Tag: "atmospheric" at biology news
Refrigerator disposal releases ozone-depleting chemicals
...nces over the next 300 years, he said. "The future atmospheric
concentrations of CFC-11, and their effect on the ... of these results may help evaluate changes in the atmospheric
concentrations of CFC-11 in the future," he said. "They add to the understanding of a very important...
How trees changed the world
... and by increased photosynthesis (fixation) led to atmospheric
CO2 stabilising at lower levels than the world had...n) over global respiration (carbon oxidation). As atmospheric
carbon dioxide was progressively reduced and photosynthesis reached unprecedented levels, the atmosp...
Climate change and coral reefs
... while calcification rates will fall due to higher atmospheric
concentrations of carbon dioxide (from fossil fuel burning). However, the adaptability of coral reefs is often underestimated, says Malcolm McCulloch (Australian School of Earth Sciences, Canberra), who presents his research at Earth System processes...
World land database charts a troubling course
...d use contributed significantly to the build-up of atmospheric
carbon dioxide, a major greenhouse gas. These are key issues related to land use and there's now a sense of urgency, says Ramankutty, as humans lock up the dwindling supply of the world's natural resources and change the chemical makeup of the atmo...
Scientists map the complete genome of an important agricultural bacterium
...l species with the remarkable ability to transform atmospheric
nitrogen into other chemicals a process called ni...n-fixing bacteria in the ground chemically convert atmospheric
nitrogen into ammonia a nitrogen-based compound that plants can use to produce proteins. Animals an...
Scientists call for development of ecological forecasting
...ict future climates based on expected increases in atmospheric
carbon dioxide, they don't necessarily view any of those models as predictions. Rather, they are explorations of what could happen, based on a particular scenario. In contrast, a weather forecast is intended to be the best estimate of what the weat...
First land plants and fungi changed earth's climate, paving the way for explosive evolution of land animals, new gene study suggests
...w types of animals could result from a decrease in atmospheric
carbon dioxide and a rise in oxygen caused by the ...turning to the atmosphere and effectively lowering atmospheric
carbon dioxide. "The Earth cools when you take away carbon dioxide," Hedges says. "Other factors ...
Mercury at bottom of central park lake linked to coal burning in NYC
...mes the amount found in some industrial areas. The atmospheric
input of mercury to the sediments is the highest I... the toxic residue. Bopps study showed the highest atmospheric
inputs of mercury in levels of sediment dating from the early 1900s, when coal use peaked in the New...
PNNL captures first bird's-eye view of Puget Sound air pollution
...air quality problems such as ozone and microscopic atmospheric
particles, called particulates. Levels of ozone in...r pollution in our region, no one has captured the atmospheric
data needed to understand how pollutants form, travel and interact within the Puget Sound area," sai...
American Chemical Society meets August 26-30 in Chicago
...ncluding the problems aerosols present in climate, atmospheric
changes, and human health....
Researchers explore wood smoke's threat to Great Lakes environment
...Great Lakes, she says. To determine the impact of atmospheric
pollutants on aquatic life in the Great Lakes, the...from wood burning was a significant contributor to atmospheric
particulate matter pollution in both the Los Angeles basin and Californias San Joaquin Valley in win...
Climate plays bigger role than CO2 in make-up of plant communities
...re was a worldwide, relatively uniform increase in atmospheric
carbon dioxide concentrations. Brenner said that if carbon dioxide played the major role in determining plant composition, one would assume that analysis of the sediments would reveal very similar changes in relative abundance of C3 and C4 plants in...
Research season will feature use of sophisticated technologies to map Antarctica
... internal layerreflections and bedrock topography, atmospheric
samples, and meteorological readings to understand the current climate of the ice sheet. These data will contribute to a better understanding of the West Antarctic ice sheet both today and in the recent past. KILLER WHALES: Working aboard a U.S. C...
Worlds largest scientific society convenes regional meeting October 10-13 in Lincoln, Neb.
...e to their high global warming potentials and long atmospheric
lifetimes, yet they remain a vital part of the manufacturing process until suitable alternatives can be found. The researcher has developed a new method for disposing of PFC emissions that does not release them to the atmosphere. (Kayla Hamersky, Uni...
NASA unveils spectacular suite of new global data products
... measures ocean parameters together with important atmospheric
variables, like aerosols and clouds, to give scientists a much more complete understanding of the ocean-atmosphere climate interactions. NASA's Terra satellite is the flagship of the Earth Observing System series of satellites, part of NASA's Earth S...
MIT prof: Oceans at risk if policy tool not restricted
...FERTILIZATION One potential technique for removing atmospheric
carbon involves fertilizing the oceans. "Our objec...s an environmentally benign, long-term solution to atmospheric
CO2 accumulation," write Chisholm and colleagues. "These claims are, quite simply, not true," they ...
Diversity of species triumphs
...ts ability to store carbon as biomass, rather than atmospheric
carbon dioxide. Their early results were controversial, however. Some scientists have asked whether the association between diversity and productivity might be a "sampling effect"; for example, plots with more species have a higher chance of containi...
Researchers zero in on date of early hominids
...y. Shaul Levi, a professor emeritus of oceanic and atmospheric
sciences at OSU, and Hagai Ron, an Israeli geophysicist, were able to narrow down the range of ages for the formation by studying the reversals of the Earth's magnetic field recorded in the sedimentary formation. "The Earth's magnetic field has reve...
Ecosystems slowed 1990s greenhouse gas buildup
...e of humanactivities. An unusually large uptake of atmospheric
carbon in the early 1990swas due to the climate's ...xpected computer models to show a largeincrease in atmospheric
carbon dioxide released by deforestationduring recent decades. In fact, no such increase emerged, in...
NSF awards two plant genome grants to University of Minnesota
...fa that, like alfalfa and other legumes, can "fix" atmospheric
nitrogen into a form plants can use as a fertilizer. The plant owes this ability to symbiosis with bacteria that infect its roots. The work will center on how the plant communicates with the bacteria, said Nevin Young, a professor of plant pathology ...
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