Richard M Teeuw, University of Portsmouth, School of Earth and Environmental Sciences, Portsmouth, PO1, United Kingdom, Simon Day, University College London, earth sciences, London, United Kingdom, Mathias Leidig, University of Portsmouth, Portsmouth, PO1, United Kingdom, Carmen Solana, University of Portsmouth, School of Earth and Environmental Sciences, Portsmouth, United Kingdom, Mohammad Heidarzadeh, University of Tokyo, Bunkyo-ku, Japan and Martin Schaefer, University of Portsmouth, Geography, Portsmouth, United Kingdom