Hojan, M., Więcław, M.
Influence of meteorological conditions on aeolian processes
along the Polish cliff coast
This article presents aeolian landforms and meteorological
parameters affecting aeolian processes on the south Baltic coastal cliffs of
Poland. The analysis was conducted for two weather stations at different
locations. The bluffs in the vicinity of the stations have similar geological
structure, but differ in height. Velocity and direction of the wind, as well as
precipitation, are of dominating importance. Dispelling the cliff starts at
wind speeds of two–three ms-1. At this speed, the distance at which the
material is transported is short and is only a few meters, while for the
transport of fine sand and dust on the top of the bluff the wind speed must be
over 10 ms-1. It was observed that such speeds of the wind or gust are
characteristic of days with an average wind velocity of at least six ms-1. The
number of days with potential deflation on the bluff is four times higher in
the area of Ustka than in the Świnoujście region. On average, the bluff in
Ustka can be dispersed by wind throughout 33 days in a year, while the one in
Wolin in less than eight days. Erosive and accumulative eolian forms are small,
their sizes are generally less than one meter, only with rhythmic swelling to
the size of several meters.