According to the unique climatic conditions
in southeastern US are also responsible for continued gully erosion.
Contrary to the northern USA climate, cold periods in the south
are short and winters are too mild to cause deeper ground freezing.
The thin surface layer (5–10 cm) of frost heaved soil becomes loose
after a few freeze thaw cycles, and can erode easily from subsequent
heavy rain or snow melt runoff. This process has been observed in
the humid continental climate of northern China