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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (998696)	2/4/2017 12:22:51 PM
From: Wharf Rat	Read Replies (1) \| Respond to of 1573924

"the greater smog coming from Asia can't cool the whole planet like ours could." What makes you think it isn't slowing down warming? In Dec 1970, CO2 was 325.13; in 2016, 404.48. That's a lot more forcing to overcome. carbonify.com Here's what happens when you begin to clear the air.. Airplane contrails and their effect on temperatures Sept. 11, 2001 presented a unique opportunity to study what the sky looked like without airplanes and contrails. In the wake of the 9-11 terrorist attacks, the FAA prohibited commercial aviation over the United States for three days. That's when David Travis, an atmospheric scientist at the University of Wisconsin, Whitewater, thought to look at how temperatures might differ at temperature stations around the country. He found that [PDF], for those three days, the average range between highs and lows at more than 4,000 weather stations across the US was 1 degree C wider than normal. In other words, contrails seemed to raise nighttime temperatures and lower daytimes ones. But the real effect was in daytime highs, which were much higher. That would seem to indicate that, contrary to prevailing thinking, contrails might have a net cooling effect. csmonitor.com