This web page's content and links are no longer actively maintained. It is available for reference purposes only. NASA Official: Luke Oman
 

PEM

Ionization Map

The atmospheric ionization rate measured by PEM near the peak of solar cycle 22. The ionization is caused by fast downward-moving electrons from the magnetosphere impacting air molecules. Green and yellow represent larger amounts of ionization; blue and black represent smaller amounts of ionization.

Ionization Map

Solar Cycle Variations in Ion Production

The change in ion production rate from energetic particles as measured by PEM over an 11-year solar cycle. Fast downward-moving electrons from the magnetosphere create ions. The ion production rate varies by a factor of 50 to 200 near solar minimum (blue line) to near solar maximum (red line). The high-energy electrons can cause ozone decreases in the polar mesosphere by producing nitrogen and hydrogen radicals.

Ion Production Diagram

 

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Web Curator: Monica Todirita, (Science Systems Applications, Inc) (todirita@umpgal.gsfc.nasa.gov)
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Last modified: March 08, 2017