A clean atmosphere causes global warming

11/26/2018 19:25 - Posted by Tom van Leeuwen
When the atmosphere is clean, more sunlight will come in, warming the earth.

On Sept. 27th 2015, millions of people around the world watched the Moon pass through the shadow of our planet. Most agreed that the lunar eclipse was darker than usual. Little did they know, they were witnessing a sign of global cooling.

Lunar eclipses offer a perfect opportunity to measure the transparency of Earth's atmosphere. When the atmosphere is clean, the moon will appear bright orange. A dark red color indicates the presence of volcanic ashes and other aerosols in the stratosphere.
This is clearly visible on the figure above, made by atmospheric scientist Richard Keen of the University of Colorado. The 1992 lunar eclipse happened just after Philippine volcano Pinatubo spewed millions of tons of gas and ash into the atmosphere.

“Based on the color and brightness of recent eclipses, we can say that Earth’s stratosphere is as clear as it has been in decades. There are very few volcanic aerosols up there,” Richard Keen explains.
“In other words,” he adds, “over the past 40 years, the decrease of volcanic aerosols and the increase of greenhouse gases have contributed equally to the total warming (~0.3 °C) observed in global satellite temperature records.”

This is bad news for the global warming environmentalists. Around half of the observed warming they're so afraid of might be caused by a cleaner atmosphere and not by the increasing CO2 concentration as they want to make us believe.

More information: Climate scientist: air pollution cleanup may be major driver of global warming