Search results for arctic


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Prehistoric migrations: DNA study unravels the settlement history of the New World Arctic

Posted by External 4 days ago General
http://feeds.sciencedaily.com — A new DNA study unravels the settlement history of the New World Arctic. We know people have lived in the New World Arctic for about 5,000 years. Archaeological evidence clearly shows that a variety of cultures survived the harsh climate in Alaska, Canada and Greenland for thousands of years. Despite this, there are several unanswered questions about these people. Read More
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7 Votes Vote

In Photos: Life in the Arctic region of the Americas

Posted by External 5 days ago General
http://feedproxy.google.com — Life the frigid Arctic is challenging, but humans have populated the region for thousands of years. Now, a new study suggests the first groups of people to live in the Arctic region of the Americas do not have any descendents living today. Read More
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NASA scientists watching, studying Arctic changes this summer

Posted by External 7 days ago General
http://feeds.sciencedaily.com — As we near the final month of summer in the Northern Hemisphere, NASA scientists are watching the annual seasonal melting of the Arctic sea ice cover. The floating, frozen cap that stretches across the Arctic Ocean shrinks throughout summer until beginning to regrow, typically around mid-September. Read More
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12 Votes Vote

NASA Quickly Preps Aircraft For Arctic Warming Research | Video

Posted by External 9 days ago General
http://feedproxy.google.com — NASA's Arctic Radiation IceBridge Sea and Ice Experiment (ARISE) was given less than 7 months to plan and equip a C-130 aircraft for flight in August 2014. This process usually takes over a year. Read More
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What's Melting Arctic Ice? NASA Investigates Clouds

Posted by External 11 days ago General
http://feedproxy.google.com — Arctic sea ice is melting fast, having lost about 1 million square miles since the 1970s, but experts are still figuring out what factors, such as cloud cover, are speeding or slowing the ice's demise. Read More
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Study shows sunlight, not microbes dominate CO2 production in Arctic

Posted by External 12 days ago General
http://www.enn.com — Just how much Arctic permafrost will thaw in the future and how fast heat-trapping carbon dioxide will be released from those warming soils is a topic of lively debate among climate scientists. To answer those questions, scientists need to understand the mechanisms that control the conversion of organic soil carbon into carbon dioxide gas. Until now, researchers believed that bacteria were largel Read More
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Arctic sea ice influenced force of Gulf Stream

Posted by External 12 days ago General
http://feeds.sciencedaily.com — The force of the Gulf Stream was significantly influenced by the sea ice situation in the Fram Strait in the past 30,000 years. On the basis of biomarkers in deposits on the seafloor, geologists managed for the first time to reconstruct when and how the marine region between Greenland and Svalbard was covered with ice in the past and in what way the Gulf Stream reacted when the sea ice cover sudd Read More
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Sunlight, not microbes, key to carbon dioxide in Arctic

Posted by External 12 days ago General
http://feeds.sciencedaily.com — The vast reservoir of carbon stored in Arctic permafrost is gradually being converted to carbon dioxide after entering the freshwater system in a process thought to be controlled largely by microbial activity. However, researchers say that sunlight and not bacteria is the key to triggering the production of CO2 from material released by Arctic soils. Read More
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