Ancient supernova may have triggered eco-catastrophe
...t on the Earths ozone layer, an upper layer of the atmosphere that absorbs harmful ultraviolet emissions from the sun and other sources. This would have produced a significant reduction in phytoplankton abundance and biomass, with devastating effects on other marine populations, such as bivalves, Bentez says. ...... emissions, while ozone pollution is formed in the atmosphere from pollutants released by both vehicles and industrial sources. A number of recent studies conducted by Ritz and other researchers have suggested that air pollution can have harmful effects on pregnancy, including causing premature delivery and low...Geophysicist studies life in the early solar system
... Earth`s surface, where the effects of the burning atmosphere would have been muted to a survivable 100 C (212 F...especially from a small planet like Mars where the atmosphere is thin and gravity is relatively weak. ``You don`t sterilize a milk bottle by throwing it off your ......ruz. Whether carbon dioxide is released in the atmosphere or the ocean, eventually about 80 percent of the c...r form before injection, it will degas back to the atmosphere when diffusion or ocean circulation returns it to the ocean surface.In ocean fertilization, the biol...Forest management may mitigate global warming
...ming. More trees, they argue, will remove from the atmosphere more carbon dioxide, a gas plants use to grow and ...a decade-long study of carbon exchange between the atmosphere and Harvard Forest, a 60-year-old forest stand dominated by northern red oaks. Specifically, they me...Nanoparticles in air bad news for people
.... Photochemical reactions of air pollutants in the atmosphere can also yield small particles that can undergo changes in size, shape and chemical composition. Mengdawn Cheng of the Environmental Sciences Division is tracking and characterizing the "nanoparticles" in the Smokies and 29 other sites. He is also ex...University of Cincinnati researchers track climate changes in Arctic thaw lakes
...erstanding of the role of interactions among land, atmosphere and ice in the functioning of the Arctic System, with an emphasis on improving the predictability of the Arctic System's responses to global change. "The Arctic plays a crucial role in global change because it responds sensitively to changes in clim...Skin expert issues winter sports warning
...heir risk of serious sunburn because there is less atmosphere to filter the UV rays. In general the air filters 4% less UV rays for every 1,000 feet above sea level - meaning that at an altitude of 5,000 feet - and most ski resorts in Europe and the US stand at or above this height there is 20% more UV radiat...Land wont soak up carbon indefinitely say top scientists
...there appears to be a net release of carbon to the atmosphere during warm, dry years and a net uptake during coo... from permanent, subsidy to humans, protecting the atmosphere from many of the consequences of deforestation and burning fossil fuels."...Ecosystems slowed 1990s greenhouse gas buildup
.... In the 1980s theamount of carbon released to the atmosphere from deforestation aboutequaled that taken up by land ecosystems into various "sinks." Duringthe 1990s the balance tipped, and 1.4 billion tons more carbon endedup in the land-based biosphere than in the atmosphere, despitecontinuing deforestation. L...Efficient fertilizer use could benefit river without hurting crop yields
...tatistics and estimates of nitrogen input from the atmosphere in rainfall. Most of the data were compiled under the leadership of Donald Goolsby, a scientist with the U.S. Geological Survey, another collaborator. "We conducted a very comprehensive uncertainty assessment of the model and its inputs," said Georg......letal muscle satellite cells grown in a laboratory atmosphere of 20 percent oxygen to cells grown with the 2 per...signed facility, which she can adjust to create an atmosphere with specific amounts of oxygen and other gases. "The big surprise was that satellite cells isolated...Crater makes an impact on three sessions at GSA
...d millions of tons of debris were ejected into the atmosphere within minutes. Marine life was decimated, and a train of giant waves of seawater inundated the land, explains Powers, whose talk Structure and Composition of the Southwestern Margin of the Buried Chesapeake Bay Impact Structure, Virginia is schedu...Autumn foliage may affect air quality, climate
...oplefind pleasing. But, Guenther explained: "In an atmosphere modified bypeople, plant emissions do contribute to pollution."...Mountain cloud forests imperiled by lowland deforestation, says Science study
...d heat transferred from the lowland surface to the atmosphere affects both the overall number of clouds formed and the height at which clouds form, says Lawton. Previous observational data and computer modeling suggest that deforestation, and conversion of forest to pasture or cropland, alters the land surface ...MIT prof: Oceans at risk if policy tool not restricted
...phytoplankton, that remove carbon dioxide from the atmosphere as part of their normal growth. Some of those organisms fall to the bottom of the sea, or are eaten and fall to the bottom as fecal matter, essentially moving carbon out of the air and into the deep. Entrepreneurs watching these developments have co...NASA unveils spectacular suite of new global data products
... global studies of how our planet's lands, oceans, atmosphere and life all interact to define our world's water ... is to observe and measure the interactions of the atmosphere with lands, oceans and life on our world. Another copy of the MODIS instrument will fly aboard Aqua ...Student discovers well-preserved embryo in dinosaur egg
...rth Carolina and that carbon dioxide levels in its atmosphere would have been four times higher than current levels. Such studies can reveal useful information about how higher carbon dioxide levels or global warming can affect our environment today, he says. Lamb's supervising professor is Dr. Dale Russell, r...Researchers uncover a piece of nature's secret nitrogen formula
...owing how Nature so easily pulls nitrogen from the atmosphere may lead to a better understanding of how the ecology may balance itself, and may eventually provide a safer, more economical method of nitrogen fixing for the multi-billion-dollar fertilizer industry....