CRUTEM4 station file format --------------------------- The CRUTEM4 station files contain monthly average temperature data for each station in the CRUTEM4 database. An example of the CRUTEM4 station data file format is given below: --------------------------- Number= 037760 Name= LONDON/GATWICK Country= UK Lat= 51.2 Long= 0.2 Height= 59 Start year= 1961 End year= 2012 First Good year= 1961 Source ID= 10 Source file= Jones Jones data to= 2012 Normals source= Data Normals source start year= 1961 Normals source end year= 1990 Normals= 3.8 3.9 5.8 8.0 11.3 14.4 16.5 16.2 13.8 10.8 6.6 4.7 Standard deviations source= Data Standard deviations source start year= 1961 Standard deviations source end year= 1990 Standard deviations= 2.1 2.0 1.3 0.9 1.1 1.2 1.3 1.2 1.0 1.2 1.1 1.7 Obs: 1961 3.9 7.1 7.5 10.3 11.0 14.7 15.9 16.1 15.7 10.9 6.4 2.7 501 501 501 501 501 501 501 501 501 501 501 501 1962 4.1 4.5 2.5 7.6 9.8 13.0 15.1 14.7 12.6 10.5 5.9 1.7 501 501 501 501 501 501 501 501 501 501 501 501 1963 -2.7 -0.8 6.2 8.6 10.3 14.7 15.1 14.5 13.1 10.3 8.5 2.0 501 501 501 501 501 501 501 501 501 501 501 501 --------------------------- Notes: * Number is a station identifier (usually the number assigned by the WMO). * Long is the longitude of the station. Negative values are east. * Height is in metres. * First Good Year - data before that year are suspect. * Source ID is an indicator of the source of the data. * Source File and Jones data to are internal flags relating this file to other systems. * Normals and standard deviations are produced and used as described in the data set papers. One value for each calendar month (Jan-Dec) in Celsius. * Obs (short for Observations) are monthly average temperatures, in Celsius - one row for each year: - The first column is the year. - The following 12 columns are temperatures for each calendar month (Jan-Dec). - The last 12 columns indicate data sources for monthly updates for each calendar month (Jan-Dec) - see 'Data sources' below. * A temperature value of -99 indicates missing data. Data sources: * 501 - Update of the CRUTEM4 database provided by CRU -10/09/2012 - see release notes for version CRUTEM.4.1.1.0 * 502 - Update of the CRUTEM4 database provided by CRU -16/04/2013 - see release notes for version CRUTEM.4.2.0.0 * 900 - CLIMAT data quality controlled and added by the UKMO in monthly updates * 902 - MCDW (Monthly CLimatic Data for the World) data added by the UKMO in monthly updates --------------------------- Code: Code will soon be provided to enable users to make gridded fields and calculate a global average temperature anomaly time series from the station data provided here. This code is to be released under an Open Source licence that is contained as comments in the code. By running the code you indicate your acceptance of the licence. Note that revisions have been made to the gridding and time series calculation procedures used in construction of CRUTEM4, as described in Jones et al. (2012). Code provided for CRUTEM3 cannot reproduce the CRUTEM4 results.