Decreasing Earthshine Could Be Tied to Global Warming - Universe Today
Astronomers can measure the reflectivity of the Earth's atmosphere by watching "Earthshine" on the Moon. They found that a gradual dimming of this light from Earth reflected against the Moon matches the warming of the planet's lower atmosphere over the last two decades. The possibility that decreased cloud cover could cause climate change is still controversial, and many scientists are skeptical about this new research. Interestingly, the astronomers who produced this recent study have found that the trend is reversing, with Earthshine increasing again.