Latest Carbon dioxide in the Earth's atmosphere Stories

2010-08-26 12:38:40

Relevance for geo-engineers: What fizzed once, can fizz again Imagine loosening the screw-top of a soda bottle and hearing the carbon dioxide begin to escape. Then imagine taking the cap off quickly, and seeing the beverage foam and fizz out of the bottle. Then, imagine the pressure equalizing and the beverage being ready to drink. Rutgers marine scientist Elisabeth Sikes and her colleagues say that something very similar happened on a grand scale over a 1,000 year period after the end of the...

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...

2010-06-28 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...

2010-06-28 06:35:00

A chain of past natural events may hold lessons for the future Scientists still puzzle over how Earth emerged from its last ice age, an event that ushered in a warmer climate and the birth of human civilization. In the geological blink of an eye, ice sheets in the northern hemisphere began to collapse and warming spread quickly to the south. Most scientists say that the trigger, at least initially, was an orbital shift that caused more sunlight to fall across Earth's northern half. But how...

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...

2010-06-18 07:52:08

CO2 levels explain why temperatures in tropical and arctic waters have risen and fallen together for the past 2.7 million years Increasingly, the Earth's climate appears to be more connected than anyone would have imagined. El Niño, the weather pattern that originates in a patch of the equatorial Pacific, can spawn heat waves and droughts as far away as Africa. Now, a research team led by Brown University has established that the climate in the tropics over at least the...

2010-05-27 17:37:00

Scientists have found the possible source of a huge carbon dioxide 'burp' that happened some 18,000 years ago and which helped to end the last ice age. The results provide the first concrete evidence that carbon dioxide (CO2) was more efficiently locked away in the deep ocean during the last ice age, turning the deep sea into a more 'stagnant' carbon repository "“ something scientists have long suspected but lacked data to support. Working on a marine sediment core recovered from the...

2010-05-07 09:45:00

Potential climate change caused by rising levels of carbon dioxide might be better understood by examining fossil plant remains from millions of years ago, according to biogeochemists. The types of carbon within the leaves can serve as a window into past temperatures and environmental conditions. "Carbon isotopes are really important for understanding the carbon cycle of the past, and we care about the carbon cycle of the past because it gives us clues about future climate change," said Aaron...

2010-04-27 18:52:47

New Haven, Conn. -- The physiology of microbes living underground could determine the amount of carbon dioxide emitted from soils on a warmer Earth, according to a study published online this week in Nature Geoscience. Researchers at UC Irvine, Colorado State University and the Yale School of Forestry & Environmental Studies have found that as global temperatures increase, microbes in soil become less efficient over time in converting carbon in soil into carbon dioxide, which is a key...

2010-02-16 16:39:50

Two studies provide clearer picture of how carbon cycle was dramatically affected long ago Geoengineering -- deliberate manipulation of the Earth's climate to slow or reverse global warming -- has gained a foothold in the climate change discussion. But before effective action can be taken, the Earth's natural biogeochemical cycles must be better understood. Two Northwestern University studies, both published online recently by Nature Geoscience, contribute new -- and related -- clues as to...

Word of the Day
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'