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Solar proton events in cosmogenic isotope data
Author(s) -
Usoskin Ilya G.,
Solanki Sami K.,
Kovaltsov Gennady A.,
Beer Jürg,
Kromer Bernd
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl026059
Subject(s) - cosmic ray , solar energetic particles , proton , atmosphere (unit) , isotope , cosmogenic nuclide , physics , astronomy , astrophysics , environmental science , coronal mass ejection , solar wind , nuclear physics , meteorology , plasma
A possible contribution of solar energetic particle events to the production of cosmogenic 10 Be and 14 C in the atmosphere is studied. The solar particle effect is negligible in the 14 C data, but extreme events may be detectable in high‐resolution 14 C data. Although the overall effect is small in the 10 Be data, strong events may contribute notably on the inter‐annual time scale. In combination with the 11‐year solar modulation of galactic cosmic rays, it may lead to an intermittent 5.5‐year periodicity, which is seen in high resolution 10 Be data. We have identified ten episodes during 1750–1950 when 10 Be may hold signatures of strong solar proton events. This opens a new possibility to study extreme solar particle events in the past using high resolution cosmogenic isotope data.