Global surface temperature data sets 'from the fountain head' - 1850* to near present by month. HadCRUT4* near surface temperature - global temperature data set , 100 stations, by month, individually & combined in selected ways. Jan 1850 - April 2014. Space separated text format - imports cleanly to eg Excel * http://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/time_series/HadCR= UT.4.2.0.0.monthly_ns_avg.txt * Links to: - CRUTEM4 near surface air temperature anomalies over land, http://www.metoffice.gov.uk/hadobs/crutem4/ - HadSST3 sea surface temperature, 5 degree squares, 1850 - 1912. http://www.metoffice.gov.uk/hadobs/hadsst3/ Various guides and notes. (* The (or a) fountain head.) * http://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/time_series/HadCR= UT.4.2.0.0.monthly_ns_avg.txt * Quantifying uncertainties in global and regional temperature change using an ensemble of observational estimates: the HadCRUT4 data set * http://www.metoffice.gov.uk/hadobs/hadcrut4/HadCRUT4_accepted.pdf * ___________________ *HadSST3 intro notes:* Brief description of the data The SST data are taken from version 2.5 of the International Comprehensive Ocean-Atmosphere Data Set, ICOADS (external web page) , from 1850 to 2006 and on GTS observations from 2007 onwards. HadSST3 is produced (a slightly more detailed description ) by taking in-situ measurements of SST from ships and buoys, *rejecting measurements that fail quality checks, converting the measurements to anomalies by subtracting climatological values from the measurements, and calculating a robust average of the resulting anomalies on a 5=B0 by 5=B0 degree monthly grid. After gridding the anomalies, bias adjustments are applied to reduce the effects of spurious trends caused by changes in SST measuring practices. The uncertainties due to under-sampling and measurement error have been calculated for the gridded monthly data as have the uncertainties on the bias adjustments following the procedures described in the paper** For a detailed description of the dataset and its production process, please read the papers (part 1 and part = 2 ) describing the data set. We recommended you read both papers before using the data. HadSST3 construction process: http://www.metoffice.gov.uk/hadobs/hadsst3/description.html *Improving old shonky data: *Fixing up past errors and shortcomings in techniques and instrumentation. http://www.metoffice.gov.uk/hadobs/hadsst3/part_1_figinline.pdf Reassessing biases and other uncertainties in sea-surface temperature observations measured in situ since 1850, part 1: measurement and sampling uncertainties http://www.metoffice.gov.uk/hadobs/hadsst3/part_2_figinline.pdf Reassessing biases and other uncertainties in sea-surface temperature observations measured in situ since 1850, part 2: biases and homogenisation __________________ Also: ICOADS http://icoads.noaa.gov/ R **[tm]* _GW --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .