This dataset holds Northern Hemisphere (north of 15 deg. N) daily and monthly series of 1000-500hPa Geopotential Height Thickness Daily and Monthly Series. The data is gridded on a 5x10 degree grid. The data is available for the period 1945 to 2005. The geopotential thickness between pressure levels — difference of the 1000 hPa and 500 hPa geopotential heights for example — is proportional to mean virtual temperature in that layer. The data is supplied by the Met Office, Hadley Centre.

The Met Office Hadley Centre produced the HadSLP1 dataset which replaces the Global Mean Sea Level Pressure (GMSLP) data sets, and is a unique combination of monthly globally-complete fields of land and sea pressure observations a 5 degree latitude-longitude grid from 1871 to 1998. The advantages of HadSLP1 over GMSLP2 are an improved land station data base, new interpolation scheme and the incorporation of local detail while safeguarding against random errors. Like GMSLP2, HadSLP1 was developed by Tracy Basnett and David Parker, in collaboration with R.J. Allan (previously at CSIRO and now at the Met Office) and M.J. Salinger (NIWA). Marine observations were taken from the Met Office Marine Data Bank (MDB) and from the NOAA Comprehensive Ocean-Atmosphere Data Set (COADS) (Woodruff et al, 1987). The MDB data were given priority in the blend, which is described in Basnett and Parker (1997). Land observations are a combination of data obtained from CSIRO (Australia), NIWA (New Zealand), CRU (University of East Anglia), GHCN, and operationally-received "CLIMAT" messages. The latter were used mainly for updating station series and for the Arctic. HadSLP1 pressures are reconstructed using a reduced-space optimal interpolation procedure, followed by superposition of quality-improved gridded observations onto the reconstructions to restore local detail.

The longest available instrumental record of temperature in the world is now available at the BADC. The monthly data starts in 1659. The mean, minimum and maximum datasets are updated monthly, with data for a month usually available by the 3rd of the next month. A provisional CET value for the current month is calculated on a daily basis. The mean monthly data series begins in 1659. Mean maximum and minimum daily and monthly data are also available, beginning in 1878. These historical temperature series are representative of the Midlands region in England, UK (a roughly triangular area of the United Kingdom enclosed by Bristol, Lancashire and London). The following stations are used by the Met Office to compile the CET data: Rothamsted, Malvern, Squires Gate and Ringway. But in November 2004, the weather station Stonyhurst replaced Ringway and revised urban warming and bias adjustments have now been applied to the Stonyhurst data after a period of reduced reliability from the station in the summer months. The data set is compiled by the Met Office Hadley Centre.

GICE (Global sea-Ice) is a gridded dataset of sea-ice coverage fractions covering the period 1856-February 2003. The current version of the dataset is GICE23b. GISST/GICE was originally developed as an extention to MOHSST that provided a globally complete SST analysis and sea-ice data. This is required to drive atmospheric general circulation models. GISST/GICE has now been superceeded by HadISST. We now recommend use of HadISST instead of GISST/GICE for all purposes. GICE is only still available in case it is needed for direct comparison with earlier work where GICE was used. GICE is no longer updated or developed. The sea-ice component of GISST (GICE) contains known inhomogeneities, especially in the antarctic. GISST should not be used for studies of sea-ice variability. GISST sea-ice fractions are based on a mixture of charts, satellite observations and statistical interpolations. The current version of the dataset is GICE 2.3B which was provided by the Met Office.

This dataset holds Northern Hemisphere (north of 15N) gridded (5° latitude by 10° longitude grid) series of monthly Mean Sea Level Pressure fields. The data are available for the period 1873 to 2005. The data was supplied by the Met Office, Hadley Centre.

The longest available instrumental record of temperature in the world is now available at the BADC. The seasonal data starts in 1659. The mean, minimum and maximum datasets are updated monthly, with data for a month usually available by the 3rd of the next month. A provisional CET value for the current month is calculated on a daily basis. The mean monthly data series begins in 1659. Mean maximum and minimum daily and monthly data are also available, beginning in 1878. These historical temperature series are representative of the Midlands region in England, UK (a roughly triangular area of the United Kingdom enclosed by Bristol, Lancashire and London). The following stations are used by the Met Office to compile the CET data: Rothamsted, Malvern, Squires Gate and Ringway. But in November 2004, the weather station Stonyhurst replaced Ringway and revised urban warming and bias adjustments have now been applied to the Stonyhurst data after a period of reduced reliability from the station in the summer months. The data set is compiled by the Met Office Hadley Centre.

This dataset holds Northern Hemisphere (north of 15N) gridded (5° latitude by 10° longitude grid) series of daily Mean Sea Level Pressure fields. The data are available for the period 1881 to 2005. The data was supplied by the Met Office, Hadley Centre.

GISST, (Global sea-Ice and Sea Surface Temperature) is a gridded dataset of sea-surface temperature anomalies and sea-ice coverage fractions covering the period 1871-2003. GISST was originally developed as an extention to MOHSST that provided a globally complete SST analysis and sea-ice data. This is required to drive atmospheric general circulation models. GISST has now been superceeded by HadISST. We now recommend use of HadISST instead of GISST for all purposes. GISST is only still available in case it is needed for direct comparison with earlier work where GISST was used. GISST is no longer updated or developed. GISST SSTs are based on the in-situ data set MOHSST, infilled using Empirical Orthogonal Function (EOF) interpolation. The current version of the dataset is GISST 2.3B which was provided by the Met Office Hadley Centre.

This dataset holds Northern Hemisphere (north of 15 deg. N) daily and monthly series of 500 hPa geopotential height fields. The data is gridded on a 5x10 degree grid. The data is available for the period 1945 to 2005. The data is supplied by the Met Office, Hadley Centre.

The longest available instrumental record of temperature in the world is now available at the BADC. The daily data starts in 1772. The mean, minimum and maximum datasets are updated monthly, with data for a month usually available by the 3rd of the next month. A provisional CET value for the current month is calculated on a daily basis. The mean daily data series begins in 1772. Mean maximum and minimum daily and monthly data are also available, beginning in 1878. Yearly files are provided from 1998 onwards. These historical temperature series are representative of the Midlands region in England, UK (a roughly triangular area of the United Kingdom enclosed by Bristol, Lancashire and London). The following stations are used by the Met Office to compile the CET data: Rothamsted, Malvern, Squires Gate and Ringway. But in November 2004, the weather station Stonyhurst replaced Ringway and revised urban warming and bias adjustments have now been applied to the Stonyhurst data after a period of reduced reliability from the station in the summer months. The data set is compiled by the Met Office Hadley Centre.