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What surface data is used in globally gridded temperature anomalies?

April 26, 2017anomalies Data globally gridded temperature Used

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What surface data is used in globally gridded temperature anomalies?

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GISS GISTEMP mostly uses GHCN unadjusted data. In addition, it swaps in USHCN data for the United States. It also adds SCAR Antarctic data and data for Hohenpeissenburg. NOAA NCDC uses GHCN data with adjustments. Hadley CRU gathers data from National Meteorological Centers, which largely mirrors the GHCN data set, and combines that with data from other sources.