Posted on May 6, 2014 by Bob Berwyn
A computer-generated split-screen image a split-image simulates the average 20 percent best (left) and 20 percent worst 20 percent (right) visibility at the Long’s Peak vista based on an average of monitored data for years 2000-2004.
Very likely without cuts in pollutants, study says
FRISCO — By 2050, many Americans will see their chances of experiencing unhealthy summertime ozone levels increase by 70 percent, according to scientists with the National Center for Atmospheric Research. Warmer temperatures will make the toxic brew of air pollutants even more volatile unless emissions of specific pollutants that are associated with the formation of ozone are sharply cut, the researchers said in a new study published this week.
Almost all of the continental United States will experience at least a few days with unhealthy air during the summers, the research shows. Heavily polluted locations in parts of the East, Midwest, and West Coast where ozone already frequently exceeds recommended levels could face unhealthy air during most of the summer. Continue reading
Filed under: air quality, climate and weather, Environment, global warming, greenhouse gases | Tagged: climate change impacts, global warming, greenhouse gases, ozone pollution, smog | 1 Comment »
Posted on April 26, 2014 by Bob Berwyn
The Earth’s atmosphere can’t take a lot more methane.
Possible new rule would target methane from existing mining operations
By Summit Voice
FRISCO — While federal efforts to cut carbon dioxide emissions are still up in the air due to political and legal uncertainty, the Bureau of Land Management is taking public on a possible new rule to tackle heat-trapping methane from coal mining operations. In a prepared statement announcing the outreach effort, BLM officials said that reducing methane emissions is a powerful way to take action on climate change.
“We welcome public input on ways in which we can both increase mine safety and improve the health of our environment,” said BLM Director Neil Kornze. “We will work with federal, state and local officials as well as with industry and nongovernmental organizations to explore ways to responsibly reduce methane emissions,”
Filed under: air quality, climate and weather, Environment, global warming | Tagged: Environment, global warming, greenhouse gases, methane emissions | 1 Comment »
Posted on April 20, 2014 by Bob Berwyn
Findings shed new light in links between temperatures, CO2 and glaciation
How will Antarctic ice sheets and glaciers respond to global warming? bberwyn photo.
FRISCO — The relationship between global temperatures and the massive glaciation of historic ice ages may be a bit more complex than previously believed.
By studying the chemical composition of Mediterranean Sea fossils as old as 5.3 million years, scientists found a new way to assess sea-level changes and deep-sea temperature variability over the past 5.3 million years. The findings will result in a better understanding of ice age climate, and could offer new insight into the relationship between carbon dioxide levels, global temperatures and sea levels. Continue reading
Filed under: climate and weather, global warming | Tagged: climate, global warming, greenhouse gases, ice age | Leave a comment »
Posted on April 14, 2014 by Bob Berwyn
Curbing global warming will require big cuts in greenhouse gases
March 2014 temperatures were above average across most of the globe.
By Summit Voice
FRISCO —Greenhouse gas emissions continue to climb despite international attempts to curb heat-trapping gases, the Intergovernmental Panel on Climate Change said in its latest climate report.
Issued Sunday in Berlin, the report shows that greenhouse gas emissions grew more quickly between 2000 and 2010 than in each of the three previous decades. Only with significant institutional, social and technological changes will humankind be able to meet its stated target of limiting warming to two degrees Celsius, the scientists wrote. Continue reading
Filed under: climate and weather, global warming | Tagged: climate change, Environment, global warming, greenhouse gases, IPCC | 2 Comments »
Posted on April 12, 2014 by Bob Berwyn
Statistical analysis of temperature data affirms climate models
Warmer than average temperatures prevailed across most of the globe in March 2014.
FRISCO — A new statistical analysis of temperature records dating back to 1500 suggests it’s more than 99 percent certain that the past century of global warming is caused by the emission of heat-trapping, industrial-age greenhouse gases. The study was published online April 6 in the journal Climate Dynamics.
In a press release, the McGill University researchers said the study doesn’t use complex computer models to estimate the effects of greenhouse-gas emissions. Instead, it examines historical data to assess the competing hypothesis that warming over the past century is due to natural long-term variations in temperature. The results all but rule out the possibility that global warming in the industrial era is just a natural fluctuation in the earth’s climate. Continue reading
Filed under: climate and weather, Environment, global warming | Tagged: climate, Environment, global warming, greenhouse gases | 1 Comment »
Posted on March 28, 2014 by Bob Berwyn
New study assesses freshwater methane on a global scale
Microorganisms in freshwater ecosystems generate significant amounts of methane.
FRISCO — After recalculating Earth’s greenhouse gas budget, Princeton scientists say that methane emissions will start increasing at a faster pace than carbon dioxide, primarily due to the release of methane from microscopic freshwater organisms.
Methane is about 30 times more effective than CO2 at trapping the sun’s heat, and for every degree of warming, methane emissions will increase several times over, according to the research published in Nature.
Filed under: climate and weather, Environment, global warming | Tagged: carbon dioxide, climate change, global warming, greenhouse gases, methane | 1 Comment »