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Meteorological Investigations of the Upper Atmosphere pp 152–157Cite as

Ionospheric Winds and Associated Geomagnetic Variations

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Part of the book series: Meteorological Monographs ((METEOR,volume 9))

Abstract

Studies of geomagnetic quiet daily variations Sq are reviewed with emphasis on the relation of Sq with neutral air motions in the ionosphere. Recent analyses of global Sq and direct observations of electric currents in the ionosphere are summarized. Methods of deducing neutral winds from Sq by dynamo theory are critically examined. A wind system derived from Sq by using the height-integrated conductivity gives an effective wind system which must be interpreted with care. If actual winds vary appreciably with height, as rocket observations indicate, the effective wind system represents only weighted average winds over the dynamo region of the ionosphere, the weights being related to the conductivity distribution. However, given a theoretical wind model, Sq could provide a partial, if not complete, verification of the wind model in the dynamo region; a direct check by wind measurement with rockets, however, will require a prohibitive effort.

On leave of absence from Goddard Space Flight Center, NASA, Greenbelt, Md., at time of presentation.

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Authors and Affiliations

  1. University of Washington, Seattle, USA

    Masahisa Sugiura

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  1. Masahisa Sugiura
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R. S. Quiroz

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© 1968 American Meteorological Society

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Sugiura, M. (1968). Ionospheric Winds and Associated Geomagnetic Variations. In: Quiroz, R.S. (eds) Meteorological Investigations of the Upper Atmosphere. Meteorological Monographs, vol 9. American Meteorological Society, Boston, MA. https://doi.org/10.1007/978-1-935704-37-9_18

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  • DOI: https://doi.org/10.1007/978-1-935704-37-9_18

  • Publisher Name: American Meteorological Society, Boston, MA

  • Online ISBN: 978-1-935704-37-9

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