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Half of Canada’s ice shelves have disappeared in the last 6 years
Ninelives Show this Post
09-30-2011, 02:46 AM #1
Ninelives Incognito Anonymous

September 29, 2011 – CANADA – Half of Canada’s ancient ice shelves have disappeared in the last six years, researchers have said, with new data showing significant portions melted in the last year alone. This ice lost during the Canadian summer this year equals up to three billion tonnes or about 500 times the mass of the Great Pyramid of Giza, a statement released by the university said. “Since the end of July, pieces equaling one and a half times the size of Manhattan Island have broken off,” said Luke Copland, researcher in the Department of Geography at the University of Ottawa. Oil rigs in the Beaufort and Chukchi seas may be at risk from large icebergs that broke off the shelf and are now floating south, he said. Assistant Professor Derek Mueller, a researcher in the Department of Geography and Environmental Studies, said that Canadian ice shelves had halved in size since 2005. “The ice shelves were formed and sustained in a different climate than what we have now. As they disappear; it implies we are returning to conditions unseen in the Arctic for thousands of years,” he said. Professor Steven Sherwood, Co-Director of the University of NSW’s Climate Change Research Centre, said the rapid pace of melting showed that recent global warming was unnatural. “The real significance of this, in my view, is that this ice has reportedly been there for thousands of years. The same is true of glaciers that have recently disappeared in the Andes. These observations should dispel in one fell swoop any notion that recent global warming could be natural,” he said. –Physics.org

09-30-2011, 04:42 AM #2
Tacolover II Member
Posts:377 Threads:59 Joined:Feb 2011
"team of MIT scientists recorded a nearly simultaneous world-wide increase in methane levels -the first increase in ten years. What baffles the team is that this data contradicts theories stating humans are the primary source of increase in greenhouse gas. It takes about one full year for gases generated in the highly industrial northern hemisphere to cycle through and reach the southern hemisphere. Since all worldwide levels rose simultaneously throughout the same year, however, it is probable that this may be part of a natural cycle - and not the direct result of man's contributions.

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MIT's Matthew Rigby and Ronald Prinn, the TEPCO Professor of Atmospheric Chemistry in MIT's Department of Earth, Atmospheric and Planetary Science, state that this imbalance has resulted in several million metric tons of additional methane in the atmosphere. Methane is produced by wetlands, rice paddies, cattle, and the gas and coal industries, and is destroyed by reaction with the hydroxyl free radical (OH), often referred to as the atmosphere's "cleanser."

Methane accounts for roughly one-fifth of greenhouse gases in the atmosphere, though its effect is 25x greater than that of carbon dioxide. Its impact on global warming comes from the reflection of the sun's light back to the Earth. Methane is broken down in the atmosphere by the free radical hydroxyl (OH), a naturally occuring process. This atmospheric cleanser has been shown to adjust itself up and down periodically, and is believed to account for the lack of increases in methane levels in Earth's atmosphere over the past ten years despite notable simultaneous increases by man.

Prinn has said, "The next step will be to study [these changes] using a very high-resolution atmospheric circulation model and additional measurements from other networks. The key thing is to better determine the relative roles of increased methane emission versus [an increase] in the rate of removal. Apparently we have a mix of the two, but we want to know how much of each [is responsible for the overall increase]."

The primary concern now is that while the collected data in 2007 reflects a simultaneous world-wide increase in emissions, how relevant are any of the data findings at this late date?

One thing does seem very clear, however; science is only beginning to get a focus on the big picture of global warming. Findings like these tell us it's too early to know for sure if man's impact is affecting things at "alarming rates." We may simply be going through another natural cycle of warmer and colder times - one that's been observed through a scientific analysis of the Earth to be naturally occurring for hundreds of thousands of years.

Posted by Casey Kazan. Photo Credit: Maria Stenzel, National Geographic.

Source Link: http://web.mit.edu/newsoffice/2008/methane-tt1029.html

MIT Team Asks: Is Global Warming Part of a Natural Cycle?."

09-30-2011, 04:57 AM #3
Tacolover II Member
Posts:377 Threads:59 Joined:Feb 2011
Further down in the article there is a section to post questions and answers. Here is something that reared it's ugly head in the BP Macondo blowout:

"Why don't they touch on the possibility that the rise in Methane simultaneously around the world could be methane clathrates melting and releasing methane into the atmosphere thru the worlds oceans? Then the argument could definitely be made that the rise in ocean temperature that is causing the melting is due to our impact on global warming, therefore being directly our fault?"

Another reason for the rise in Methane could be the refinning of hydrogen. Yes it's clean to burn but is very dirty to make. Electrolysis of water or salt water is 1-way but the cheapest way is methane. The simple CH4 molecule contains 4-hydrogens to waters 2 hydrogen's. Separating the hydrogens from the Carbons (CH4) is cheaper however leaves a great quantity of Carbon Dioxide (CO2) also a greenhouse gas.

If all the tree huggers had their way we would be utilizing Hydrogen as it is so clean to burn. Then whine about the CO2 later when they figure it out.

Water works however it takes more electricity to produce. A lot more and wonder where how that is made???
09-30-2011, 03:32 PM #4
yankees skier
Posts:5,032 Threads:215 Joined:Feb 2011
Well, Greenland didn't get it's name because it was covered in ice.




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