Posted on March 27, 2015 by Bob Berwyn
U.S. automakers make progress on cutting emissions, the EPA says. bberwyn photo.
Overall average fleet efficiency at 24.1 miles per gallon
FRISCO — Automakers are stepping up the pace on reducing emissions, according to the EPA, which this week released a report showing that the industry overall outperformed the national greenhouse gas emissions standards by a wide margin for the second year in a row.
Compliance for model year 2013 was 1.4 miles per gallon better than required by the 2013 standard. The report presents detailed information about how individual firms are complying with GHG emissions standards for cars and light trucks. Continue reading
Filed under: air quality, energy, Environment, greenhouse gases | Tagged: auto emissions, auto fuel efficiency, climate change, EPA, global warming, greenhouse gases | 1 Comment »
Posted on January 31, 2015 by Bob Berwyn
Some research suggests vanishing ice could trigger volcanoes
Could the meltdown of Iceland’s glaciers result in more volcanic activity? bberwyn photo.
FRISCO — Like a baking cake, Iceland is rising up as global warming melts the island’s ice caps and glaciers.
Using detailed data from a network of 62 GPS monitoring sites, scientists showed, for example, that parts of south-central Iceland are moving upward as much as 1.4 inches (35 mm) per year — a speed that surprised the researchers, who linked the changes with global warming.
“What we’re observing is a climatically induced change in the Earth’s surface,” said University of Arizona geosciences professor Richard Bennett. “Iceland is the first place we can say accelerated uplift means accelerated ice mass loss,” Bennett said. Continue reading
Filed under: climate and weather, Environment, global warming, greenhouse gases | Tagged: climate change, global warming, Iceland, Iceland volcanoes | 1 Comment »
Posted on January 10, 2015 by Bob Berwyn
Going solar …
Public lands energy projects could generate 14,ooo megawatts when completed
FRISCO — Republicans in Congress may be scheming to try and block the EPA’s proposed greenhouse gas emission rules, but there’s no stopping the renewable energy train.
Last month, the Department of Interior released environmental studies for three proposed utility-scale solar energy projects in the Dry Lake Solar Energy Zone in Clark County, Nevada that could generate 480 megawatts of electricity on 3,083 acres within the Dry Lake Solar Energy Zone. Continue reading
Filed under: energy, Environment, greenhouse gases, renewable energy | Tagged: BLM, renewable energy, utility scale solar, Western Solar Plan | Leave a comment »
Posted on September 29, 2014 by Bob Berwyn
‘This is an event that is more extreme than any in the observed record, and our research suggests that global warming is playing a role right now’
Exceptionally dry conditions along parts of the West Coast that usually see copious moisture are highlighted in the NOAA soil moisture map taken from satellite data.
By Summit Voice
FRISCO — The California drought that will go down as the worst in the state’s recorded history may well be linked with increasing concentrations of heat-trapping pollutants — or not, depending who you ask.
In one new study, Stanford researchers said their analysis shows that formation of a persistent ridge of storm-blocking high pressure over the Pacific Ocean is three times more likely in presence of modern greenhouse gas concentrations.
But almost simultaneously, researchers with the National Oceanic and Atmospheric Administration said their survey of recent studies showed no link between global warming and lack of rainfall in California, though they did acknowledge the results of the Stanford led study, which focused on air pressure and the path of storms. Continue reading
Filed under: climate and weather, Drought, Environment, global warming, greenhouse gases | Tagged: California drought, climarte change, Environment, global warming, greenhouse gases | Leave a comment »
Posted on July 30, 2014 by Bob Berwyn
Cutting methane could slow global temperature surge.
Action could help avert climate tipping points
FRISCO — Leading scientists say the U.S. must do more to cut methane emissions from fossil fuel exploitation and other sectors to try and avoid reaching climate tipping points that could have disastrous implications.
Methane is a much more potent heat-trapping gas than carbon dioxide, but it only stays in the atmosphere for about 12 years, which means that big cuts could have a tangible short-term benefit in the race to cap global warming. Continue reading
Filed under: climate and weather, energy, Environment, global warming, greenhouse gases | Tagged: climate change, Environment, global warming, greenhouse gases, methane | Leave a comment »
Posted on May 30, 2014 by Bob Berwyn
Reading the history of Antarctica’s ice sheets is helping climate scientists project the future.
Transition from glacial periods punctuated by sudden surges of ice melt and sea level rise
FRISCO — Even without the addition of heat-trapping greenhouse gases from fossil fuel combustion, the Antarctica ice sheets may be vulnerable to sudden collapse and melting. One such episode, about 14,600 years ago, is thought to have caused sea level to rise by more than 12 feet in just 100 years.
Scientists are racing to understand the dynamics of the Antarctic ice sheets because of the potentially significant consequences of rapid changes, and in one of the newest studies, they’ve traced some of the big iceberg calving events between about 19,000 and 9,000 years ago by analyzing deep sea sediment cores extracted from the region between the Falkland Islands and the Antarctic Peninsula. Continue reading
Filed under: Antarctica, climate and weather, global warming, greenhouse gases | Tagged: Antarctic meltdown, Antarctica, climate change, global warming, sea level rise | 3 Comments »
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 »