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v1
KAPLAN EXTENDED v1: Statistically homogenous concatenation of Kaplan et al [1998] OS SST and Reynolds and Smith [1994] NCEP OI analyses; the latter gets degraded to the resolution of the former
Resolution: 5x5; Longitude: global; Latitude: global; Time: [Jan 1856,Mar 2003]; monthly
v2
KAPLAN EXTENDED v2: Statistically homogenous concatenation of Kaplan et al [1998] OS SST and Reynolds and Smith [1994] NCEP OI analyses; the latter gets degraded to the resolution of the former
Resolution: 5x5; Longitude: global; Latitude: global; Time: [Jan 1856,Nov 2013]; monthly