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Term: Polar cap absorption Class:  
 vernacular   (0%)
Created 6 June 2017
Last modified 6 June 2017
Contributed by GCW Glossary

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  n2t.net/ark:/99152/h3056

Definition: Effect on radio waves in high latitudes, caused by a sudden increase in the electron concentration in the D layer of the ionosphere. The effect is produced by the influx of high energy solar protons; it begins a few hours after a solar flare is observed and may in exceptional cases persist for a few days.  WMOMeteoterm 

 GCW 
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