Annual Global Land Surface Mean Temperature Anomalies
Version 2 of GHCN includes previously unavailable Colonial Era data that fill in data sparse times and places. Objective homogeneity adjustments were applied to all long-term stations. GHCN's unique duplicate preservation scheme preserved the integrity of the input data streams. A First-Difference area averaging technique maximizes the global data available for analysis and takes the place of deriving anomalies from a climatological reference period. Updates for December data were provided by the NOAA/NWS Climate Prediction Center from GTS CLIMAT reports. An update system for GHCN developed at NCDC subjects the most recent data to the same final quality control as the historical data.
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Last Updated Wednesday, 20-Aug-2008 12:21:48 EDT
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