Ming Cheng^1,2, Nicola Maher^3,4 and Michael Joseph Ellwood^1,2, (1)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (2)Australian Centre for Excellence in Antarctic Science, Canberra, ACT, Australia, (3)Australian National University, Research School of Earth Sciences, Canberra, Australia, (4)ARC Centre of Excellence for Weather of the 21st Century, Canberra, ACT, Australia