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Missing driver in the Sun–Earth connection from energetic electron precipitation impacts mesospheric ozone

Author

Listed:
  • M. E. Andersson

    (Earth Observation, Finnish Meteorological Institute)

  • P. T. Verronen

    (Earth Observation, Finnish Meteorological Institute)

  • C. J. Rodger

    (University of Otago)

  • M. A. Clilverd

    (British Antarctic Survey (NERC))

  • A. Seppälä

    (Earth Observation, Finnish Meteorological Institute)

Abstract

Energetic electron precipitation (EEP) from the Earth’s outer radiation belt continuously affects the chemical composition of the polar mesosphere. EEP can contribute to catalytic ozone loss in the mesosphere through ionization and enhanced production of odd hydrogen. However, the long-term mesospheric ozone variability caused by EEP has not been quantified or confirmed to date. Here we show, using observations from three different satellite instruments, that EEP events strongly affect ozone at 60–80 km, leading to extremely large (up to 90%) short-term ozone depletion. This impact is comparable to that of large, but much less frequent, solar proton events. On solar cycle timescales, we find that EEP causes ozone variations of up to 34% at 70–80 km. With such a magnitude, it is reasonable to suspect that EEP could be an important part of solar influence on the atmosphere and climate system.

Suggested Citation

  • M. E. Andersson & P. T. Verronen & C. J. Rodger & M. A. Clilverd & A. Seppälä, 2014. "Missing driver in the Sun–Earth connection from energetic electron precipitation impacts mesospheric ozone," Nature Communications, Nature, vol. 5(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6197
    DOI: 10.1038/ncomms6197
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    Cited by:

    1. Broome, James David & Cook, David & Davíðsdóttir, Brynhildur, 2024. "Heavenly lights: An exploratory review of auroral ecosystem services and disservices," Ecosystem Services, Elsevier, vol. 67(C).

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