HadUK-Grid Frequently Asked Questions
effect of urban or forested areas. The speeds are in m/s (1 m/s = 1.94 knots = 2.24 mph). Why is the period 1961 to 1990 used for the long-term averages? The 30-year period 1961 to 1990 has been designated as the international standard reference period for climate change assessment by the World