Global sampling

Timeseries of global sampling completeness over time for GHCNMv3 (black) and the databank release (red). The globe has been split into 5 degree boxes and a single station at a timestep denotes data for that box. Boxes are defined as land if they contain any land. So to get to 100% would require sampling all small islands and all of Greenland, Antarctica, the Sahara etc. at least once each 5 degree box.

Global sampling