Submitted on: 30 May 2019.
Revised on: 20 September 2019.
Accepted on: 24 October 2019.
___________________Journal of Southern Hemisphere Earth Systems Science
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Submitted on: 26 July 2010.
Revised on: 26 October 2010.
Accepted on: 25 November 2010.
___________________Journal of Southern Hemisphere Earth Systems Science
Submitted on: 23 February 2007.
Revised on: 13 April 2007.
Accepted on: 15 May 2007.
___________________Journal of Southern Hemisphere Earth Systems Science
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