CRU TS Version 4

From variable 3.5
Summary of observation-based historical datasets with total precipitation available.
reference

source
CRU/University of East Anglia
data type
Gridded observations
spatial domain
Global
spatial resolution
0.5 x 0.5
temporal coverage
1901-2015
time step
Monthly
data format
ASCII; NetCDF
comments
It is derived by the interpolation of monthly climate anomalies from weather station observations, using angular-distance weighting. It is using the 1961–1990 period as reference for the anomalies. The resulting gridded anomalies are converted to actual values. CRU TS4.00 is a full release, differing in methodology from the v3.24.01. release. It provides values and anomalies for total precipitation.