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Submitted on: 03 June 2000.
Revised on: 31 July 2000.
Accepted on: 26 September 2000.
___________________Earths Future---AMER GEOPHYSICAL UNION
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Submitted on: 26 October 2007.
Revised on: 05 January 2008.
Accepted on: 23 January 2008.
___________________Earths Future---AMER GEOPHYSICAL UNION
Submitted on: 04 January 2015.
Revised on: 29 April 2015.
Accepted on: 10 May 2015.
___________________Earths Future---AMER GEOPHYSICAL UNION
http://reply.papertrans.cn/1/78/7794/7794-26.png
Submitted on: 16 March 2017.
Revised on: 16 April 2017.
Accepted on: 26 April 2017.
___________________Earths Future---AMER GEOPHYSICAL UNION
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