Sarah L Nicholas, Brookhaven National Laboratory, National Synchrotron Light Source II, Upton, NY, United States, Darius Ceburnis, National University of Ireland, School of Physics, Galway, Ireland, Maija Iris Heller, Pontificia Universidad Católica de Valparaíso Chile, Escuela de Ciencias del Mar, Valparaiso, Chile, Matthew A Marcus, Lawrence Berkeley National Laboratory, Advanced Light Source, Berkeley, United States, Geraldine Sarthou, IUEM Institut Universitaire Européen de la Mer, LEMAR, CNRS, Plouzané, France and Peter L Croot, iCRAG (Irish Centre for Research in Applied Geosciences), Earth and Ocean Sciences, School of Natural Sciences and the Ryan Institute, National University of Ireland Galway, Galway, Ireland