Due to technical problems on the CERN SSO system, logging in is currently failing for many users. Details on the SSB
July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Use of cosmogenic radionuclides 14C and 10Be to verify empirically reconstructed cosmic ray modulation since 1616

Aug 4, 2015, 4:00 PM
1h
Theater Foyer (World Forum)

Theater Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 48
Poster contribution SH-EX Poster 3 SH

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.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 73

Primary author

Eleanna Asvestari (University of Oulu)

Co-authors

Gennady Kovaltsov (Ioffe Physical-Technical Institute, St. Petersburg, Russia) Ilya Usoskin (University of Oulu)

Presentation materials

There are no materials yet.