Mathematics – Logic
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..599l&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 8, Sept. 1990, p. 599-608.
Mathematics
Logic
5
Annual Variations, Lower Ionosphere, Meteorological Parameters, Radio Waves, Solar Activity, Data Correlation, Variance (Statistics), Wind (Meteorology)
Scientific paper
Twenty-one ionospheric, neutral atmospheric, solar, and geomagnetic quantities are studied for the midlatitude lower ionosphere during the 1983-1984 winter. The ionospheric data cover the European area between 38-55 deg N and 5 deg W-39 deg E, with one data set also covering Central China. The lower ionosphere over Europe is found to be governed by neutral atmosphere variability (variability of the polar vortex). The Chinese data display the important role of solar activity without any influence of the winter polar vortex. The European ionospheric data are divided into two groups according to altitude, not latitude or longitude, in spite of a large latitudinal and longitudinal extent of ionospheric observations. The opposite response displayed by the two groups of data to the meridional wind variability near 95 km appears to be the cause of the division of the ionospheric data.
Lastovicka Jan.
Pancheva Dora
Zhang Jia-Xiang
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