Three-dimensional æolian dynamics within a bowl blowout during offshore winds: Greenwich Dunes, Prince Edward Island, Canada

摘要: Abstract This paper examines the aeolian dynamics of a deep bowl blowout within foredune Greenwich Dunes, on northeastern shore or Prince Edward Island, Canada. Masts cup anemometers and sonic were utilized to measure flow velocities directions during strong regional ESE (offshore) wind event. The across immediately separated at upwind rim crest, was strongly reversed. High, negative vertical flows occurred down downwind (but seaward) scarp which projected into separation envelope topographically forced back blowout. A pronounced, accelerated jet existed near surface basin, exhibited complex, anti-clockwise structure with near-surface following contours around basin lower slopes. Significant sediment transport whole delivered by saltation suspension out east. study demonstrates that offshore winds produce pronounced steering, separation, reversal, more complex three-dimensional motions blowout, such play notable role in transporting beyond topographic hollows foredune.