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Latest Carbon dioxide in the Earth's atmosphere Stories

2009-06-16 12:26:44

Emergency plans to counteract global warming by artificially shading the Earth from incoming sunlight might lower the planet's temperature a few degrees, but such "geoengineering" solutions would do little to stop the acidification of the world oceans that threatens coral reefs and other marine life, report the authors of a new study in the journal Geophysical Research Letters*. The culprit is atmospheric carbon dioxide, which even in a cooler globe will continue to be absorbed by seawater,...

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2009-05-29 09:16:25

Including land-based carbon in greenhouse gas control strategies lowers costs and preserves forests Cutting down forests for agriculture vents excess carbon dioxide into the air just as industrial activities and the burning of fossil fuels do. But whether policies to stabilize greenhouse gases in the atmosphere should include this terrestrial source of carbon dioxide is under debate. According to a new study this week in Science, failing to include land use changes in such policies could lead...

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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2009-02-17 09:09:33

In the Southern Indian Ocean, climate change is leading to stronger winds, which mix waters, bringing CO2 up from the ocean depths to the surface. This is the conclusion of researchers who have studied the latest field measurements carried out by CNRS's INSU, IPEV and IPSL. As a result, the Southern Ocean can no longer absorb as much atmospheric CO2 as before. Its role as a 'carbon sink' has been weakened, and it may now be ten times less efficient than previously estimated. The same trend...

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2009-01-14 09:25:46

Every time we get into our car, turn the key and drive somewhere, we burn gasoline, a fossil fuel derived from crude oil. The burning of the organic materials in fossil fuels produces energy and releases carbon dioxide and other compounds into Earth's atmosphere. Greenhouse gases such as carbon dioxide trap heat in our atmosphere, warming it and disturbing Earth's climate. Scientists agree that human activities have been the primary source for the observed rise in atmospheric carbon dioxide...

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2009-01-08 16:05:00

Mercury pollution has already spurred public health officials to advise eating less fish, but it could become a more pressing concern in a warmer world.So suggests a paper that appears in a recent issue of the journal Oecologia.Sue Natali, a postdoctoral associate in botany at the University of Florida and the paper's lead author, compared mercury levels in soils under trees growing in air enriched with carbon dioxide to soil beneath trees in ambient air. Carbon dioxide, the main greenhouse...

2008-12-19 10:59:56

The power of viruses is well documented in human history. Swarms of little viral Davids have repeatedly laid low the great Goliaths of human civilization, most famously in the devastating pandemics that swept the New World during European conquest and settlement.In recent years, there has been growing evidence for the hypothesis that the effect of the pandemics in the Americas wasn't confined to killing indigenous peoples. Global climate appears to have been altered as well.Stanford...

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2008-10-21 11:06:39

Ancient water findings can be used to predict future changes during greenhouse conditions Even though the Cretaceous Period ended more than 65 million years ago, clues remain about how the ocean water circulated at that time. Measuring a chemical tracer in samples of ancient fish scales, bones and teeth, University of Missouri and University of Florida researchers have studied circulation in the Late Cretaceous North Atlantic Ocean. The Late Cretaceous was a time with high atmospheric levels...

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2008-10-20 13:40:00

Tropical cyclones could offer some help in the fight against global warming by washing large amounts of vegetation and soil containing greenhouse gases into the sea, scientists said on Sunday."Tropical cyclones could have a significant role in the transfer of atmospheric carbon dioxide to long-term deposits in the deep ocean," according to the findings in the journal Nature Geoscience.Conducted on the LiWu river in Taiwan, the study suggested that floods caused by typhoon Mindulle in 2004...

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2008-10-07 07:55:00

Ice core and ocean deposit comparisons show complex links between carbon dioxide levels, ocean currents and climate; may help explain past, present and future climate trends In recent years, public discussion of climate change has included concerns that increased levels of carbon dioxide will contribute to global warming, which in turn may change the circulation in the earth's oceans, with potentially disastrous consequences. In a paper published last week in the journal Science, researchers...


Word of the Day
monteith
  • A large punch-bowl of the eighteenth century, usually of silver and with a movable rim, and decorated with flutings and a scalloped edge. It was also used for cooling and carrying wine-glasses.
  • A kind of cotton handkerchief having white spots on a colored ground, the spots being produced by a chemical which discharges the color.
This word is possibly named after Monteith (Monteigh), 'an eccentric 17th-century Scotsman who wore a cloak scalloped at the hem.'
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