1. School of Biological, Earth and Environmental Sciences, University College Cork, T12 YN60 Cork, Ireland
2. Department of Geosciences, Penn State University, University Park, PA 16801, USA
3. School of Mathematical Sciences, University College Cork, T12 YN60 Cork, Ireland
4. Department of Geography, University College Cork, T12 YN60 Cork, Ireland
5. Environmental Research Institute, University College Cork, Lee Road, T12 YN60 Cork, Ireland