Solar proton events recorded in the stratosphere during cosmic ray balloon observations in 1957-2008

Details Solar proton events recorded in the stratosphere during cosmic ray balloon observations in 1957-2008 Solar proton events recorded in the stratosphere during cosmic ray balloon observations in 1957-2008

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010adspr..45..603b&link_type=abstract

Advances in Space Research, Volume 45, Issue 5, p. 603-613.

Physics

5

Scientific paper

Long-term balloon observations have been performed by the Lebedev Physical Institute since 1957 up to the present time. The observations are taken several times a week at the polar and mid latitudes and allow us to study dynamics of galactic and solar cosmic ray as well as secondary particle fluxes in the atmosphere and in the near-Earth space. Solar energetic particles (120) - mostly protons - (SEP) events with >100 MeV proton intensity above 1 cm-2 s-1 s-1 were recorded during 1958-2006. Before the advent of the SEP monitoring on spacecraft these results constituted the only homogeneous series of >100 MeV SEP events. The SEP intensities and energy spectra inferred from the Lebedev Physical Institute observations are consistent with the results taken in the adjacent energy intervals by the spacecraft and neutron monitors. Joint consideration of the SEP events series recorded by balloons and by neutron monitors during solar cycles 20-23 makes it possible to restore the probable number of events in solar cycle 19, which was not properly covered by observations. Some correlation was found between duration of SEP event production in a solar cycle and sunspot cycle characteristics.

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