The Origin of Aeolian Dunes - PIV measurements of flow structure associated with early stage protodune development in a refractive-index-matched flume

Nathaniel Bristow1, Jim Best2, Kenneth T Christensen1, Matthew C Baddock3, Giles Wiggs4, Pauline Delorme5 and Joanna M Nield6, (1)University of Notre Dame, Notre Dame, IN, United States, (2)Univ. Illinois at Urbana Champaign, Geology, Geography & GIS, Mechanical Science and Engineering and Ven Te Chow Hydrosystems Laboratory, Champaign, IL, United States, (3)Loughborough University, Geography, Loughborough, United Kingdom, (4)University of Oxford, School of Geography and the Environment, Oxford, United Kingdom, (5)University of Southampton, Southampton, United Kingdom, (6)University of Southampton, Southampton, SO14, United Kingdom