Sq variability and aeronomic structure

Details Sq variability and aeronomic structure Sq variability and aeronomic structure

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37..107b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 37, Jan. 1975, p. 107-117.

Physics

5

Aeronomy, Diurnal Variations, E Region, Magnetic Variations, Solar Activity Effects, Stratosphere, Atmospheric Pressure, Geomagnetism, Ionospheric Electron Density, Magnetic Flux, Magnetic Signatures, Time Response, Vertical Distribution

Scientific paper

Evidence is presented for correlations between the day-to-day variability in the phase of the solar diurnal variation of horizontal magnetic intensity on quiet days, Sq(H), and parameters in the stratosphere and in the E-region of the ionosphere. At a midlatitude Northern Hemisphere station the diurnal minimum of Sq(H) occurs abnormally late when isobaric surfaces in the stratosphere are rising, and when the electron density of the E-layer is less than normal, and abnormally early when stratospheric and isoelectronic surfaces are falling. It is shown that the more modest variability of Sq(H) phase on normal quiet days is related to varying solar activity and seasonal changes in a consistent way, which cannot be interpreted solely on the basis of longitude shifting of the Sq current systems but requires also a skewing of the latitude axes of these systems. A similar asymmetry may be inferred for the more abnormal changes which are most marked in winter.

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