1 Radiocarbon Dating Laboratory, University of Waikato, Hamilton, New Zealand. alan.hogg@waikato.ac.nz.
2 School of Geography, Environment and Earth Sciences, Victoria University, Wellington, New Zealand.
3 School of Science (Earth Sciences), University of Waikato, Hamilton, New Zealand.
4 Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia.
5 GNS Science, Wairakei, New Zealand.
6 National Institute of Water and Atmospheric Research, Auckland, New Zealand.
7 Cornell Tree Ring Laboratory, Department of Classics, Cornell University, Ithaca, New York, 14853, USA.
8 National Institute of Water and Atmospheric Research, Wellington, New Zealand.
9 Department of Earth System Science, University of California, Irvine, California, USA.
10 Radiocarbon Dating Laboratory, University of Waikato, Hamilton, New Zealand.