Jennifer Marohasy

a forum for the discussion of issues concerning the natural environment

Archives for December 2008

Bunyips in Australian Rivers (Part 2)

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ACCORDING to Australian aboriginal mythology Bunyips are monsters that live in rivers.  According to Ron Pike, an Australian who has spent his life working with water from the Murrumbidgee River, much of what is being claimed about Australian rivers is as unreasonable as a belief in Bunyips: 

“The lack of flow volumes in the rivers of the Murray Darling Basin (MDBC) in recent years is not due to irrigation and over extraction.  The facts are that without the storages and the irrigation industries, conditions would have been considerably worse.   Throughout the MDB there is presently more wetland habitat than there would have been had there been no irrigation for the last several years.  It is also wrong to suggest that increasing stream flows by releasing extra water from storages, somehow benefits the environment.   It makes no appreciable difference to the  environment whether the Murrumbidgee at say Narrandera is running at 3,500 megalitres per day or 25,000 megalitres per day. The flows in both cases remain within the banks and do not, and cannot, water the floodplain or most wetlands.

[Read more…] about Bunyips in Australian Rivers (Part 2)

Dip in Global Sea Level Won’t Save Tuvalu

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SEA level is measured in two ways: from tidal gauges and by satellite altimeter.   According to the University of Colorado, Bolder, since August 1992 the satellite altimeters have been measuring sea level on a global basis with unprecedented accuracy and since 2005 the steady upward trend has stumbled.  

The recent dip could not qualify as a trend, but it is interesting – particularly given that atmospheric levels of carbon dioxide continue to rise.

Of course even a drop in the global sea level may not save Tuvalu because the great majority of oceanic islands, including Tuvalu, were formed by volcanic activity. While the volcanoes are active, the islands rise relative to the global averaged sea-level. When volcanic activity stops, the islands will cool and eventually start to sink. So there are islands rising and sinking all the time – and Tuvalu should be sinking.

[Hat tip to Jack Moevich for the link to the latest data on global sea levels.]

Always Scared to Death?

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With reference to the crisis in financial markets, Sydney-based think tank The Centre for Independent Studies (CIS) held a forum yesterday entitled ‘The End of Capitalism’.   

CIS Research Fellow, Dr Oliver Marc Hartwich, suggested that doom and gloom headlines in magazines such as Time, The Economist and Der Spiegel foretelling the end of capitalism were no different from other irrational scare stories.  Dr Hartwich referred several times to examples of global scares from the book ‘Scared to Death’ by Christopher Booker and Richard North.   

I am not sure that I agree with Dr Hartwich – he went as far as to suggest that with the fear of a depression we wouldn’t be hearing so much about global warming because the media could generally only focus on one major scare at a time.  But I can definitely recommend the Booker and North expose of a long list of media scare stories beginning with the great salmonella scare of 1988-89.

The book is dedicated to “all those scientists and campaigners who, amid the madness of our age of ‘scares’, have kept a sense of proportion and fought for the truth to prevail.”     

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Scared to Death, From BSE to Global Warming: Why Scares are Costing Us the Earth by Christopher Booker and Richard North, published by Continuum UK, 2007. http://www.amazon.co.uk/Scared-Death-Global-Warming-Costing/dp/0826486142