Atmospheric gravity waves and turbulence study with acoustic Doppler sounders
نویسندگان
چکیده
منابع مشابه
Mirages with atmospheric gravity waves.
The temperature inversions that produce superior mirages are capable of supporting gravity (buoyancy) waves of very low frequency and long wavelength. This paper describes the optics of single mode gravity waves that propagate in a four-layer atmosphere. Images calculated by ray tracing show that (1) relatively short waves add a fine structure to the basic static mirage, and (2) long waves prod...
متن کاملFrom Topographic Internal Gravity Waves to Turbulence
Internal gravity waves are a key process linking the large-scale mechanical forcing of the oceans to small-scale turbulence and mixing. In this review, we focus on internal waves generated by barotropic tidal flow over topography. We review progress made in the past decade toward understanding the different processes that can lead to turbulence during the generation, propagation, and reflection...
متن کاملStochastic modelling of atmospheric gravity waves
Internal gravity waves have an important effect on the large-scale circulation of the middle atmosphere, which is conditioned by the deposition of momentum due to their breaking. The propagation of gravity waves is influenced by the properties of the background wind. This thesis examines this influence: it uses stochastic techniques to study gravity wave propagation through a randomly fluctuati...
متن کاملAngle-of-Arrival Estimation for Acoustic Waves Propagating in Atmospheric Turbulence
Atmospheric acoustic arrays are often used for localization of sound sources. However, common directionfinding algorithms do not directly compensate for the effects of an inhomogeneous propagation environment. In this paper we develop an angle-of-arrival estimator that accounts for the effects of atmospheric turbulence. The longitudinal coherence is needed for waves that arrive at oblique incid...
متن کاملData Mining for Atmospheric Gravity Waves (Lee Waves)
Gravity waves can emerge as a result of the perturbation of atmospheric circulatory systems. They encompass periodic, yet geographically stationary, changes in temperature, pressure and vertical wind components. Occurrence of such waves is frequent if strong winds hit high mountains. Secondary effect of such waves may also be encountered as clear...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1990
ISSN: 0001-4966
DOI: 10.1121/1.2028291