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Latest Weathering Stories

2011-05-02 23:36:34

In one of his songs Bob Dylan asks "How many years can a mountain exist before it is washed to the sea?", and thus poses an intriguing geological question for which an accurate answer is not easily provided. Mountain ranges are in a constant interplay between climatically controlled weathering processes on the one hand and the tectonic forces that cause folding and thrusting and thus thickening of the Earth's crust on the other hand. While erosion eventually erases any geological obstacles,...

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2011-01-20 10:13:45

By Anne M Stark, LLNL Using seawater and calcium to remove carbon dioxide (CO2) in a natural gas power plant's flue stream, and then pumping the resulting calcium bicarbonate in the sea, could be beneficial to the oceans' marine life. Greg Rau, a senior scientist with the Institute of Marine Sciences at UC Santa Cruz and who also works in the Carbon Management Program at Lawrence Livermore National Laboratory, conducted a series of lab-scale experiments to find out if a seawater/mineral...

2010-07-30 13:34:53

Some trees growing in nutrient-poor forest soil may get what they need by cultivating specific root microbes to create compounds they require. These microbes are exceptionally efficient at turning inorganic minerals into nutrients that the trees can use. Researchers from France report their findings in the July 2010 issue of the journal Applied and Environmental Microbiology. "In acidic forest soils, availability of inorganic nutrients is a tree-growth-limiting factor. A hypothesis to explain...

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2010-02-24 08:41:00

Sediments Frozen in Time Provide Clues Focusing on a controversial hypothesis that ice existed at the equator some 300 million years ago during the late Paleozoic Period, two University of Oklahoma researchers originated a project in search of clues to the Earth's climate system. "The Paleozoic Period was a rare time in history," says Gerilyn Soreghan, OU professor of geology. "Broadly speaking, it was the last time our planet experienced the type of climate system we have today and in the...

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2009-07-01 17:40:00

Over the past 24 million years, plants on the Earth have helped reduce the amount of CO2 in the atmosphere and saved the planet from becoming completely frozen, according to a report on Wednesday. Writing in the journal Nature, researchers at Yale University, the Carnegie Institution of Washington and the University of Sheffield used simulations to show that vegetation actually stabilized the Earth's climate and kept it from becoming locked within an icy shell. "Ultimately, we owe another...

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2009-01-26 13:46:48

More frequent freeze-thaw cycles intensify soil processes More frequent freeze-thaw cycles in winter can increase biomass production according to the results of a recent study conducted by the Helmholtz Center for Environmental Research (UFZ), the University of Bayreuth and the Helmholtz Center in Munich. For their experiment at the Ecological-Botanical Garden of the University of Bayreuth the researchers installed underground heating on their plots, thereby enabling five additional thawing...

2008-09-06 03:00:19

By Anonymous A single typhoon in Taiwan buries as much carbon in the ocean in the form of sediment as all the other rains in that country all year long combined, impeding the carbon cycle, a study by Ohio State University (OSU) said. The study was the first to examine the chemistry of stream water and sediments that were being washed out to sea during a typhoon. Anne Carey, associate professor of earth sciences at OSU, and her team studied physical weathering, when organic matter...

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2008-07-24 14:10:00

A single typhoon in Taiwan buries as much carbon in the ocean -- in the form of sediment -- as all the other rains in that country all year long combined. That's the finding of an Ohio State University study published in a recent issue of the journal Geology. The study -- the first ever to examine the chemistry of stream water and sediments that were being washed out to sea while a typhoon was happening at full force -- will help scientists develop better models of global climate change. Anne...

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2008-06-14 08:45:48

MADISON - A new analysis of ancient minerals called zircons suggests that a harsh climate may have scoured and possibly even destroyed the surface of the Earth's earliest continents. Zircons, the oldest known materials on Earth, offer a window in time back as far as 4.4 billion years ago, when the planet was a mere 150 million years old. Because these crystals are exceptionally resistant to chemical changes, they have become the gold standard for determining the age of ancient rocks, says...


Latest Weathering Reference Libraries

Acid Rain
2013-04-01 10:21:17

Acid rain is any form of precipitation that is unusually acidic, meaning that is possesses high levels of hydrogen ions. It can have harmful effects on aquatic animals, plants, and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules within the atmosphere to produce acids. Nitrogen oxides can be produced naturally by lightening strikes. Sulfur dioxide can be produced naturally by volcanic eruptions. The chemicals that are...

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Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.