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How floor repair of Inuvik's 'igloo church' could offer deeper look into North's permafrost

How floor repair of Inuvik's 'igloo church' could offer deeper look into North's permafrost
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Ancient sand reveals missing piece of 3.2-billion-year-old continent

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Ancient sand reveals missing piece of 3.2-billion-year-old continent
Scientists have found evidence for a missing piece of a 3.2-billion-year-old continent, according to a new study by University of Alberta scientists. The research identifies the only remnant of ultra-hot lavas within this ancient landmass, located within tiny mineral grains preserved in sandstone.
“Our research developed a method to identify and date pieces of our ancient continents that until now have been lost to us,” said Rasmus Haugaard, who conducted the research during his PhD studies in the Faculty of Science. “This is crucial as it can improve how we model the evolution of Earth’s early continents.” ....

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Arctic heat waves and thawing permafrost worsen climate threat

Arctic heat waves and thawing permafrost worsen climate threat
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Fighting the feedback loop: why scientists are sounding the alarm on Canada's melting permafrost

But with northern Canada warming about three times as fast as the rest of the world, climate change threatens the permanence of vast stretches of this frozen ground and the ecosystems and communities it supports.
For the people living in the subarctic Dehcho region of the Northwest Territories, the changes have been stark.
“Our Elders definitely noticed a real change in how things look,” Dehcho First Nations Grand Chief Gladys Norwegian told The Narwhal in an interview. “They don’t have to be scientists to know, they just feel it and see it.”
While the impacts are felt most acutely in the North, permafrost thaw has implications for the global climate as well. ....

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Scientists are sounding the alarm on Canada's melting permafrost

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In Canada s North, landscapes such as caribou habitat found in Yukon s Tombstone Territorial Park, seen here, are increasingly at risk of dramatic change as permafrost melts. Scientists are now researching what s known as the permafrost carbon feedback loop, in which melting permafrost releases greenhouse gases that further amplify climate change. Photo: Jimmy Thomson / The Narwhal
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Fighting the feedback loop: why scientists are sounding the alarm on Canada’s melting permafrost
Nearly half of Canada’s land mass lies above permafrost. As it thaws, greenhouse gases stored for centuries in the frozen ground are released and once-stable land is susceptible to collapse ....

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