Met Office Hadley Centre observations datasets
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Daytime and nighttime observational experiments

Daytime and nighttime seasonal temperature anomalies (relative to a 1981-2000 climatology) for the period 1958 to 2003 at 12 pressure levels (850, 700, 500, 400, 300, 250, 200, 150, 100, 70, 50 and 30 hPa) were input into the system during each experiment. These were derived from raw daily data that were input into the RAdiosonde OBservation COrrection using REanalyses (RAOBCORE) data set. This data set is a merge of radiosonde ingest to ERA-40 and the Integrated Global Radiosonde Archive (IGRA), with preference given to ERA-40 ingest data. An ensemble of 100 random experiments were performed on both the daytime and nighttime data using the parameter settings listed here. The same 100 experimental setups were also used in the error model validation experiments. For more information about the input data, system settings and experiments see Titchner et al. (2009) and McCarthy et al. (2008).

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