JISAO data
University of East Anglia / United Kingdom Meteorological Office surface temperature anomalies, 1850 - 2007
The HadCRUT3 data set is produced by the Climatic Research Unit of the University of East Anglia, United Kingdom and the Hadley Centre for Climate Prediction and Research, the United Kingdom Meteorological Office. The data is available in both ASCII and netCDF formats at the UEA, the netCDF file can be read into GrADS, and the data set is updated monthly.

Mean December through April 1997-98 anomalies (C)
global domain
big GIF | PDF | PNG | PS
Above normal surface temperatures (>1.5C) in the equatorial central and eastern Pacific, Canada, Asia, and Europe, and below normal temperatures (<-0.5C) in southern South America. Anomalies are with respect to 1961-90.

Data: The anomalies are with respect to 1961-90.

  • ASCII and netCDF files updated monthly on the UEA WWW page
  • At JISAO: /home/disk/muggy/data/gridded_land_and_ocean_temp/uea/hadcrut3.nc
  • netCDF file written at JISAO (The file is a simpler netCDF file. Both it and the native netCDF file can be read with GrADS.) All errors in the JISAO file are due to Todd Mitchell.

    References:

  • Land data and land-sea merging procedure:
    Brohan, P., J.J. Kennedy, I. Harris, S.F.B. Tett and P.D. Jones, 2006: Uncertainty estimates in regional and global observed temperature changes: a new dataset from 1850. J. Geophysical Research, 111, D12106, doi:10.1029/2005JD006548
  • Ocean data:
    Rayner, N.A., P. Brohan, D.E. Parker, C.K. Folland, J.J. Kennedy, M. Vanicek, T. Ansell and S.F.B. Tett, 2006: Improved analyses of changes and uncertainties in marine temperature measured in situ since the mid-nineteenth century: the HadSST2 dataset. J. Climate, 19, 446-469.
    The following figures document the degree of complete data in approximately 50 year epochs of the data set.
    global domain
    big GIF | PDF | PNG | PS
    Light blue is zero. Darker blue shades are not used.

    global domain
    big GIF | PDF | PNG | PS

    global domain
    big GIF | PDF | PNG | PS

    The Atlantic and equatorial Indian Oceans are observed in all three epochs. Much of the Pacific Ocean is sampled at less than 20% completeness in 1850-99. Central Africa, Tibet, northern Siberia, western interior Australia, and the Amazon are poorly sampled even in the 1900-49 epoch. The southern oceans and Arctic are poorly sampled throughout.
    January 2008
    Todd Mitchell ( mitchell@atmos.washington.edu )
    JISAO data