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HadCRUT3 Land- and Sea-Surface Temperature Calculations
For a description of the HadCRUT3 Land- and Sea-Surface Temperatures data set, visit the UK Met Office website (http://hadobs.metoffice.com/hadcrut3/).
To calculate a trend, input a period of record, a latitude range and a longitude range. If you are unsure how and what to enter for these terms, click here. Results will be returned in approximately 10 to 20 seconds after you have entered these parameters and clicked on the "Calculate trend" button below.