Numerical investigation of internal waves in jet streams including nonlinear effects

Kogan, Z. N.; Shakina, N. P.

doi:10.1007/bf02188313

Cited by 1 publication

(1 citation statement)

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“…One of the most important problems of dynamic meteorology is the generation, propagation, and decay of internal gravity waves in the atmosphere, because [4][5][6]) or the numeri cal modeling studies of mesoscale and large scale wave processes [7][8][9][10]. Far less attention is paid to observa tions of the waves in the atmosphere, their climatol ogy, and measurements of their parameters.…”

Section: Introductionmentioning

confidence: 99%

Internal gravity-shear waves in the atmospheric boundary layer from acoustic remote sensing data

Lyulyukin

Kallistratova

Kouznetsov

et al. 2015

Izv. Atmos. Ocean. Phys.

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The year round continuous remote sounding of the atmospheric boundary layer (ABL) by means of the Doppler acoustic radar (sodar) LATAN 3 has been performed at the Zvenigorod Scientific Station of the Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, since 2008. A visual analysis of sodar echograms for four years revealed a large number of wavelike patterns in the intensity field of a scat tered sound signal. Similar patterns were occasionally identified before in sodar, radar, and lidar sounding data. These patterns in the form of quasi periodic inclined stripes, or cat's eyes, arise under stable stratifica tion and significant vertical wind shears and result from the loss of the dynamic stability of the flow. In the foreign literature, these patterns, which we call internal gravity shear waves, are often associated with Kelvin-Helmholtz waves. In the present paper, sodar echograms are classified according to the presence or absence of wavelike patterns, and a statistical analysis of the frequency of their occurrence by the year and season was performed. A relationship between the occurrence of the patterns and wind shear and between the wave length and amplitude was investigated. The criteria for the identification of gravity shear waves, mete orological conditions of their excitation, and issues related to their observations were discussed.

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