Coherence of temporal variations (2-30 days) in the wind field of the mid-latitude middle atmosphere of the Earth

Dmitry V. Korotyshkin; Antonina N. Fahrutdinova

doi:10.1117/12.606350

15 December 2004 Coherence of temporal variations (2-30 days) in the wind field of the mid-latitude middle atmosphere of the Earth

Dmitry V. Korotyshkin, Antonina N. Fahrutdinova

Author Affiliations +

Proceedings Volume 5743, Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; (2004) https://doi.org/10.1117/12.606350
Event: Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2004, Tomsk, Russian Federation

Abstract

Current work is dedicated to the investigation of the coherency between wave processes at heights of lower and middle atmospheres of the Earth in the field of background circulation. In this work the comparison between temporal variations of the wind velocity on heights of the mesosphere - lower thermosphere (MLT) and on heights of the troposphere and the stratosphere is accomplished. For analysis we used data of wind measurements accomplished during 1986-2004 at meteor radar of Kazan University (56N,49E). Also we used data of BADC UK MO¹ containing wind velocity in nodes of the longitudinal - latitudinal grid (96x72). Data of BADC UK MO are exposed to the spatial filtering. This allowed time series of complex amplitude of spatial waves with wave numbers 1-8. Performed analysis of wind data by the coherency spectra between this time series and time series of the wind velocity for heights of MLT allowed the detection of wave trains with specific periods close to Rossby waves (2,5, 10 days) and to long-period waves (15-30 days) with significant coherency between variation on different height levels. Height profiles of the coherency phase showed the propagation direction and vertical wave length of the corresponding wave trains. The work has been performed under the support of Ministry of Education of Russian Federation, grant A03-2.13-513.

Citation Download Citation

Dmitry V. Korotyshkin and Antonina N. Fahrutdinova "Coherence of temporal variations (2-30 days) in the wind field of the mid-latitude middle atmosphere of the Earth", Proc. SPIE 5743, Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, (15 December 2004); https://doi.org/10.1117/12.606350

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