|Met Office Hadley Centre observations datasets|
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The data are available in NetCDF format or as a set of compressed plain text files in
this data format. Please click here to see a sample of the plain text data.
If you have any difficulties downloading or unpacking the data from this page, please contact us.
Updated May 2015
These data cover the years 1950-2014 inclusive and are anomalies relative to the 1961-90 daily means.
|NetCDF Tmax and Tmin anomalies||HadGHCND_TXTN_anoms_1950-2014_15052015.nc.tgz||~111Mb|
|Plain text Tmax anomalies||HadGHCND_TX_anoms_1950-2014_15052015.tar.gz||~67Mb|
|Plain text Tmin anomalies||HadGHCND_TN_anoms_1950-2014_15052015.tar.gz||~66Mb|
Updated October 2015
These are actual temperatures covering the period 1950-2014 inclusive. They were produced by combining the gridded anomalies (above) with grids representing the 1961-1990 mean climatology for each gridbox for each day of the year. We do not adjust the normals at each station before interpolation, and therefore these grids may be less representative over areas with large spatial variability in climate, such as regions with large variations in topography.
|NetCDF Tmax and Tmin actuals||HadGHCND_TXTN_acts_1950-2014_15102015.nc.tgz||~124Mb|
|Plain text Tmax anomalies||HadGHCND_TX_acts_1950-2014_15102015.tar.gz||~74Mb|
|Plain text Tmin anomalies||HadGHCND_TN_acts_1950-2014_15102015.tar.gz||~73Mb|
Added May 2015
Temperature extremes indices based on the definitions for the ETCCDI indices have been produced from HadGHCND. These were calculated using the HadGHCND gridded actual temperatures. Please see the ETCCDI definitions page for more information about the indices. Note that these files are in NetCDF format and provided in association with the CLIMDEX project.
|Extremes Index||Description||Compressed NetCDF|
|TX90p||Frequency of warm days||HadGHCND_1949-2011_TX90p.nc.gz|
|TX10p||Frequency of cold days||HadGHCND_1949-2011_TX10p.nc.gz|
|TN90p||Frequency of warm nights||HadGHCND_1949-2011_TN90p.nc.gz|
|TN10p||Frequency of cold nights||HadGHCND_1949-2011_TN10p.nc.gz|
|DTR||Daily Temperature Range||HadGHCND_1949-2011_DTR.nc.gz|
|GSL||Growing Season Length||HadGHCND_1949-2011_GSL.nc.gz|
|WSDI||Warm Spell Duration Index||HadGHCND_1949-2011_WSDI.nc.gz|
|CSDI||Cold Spell Duration Index||HadGHCND_1949-2011_CSDI.nc.gz|
The version of the HadGHCND dataset used for analyses in the IPCC Fifth Assessment Report (AR5) is available below. These files were created in July 2012 and cover the years 1950-2011 inclusive. The temperature anomalies are given relative to the 1961-90 daily means.
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