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POPS Jet traffic affecting climate
"I remember walking to and from my office and thinking how incredibly clear the skies were," recalls Carleton. He mentioned this to a colleague and former Ph.D. student of his, David Travis of the University of Wisconsin, who had noticed the same thing. "Then we started thinking that we should look at the temperature conditions" during those days in September and compare them to years past, Carleton says. Looking at daytime highs and nighttime lows, Carleton and Travis found the average daily temperature range across the no-fly period to be almost 2 degrees Fahrenheit larger than when jets do fly. This implies, Carleton explains, that contrails lower daytime maximum temperatures and increase nighttime low temperatures—probably in the same way that cirrus clouds do, by blocking some solar radiation from reaching earth's surface during the day, and insulating against heat loss at night. Since finding this association, Carleton has used contrails as a sort of metr
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POPS Engineer's work may reduce jet travel's role in global warming Backed by government and industry grants, Dryer is leading two new research efforts to advance these technologies. The first, a major project funded by the U.S. Air Force, is focused on developing computational and kinetic models that accurately simulate the burning of jet fuel, a complex and poorly characterized mix of chemicals.
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POPSSimultaneously, Russia and America Conduct Major War Games Russian strategic bombers Tu-160, Tu-95 and Tu-22M3, and Il-78 aerial tankers "will conduct flights over the Arctic region, the Atlantic and the Pacific oceans, and the Black Sea, with simulated bombing raids and firing of cruise missiles at testing grounds in northern and southern Russia," Colonel "Alexander Drobyshevsky said." (RIA Novosti). Part of these Russian war games will be conducted in the Arctic, within proximity of US and Canadian territory (Alaska and Canada's Arctic). "U.S. and Canadian fighter jets, including F-15s, were dispatched each time to escort the Russian planes in the exercises, which ranged from two to six aircraft,... "
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POPSContrails or Chemtrails? Looks just like my sky on the west coast. Contrails (Chemtrails?) are the only cloud I see here now - so we really need them. No cloud - no life. And how is your sky?
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POPS contrail.gi.alaska.edu Condensation trails (contrails) formed by aircrafts are sometimes visible from the ground for several hours. Numerous contrails are formed in the vicinity of main air- traffic routes; due to additional spreading effects contrails may contribute significantly to the total cloud cover. Continuous observational methods are used to study the formation of contrails in the subarctic setting of Fairbanks, Alaska. Since March of 2000 a contrail database has been established, which includes contrail characteristics, Federal Aviation Administration flight data, and atmospheric measurements derived from radiosonde ascents at Fairbanks International Airport. The contrail analysis is based on all-sky digital camera imagery and direct observations of aircrafts. Daily Overflights for Fairbanks, AK airspace. Note: Page was updated for the last time by Martin Stuefer, 13.Apr.2006. The flight data is no longer being updated. However, the flight archive is available. http://contrail.gi.al
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POPSManitoba tornado was strongest ever "The tornado prompted the Manitoba government to renew its call for a national severe weather warning system _ one that would send warnings to cellphones, pagers and other personal electronic devices. The federal and provincial governments have been discussing the issue, although it remains to be seen how much money each level of government would have to provide."
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POPSSeptember's Science: Shutdown of airlines aided contrail studies Week of May 11, 2002; Vol. 161, No. 19 , p. 291 "Immediately after four hijacked airliners slammed into New York's World Trade Center, the Pentagon, and a field in southwestern Pennsylvania, the Federal Aviation Administration shut down all U.S. commercial air traffic for 3 days. The unprecedented grounding of airliners enabled airports to step up security measures. At the same time, scientists stepped up to a unique opportunity to study the influence of high-flying aircraft on Earth's climate."
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POPSIN REMEMBRANCE… I too, remember. And that one lone contrail - that one lone cloud over America. Up here in Canada, spaghetti jetclouds. NoCloud: http://www.pediascribe.com/sun.jpg Cloud: http://www.pediascribe.com/umbrella.jpg
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POPSEarth could 'flip' into environmental disaster The study looked back over more than 400,000 years of climate records from deep ice cores and found evidence to suggest that rapid climate change over a period of centuries, or even decades, have in the past occurred once the world began to heat up and ice sheets started melting. "The unnatural "forcing" of the climate as a result of man-made emissions of carbon dioxide and other greenhouse gases threatens to generate a "flip" in the climate that could "spark a cataclysm" in the ice sheets of Antarctica and Greenland. Dramatic climatic flips have occurred in the past but none has happened since the development of complex human societies, which are unlikely to survive the same sort of environmental changes if they occurred now." It has already flipped, contrails, shiptrails, and other trails have , so far, saved the earth. jc
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