The data are of Global Preciptation Climatology Project Version 2.2,
downloaded from a NASA/GSFC web page.
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(Last modified: 2013/04/25)
(Last modified: 2013/04/26)
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(Last modified: 2014/12/24)
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The figure is also available in PDF. (Last modified: 2014/03/26)
(Last modified: 2011/09/20)
(Last modified: 2011/09/21)
(Last modified: 2013/05/08)
(Last modified: 2013/05/08)
PDF.
(Last modified: 2013/11/04)