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

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

From: A global database of lake surface temperatures collected by in situ and satellite methods from 1985–2009

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.

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