Speaker
Eleanna Asvestari
(University of Oulu)
Description
Here we present a new semi-empirical model describing modulation of galactic cosmic rays in the heliosphere. The model is an update of the previous similar model by Alanko-Huotari et al. (2006) and considers such heliospheric parameters as open solar magnetic flux, heliospheric current sheet tilt angle and the large scale solar magnetic field polarity. The model has been tested and calibrated for the period 1976 - 2013 including the very weak solar activity minimum in 2008-2010. Based on this model, and on different reconstructions of the open solar flux, the heliospheric modulation potential is reconstructed since 1610, and subsequently used to compute the production and distribution of cosmogenic radionuclides, such as 10Be and 14C. The modelled values are compared with archives from ice cores and tree rings confirming the validity of our model.
| Registration number following "ICRC2015-I/" | 73 |
|---|---|
| Collaboration | -- not specified -- |
Author
Eleanna Asvestari
(University of Oulu)
Co-authors
Gennady Kovaltsov
(Ioffe Physical-Technical Institute, St. Petersburg, Russia)
Ilya Usoskin
(University of Oulu)
