Acoustic waves generated by gusty flow over hilly terrain
TLDR
In this article, the authors examined the generation of acoustic waves by gusty flow over hilly terrain using simple theoretical models of the interaction between terrain and eddies and a linear model of acoustic-gravity wave propagation.Abstract:
[1] We examine the generation of acoustic waves by gusty flow over hilly terrain. We use simple theoretical models of the interaction between terrain and eddies and a linear model of acoustic-gravity wave propagation. The calculations presented here suggest that over a dense array of geographically extensive sources orographically generated vertically propagating acoustic waves can be a significant cause of thermospheric heating. This heating may account in good part for the thermospheric hot spot near the Andes reported by Meriwether et al. (1996, 1997).read more
Citations
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Thermospheric mass density: A review
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Variability and predictability of the space environment as related to lower atmosphere forcing
TL;DR: In this article, a review examines how the Earth's thermosphere and ionosphere (TI) variability is affected by processes originating from the lower atmosphere and implications for quantifying and forecasting the TI.
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Ionospheric Response to Infrasonic-Acoustic Waves Generated By Natural Hazard Events
TL;DR: In this article, the authors simulate the ionospheric responses to infrasonic-acoustic waves generated by vertical accelerations at the Earth's surface or within the lower atmosphere, using a compressible atmospheric dynamics model to perturb a multifluid ionosphere model.
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High-altitude gravity waves in the Martian thermosphere observed by MAVEN/NGIMS and modeled by a gravity wave scheme
Erdal Yiğit,Erdal Yiğit,Scott L. England,Guiping Liu,Alexander S. Medvedev,Alexander S. Medvedev,Paul R. Mahaffy,Takeshi Kuroda,Bruce M. Jakosky +8 more
TL;DR: The first high-altitude observations of gravity wave (GW)-induced CO2 density perturbations in the Martian thermosphere retrieved from NASA's Neutral Gas Ion Mass Spectrometer (NGIMS) instrument on board the Mars Atmosphere Volatile EvolutioN (MAVEN) satellite are presented and interpreted using the extended GW parameterization of Yigit et al..
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Gravity wave heating and cooling of the thermosphere: Sensible heat flux and viscous flux of kinetic energy
TL;DR: In this article, the authors used a full-wave model of the viscous damping of atmospheric gravity waves propagating in a nonisothermal atmosphere to explore the relative contributions of these sources of wave heating as a function of wave properties and altitude.
References
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A table of integrals
TL;DR: Basic Forms x n dx = 1 n + 1 x n+1 (1) 1 x dx = ln |x| (2) udv = uv − vdu (3) 1 ax + bdx = 1 a ln|ax + b| (4) Integrals of Rational Functions
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Tables of Integrals, Series, and Products
Journal ArticleDOI
Power spectrum of horizontal wind speed in the frequency range from 0.0007 to 900 cycles per hour
TL;DR: In this article, a power-spectrum analysis of horizontal wind speed is made over a wide range of frequencies by piecing together various portions of the spectrum, showing that there appear to be two major eddy-energy peaks in the spectrum.
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Turbulent flow over hills and waves
Stephen E. Belcher,J. C. R. Hunt +1 more
TL;DR: A review of the mechanisms that control neutrally stable turbulent boundary-layer flow over hills and waves, their relative magnitudes, and how they exert their greatest effects in different regions of the flow can be found in this article.