An intercomparison between the GSWM, UARS, and ground based radar observations: a case-study in January 1993

Palo, S. E.; Hagan, M. E.; Meek, C. E.; Vincent, R. A.; Burrage, M. D.; McLandress, C.; Franke, Steven; Ward, W. E.; Clark, Ronald; Hoffmann, Peter; Johnson, R. M.; Kürschner, D.; Manson, A. H.; Murphy, D. J.; Nakamura, Takuji; Portnyagin, Yu. I.; Salah, J. E.; Schminder, R.; Singer, W.; Tsuda, Toshitaka; Virdi, T. S.; Zhou, Qihou

doi:10.1007/s00585-997-1123-x

Cited by 41 publications

(26 citation statements)

References 44 publications

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“…Regarding the tidal amplitudes, our simulation results show some agreement with certain observations in some disagreement with the GSWM-00, suggesting that the nonlinear effect could be an important cause of the discrepancy between the observation and the GSWM-00. Palo et al (1997) provided a comparison between the GSWM, UARS, and ground-based radar observations in January 1993, and found that there were a number of cases where their agreement was not particularly good between 95 and 105 km. One such instance is for the meridional semidiurnal tide in the Northern Hemisphere, where the GSWM estimates may exceed observations by 50%.…”

Section: Discussionmentioning

confidence: 99%

“…It is well known that in the MLT, large tidal amplitude may lead to many nonlinear effects, which cannot be described appropriately by the linearized GSWMs. In fact, a number of tidal observations in different latitudinal regions (Burrage et al, 1995;Palo et al, 1997;Oberheide et al, 2000;Bruinsma et al, 2002;Grieger et al, 2002;Pancheva et al, 2002;She et al, 2003;Batista et al, 2004; showed obvious discrepancies from the GSWMs, especially at altitudes above 90 km, where larger tidal amplitudes appear and have the potential to lead to a stronger nonlinear interaction. The effect of the nonlinear interaction is not clear and needs to be investigated.…”

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confidence: 99%

“…The seasonal and geographic characteristics of tides have been experimentally studied over the last three decades with measurements of both satellite (Hays et al, 1994;McLandress et al, 1994;Burrage et al, 1995;Khattatov et al, 1996;McLandress et al, 1996;Palo et al, 1997;Bruinsma et al, 2002;Manson et al, 2002a;Shepherd and FrickeBegemann, 2004) and ground-based instruments, including MF radars (Khattatov et al, 1996;Palo et al, 1997;Vincent et al, 1998;Pancheva et al, 2002;Namboothiri et al, 2004;Riggin et al, 2003), VHF radars (Yi, 2001), Meteor radars (Pancheva et al, 2002;Batista et al, 2004), Lidars (Williams and She, 1998;States and Gardner, 2000;Kumar et al, 2003;She et al, 2003;Shepherd and Fricke-Begemann, 2004) and Incoherent-Scatter radars (Palo et al, 1997). Although global ground-based observational campaigns (Pancheva et al, 2002;Palo et al, 1997;Manson et al, 1999;2002b; and satellite observations have Published by Copernicus GmbH on behalf of the European Geosciences Union.…”

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confidence: 99%

“…Although global ground-based observational campaigns (Pancheva et al, 2002;Palo et al, 1997;Manson et al, 1999;2002b; and satellite observations have Published by Copernicus GmbH on behalf of the European Geosciences Union. 3242 C. M. Huang et al: Impact of nonlinear interactions on the amplitude of the migrating semidiurnal tide significantly increased the amount of data available for tidal analysis on a planetary scale in the past few years, the observations are still not capable of providing a fully global, continuous characterization of tides, due to their limited spatial and temporal coverage (e.g.…”

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confidence: 99%

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A numerical study on the impact of nonlinear interactions on the amplitude of the migrating semidiurnal tide

Huang

Zhang²,

Yi³

2006

Ann. Geophys.

