Department of Earth Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China;
Department of Geography and Centre for Geo-computation Studies, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China;
Department of Earth Sciences, University of Toronto, Toronto, ON M5S 2M8, Canada;
Department of Earth Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China;
Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China;