Impact of the representativeness of sites on trends. Estimated long-term changes for summertime mean of (a) Daytime average and (b) DMA8 using all 756 sites (red), and only the sites with p-value of slope of the trend within the range of [0.05, 1.00] (orange), [0.10, 1.00] (light blue) and [0.15, 1.00] (dark blue). DOI: https://doi.org/10.1525/elementa.243.f13