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2012-09-21  |  Paul Beckwith

By Paul Beckwith

About 5 million years ago continental drift pushed North and South America together, creating the Isthmus of Panama where the Central American Seaway ocean passage had previously existed. The Pacific and Atlantic were no longer connected, drastically altering global ocean currents and atmospheric circulation patterns. As the Atlantic Gulf Stream strengthened, it carried vast amounts of moisture into the northern regions. The Arctic eventually cooled and it’s estimated sea ice cover has existed continuously in the Arctic Ocean for 3 million years, possibly for as long as 13 million years.

Slow cycling between cold and warm periods occurred on Earth many times due to the planet's changing orbit, tilt, and position relative to the sun. This caused the sea ice to wax and wane in size but it always persisted, never vanishing. Not any longer. The sea ice will disappear for longer and longer periods over the coming years until it is finally...

2012-09-14  |  Webmaster

A MUST SEE! The cartoon below, a sad depiction of reality, says more than you could in 1000 words. Please share!

2012-09-13  |  Gordon Edwards

 

Gordon Edwards is President of the
Canadian Coalition for Nuclear Responsibility
.

 

Scene 1:
Picture, if you will, a small-town sheriff who sits dozing in his office for 18 years, ignoring alarms and wake-up calls, yet bragging that he will "never compromise public safety".

Scene 2:
Imagine that same sheriff posting a speed limit of 34 million kilometres per hour, then claiming that no one in town is ever guilty of speeding because no one can possibly exceed that limit....

2012-09-07  |  John Bennett

A great Sierra Club environmental victory went largely unnoticed a couple of weeks ago. President Obama announced new fuel economy standards (an increase up to 54 miles per gallon) by 2025. As is generally the case, Canada will undoubtedly follow suit soon.

Working on both sides of the border, Sierra Club campaigners played a critical role in forming and executing a North American “clean car” strategy. It was brilliant, really. I'm proud to have been part of it.

It was a simple encirclement of Detroit. The car companies controlled the US Congress and Ottawa, but did they control sate and provincial governments? They certainly didn’t control California – always in the forefront of clean car regulations.

California Senator...

2012-08-30  |  John Bennett

By John Bennett and Paul Beckwith

I'm sharing my space this week with climatologist Paul Beckwith because an enormous cyclone blew over the North Pole all this month - an event that has kept scientists around the world up at night.

It’s very rare for there to be such a storm in the summer. In the past a storm like this would arise in winter and blow snow around on top of a thick ice cover. This summer, over thinner ice, the wind creates large waves which, combined with warm temperatures of air and water, are causing havoc with a keystone of the global climate.

Arctic ice physically reflects most of the incoming solar radiation harmlessly back into space, keeping the surface temperatures cold. When water replaces the melting ice it absorbs much, much more sunlight and thus increasingly heats up the ocean and atmosphere. This extra heat melts even more ice in a vicious heat amplifying feedback cycle.

No computer models predicted...

 
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