Institute of Geophysics, P.O. Box 600 Victoria University of Wellington, Wellington, 6014, New Zealand
Department of Geography and Geology, University of Copenhagen Oster Volgade 10, Copenhagen, DK-1350, Denmark ; Institute of Geophysics, P.O. Box 600 Victoria University of Wellington, Wellington, 6014, New Zealand
RSES, The Australian National University, Australia, Canberra, ACT 0200, Australia ; Institute of Geophysics, P.O. Box 600 Victoria University of Wellington, Wellington, 6014, New Zealand
Institute of Geophysics, P.O. Box 600 Victoria University of Wellington, Wellington, 6014, New Zealand