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Latest Permafrost Stories

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2009-07-23 10:50:00

By comparing clear mountain lakes with brown forest lakes the scientists have been able to show that what controls production in lakes is light. This runs counter to conventional truths in lake research that says that productivity is determined by access to nutrients, such as phosphorous.  "In the brownest lakes sunlight can't penetrate more than about two meters. In clear mountain lakes, the light can reach down to depths of 15-20 meters and lead to high production of algae on lake...

2009-07-09 15:44:17

An Australian-led team of scientists says it has determined the amount of frozen carbon in Earth's northern regions is more than double previous estimates. We now estimate the deposits contain over 1.5 trillion tons of frozen carbon, about twice as much carbon as contained in the atmosphere, said Charles Tarnocai of Agriculture and Agri-Food Canada, the study's lead author. Pep Canadell, executive director of Australia's Global Carbon Project and study co-author, said the existence of...

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2009-07-09 13:19:41

Scientists have determined that the oldest viable seeds in the world, dating from the Pleistocene era, are not as old as experts once believed, BBC News reported. The seeds, which have been grown into live Arctic lupine plants, are not 10,000 years old as believed, according to new dating techniques. In fact, using the new methods, scientists have concluded they are actually modern seeds that contaminated ancient rodent burrows. However, the scientist who debunked the record said it remains...

2009-06-30 14:16:45

The vast amount of carbon stored in the arctic and boreal regions of the world is more than double that previously estimated, according to a study published this week.The amount of carbon in frozen soils, sediments and river deltas (permafrost) raises new concerns over the role of the northern regions as future sources of greenhouse gases."We now estimate the deposits contain over 1.5 trillion tons of frozen carbon, about twice as much carbon as contained in the atmosphere", said Dr. Charles...

2009-06-17 09:50:00

Two University of the Alaska Fairbanks researchers are among key contributors to a new national report that details visible effects of climate change in the United States and how today's choices stand to affect the future.The report, "Global Climate Change Impacts in the United States," is the first to focus on observed and projected climate change and its effects specifically in the United States. UAF scientists A. David McGuire and John Walsh were part of a consortium of experts from 13...

2009-06-02 11:20:01

As frozen arctic soil thaws due to climate change, U.S. scientists say bacteria will break down large amounts of carbon, sending it into the atmosphere. Although plants will initially proliferate, nurtured by balmier conditions and an increasing abundance of the greenhouse gas they depend on for growth, University of Florida researchers said they don't expect plant growth will be able to blunt the carbon release. At first, with the plants offsetting the carbon dioxide, it will appear...

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2009-05-29 09:30:00

Retrieve longest Arctic sediment record under Siberia's Lake El'gygytgyn A team of scientists from the United States, Germany, Russia and Austria has just returned from a six-month drilling expedition to a frozen lake in Siberia: Lake El'gygytgyn, "Lake E" for short. Lake E was created 3.6 million years ago when a meteor more than a half-mile wide hit Earth and formed an 11-mile wide crater. There, the researchers collected the longest sediment core samples retrieved in the Arctic region....

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2009-05-27 15:45:00

"A slow-motion time bomb." That's what one ecologist calls the looming threat of trapped greenhouse gases in the melting Arctic. Ted Schuur, an ecologist from the University of Florida, says the impact of thawing Arctic soil would allow bacteria to slowly break down organic matter and release carbon into the atmosphere, further exacerbating global warming. However, plants will also began to grow more as a result of thawing, which causes researchers to question how much these shrubs will be...

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2009-05-06 14:30:04

Global warming could result in massive droughts and flooding in Tibet, posing threats to the wellbeing of millions of people, according to the head of the China Meteorological Bureau. According to China's Xinhua news agency, Zheng Guoguang reported on Wednesday that climate change has "accelerated glacial shrinkage, and the melting glaciers have swollen Tibet's lakes." "If the warming continues, millions of people in western China will face floods in the short term and drought in the long...

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2009-04-15 14:24:50

U.S. government scientists say their research indicates the effects of significant global warming on Earth can no longer be avoided. But the researchers said a worldwide reduction in greenhouse gas emissions would reduce the effects, lessening sea-level rise and possibly saving Arctic Sea ice. The study, led by scientists at the National Center for Atmospheric Research, determined that if all nations cut emissions of heat-trapping greenhouse gases by 70 percent this century, the most...


Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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