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. 2015 Mar 17;2:150008. doi: 10.1038/sdata.2015.8

Figure 3. Linear interpolation was used to calculate daily temperature estimates for July, August, and September for each in situ sampled lake.

Figure 3

The mean summer temperature for each lake was then calculated by taking the mean of those daily estimates. The figure shows interpolation conducted with temperature measurements conducted at an interval of once every 10 days (panel a), once every 20 days (panel b), or once every 30 days (panel c). At high sampling intervals (panel c), linear interpolation can underestimate daily temperatures, leading to an underestimate of the mean summer temperature.