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coming back from a 6-week break wasn't fun, it was back to reality!! aboard this 12-hour Philippine Airline's dark-of-night non-stop flight from Manila to LA, i again as usual chose a window seat. the flight was smooth, service-friendly, good food and pluffy pillows all the way. it was a full-packed flight! two hours before arrival, after breakfast was served, i put up the window shield to find this sunset welcoming us- what a sight!

on the other hand, i didn't know that night flights are worse for global warming! read this please- excerpt from one Agence France Presse article i came accross-

...at certain altitudes, aircraft produce contrails - condensation trails caused when the plane's hot exhaust hits the chilly athmosphere. these contrails have a surprisingly big but also complex effect on the climate. because they are clouds, they trap heat that is emitted by the earth's surface, creating a "greenhouse" effect that aids to warming. yet during daytime, these clouds have a cooling effect because they are white and thus reflect some of the sun's energy back into space. in certain conditions, contrails can exist for several hours.

night flights contribute between 60-80% of the greenhouse effect from contrails, scientists found. the flights between December and February contribute half of the annual mean climate warming. although there are fewer flights during the winter months, the conditions needed to form contrails - the right temperature, amount of moisture in the air and aircraft altitude - are found more often then....

restrictions on night flights could ease the aviation industry's fast-growing contribution to global warming, say UK scientists. rescheduling night flights for the daytime, planes could diminish their contribution to global warming by changing their altitudes. a study published in the Journal Research suggests that the regions of "ice-supersaturated" air where contrails form is only about 500 meters thick. the goal would be to fit sensors on aircraft that could inform pilots where these layer lies, thus enabling them to shift altitude accordingly...

www.abc.net.au/science/news/stories/2006/1663637.htm.

belido, kiwi_explorer, riclopes, saylan-cb, stego, paololg trouve(nt) cette note utile

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