Numerical simulations of gravity waves imaged over Arecibo during the 10‐day January 1993 campaign

Hickey, Michael P.; Walterscheid, R. L.; Taylor, Michael J.; Ward, W. E.; Schubert, G.; Zhou, Qin; García, Félix Guillén; Kelly, Michael C.; Shepherd, G. G.

doi:10.1029/97ja00181

Cited by 52 publications

(65 citation statements)

References 47 publications

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“…This means that on any given day the actual winds could be stronger than predicted by the climatological mean model. The analysis for ducting or trapping uses Hickey's full wave model, as described in detail by Hickey et al [1997Hickey et al [ , 1998] and by Walterscheid et al [1999]. We will use the word ducted to refer to ducted or trapped waves in the remainder of the paper.…”

Section: Experimental Instrumentation and Techniquementioning

confidence: 99%

“…If the waves were associated with such distant sources, they must be ducted to reach Adelaide. Walterscheid et al [1999] explored this possibility, using a full wave model analysis [Hickey et al, 1997[Hickey et al, , 1998] and showed that there exists a lower thermospheric thermal duct, the upper boundary of which occurs around 140 km and the lower boundary being determined by the location of the mesopause. Since the mesopause occurs near 85 km altitude in summer and around 100 km altitude in winter, this would explain why QM wave activity increased in the summer, as such waves were ducted in the airglow layer.…”

Section: Introductionmentioning

confidence: 99%

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Climatology and modeling of quasi‐monochromatic atmospheric gravity waves observed over Urbana Illinois

Hecht¹,

Walterscheid²,

Hickey³

et al. 2001

J. Geophys. Res.

101

165

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Abstract. From analyzing nine months of airglow imaging observations of atmospheric gravity waves (AGWs) over Adelaide, Australia (35øS) [Walterscheid et al., 1999] have proposed that many of the quasi-monochromatic waves seen in the images were primarily thermally ducted. Here are presented 15 months of observations, from February 1996 to May 1997, for AGW frequency and propagation direction from a northern latitude site, Urbana Illinois (40øN). As Adelaide, Urbana is geographically distant from large orographic features. Similar to what was found in Adelaide, the AGWs seem to originate from a preferred location during the time period around summer solstice. In conjunction with these airglow data there exists MF radar data to provide winds in the 90 km region and near-simultaneous lidar data which provide a temperature climatology. The temperature data have previously been analyzed by States and Gardner [2000]. The temperature and wind data are used here in a full wave model analysis to determine the characteristics of the wave ducting and wave reflection during the 15 month observation period. This model analysis is applied to this and another existing data set recently described by Nakamura et al. [1999]. It is shown that the existence of a thermal duct around summer solstice can plausibly account for our observations. However, the characteristics of the thermal duct and the ability of waves to be ducted is also greatly dependent on the characteristics of the background wind. A simple model is constructed to simulate the trapping of these waves by such a duct. It is suggested that the waves seen over Urbana originate no more than a few thousand kilometers from the observation site. IntroductionThe ducting or trapping of atmospheric gravity waves (AGWs) has long been a subject of interest [e.g., Pitteway and

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Section: Experimental Instrumentation and Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Climatology and modeling of quasi‐monochromatic atmospheric gravity waves observed over Urbana Illinois

Hecht¹,

Walterscheid²,

Hickey³

et al. 2001

J. Geophys. Res.

101

165

View full text Add to dashboard Cite

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“…A vertical integration of the volume emission rates through the vertical extent of the OH layer provides the brightness and brightness-weighted temperature perturbations, from which Krassovsky's ratio is determined. The OH chemistry we use is the same as that used previously (Hickey et al, 1997) and is for the OH (8-3) emission. We also determine the vertical wavelength at the peak of the OH emission layer evaluated from the phase variations in the temperature perturbations determined by the full-wave model.…”

Section: The Multispectral Photometermentioning

confidence: 99%

“…In order to study the wave features present in the mesosphere-lower thermosphere region, we consider clear-sky nights having more than 5 h of continuous OH band data as mentioned in earlier reports (e.g., Taori et al, 2005 The full-wave model is a linear, steady-state model that solves the linearized Navier-Stokes equations on a highresolution vertical grid to describe the vertical propagation of acoustic-gravity waves in a windy background atmosphere including molecular viscosity and thermal conduction, ion drag, Coriolis force, and the eddy diffusion of heat and momentum in the mesosphere. The model description, including equations, boundary conditions, and method of solution, has been described elsewhere (Hickey et al, 1997;Walterscheid and Hickey, 2001;Schubert et al, 2003). The neutral perturbations are used as input to a linear, steady-state model describing OH airglow fluctuations (Hickey and Yu, 2005).…”

Section: The Multispectral Photometermentioning

confidence: 99%

Response of OH airglow emissions to mesospheric gravity waves and comparisons with full-wave model simulation at a low-latitude Indian station

et al. 2016

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Abstract. Quasi-monochromatic gravity-wave-induced oscillations, monitored using the mesospheric OH airglow emission over Kolhapur (16.8 • N, 74.2 • E), India, during January to April 2010 and January to December 2011, have been characterized using the Krassovsky method. The nocturnal variability reveals prominent wave signatures with periods ranging from 5.2 to 10.8 h as the dominant nocturnal wave with embedded short-period waves having wave periods of 1.5-4.4 h. The results show that the magnitude of the Krassovsky parameter, viz. |η|, ranged from 2.1 to 10.2 h for principal or long nocturnal waves (5.2-10.8 h observed periods), and from 1.5 to 5.4 h for the short waves (1.5-4.4 h observed periods) during the years of 2010 and 2011, respectively. The phase (i.e., ) values of the Krassovsky parameters exhibited larger variability and varied from −8.1 to −167 • . The deduced mean vertical wavelengths are found to be approximately −60.2 ± 20 and −42.8 ± 35 km for longand short-period waves for the year 2010. Similarly, for 2011 the mean vertical wavelengths are found to be approximately −77.6 ± 30 and −59.2 ± 30 km for long and short wave periods, respectively, indicating that the observations over Kolhapur were dominated by upward-propagating waves. We use a full-wave model to simulate the response of OH emission to the wave motion and compare the results with observed values.

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“…To simulate gravity wave propagation in a realistic atmosphere containing height-dependent winds, diffusion, and mean temperature gradients, we employ a full-wave model that has been described by Hickey et al [1997Hickey et al [ , 1998Hickey et al [ , 2000a. The model solves the linearized Navier-Stokes equations for steady-state waves propagating in a nonisothermal atmosphere, including the eddy and molecular diffusion of heat and momentum and horizontal mean winds.…”

Section: Model Descriptionmentioning

confidence: 99%

Numerical simulations of gravity waves imaged over Arecibo during the 10‐day January 1993 campaign

Cited by 52 publications

References 47 publications

Climatology and modeling of quasi‐monochromatic atmospheric gravity waves observed over Urbana Illinois

Climatology and modeling of quasi‐monochromatic atmospheric gravity waves observed over Urbana Illinois

Response of OH airglow emissions to mesospheric gravity waves and comparisons with full-wave model simulation at a low-latitude Indian station

Reflection of a long‐period gravity wave observed in the nightglow over Arecibo on May 8–9, 1989?

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