Plan to reverse global warming could backfire
But such cooling would come with unintended side effects. She said sulfate injections could react with chlorine gasses in cold polar regions, triggering a chemical reaction that would further deplete atmospheric ozone.
Tilmes and colleagues looked specifically at the impact of plans to repair holes in the ozone over the poles and concluded that regular injections of sulfates over the next few decades would destroy between one-fourth to three-fourths of the ozone layer above the Arctic.
That would affect a large part of the Northern Hemisphere because of atmospheric circulation patterns, they said. The impact would be less during the second half of the century because of international pacts to ban the production of ozone-depleting chemicals.
In the Antarctic, a sulfate-injection scheme would delay the recovery of the ozone hole by 30 to 70 years, or at least until the last decade of this century.
Tilmes and colleagues used different measurements and computer models to make their predictions.
She said her findings did not close the door on the idea of artificially cooling the planet in that way but raised a flag of caution.
“We need people to have atmospheric models to understand the process in more detail,” she said in a telephone interview.
http://www.reuters.com/article/environmentNews/idUSN2435161220080424?pageNumber=2&virt
We Are Change UK – Phil Hayton and WTC7
Members of We Are Change UK interview ex BBC World presenter, Phil Hayton.
World might be heading towards Ice Age
CANBERRA: Scientists have warned that the world might once again be heading towards an Ice Age, with global warming approaching a possible end.
Evidence in support of this theory has come from pictures obtained from the US Solar and Heliospheric Observatory, which showed no spots on the sun, thus determining that sunspot activity has not resumed after hitting an 11-year low in March last year.
A sunspot is a region on the sun that is cooler than the rest and appears dark.
Some scientists believe a strong solar magnetic field, when there is plenty of sunspot activity, protects the earth from cosmic rays, cutting cloud formation, but that when the field is weak – during low sunspot activity – the rays can penetrate into the lower atmosphere and cloud cover increases, cooling the surface.
According to Australian astronaut and geophysicist Phil Chapman, this might have caused the world to cool quickly between January last year and January this year, by about 0.7C.
“This is the fastest temperature change in the instrumental record, and it puts us back to where we were in 1930,” said Dr Chapman.
“If the temperature does not soon recover, we will have to conclude that global warming is over,” he added.
Dr Chapman has proposed preventive, or delaying, moves to slow the cooling, such as bulldozing Siberian and Canadian snow to make it dirty and less reflective.
“My guess is that the odds are now at least 50:50 that we will see significant cooling rather than warming in coming decades,” he said
http://economictimes.indiatimes.com/Earth/Are_we_heading_to_ice_age/articleshow/2975016.cms
Secret Nuke Talks On The Hill
April.23, 2008
How the Pentagon Spread Its Message
David Barstow, an investigative reporter for The Times, examines primary source documents detailing the Pentagon’s response to criticism of then-Secretary of Defense Donald H. Rumsfeld by a group of prominent retired generals
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