1. School of Geography and Geosciences, University of St Andrews, St Andrews, Fife KY16 9AL, UK
2. Scottish Association of Marine Science, Scottish Marine Institute, Oban, Argyll PA37 1QA, UK
3. Department of Geography, College of Science, Swansea University, Singleton Park, Swansea SA2 8PP, UK
4. Department of Geography and Earth Science, Aberystwyth University, Aberystwyth SY23 3DB, UK
5. Department of Physical Geography and Quaternary Geology, Stockholm University, SE-10691 Stockholm, Sweden