Brighter sunlight? The brightness of sunlight at the earths surface changes4STEPover
Chapter 0, Problem 4.38(choose chapter or problem)
Brighter sunlight? The brightness of sunlight at the earths surface changes4STEPover time depending on whether the earths atmosphere is more or less clear.Sunlight dimmed between 1960 and 1990. After 1990, air pollution dropped inindustrial countries. Did sunlight brighten? Here are data from Boulder, Colorado,averaging over only clear days each year. (Other locations show similar trends.)The response variable is solar radiation in watts per square meter.12
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