No nitrate spikes detectable in several polar ice cores following the largest known solar events

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.