Quasi-biennial oscillation in ionospheric parameters measured at Juliusruh (55 deg N, 13 deg E)

Details Quasi-biennial oscillation in ionospheric parameters measured at Juliusruh (55 deg N, 13 deg E) Quasi-biennial oscillation in ionospheric parameters measured at Juliusruh (55 deg N, 13 deg E)

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jatp...57..415k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 57, no. 4, p. 415-419

Physics

7

Ionospheres, Magnetic Effects, Oscillations, Periodic Variations, Solar Cycles, Temperate Regions, Germany, Solar Flux, Sunspots, Zonal Flow (Meteorology)

Scientific paper

When seasonal variations were eliminated by evaluating 12-month running means, the ionospheric parameters foE, foF2 and hmF2 at Juliusruh (54.6 deg N, 13.4 deg E) showed large solar cycle variations. However, when further 3-yr running averages were evaluated and subtracted, QBO (Quasi-biennial oscillations) were noticed in all these parameters. Sunspot series did not reveal a QBO, but geomagnetic Ap did show a QBO. The peaks of the ionospheric QBO and QBO of Ap could be roughly compared, with lags or leads of a few months. Also, these compared roughly with the well-known QBO peaks of tropical stratospheric (50 mb) zonal winds. Similar analyses at other locations are warranted.

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