Posted on August 22, 2015 by Bob Berwyn
‘The big picture across the world and over the long run is clear — carbon dioxide is making the ice melt’
A Greenland glacier shows signs of wear and tear during the peak of the summer melt season. @bberwyn photo.
FRISCO — Just like today, there were regional nuances in the Earth’s climate at the end of the last ice age — like solar radiation and ocean currents — that were factors in the meltdown of ice sheets and glaciers.
But the single biggest overriding cause was a global rise in temperatures caused by an increase in atmospheric carbon dioxide, a team of researchers said in a new study that measured isotopes in boulders that were uncovered during the global meltdown 11,000 years ago. Continue reading
Filed under: Arctic, climate and weather, climate change, global warming | Tagged: carbon dioxide, climate change, glacier meltdown, glaciers, global warming, greenhouse gases | Leave a comment »
Posted on August 20, 2015 by Bob Berwyn
All signs point toward more record-breaking heat ahead
Only a few small parts of the planet saw anywhere near average or below average temperatures in July 2015.
There is little question that average global temperatures have been soaring since the 1970s.
FRISCO — July 2015 was the hottest month on record for planet Earth by any measure, federal climate scientists said this week during their monthly global climate update. What’s more, the researchers are 99 percent sure that 2015 will end up as the hottest year since humankind has been tracking the climate, going back to about 1880.
That would break the record set just last year and is sure sign that greenhouse gases are inexorably heating the planet, despite year-to-year variations in the rate of warming. Continue reading
Filed under: climate and weather, Environment, global warming | Tagged: climate change, Environment, global warming, greenhouse gases, July 2015 global temperatures, National Climatic Data Center, NOAA | 1 Comment »
Posted on August 18, 2015 by Bob Berwyn
Cutting methane emissions is a key piece of the Obama administration’s climate strategy.
Cost of new regs estimated at $55 billion
FRISCO — Oil and gas drilling aren’t the only sources of methane. Landfills generate a significant amount of the heat-trapping gas as waste materials decompose in the ground. Now, the EPA wants to reduce those emissions amount by a third with a rule that would require landfills to collect and control methane.
According to the agency, municipal landfills are the third-largest source of methane, accounting for 18 percent of methane emissions in 2013 – the equivalent of approximately 100 million metric tons of carbon dioxide pollution. Continue reading
Filed under: climate and weather, climate change, global warming | Tagged: climate change, Environment, EPA, global warming, greenhouse gases, landfill methane rule, landfills, methane emissions | Leave a comment »
Posted on August 4, 2015 by Bob Berwyn
‘If we do not implement emissions reductions measures in line with the 2 degrees Celsius target in time, we will not be able to preserve ocean life as we know it’
FRISCO — Removing CO2 from the atmosphere as a last-ditch effort to avoid dangerous climate change probably wouldn’t be enough to ameliorate impacts to the world’s oceans, where the legacy of carbon pollution will likely play out for centuries to come in the form of deep ocean heat and increasing acidification.
These changes would linger even if the atmospheric carbon dioxide concentration were to be restored to pre-industrial levels at some point in the future, according to a new Nature Climate Change paper from an international team including Ken Caldeira, of the Carnegie Institution. This is due to the tremendous inertia of the ocean system. Continue reading
Filed under: climate and weather, climate change, global warming, ocean acidification | Tagged: climate change, Environment, global warming, greenhouse gases, ocean acidification | Leave a comment »
Posted on July 24, 2015 by Bob Berwyn
‘To fight global warming, we need real methane rules …’
FRISCO — A slew of recent studies showing how heat-trapping methane emissions have been consistently underestimated apparently didn’t have a big impact on the EPA, which has proposed a voluntary program to try and cut atmospheric methane buildup, with some mandatory regulations still in the works.
The Natural Gas STAR Methane Challenge Program (“Methane Challenge”) (PDF) (18 pp, 512K, About PDF) would provide a new mechanism enabling oil and gas companies cto track ambitious commitments to reduce methane emissions. According to the EPA, the program is based on extensive stakeholder outreach and reflects a revision of EPA’s previously proposed Gas STAR Gold framework. Continue reading
Filed under: air quality, climate change, fracking, gas drilling, global warming, oil drilling | Tagged: Environment, global warming, greenhouse gases, methane | Leave a comment »
Posted on July 22, 2015 by Bob Berwyn
In late June, smoke from wildfires in Canada streamed down over North Dakota, South Dakota, Minnesota, and Iowa. Photo courtesy NASA Earth Observatory.
New study tracks regional nuances, global trends
FRISCO — U.S. Forest Service scientists and other researchers say there has been a significant increase in the length of wildfire seasons on nearly every continent, with the exception of Australia. Fire weather seasons around the globe have increased by nearly 20 percent and the global burnable area doubled over the past 35 years.
Most vegetation types, except boreal forests, showed significant increases in the fire weather season length, the new study found. Some areas, such as the Western and Southeastern United States, Alaska, tropical and sub-tropical South America and Eastern Africa and large parts of Eurasia show a steady lengthening of the fire season from 1979-2013. Continue reading
Filed under: climate and weather, climate change, Environment, forest fires, forests, global warming, wildfires | Tagged: climate change, Environment, forest fires, global warming, greenhouse gases, Wildfires | Leave a comment »
Posted on July 1, 2015 by Bob Berwyn
Increasingly corrosive ocean waters pose a serious threat to shell-building species and other marine life.
‘Future generations will look back and wonder why we didn’t do everything we could to save the world’s oceans …’
FRISCO — Citing the growing threat to the world’s oceans, environmental advocates want the federal government to regulate carbon dioxide under the Toxic Substances Control Act.
The regulations have been used to limit emissions of other harmful chemicals, including chlorofluorocarbons, PCBs and asbestos.
“Time’s running out to avoid a mass extinction of wildlife in our oceans,” said Miyoko Sakashita, oceans director with the Center for Biological Diversity. “It may not look like a toxic chemical, but when there’s too much CO2 in the ocean, it turns seawater corrosive and dissolves the protective shells that marine animals need to survive,” Sakashita said. Continue reading
Filed under: Environment, global warming, greenhouse gases, Marine biology, ocean acidification, ocean conservation | Tagged: carbon dioxide, CO2, Environment, greenhouse gases, ocean acidification, oceans, Toxic Substances Control Act. | 1 Comment »