Figure 4 . Modelled horizontal wind speeds on the cliffs of Skomer. Modelled wind speeds under a) a SW and b) a NE wind direction. Mean wind speeds were reduced on leeward cliffs, increased on windward cliffs and reached their highest estimates at the crests, as expected. Winds were modelled 2 m normal to the surface and the mapped area was constrained by the 4 m and 40 m elevation contours.