What are the basic raw data used for the observed time-series?
The observed grids are based on extensive databases of monthly measurements of climate at individual stations. These databases are the work of a number of individuals in the Climatic Research Unit over many years, and rank among of the best in the world. These databases are not in the public domain, not least because of the restrictions on any redistribution of data that are imposed upon us by those who supply us with station data. Station coverage is denser over the more populated parts of the world, particularly the United States, southern Canada, Europe and Japan. Coverage is sparsest over the interior of the South American and African continents. These databases have been subjected to homogeneity checks, but not to the same extent as the databases underlying the coarser grids of Jones or Hulme. [based partly on the Phil Jones FAQ] No other sources of data are used to construct the climate grids. There is no satellite information included. There is no remote sensing information incl
