming events in the Northern Hemisphere winter

Cited by 6 publications

References 58 publications

Responses of Quasi 2 Day Waves in the MLT Region to the 2013 SSW Revealed by a Meteor Radar Chain

Responses of Quasi 2 Day Waves in the MLT Region to the 2013 SSW Revealed by a Meteor Radar Chain

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

The Direct Effect of Medium Energy Electron Precipitation on Mesospheric Dynamics During a Sudden Stratospheric Warming Event in 2010

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