Mekhaldi, F., McConnell, J. R., Adolphi, F., Arienzo, M. M., Chellman, N. J., Maselli, O. J., Sigl, M., Muscheler, R. (2017). No nitrate spikes detectable in several polar ice cores following the largest known solar events, 2017 EGU General Assembly: Vienna, Austria, April 23, 2017-April 28, 2017, Session No. EGU2017-14979.