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On the atmospheric tidal wind variations at meteor heights

Über atmosphärische Gezeitenwindänderungen in 95 km Höhe

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Summary

Monthly averages of the zonal and meridional neutral wind data recorded over Obninsk (55°N), Heiss Island (805°N) and Molodezhnaya (67°S), using meteor radar technique, during the period 1967–71 are analyzed in detail in terms of prevailing and periodic components. Results of the geographical variation of the data reveal the presence of comparatively higher amplitudes of the wind components at Molodezhnaya station. It is observed that higher amplitudes of the semi-diurnal component are mostly associated with lower phases at all the three stations. The momentum flux due to the diurnal and semi-diurnal wind components are calculated for all the seasons at each site. The results are compared with the measurements made at other latitudinal stations.

Zusammenfassung

Es werden Monatsmittel der mit Radarmessungen von Meteoritenbahnen über Obninsk (55°N), Heiss Island (80,5°N) und Molodeshnaya (67°S) in den Jahren 1967 bis 1971 gemessenen zonalen und meridionalen Windbeobachtungsdaten in bezug auf vorherrschende und periodische Komponenten analysiert. Aus den geographischen Unterschieden der Beobachtungsdaten ergeben sich verhältnismäßig größere Amplituden an der Station Molodeshnaya. Es wurde beobachtet, daß an allen drei Stationen größere Amplituden der halbtägigen Komponente meist mit kleineren Phasen verbunden sind. Für alle Jahreszeiten wird für jede Station der Impulsfluß zufolge der täglichen und halbtägigen Windkompo nente berechnet. Die Ergebnisse werden mit Messungen an Stationen in anderen Breiten verglichen.

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Authors and Affiliations

  1. Space Research Laboratories, Department of Physics, Andhra University, Visakhapatnam, India

    P. C. S. Devara &  M. I. Ahmed

  2. Indian Institute of Tropical Meteorology, Ramdurg House, University Road, 411005, Poona, India

    P. C. S. Devara

  3. School of Geophysical Sciences, Georgia Institute of Technology, 30332, Atlanta, GA, USA

    M. I. Ahmed

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  1. P. C. S. Devara
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Devara, P.C.S., Ahmed, M.I. On the atmospheric tidal wind variations at meteor heights. Arch. Met. Geoph. Biocl. A. 31, 35–47 (1982). https://doi.org/10.1007/BF02257740

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  • DOI: https://doi.org/10.1007/BF02257740

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