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

To: i-node who wrote (877042)	8/1/2015 1:48:54 AM
From: Wharf Rat	Respond to of 1576972

Who needs excuses, when we can actually see the results of removing pollution in real time? Global dimming, although itself a great risk to humanity, seems to have been protecting us from an even greater one. As we reduce the dimming through cleaner burning of fuels, something more catastrophic could be awaiting us. An experiment by Dr. David Travis from the University of Wisconsin on airplane vapor trails provides a foretaste. To find out how big an effect the vapor trails were having on the amount of sunlight reaching the earth's surface, he would have had to ground all of the planes in the sky on any given day and perform measurements. This nationwide landing of all flights never occurred, except for a few days after 9/11. Travis burst into action and gathered temperature range records from weather stations from 48 states. The temperature range, which is the difference between the highest temperature during the day and lowest during the night, changes very slowly. Travis found that during the three days that flights were grounded across the US, there was a marked rise in the air temperature, presumably due to global dimming. During the grounding, the temperature range jumped by over one degree Celsius. It was the single largest temperature spike in the last 30 years. If just the removal of airplanes could cause this much of a temperature swing, scientists are worried that the overall effect of global dimming on world temperatures could be enormous huffingtonpost.com