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EP: Fachverband Extraterrestrische Physik

EP 14: Poster Sonne und Heliosphäre

EP 14.8: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.V

Neutron monitor measurements of the cosmic ray maximum at the end of solar cycle 23 — •Christian Steigies¹, Karl-Ludwig Klein², Nicolas Fuller², and Rolf Bütikofer³ — ¹Christian-Albrechts-Universität zu Kiel, Germany — ²Observatoire de Paris, France — ³University of Bern, Switzerland

During the unusually long solar minimum at the end of solar cycle 23 the cosmic ray intensities as measured by several ground-based neutron monitor stations reached record intensities. In this presentation we study the long term evolution of neutron monitor data which is made available via the neutron monitor database (www.NMDB.eu). NMDB currently holds real-time data and historical data from neutron monitors in Europe and several other countries. This study takes into account the variation of cutoff rigidities at the different stations and possible other effects such as a change of the barometric coefficients for the pressure correction of neutron monitor data.