IPCC Climate Change Data: 1961-1990, Minimum Temperature

From the IPCC website: The CRU Global Climate Dataset
available through the IPCC DDC consists of a multi-variate 0.5º
latitude by 0.5º longitude resolution mean monthly climatology
for global land areas, excluding Antarctica, strictly
constrained to the period 1961-1990. The mean 1961-1990
climatology comprises a suite of eleven surface variables:
precipitation (PRE) and wet-day frequency (WET); mean, maximum
and minimum temperature (TMP, TMX, TMN); diurnal temperature
range (DTR); vapour pressure (VAP;) global radiation (RAD;)
cloud cover (CLD); frost frequency (FRS); and wind speed (WND).
The mean climate surfaces have been constructed from a new
dataset of station 1961-1990 climatological normals, numbering
between 19,800 (precipitation) and 3615 (windspeed). The station
data were interpolated as a function of latitude, longitude and
elevation using thin-plate splines. The accuracy of the
interpolations are assessed using cross-validation and by
comparison with other climatologies. this data-set has been
decsribed in: New,M., Hulme,M. and Jones,P.D. (1999)
Representing twentieth century space-time climate variability.
Part 1: development of a 1961-90 mean monthly terrestrial
climatology J.Climate 12, 829-856.