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Abstract. To quantitatively study the effects of nonlinear interactions on tide structure, a nonlinear numerical tidal model is developed, and the reliability and convergence of the adopted algorithm and coding are checked by numerical experiments. Under the same conditions as those employed by the GSWM-00 (Global Scale Wave Model 2000), our model provides the nonlinear quasi-steady solution of the migrating semidiurnal tide, which differs from the GSWM-00 result (the linear steady solution) in the MLT region, especially above 100 km. Additionally, their amplitude difference displays a remarkable month-to-month variation, and its significant magnitudes occur during the month with strong semidiurnal tide. A quantitative analysis suggests that the main cause for the amplitude difference is that the initial migrating 12-h tide will interact with the mean flow as well as the nonlinearity-excited 6-h tide, and subsequently yield a new 12-h tidal part. Furthermore, our simulations also show that the mean flow/tidal interaction will significantly alter the background wind and temperature fields. The large magnitudes of the tidal amplitude difference and the background alteration indicate that the nonlinear processes involved in tidal propagations should be comprehensively considered in the description of global atmospheric dynamics in the MLT region. The comparisons among our simulations, the GSWMs and some observations of tides suggest that the nonlinearityinduced tidal structure variation could be a possible mechanism to account for some discrepancies between the GSWMs and the observations.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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A numerical study on the impact of nonlinear interactions on the amplitude of the migrating semidiurnal tide

Huang

Zhang²,

Yi³

2006

Ann. Geophys.

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“…These instruments provided a powerful global view of the wind field of the planet. In addition to studying MLT region atmospheric dynamics, they also provided the means and motivation for the intercomparison of MLT winds derived from different techniques for the purposes of ground proofing the satellite measurements (e.g., Palo et al 1997), and provided a better understanding of the limitations of the various measurement techniques.…”

Section: Satellite Intercomparisonsmentioning

confidence: 99%

MF and HF radar techniques for investigating the dynamics and structure of the 50 to 110 km height region: a review

Reid

2015

Prog. in Earth and Planet. Sci.

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The application of medium-frequency (MF) and high-frequency (HF) partial reflection radar to investigate the neutral upper atmosphere is one of the oldest such techniques still regularly in use. The techniques have been continuously improved and remain a robust and reliable method of obtaining wind velocities, turbulence intensities, electron densities, and measurements of atmospheric structure in the mesosphere lower thermosphere (MLT) region (50 to 110 km). In this paper, we review recent developments, discuss the strengths and weaknesses of the technique, and consider possible improvements.

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Generation of secondary waves arising from nonlinear interaction between the quasi 2 day wave and the migrating diurnal tide

et al. 2016

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Theory and past observations have provided evidence that atmospheric tides and other global‐scale waves interact nonlinearly to produce additional secondary waves throughout the space‐atmosphere interaction region. However, few studies have investigated the generation region of nonlinearly generated secondary waves, and as a result, the manifestation and impacts of these waves are still poorly understood. This study focuses on the nonlinear interaction between the quasi 2 day wave (2dayW3) and the migrating diurnal tide (DW1), two of the largest global‐scale waves in the atmosphere. The fundamental goals of this effort are to characterize the forcing region of the secondary waves and to understand how it relates to their manifestation on a global scale. First, the Fast Fourier Synoptic Mapping method is applied to Thermosphere Ionosphere Mesosphere Energetics and Dynamics‐Sounding of the Atmosphere using Broadband Emission Radiometry satellite observations to provide new evidence of secondary waves. These results show that secondary waves are only significant above 80 km. The nonlinear forcing for each secondary wave is then computed by extracting short‐term primary wave information from a reanalysis model. The estimated nonlinear forcing quantities are used to force a linearized tidal model in order to calculate numerical secondary wave responses. Model results show that the secondary waves are significant from the upper mesosphere to the middle thermosphere, highlighting the implications for the atmosphere‐space weather coupling. The study also concludes that the secondary wave response is most sensitive to the nonlinear forcing occurring in the lower and middle mesosphere and not coincident with the regions of strongest nonlinear forcing.

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An intercomparison between the GSWM, UARS, and ground based radar observations: a case-study in January 1993

Cited by 41 publications

References 44 publications

A numerical study on the impact of nonlinear interactions on the amplitude of the migrating semidiurnal tide

A numerical study on the impact of nonlinear interactions on the amplitude of the migrating semidiurnal tide

MF and HF radar techniques for investigating the dynamics and structure of the 50 to 110 km height region: a review

Generation of secondary waves arising from nonlinear interaction between the quasi 2 day wave and the migrating diurnal tide

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