1. GNS Science, Lower Hutt 5010, New Zealand
2. CIRES, University of Colorado at Boulder, Boulder, CO, USA
3. Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
4. Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo, São Paulo, Brazil
5. Greater Wellington Regional Council, Wellington, New Zealand
6. National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand