This figure is from:
Hengl, T., Heuvelink, G.B.M., Percec Tadic, M., Pebesma, E., 2011. "Spatio-temporal prediction of daily temperatures using time-series of MODIS LST images". Theoretical and Applied Climatology [1].
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Links:
[1] http://dx.doi.org/10.1007/s00704-011-0464-2
[2] http://spatial-analyst.net/book/HRclim2008
[3] http://spatial-analyst.net/book/HRtemp.R