Wednesday, December 12, 2012 - 10:00
The international Global Carbon Project consortium has announced that global carbon dioxide emissions in the atmosphere will reach a record high of 35.6 billion tons in 2012. The main reasons for the rise is the increase in carbon emissions caused by the combustion of fossil fuels. Scientists estimate that emissions from this source have increased by 2.6 percent compared to the previous year. The emissions thus exceed 1990 levels by almost 60 percent; 1990 is the base year for the Kyoto Protocol. The concentration of carbon dioxide in the atmosphere reached a new high in 2011 when levels reached 391 parts per million.
Tuesday, December 11, 2012 - 19:32
Fish play a far more important role as contributors of nutrients to marine ecosystems than previously thought, according to researchers at the University of Georgia and Florida International University. In a pair of papers in the journal Ecology, they show that fish contribute more nutrients to their local ecosystems than any other source-enough to cause changes in the growth rates of the organisms at the base of the food web.
Tuesday, December 11, 2012 - 19:22
Unique viruses called bacteriophages may play an important role in competition among bacterial strains, influencing the overall ecosystem of the human intestine, scientists at The University of Texas at Arlington and UT Southwestern Medical Center say.
Wednesday, December 5, 2012 - 12:54
Satellite observations have revealed the first direct evidence of smoke from Arctic wildfires drifting over the Greenland ice sheet, tarnishing the ice with soot and making it more likely to melt under the sun.
Wednesday, December 5, 2012 - 11:36
Two federal agencies have teamed to create the first-ever system for linking accurate assessments of risk from wildland fires to improved building codes, standards and practices that will help communities better resist the threat. The proposed Wildland Urban Interface (WUI) Hazard Scale addresses fires that occur where developed and undeveloped areas meet, and is described in a report released today by the U.S. Department of Commerce's National Institute of Standards and Technology (NIST) in collaboration with the U.S. Department of Agriculture's U.S. Forest Service (USFS).
Tuesday, December 4, 2012 - 15:17
Scientists using NASA satellite data and climate models have projected drier conditions likely will cause increased fire activity across the United States in coming decades. Other findings about U.S. wildfires, including their amount of carbon emissions and how the length and strength of fire seasons are expected to change under future climate conditions, were also presented Tuesday at the annual meeting of the American Geophysical Union in San Francisco.