Diurnal variation of gravity wave momentum flux and its forcing on the diurnal tide

Liu, Alan; Lu, Xian; Franke, Steven

doi:10.1029/2012jd018653

Cited by 39 publications

(58 citation statements)

References 56 publications

(104 reference statements)

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“…The anti-correlation is seen during all the few multi-day runs of the MU radar that made meteor observations. This finding is also consistent with the behavior reported by Liu et al (2013), using a meteor radar on Maui, Hawaii.…”

Section: Hocking Technique Resultssupporting

confidence: 93%

“…Such radars can be comparatively modest in size and cost, and can make round the clock observations of the winds. The technique has been widely adopted (e.g., Antonita et al, 2008;Fritts et al, 2010Fritts et al, , 2012Placke et al, 2011a,b;Andrioli et al, 2013;Liu et al, 2013;de Wit et al, 2015). However, there have been some lingering concerns as to whether statistically meaningful estimates of momentum fluxes can be made over timescales of interest to modellers (Vincent et al, 2010).…”

Section: Introductionmentioning

confidence: 98%

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Evaluation of momentum flux with radar

Riggin

Tsuda

Shinbori

2016

Journal of Atmospheric and Solar-Terrestrial Physics

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a b s t r a c tThe statistics of gravity wave momentum flux estimation are investigated using data from the MU radar at Shigariki, Japan (136°E, 35°N). The radar has been operating during campaign periods since 1986. The first part of the paper focuses on a multi-day campaign during October 13-31, 1986. The second part of the paper investigates data after 2006 when the radar was operated in a meteor scatter mode. Momentum fluxes are derived from both the turbulent scatter and the meteor scatter measurements, but the techniques are quite different. Probability Distribution Functions are formed using turbulent scatter data. These show that wave packets sometimes have momentum flux magnitudes in excess of 100 m 2 s À 2 . The technique for meteor radars, introduced by Hocking (2005), has been widely adopted by the radar community in recent years. The momentum flux estimated using this technique is found to be anti-correlated with the background tidal winds. A validation investigation is carried out for periods with a high meteor echo data rate. The conclusion was that the method can be used to calculate the sign of momentum flux, but does not accurately specify the magnitude.

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Section: Hocking Technique Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 98%

Evaluation of momentum flux with radar

Riggin

Tsuda

Shinbori

2016

Journal of Atmospheric and Solar-Terrestrial Physics

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“…Fritts and Vincent [] calculated the time difference to be approximately 2 h. Liu et al . [] reported that the meridional momentum flux and the diurnal tide are approximately 90° out of phase (~6 h). Likewise, the phase of momentum flux also shows seasonal variation with tides.…”

Section: Resultsmentioning

confidence: 99%

Gravity wave characteristics in the mesopause region revealed from OH airglow imager observations over Northern Colorado

Tang

Dou

et al. 2014

JGR Space Physics

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Using 5 years of all-sky OH airglow imager data over Yucca Ridge Field Station, CO (40.7°N, 104.9°W), from September 2003 to September 2008, we extract and deduce quasi-monochromatic gravity wave (GW) characteristics in the mesopause region. The intrinsic periods are clustered between approximately 4 and 10 min, and many of them are unstable and evanescent. GW occurrence frequency exhibits a clear semiannual variation with equinoctial minima, which is likely related to the seasonal variation of background wind. The anomalous propagation direction in January 2006, with strong southward before major warming starting in 21 January and weak southward propagation afterward, was most likely affected by stratospheric sudden warming. The momentum fluxes show strongly anticorrelated with the tides, with~180°out of phase in the zonal component. While in the meridional component, the easterly maximum occurred approximately 2-6 h after maximum easterly tidal wind. However, the anticorrelations are both weakest during the summer. The dissipating and breaking of small-scale and high-frequency GW's components could have a potential impact on the general circulation in the mesopause region.

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“…Antonita et al, 2008;Clemesha and Batista, 2008;Mitchell, 2009, 2010;Clemesha et al, 2009;Fritts et al, 2010aFritts et al, , b, 2012aVincent et al, 2010;Placke et al, 2011aPlacke et al, , b, 2014Placke et al, , 2015Andrioli et al, 2013aAndrioli et al, , b, 2015Liu et al, 2013;de Wit et al, 2014bde Wit et al, , a, 2016Matsumoto et al, 2016;Riggin et al, 2016). This has largely arisen from a need to obtain improved spatial coverage in the parameterization of GWs and their associated momentum transport in climate models of the whole atmosphere (e.g.…”

Section: Introductionmentioning

confidence: 99%

Mesospheric gravity wave momentum flux estimation using hybrid Doppler interferometry

Spargo¹,

MacKinnon²,

Holdsworth³

2017

Ann. Geophys.

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Abstract. Mesospheric gravity wave (GW) momentum flux estimates using data from multibeam Buckland Park MF radar (34.6 • S, 138.5 • E) experiments (conducted from July 1997 to June 1998) are presented. On transmission, five Doppler beams were symmetrically steered about the zenith (one zenith beam and four off-zenith beams in the cardinal directions). The received beams were analysed with hybrid Doppler interferometry (HDI) (Holdsworth and Reid, 1998), principally to determine the radial velocities of the effective scattering centres illuminated by the radar. The methodology of Thorsen et al. (1997), later re-introduced by Hocking (2005) and since extensively applied to meteor radar returns, was used to estimate components of Reynolds stress due to propagating GWs and/or turbulence in the radar resolution volume. Physically reasonable momentum flux estimates are derived from the Reynolds stress components, which are also verified using a simple radar model incorporating GW-induced wind perturbations. On the basis of these results, we recommend the intercomparison of momentum flux estimates between co-located meteor radars and verticalbeam interferometric MF radars. It is envisaged that such intercomparisons will assist with the clarification of recent concerns (e.g. Vincent et al., 2010) of the accuracy of the meteor radar technique.

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Diurnal variation of gravity wave momentum flux and its forcing on the diurnal tide

Cited by 39 publications

References 56 publications

Evaluation of momentum flux with radar

Evaluation of momentum flux with radar

Gravity wave characteristics in the mesopause region revealed from OH airglow imager observations over Northern Colorado

Mesospheric gravity wave momentum flux estimation using hybrid Doppler interferometry

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