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Latest Atmospheric methane Stories

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2010-06-18 09:40:33

Findings released during the annual Goldschmidt Conference at the University of Tennessee, Knoxville By examining 800,000-year-old polar ice, scientists increasingly are learning how the climate has changed since the last ice melt and that carbon dioxide has become more abundant in the Earth's atmosphere. For two decades, French scientist J©rôme Chappellaz has been examining ice cores collected from deep inside the polar ice caps of Greenland and Antarctica. His...

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2010-05-24 06:16:30

The extinction of mammoths and other megafauna that came after humans spread out across the New World may be one explanation of a sharp decline in global temperatures more than 12,750 years ago, researchers reported on Sunday. Roughly a hundred species of grass-eating giants that once flourished on the North American landscape released massive quantities of methane during their lifetime. As a heat-trapping greenhouse gas, methane is 30 times more potent than carbon dioxide. It may not have...

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2010-03-05 09:30:00

Thawing by climate change of subsea layer of permafrost may release stores of underlying, seabed methane A section of the Arctic Ocean seafloor that holds vast stores of frozen methane is showing signs of instability and widespread venting of the powerful greenhouse gas, according to the findings of an international research team led by University of Alaska Fairbanks scientists Natalia Shakhova and Igor Semiletov. The research results, published in the March 5 edition of the journal Science,...

2010-01-14 18:15:00

The surprising increase in methane concentrations millennia ago, identified in continental glacier studies, has puzzled researchers for a long time. According to a strong theory, this would have resulted from the commencement of rice cultivation in East Asia. However, a study conducted at the University of Helsinki's Department of Environmental Sciences and the Department of Geosciences and Geography shows that the massive expanse of the northern peatlands occurred around 5000 years ago,...

2009-08-18 14:22:32

Canadian scientists say stressed crops emit more methane than thought and could result in a bigger global warming problem than currently forecast. University of Calgary scientists said when crops are exposed to environmental factors that are part of climate change -- increased temperature, drought and ultraviolet-B radiation -- some plants show enhanced methane emissions. And methane is a significant greenhouse gas; 23 times more effective in trapping heat than carbon dioxide. Most studies...

2009-08-17 15:45:40

Scientists at the University of Calgary have found that methane emission by plants could be a bigger problem in global warming than previously thought.A U of C study says that when crops are exposed to environmental factors that are part of climate change -- increased temperature, drought and ultraviolet-B radiation -- some plants show enhanced methane emissions. Methane is a very potent greenhouse gas; 23 times more effective in trapping heat than carbon dioxide."Most studies just look at...

2009-05-19 09:00:00

FARMINGDALE, N.Y., May 19 /PRNewswire-FirstCall/ -- Cemtrex, Inc. (OTC: CTEI) announced that it is expanding its marketing activities in Ventilation Air Methane (VAM) for generation of carbon credits. When coal is formed in the mines, so is methane. When the coal is excavated, methane is released and since methane in concentrations of 5-15% is explosive, it is diluted to levels 0.2-1.0% with ventilation air as a safety measure. This very large volume of ventilation air with extremely low...

2009-05-08 12:24:17

Earth's earliest ice age could have been caused by an atmospheric rise in oxygen reacting with methane, a greenhouse gas, a geologist in Maryland said. This singular event had a profound effect on the climate, and also on life, said Alan J. Kaufman, a geology professor at the University of Maryland. Kaufman and a team of international scientists found evidence the oxygenation of Earth's atmosphere coincided with the first widespread ice age on the planet 2 1/2 billion years ago. They theorize...

2009-04-24 09:56:25

An analysis of ancient Greenland ice suggests a spike in the greenhouse gas methane about 11,600 years ago originated from wetlands rather than the ocean floor or from permafrost, a finding that is good news according to the University of Colorado at Boulder scientist who led the study.Methane bound up in ocean sediments and permafrost, called methane clathrate, has been a concern to scientists because of its huge volume, greenhouse gas potency and potential for release during periods of...

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2009-04-24 06:15:00

According to scientists, Greenland's icesheet has revealed a store of methane that appears to be more stable that previously thought, easing tensions over a rapid rise in global temperatures. Vast amounts of methane, a gas that is 25 times more powerful than carbon dioxide (CO2) at trapping heat within the atmosphere, is trapped within the permafrost in the far northern hemisphere, and in seabed deposits called clathrates. Scientists have feared that the release of the clathrate reservoir...


Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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