Primary dunes are composed of sand blown directly from the beach face (active beach), whereas ... undertaking any development in the coastal zone. Developing this understanding of the process ...

Aa Aa Aa For large-scale coastal dune development there needs to be a suitable wind regime, large reserves of sand and suitable ... of the reflective beach also results in a zone of reduced ...

This story appears in the November 2012 issue of National Geographic magazine. I got my first lesson in the physics of sand dunes in 1998 on an expedition into the Sahara. In order to take aerial ...