Characteristic scales and horizontal asymmetry of jet streams in the Earth’s atmosphere
| Autor: | R. V. Ivangorodsky, A. F. Nerushev, M. V. Kalashnik |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Atmospheric Science Jet (fluid) 010504 meteorology & atmospheric sciences 010505 oceanography Astrophysics::High Energy Astrophysical Phenomena media_common.quotation_subject Geophysics Jet stream Oceanography Atmospheric sciences 01 natural sciences Asymmetry Physics::Geophysics Rossby number Atmosphere Potential vorticity Wind shear High Energy Physics::Experiment Physics::Atmospheric and Oceanic Physics Geostrophic wind 0105 earth and related environmental sciences media_common |
| Zdroj: | Izvestiya, Atmospheric and Oceanic Physics. 53:156-163 |
| ISSN: | 1555-628X 0001-4338 |
| DOI: | 10.1134/s0001433817020062 |
| Popis: | Wind-speed distributions in atmospheric upper air jet streams have a horizontal asymmetry: the wind shear on the northern (cyclonic) side of the jet is larger than that on the southern (anticyclonic) side. The paper suggests an explanation of this feature on the basis of the theory of nonlinear geostrophic adjustment. Simple theoretical estimates are obtained for the asymmetry coefficient of the speed profile. It is shown that the asymmetry increases with the Rossby number (with a jet-stream velocity). Results of the statistical analysis of the horizontal asymmetry of jet streams from Earth’s satellite measurements are described. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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