Environmental Engineering Reference
In-Depth Information
Figure 1
Temperature and storminess in north-west Europe. (a) The
later medieval and pre-industrial period (AD 1000-1850), from
proxy and documentary records. The broken line shows the long-
term 'mean temperature'. (b) Observed and forecast changes 1850-
2100, from direct observation and AOGCMs. Storm track activity is
shown in geopotential metres (gpm) and the broken line shows the
climate trend. Temperature forecasts after 2000 show the 'envelope
of uncertainty' dependent on the nature and extent of human and
natural systems responses.
Sources: (a) Partly after Lamb (1982), (b) partly after IPCC (2001).
DEFLATION AND ENTRAINMENT
key processes
Deflation
is the composite process by which fine-grained materials are sorted, lifted and
removed from the land surface by wind prior to their subsequent deposition downwind
