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Category: global cooling

For more than two years a dramatic conclusion from two...

For more than two years a dramatic conclusion from two researchers at the National Solar Observatory on Kitt Peak, with offices in Tucson, has bounced around smaller news outlets and, notably, among bloggers. After analyzing 20 years of data on the magnetic field strength in sunspots - revealed by a warping of OH spectra known as Zeeman splitting - astronomers Matthew Penn and William Livingston see a trend that could have dramatic impact on Earth. This includes a possible replay of the great cooling in the 1600s and early 1700s known as the Little Ice Age - blamed on a prolonged sunspot drought and slight overall dimming of the sun, the Maunder Minimum.

A new version of the paper gets a big boost from a small but...