Solar modulation potential based on proton proxies
This is a copy of the Supporting Information for Gieseler et al. (2017).
This data set (download at buttom of page) contains the solar modulation potential values in MV for monthly intervals from 1973-2017 derived from the proton proxies IMP-8 He and ACE/CRIS C (Phi_pp), and from Usoskin et al. (2011) as provided by http://cosmicrays.oulu.fi/phi/phi.html (Phi_Uso11). It can be used to calculate the rigidity-dependent solar modulation potential φ(P) for monthly intervals from 1973-2017 following Eq. 10 of Gieseler et al. (2017). The uncertainties of Phi_pp are given in column 4, those of Phi_Uso11 are 26 MV for the observed period. The LIS used to calculate the modulation potentials is that from Burger et al. (2000) as given by Usoskin et al. (2005).
- Column 1: Fractional year (start of interval)
- Column 2: Month
- Column 3: Phi_pp /MV
- Column 4: Uncertainty of Phi_pp /MV
- Column 5: Phi_Uso11 /MV
If you use this data, please refer to and cite BOTH following publications:
Gieseler, J., B. Heber, and K. Herbst, An empirical modification of the force field approach to describe the modulation of galactic cosmic rays close to Earth in a broad range of rigidities, J. Geophys. Res., 2017 (doi:10.1002/2017JA024763).
Usoskin, I. G., G. A. Bazilevskaya, and G. A. Kovaltsov, Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers, J. Geophys. Res., 116, A02104, 2011 (doi:10.1029/2010JA016105).
