Environmental Engineering Reference
In-Depth Information
It is not only glacial landforms that provide an indication of former climates. In arid
and semi-arid regions there is abundant evidence of saline lakes or
playas
that have
expanded and retreated in response to climate change
Plate 9.2
Former shoreline on the Ardakan Playa, Yazd,
central Iran.
Photo: D. Mehrshahi.
(Plate 9.2). Wetter and cooler conditions will favour expansion and drier and hotter
conditions may lead to their disappearance as output through evaporation exceeds
precipitation. Sand dunes are normally associated with arid environments (except along
the coast) but in many
Figure 9.2
Active and fossil sand dune areas.
Source: Thomas (1997).
