674
Climatic Geomorphology
Figure 25.30. Possible responses of dunes to changes in climate (after Rognon (1982)).
the effects of dry and wet phases (Rognon, 1980) and rapidly respond to climate changes.
If precipitation increases a little, vegetation grows up mainly in the lower parts of
the dunes, whereas in the upper parts sand mobilizes producing leeward avalanches
(Figure 25.30). When precipitation increases, vegetation colonizes the entire dune, except
the crest, and calcification starts in sandy accumulations. Finally, when periods of
Climatic Geomorphology
Figure 25.30. Possible responses of dunes to changes in climate (after Rognon (1982)).
the effects of dry and wet phases (Rognon, 1980) and rapidly respond to climate changes.
If precipitation increases a little, vegetation grows up mainly in the lower parts of
the dunes, whereas in the upper parts sand mobilizes producing leeward avalanches
(Figure 25.30). When precipitation increases, vegetation colonizes the entire dune, except
the crest, and calcification starts in sandy accumulations. Finally, when periods of