1. GNS Science, Avalon, Lower Hutt 5010, New Zealand
2. Department of Geology University of Tromsoe; Dramsveien 201 Tromsø 9037, Norway
3. GNS Science, Avalon, Lower Hutt, New Zealand
4. School of Environment, The University of Auckland, Auckland, New Zealand
5. GEOMAR, Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
6. National Institute of Water & Atmospheric Research; Wellington New Zealand
7. Center for Arctic Gas Hydrate, Environment and Climate, University of Tromsoe, Norway
8. Shell Perth WA Australia