Submitted on: 22 June 2003.
Revised on: 04 October 2003.
Accepted on: 15 November 2003.
___________________Earth Systems and Environment---SPRINGER INT PUBL AG
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Submitted on: 20 January 2002.
Revised on: 01 May 2002.
Accepted on: 01 June 2002.
___________________Earth Systems and Environment---SPRINGER INT PUBL AG
Submitted on: 14 March 2007.
Revised on: 06 June 2007.
Accepted on: 25 June 2007.
___________________Earth Systems and Environment---SPRINGER INT PUBL AG
Submitted on: 21 October 2012.
Revised on: 15 January 2013.
Accepted on: 17 February 2013.
___________________Earth Systems and Environment---SPRINGER INT PUBL AG