Figure 2

Raw subsurface temperature comparisons. (a) Daily subsurface temperature time series from MHIA (teal) and STR (black) datasets averaged across all sites. (b) Deming regression of 3-hourly MHIA (modeled) and STR (observed) subsurface temperatures across the MHI for the full time series (2010–2017). The red line indicates the fitted linear trend and the black dashed line represents the 1:1 line. Blue contours indicate density of points (light = high density).