global warming vs. global 'dimming'
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peace to all,
a few days ago, i watched a NOVA program on T.V. which mainly talks about this new phenomena called global 'dimming'. i saw scientists in Australlia defining "pan-evaporation rate",which is a proven hypothesis based on a decline in "sunlight power" over the last century. support the decline in smoke from the pan when you boil a cup of tea/water in 1999 that compared to 1950(an observation). this program furthered their research by statingthat global warming is what necessarily a rise in temperature and global dimming could result in a colder earth. they also showed that as a result of rising smoke from the factories of india and china creates layer in the atmosphere on earth(a barrier) which prevents most of the sunlight from reaching the earth(this info, according to the program contradicts global warming). but in contrary, the invisible gas which is ejacuated by cars contributes to global warming. the water vapor left behind by airplanes in our atmosphere, contributes to global dimming. in america, because of fear of flight after the 9/11 event, most airflights did not take flight(canceled). the scientist then saw a big rise in temperature. the scientist thus concluded this water vapor issue and concluded global warming is the reason why iceberg is melting. so, global dimming is not as bad as it seems(preventing a big flood in the near futurefrom occuring which might drown sea level states such as florida...)
i represented this issue to the best of my knowledge(as much as i may remember), please do not overlook any inaccuracy from this article.
peace, rifat
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peace all,
check out this link for verification
http//www.pbs.org/wgbh/nova/sun/
In the early 21st century, it's become clear that air pollution can significantly reduce the amount of sunlight reaching Earth, lower temperatures, and mask the warming effects of greenhouse gases. Climate researcher James Hansen estimates that "global dimming" is cooling our planet by more than a degree Celsius (1.8?F) and fears that as we cut back on pollution, global warming may escalate to a point of no return. Regrettably, in terms of possibly taking corrective action, our current understanding of global dimming has been a long time in the coming, considering the first hints of the phenomenon date back to 18th-century observations of volcanic eruptions. In this slide show, follow a series of historic events and scientific milestones that built the case for global dimming. Click on the image at left to begin.Susan K
quote taken fromhttp//www.pbs.org/wgbh/nova/sun/dimming.html