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Global temperatures are changing at a far faster pace than ever before Cheap Women's New Balance 574 Retro Pink Shoes , dramatically affecting the Arctic ice cap (AFP PhotoCory J. Mendenhall)

Aboard CCGS Amundsen (Canada) - The Arctic ice cap is melting faster than ever before, threatening to push so much fresh water into the North Atlantic that it could disrupt how the ocean regulates global temperatures, a prominent oceanographer has warned.


 


As the head of a 40-member climate mission to the Arctic aboard the Canadian Coast Guard ice breaker Amundsen, Belgian researcher Roger Francois is concerned about how the pace of climate change may affect the future of deep water pools and currents, and how this imbalance may worsen the effects of global warming.


 


Over the course of the past two million years Cheap Men's New Balance 574 Grey Green Shoes , temperatures have risen and fallen in 100,000-year cycles, with a sheet of ice forming over the Arctic cap each time followed by a rapid melt, he told AFP.


 


The last warming occurred between 20,000 and 15 Cheap Women's New Balance 574 Retro Grey Pink Shoes ,000 years ago, and led at that time to a rise in sea level of 130 meters (425 feet).


 


"This really is the trend with the thaws in Greenland and Antarctica," said Francois, who is a professor at the University of British Columbia in Vancouver.


 


"The biggest difference with today is the time scale. It has never been faster."


 


View galleryResearcher Roger Francois says human civilization is …


 


Researcher Roger Francois says human civilization is a direct result of earlier climate change (AFP …


 


Each cycle is marked by an increase in carbon in the atmosphere. At the last change, the rate of carbon dioxide in the air increased from 180 parts per million to 280 ppm over 5 Cheap Women's New Balance 574 Yellow Navy Shoes ,000 years. Until the Industrial Revolution, the level remained at 280 ppm, and since then it has skyrocketed to more than 400 ppm in 2015, he explained.


 


"If we continue this way, and that's what seems to be happening Cheap Men's New Balance 574 Blue Navy Shoes , we'll end up by the end of the century with rates we have not had since the days of the dinosaurs, the Mesozoic Age," with 1,000 ppm, Francois warned.


 


- 'Feedbacks' -


 


The last deglaciation Cheap Men's New Balance 574 Loyal Blue Grey Shoes , or disappearance of ice from an area that was formerly covered by it, was followed by a much longer than usual period of climate stability, which allowed Homo sapiens to flourish.


 


"Our civilization, as we know it, is actually a direct result of climate change Cheap Women's New Balance 574 Red White Shoes ," said Francois.


 


View galleryA polar bear on Griffith Island, in the Canadian High …


 


A polar bear on Griffith Island, in the Canadian High Arctic, September 2015 (AFP PhotoClement Sabo …


 


At the heart of this climate are "deep water" masses that are created in the North Atlantic off Greenland when surface seawater evaporates and cools as wind blows over it, resulting in increased salinity. The remaining water becomes heavier and more dense and sinks into deep basins.


 


The water then flows southward along deep abyssal plains and back Cheap Men's New Balance 574 Burgundy White Shoes , creating currents that are "a major mechanism for transporting heat from the equator to the poles," said Francois.


 


With the melting of the ice cap, dilution in the sea of ??icebergs made of fresh water "lowers salinity, and makes more difficult the formation of deep water masses," he explained.


 


But if the heat transfer between the equator and the poles is interrupted because this deep water circulation is broken Cheap Women's New Balance 574 Jade Green Shoes , then "high latitudes become much colder," he said.


 


Such a scenario already happened during the last global warming.


 


"It was still colder in early deglaciation than during the Ice Age in northern Europe in particular," said the oceans researcher.


 


Changing of the deep water formation is only one of several climate phenomena that can amplify the effects of global warming. These so-called "feedbacks" can cause climate change to spiral out of control.


 


An oft-cited example of this is the melting of sea ice due to warming exposing darker seas that absorb heat instead of reflecting sunshine, which hastens warming.


 


"We do not know all the feedbacks involved in the change, hence our concern Cheap Men's New Balance 574 Gradient Army Green Shoes ," says Francois.


 


"The whole system is so complex, it is not something that can be experimented on. We're talking about processes occurring on a global scale. Just a small detail forgotten can lead to different conclusions."


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RIO DE JANEIRO, Aug. 21 (Xinhua) -- Badminton powerhouse China stood on the top place at the badminton medal table with two golds and one bronze, while nine teams took home badminton medals from Rio. Japan was listed second with one gold and one silver. Spain and Indonesia took one gold each, and Malaysia wrapped up three silvers.


 


China experienced a tough fight and ended the Rio Olympic trip with two golds after Chen Long defeated Lee Chong Wei to claim the men's singles champion on Saturday.


 


China has won this Olympic event three times in a row, with Lin Dan having won the previous two gold medals. Lee Chong Wei claimed his third silver medal in a row in the men's singles.


 


The other gold for China came from men's doubles, in which Fu Haifeng and Zhang Nan survived two match points to beat Malaysian duo Goh V Shem and Tan Wee Kion in three sets.


 


Carolina Martin from Spain became the first non-Asian winner of the Olympic Games badminton women's singles competition after beating PV. Sindhu in a tense final. She also became the second athlete from a non-Asian National Olympic Committee to claim Olympic gold in badminton. It was also the first badminton Olympic gold medal for Spain.


 


In women's doubles, Misaki Matsutomo and Ayaka Takahashi from Japan launched an astonishing fightback to deny Danish pair Christinna Pedersen and Kamilla Rytter to win and win the country's first Olympic badminton gold medal. Losing women's doubles gold medal shocked China as it's the first time Chinese shuttlers missed the gold medal in 20 years and there were no Chinese shuttlers in the gold and silver fina. Authentic MLB Jerseys From China   Cheap NFL Jerseys Online   Custom NFL Jerseys Cheap   Custom Soccer Jerseys China   New NHL Jerseys Wholesale   Cheap Red Sox Jerseys   Cheap Cincinnati Reds Jerseys   Wholesale Orioles Jerseys   Wholesale Miami Marlins Jerseys   Wholesale Los Angeles Dodgers Jerseys 


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