Geomagnetic control of the winter anomaly in absorption of radio waves at mid-latitudes

Details Geomagnetic control of the winter anomaly in absorption of radio waves at mid-latitudes Geomagnetic control of the winter anomaly in absorption of radio waves at mid-latitudes

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.9137s&link_type=abstract

Journal of Geophysical Research, vol. 86, Oct. 1, 1981, p. 9137-9151.

Mathematics

Logic

8

Atmospheric Attenuation, Magnetic Anomalies, Midlatitude Atmosphere, Radio Attenuation, Radio Waves, Winter, Annual Variations, Cosmic Noise, Electron Precipitation, Ionospheric Propagation, Magnetic Storms, Spatial Distribution

Scientific paper

Morphological features of the winter anomaly in radio wave absorption, that is, anomalous and large excessive absorptions of MF and HF waves occurring in groups of winter days at midlatitudes, are examined. The examination is based on absorption data sets of MF waves at three ionospheric stations and f(min) data sets at 35 stations in the Northern and Southern Hemispheres. It is found that the winter anomaly occurs simultaneously in an extensive daytime area, at least scatteringly, usually several hours to 1-3 days after the onset of an sc (or si) geomagnetic storm or storms. It is thought that the magnitude, duration, and occurrence area of the winter anomaly depend on geomagnetic activity.

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