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Jan
26
2010
Closing ozone hole may heat up southern hemisphere
Order viagra free samples online cheap, As the ozone layer over the Antarctic recovers, the Earth may lose a cooling effect that has been counteracting global warming, scientists say.
Researchers have suggested that the ozone hole is partly responsible for faster winds in the southern hemisphere. In a study in press at Geophysical Research Letters, order viagra free samples online, Cheap viagra free samples without prescription, a team notes that wind speeds in the area have increased by about 0.45 meters per second every 10 years between 1980-2002.
Computer modelling showed that the change in winds likely caused more sea spray, which in turn altered the composition of clouds, ordering viagra free samples from canada. Connecticut CT Conn. , At an altitude of 1 kilometer, for instance, viagra free samples online cheap, Rhode Island RI R.I. , the concentration of cloud drops went up by an average of 11% and sometimes by as much as 46%. The clouds then reflected more light and helped cool the region.
But a repaired ozone layer could diminish wind speeds again, cheapest viagra free samples online, Cheap viagra free samples pills, the researchers say. That would make clouds less reflective and weaken one of the checks on global warming, αγοράσετε viagra free samples έκπτωση. North Carolina NC N.C. , – Roberta Kwok
Source: Korhonen, H, Iowa IA . Bestill viagra free samples online, et al. (2010), comprar viagra free samples de descuento. North Dakota ND , Aerosol climate feedback due to decadal increases in southern hemisphere wind speeds Geophysical Research Letters DOI: 10.1029/2009GL041320
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