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Tag: "atmosphere" at biology news

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...ody vegetation is further warming the near-surface atmosphere by absorbing rather than reflecting incoming solar...ant because conditions in the Arctic affect global atmosphere conditions. The Arctic is dominated by snow and ice, and if this condition were to change, even subt...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...ve, work, play and breathe! It's the region of the atmosphere where our weather occurs and it extends from the Earth's surface to roughly the cruising altitude of a passenger jet - about 40,000 feet. In some cases air pollutants have natural causes such as lightning induced wildfires that can emit large plumes ...

New tooth enamel dating technique could help identify disaster victims

...tions with air and is present at low levels in the atmosphere and food. Atmospheric testing of nuclear weapons f...ew locations, the elevated carbon-14 levels in the atmosphere rapidly equalized around the globe," he said. Since atmospheric testing was banned in 1963, the leve...

NASA satellite data provides rapid analysis of Amazon deforestation

... an incredible amount of heat is released into the atmosphere - making the tropics the Earth's primary source of heat redistribution. And, because of the Amazon's location, any sort of weather hiccup from the area could signal serious changes for the rest of the world like droughts and severe storms. Global cl...

Tropical Deforestation affects rainfall in the U.S. and around the globe

... an incredible amount of heat is released into the atmosphere - making the tropics the Earth's primary source of...t of both sensible heat and that released into the atmosphere when water vapor condenses, called latent heat," said Avissar. "Associated changes in air pressure d...

NCAR analysis shows widespread pollution from 2004 wildfires

...simulated concentrations of carbon monoxide in the atmosphere with measurements taken by MOPITT. The researchers were able to get further confirmation by analyzing data from aircraft-mounted instruments that were taking part in a field project over North America and Europe. Pfister says the team is continuing ...

Climate change will affect carbon sequestration in oceans, model shows

...o help control rising carbon dioxide levels in the atmosphere and mitigate the effects of global warming. But, because the atmosphere interacts with the oceans, the net uptake of carbon dioxide and the oceans' sequestration capacity c...

How 'Dirt' Could Educate The Immune System And Help Treat Asthma

...o help control rising carbon dioxide levels in the atmosphere and mitigate the effects of global warming. But, because the atmosphere interacts with the oceans, the net uptake of carbon dioxide and the oceans' sequestration capacity c...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...NO2) is associated with nitrogen oxide (NO) in the atmosphere and the sum of the two is called NOX. This is rele...port, along with biomass burning, lightning in the atmosphere and microbial activity in the soil. The emission of nitrogen oxides has increased about six-fold sin...

'Acid rain' and forest mass: Another perspective

..., the amount of sulphur and nitrogen oxides in the atmosphere is greater than that derived from natural processes. These oxides, in the presence of water vapour and under the oxido-reduction conditions present in the atmosphere, produce acids that are deposited, amongst other places, on the forest biomass. Al...

Storing carbon to combat global warming may cause other environmental problems, study suggests

...tree plantations to remove carbon dioxide from the atmosphere to mitigate global warming -- so called "carbon sequestration" -- could trigger environmental changes that outweigh some of the benefits, a multi-institutional team led by Duke University suggested in a new report. Those effects include water and nut...

Amazon trees much older than assumed, raising questions on global climate impact of region

... And for Trumbore, who studies how forests and the atmosphere exchange carbon, these discoveries can have implications for the role the Amazon plays in determining global carbon dioxide levels. Carbon dioxide is a greenhouse gas implicated in accelerated global warming and the focus of international efforts to ...

Odd energy mechanism in bacteria analyzed

...e and water in the process. Oxygen in the Earth's atmosphere was largely created and is maintained by photosynt...oduce about half of the oxygen that enters Earth's atmosphere every day. The carbon cycle ultimately affects all plant and animal life on Earth. However, it's n...

NASA's AURA satellite peers into Earth's ozone hole

...icals were banned in 1995, and their levels in the atmosphere are decreasing. Another important factor in how m...ntists also monitor how much ozone there is in the atmosphere from the ground to space. The thickness of the Antarctic ozone layer was the third highest of the la...

Hot-spring bacteria flip a metabolic switch

...ng proteins and nucleic acids, but N2 gas from the atmosphere cannot be directly used for this purpose; it must first be reduced or fixed into larger, carbon-containing compounds. N2 fixation is a problem for photosynthetic cells, since the oxygen produced during photosynthesis inhibits the nitrogenase complex-...

Of mice, men, trees and the global carbon cycle

...at soak it up. The amount of carbon dioxide in the atmosphere is well known, as is the rate of emissions from fo...in the atmosphere, its rate of accumulation in the atmosphere would be two-and-a-half times as fast as it actually is and climate would change two-and-a-half time...

Deep-rooted plants have much greater impact on climate than experts thought

... of vegetation in removing carbon dioxide from the atmosphere and in local cooling through transpiration, they h...ts, letting them pull more carbon dioxide from the atmosphere as they conduct more photosynthesis," said co-author Todd Dawson, professor of integrative biology a...

The secret life of algae

...n maintaining the balance of carbon in the Earth's atmosphere require vitamin B12 to grow properly but it has been a mystery to scientists why some types needed external sources and others did not. Now researchers at the Universities of Cambridge and Kent have discovered that half of all algae have a dependent ...

Scientists find Antarctic ozone hole to recover later than expected

...g chlorine and bromine that have life spans in the atmosphere ranging from 45 to about 300 years, are affecting ozone. This new prediction model is a very useful step forward to refining our understanding of ozone hole recovery time scales." The researchers included ozone data from the Total Ozone Mapping Spec...

NASA study solves ocean plant mystery

... a tremendous amount of carbon that remains in the atmosphere that scientists previously thought were being remo...ake up billions of tons of carbon dioxide from the atmosphere through photosynthesis and use this carbon to create the food that nearly all other organisms on Ear...

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