On Colour

Chromaticity diagrams represent all colours that can be perceived by the human eye. The Luv colour space (“CIE 1976”, illustrated above at a particular luminosity L) is believed to be approximately “perceptually uniform” which means…

Trees, volcanoes and climate

..large eruptions in the tropics and high latitudes were primary drivers of interannual-to-decadal temperature variability in the Northern Hemisphere during the past 2,500 years. Overall, cooling was proportional to the magnitude of volcanic forcing and…