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Latest Carbon cycle Stories

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2010-08-03 08:42:40

Meteorologists have determined exactly how much carbon dioxide humans can emit into the atmosphere while ensuring that the earth does not heat up by more than two degrees The Intergovernmental Panel on Climate Change (IPCC) calculated projected temperature changes for various scenarios in 2007 and researchers at the Max Planck Institute for Meteorology in Hamburg have now gone one step further: they have developed a new model that specifies the maximum volumes of carbon dioxide that humans...

2010-07-26 12:13:10

The terrestrial biosphere regulates atmospheric composition, and hence climate. Projections of future climate changes already account for "carbon-climate feedbacks", which means that more CO2 is released from soils in a warming climate than is taken up by plants due to photosynthesis. Climate changes will also lead to increases in the emission of CO2 and methane from wetlands, nitrous oxides from soils, volatile organic compounds from forests, and trace gases and soot from fires. All these...

2010-07-22 15:38:01

Much organically bound carbon is deposited on inland lake bottoms. A portion remains in the sediment, sometimes for thousands of years, while the rest is largely broken down to carbon dioxide and methane, which are released into the atmosphere. Swedish researchers have shown that carbon retention by sediment is highly temperature-sensitive and that a warmer climate would result in increased carbon dioxide emissions to the atmosphere. The study is published in the current issue of the journal...

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2010-07-21 09:30:00

Using NASA satellite data, scientists have produced a first-of-its kind map that details the height of the world's forests. Although there are other local- and regional-scale forest canopy maps, the new map is the first that spans the entire globe based on one uniform method. The work -- based on data collected by NASA's ICESat, Terra, and Aqua satellites -- should help scientists build an inventory of how much carbon the world's forests store and how fast that carbon cycles through...

2010-07-20 14:00:00

WASHINGTON, July 20 /PRNewswire-USNewswire/ -- Scientists have produced a first-of-its kind map of the height of the world's forests by combining data from three NASA satellites. The map will help scientists build an inventory of how much carbon the world's forests store and how fast that carbon cycles through ecosystems and back into the atmosphere. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) Maps of local...

2010-07-06 13:48:47

A new study, involving academics at the University of Sheffield, has accurately measured for the first time the current carbon cycles in the world. The research will enable scientists to make more accurate predictions concerning the impact of climate change in the future. The paper, which will be published today (5 July 2010) in the journal Science, used large amounts of remote sensing, climate and carbon data from around the world to assess Gross Primary Production. This is the process which...

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2010-07-06 07:34:28

New data on photosynthesis and respiration will improve models, researchers say Two recent international studies are poised to change the way scientists view the crucial relationship between Earth's climate and the carbon cycle. These reports explore the global photosynthesis and respiration rates"”the planet's deep "breaths" of carbon dioxide, in and out"”and researchers say that the new findings will be used to update and improve upon traditional models that couple together...

2010-07-02 20:21:36

With carbon dioxide in the atmosphere approaching alarming levels, even halting emissions altogether may not be enough to avert catastrophic climate change. Could scrubbing carbon dioxide from the air be a viable solution? A new study by scientists at the Carnegie Institution suggests that while removing excess carbon dioxide would cool the planet, complexities of the carbon cycle would limit the effectiveness of a one-time effort. To keep carbon dioxide at low levels would require a...

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2010-06-28 13:17:49

A NASA-led research team has expanded the growing global armada of remote sensing satellites capable of studying carbon dioxide, the leading greenhouse gas driving changes in Earth's climate. The newest addition is the Tropospheric Emission Spectrometer (TES) instrument on NASA's Aura spacecraft, launched in 2004. TES measures the state and composition of Earth's troposphere, the lowest layer of Earth's atmosphere, located between Earth's surface and about 16 kilometers (10 miles) in...

2010-06-18 13:34:13

Numerous studies are documenting the growing effects of climate change, carbon dioxide, pollution and other human-related phenomena on the world's oceans. But most of those have studied single, isolated sources of pollution and other influences. Now, a marine geochemist at the Woods Hole Oceanographic Institution (WHOI) has published a report in the latest issue of the journal Science that evaluates the total impact of such factors on the ocean and considers what the future might hold. "What...


Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'