Speaker
Jongil Jung
(Chungnam National University)
Description
For more than half a century, Neutron monitors have recorded the flux of galactic cosmic rays. During the recent, prolonged, deep minimum in solar activity, many sources indicate that modulated galactic cosmic rays have attained new Space Age highs. However, reported neutron monitor rates are ambiguous; some record new highs while others do not. This work examines the record of 15 long-running neutron monitors to evaluate cosmic ray fluxes during the recent extraordinary solar minimum in a long-term context. We show that ground-level neutron rates did reach a historic high during the recent solar minimum, and we present a new analysis of the cosmic ray energy spectrum in the year 2009 versus year 1987. To do this, we define a reference as the average of eight high-latitude neutron monitors, four in the northern hemisphere (Apatity, Inuvik, Oulu, Thule) and four in the southern hemisphere (Kerguelen, McMurdo, Sanae Terre Adelie). In this study, we present the trend of galactic cosmic rays at the recent solar minimum.
Author
Prof.
Suyeon Oh
(Chonnam National University)
Co-authors
John W Bieber
(University of Delaware)
Jongil Jung
(Chungnam National University)
Paul Evenson
(University of Delaware)
Prof.
Yu Yi
(Chungman National University)
