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A simple timing criterion was used, counting 90°E-90°W as daytime for 1200 UTC and nighttime for 0000 UTC, and vice versa for all other longitudes. Only stations between 70°N and 70°S were included, to limit the seasonality of polar day and night.

Daytime and nighttime observational experiments - observational input data, and experiment adjustments and trends from Titchner et al. (2009).
Daytime and nighttime validation experiments - error model input data, and experiment adjustments and trends from Titchner et al. (2009).

Click here for data from merged (0000 UTC and 1200 UTC) observational data experiments (used for Guo et al., 2008).

Click here for data used to derive the trends in Thorne et al. 2011. (Warning, large file - 690Mb .tgz)

Click here for trend uncertainties derived in Thorne et al. 2011.

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