Climate Change And Development Are Putting Pressure On Water Supplies In The 25-40oS Climate Zone | 2438
Journal of Earth Science & Climatic Change
Like us on:
Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.
Warm air rising from tropical areas descends in the 25 to 40o
S latitudinal zone being further north
in winter and south in summer. This descending arm of the Hadley Cell is associated with dry conditions
and deserts around the southern hemisphere ? the Kalahari in southern Africa, the central Australian
desert and the Atacama in Chile, South America. Global warming may be broadening the width of
the zone?s high pressure cells thereby displacing low pressure systems further south. Some parts of
the region have already experienced drier conditions which have affected water supplies, especially in
south-western Australia where the ozone hole over Antarctica may be producing an additional effect.
These regions are also growing very rapidly, partly because they all contain abundant mineral resources.
The combination of drier conditions and growth is placing pressures on water supplies in countries
within this zone. Transferring water from wetter areas to the north or south is very expensive and
energy intensive as is desalination of seawater, both of which have been promoted as solutions to the
growing water deficit. Both solutions contribute carbon dioxide emission and potentially will enhance
global warming unless renewable sources of energy are used. The relative cost of these two solutions
will increasingly depend on technological improvements. The talk will compare and contrast options
across all three continents.
Dr. Don McFarlane gained his PhD in hydrogeology at the University of Western Australia in 1985. After a period in
the state government where he managed state water policy and planning he took up a position in CSIRO to coordinate
the Water for a Healthy Country Flagship in Western Australia. This paper reports work on four Sustainable Yield projects
in Australia, work in the Copiap? River Basin in Chile and results reported by colleagues in Southern Africa. In 2004 he
was awarded the CSIRO Chairman?s Medal for his contribution to the mapping and monitoring of dryland salinity and
Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals