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Data set deprecation: CRUTEM4 has been superseded by CRUTEM5.
Further use of CRUTEM4 is not recommended for purposes other than comparison with newer data sets.The data are available in two formats: either as a set of compressed plain text files in this data format, or as a set of compressed NetCDF files. Release notes for CRUTEM.188.8.131.52 can be found here. Previous versions of CRUTEM4 can be found here.
|Variable||As text||As NetCDF|
|Best estimate temperature anomalies||CRUTEM.184.108.40.206.anomalies.txt.gz||CRUTEM.220.127.116.11.anomalies.nc.gz|
|Number of observations||CRUTEM.18.104.22.168.nobs.txt.gz||CRUTEM.22.214.171.124.nobs.nc.gz|
|Temperature anomalies including biases
at the upper uncertainty range
|Temperature anomalies including biases
at the lower uncertainty range
The strengths and weaknesses of variance adjusted data are discussed in Brohan et al. (2006); please read this before using the data.
The variance adjusted dataset (CRUTEM4v) is available in the same two formats.
Global and hemispheric time series for version CRUTEM.126.96.36.199 can be found here.
The station records on which the gridded CRUTEM4 dataset is built are available in ascii format in this archive: CRUTEM.188.8.131.52.station_files.zip. This archive contains all station records used to build the CRUTEM4 dataset. Note that code previously released for CRUTEM3 cannot be used to exactly reproduce CRUTEM4 temperature series from these files due to changes in the processing methodology used.
The Met Office would like to thank the following countries' national meteorological services for kindly agreeing to the release of some or all of their climate data used in constructing the CRUTEM4 data set. Users of the data are required to abide by any additional conditions for re-use of the data requested from the national met. services as specified below.
|Country||National met. service||Additional information (including any conditions on re-use)|
|Australia||Bureau of Meteorology||Based on the original temperature observations sourced from records held by the Australian Bureau of Meteorology|
|Austria||ZentralAnstalt für Meteorologie und Geodynamik (ZAMG)||Original data available from the Historical Instrumental Climatological Surface Time Series of the Greater Alpine Region (HISTALP) project|
|Bahamas||Dept of Meteorology|
|Bahrain||Bahrain Meteorological Service (BMS)|
|Bermuda||Bermuda Weather Service (BWS)|
|Canada||Environment Canada||Data from Vincent et al. (2012) supplied by Environment Canada (EC) via a direct communication in February 2012. The EC climate series are available from http://www.ec.gc.ca/dccha-ahccd/|
|China||China Meteorological Administration (CMA)|
|Finland||Finnish Meteorological Institute (FMI)||For research purposes only|
|Gambia||Dept. of Water Resources|
|Germany||Deutscher Wetterdienst (DWD)||Agreed to release of all data classified as essential under WMO Res 40|
|Greece||Hellenic National Meteorological Service (HNMS)|
|Israel||Israel Met Service|
|Japan||Japan Meteorological Agency (JMA)||All stations under ownership of JMA, excludes two stations run by US military in Japan|
|Liberia||Ministry of Transport||For research purposes only|
|Lithuania||Lithuanian Hydrometeorological Service|
|Mauritius||Mauritius Meteorological Services||For research or educational purposes only|
|Netherlands||Newly homogenised data from Schrier et al. (2011) provided through direct communication with KNMI.|
|New Zealand||Meteorological Service of New Zealand||Original data available online from New Zealand National Institute of Water and Atmospheric Research (NIWA) online Climate Database|
|Philippines||Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA)|
|Singapore||Meteorological Services Division|
|Uruguay||Direccion Nacional de Meteorologia|
|USA||National Oceanic and Atmospheric Administration (NOAA)|
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