Posted on October 15, 2014 by Bob Berwyn
Denmark-based research team seeks to pinpoint ice sheet melt factor
Large parts of the U.S. Gulf Coast could be swamped by rising seas.
Coastal tidal flooding is already causing transportation problems near Venice, Louisiana, USA. bberwyn photo
FRISCO — Developing accurate projections for sea level rise has been an elusive, high-priority goal for climate scientists. It’s certain that sea level will keep rising for centuries to come. But it’s not clear at what rate and pace that will happen, especially during the next few decades as coastal communities try to prepare.
Some factors, like thermal ocean expansion, can be established with some accuracy but researchers still aren’t sure exactly how the Greenland and Antarctic ice sheets will respond to warming.
In the latest number-crunching, scientists with the Niels Bohr Institute established that there’s little chance sea level will rise more than 1.8 meters (about 6 feet) by 2100. The results are published in the scientific journal Environmental Research Letters. Continue reading
Filed under: climate and weather, global warming | Tagged: climate, Environment, global sea level rise, Greenland ice sheet, IPCC, West Antarctic Ice Sheet | Leave a comment »
Posted on July 23, 2014 by Bob Berwyn
Growth in sea ice may be slower than reported
Scientists are puzzling over the expansion of Antarctic sea ice. bberwyn photo.
FRISCO — Global warming deniers have long been using the observed expansion of Antarctic sea ice as a way to try and confuse the public about the reality of global warming, but some new research by scientists with the Scripps Institution of Oceanography at University of California San Diego suggests the rate of expansion is not as dramatic as reported.
The findings, published in The Cryosphere (European Geosciences Union) acknowledge that there has been some expansion recently, but that some of the reported ice gain may be due to inconsistencies in computer models used to measure Antarctic sea ice. Continue reading
Filed under: Antarctica, climate and weather, global warming | Tagged: antarctic sea ice, climate, global warming, IPCC | 1 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 7, 2014 by Bob Berwyn
Can we slow our greenhouse gas emissions? A global carbon tax could help.
Ending subsidies for fossil fuel companies also high on the list
FRISCO — A modest carbon tax of just $0.15 per kilo could lead the world down the path of meaningful action on global warming, says a Swedish researcher who was one of the coordinating lead authors of a new report that the Intergovernmental Panel on Climate Change will present next week.
“What we need to avoid dangerous climate change is the application of strong policy instruments,” said Thomas Sterner, professor of environmental economics at the University of Gothenburg. Continue reading
Filed under: climate and weather, energy, Environment, global warming | Tagged: carbon tax, climate change, Environment, global warming, IPCC | 1 Comment »
Posted on December 15, 2013 by Bob Berwyn
How warm will your town be at the end of the century?
November 2013 was the warmest on record for Planet Earth.
FRISCO — The jury may still be out on exactly how hot the Earth will be by the end of the century, but as climate models improve, scientists are narrowing the range.
In a recent effort to show changes on a regional scale, researchers with the U.S. Geological Survey and Oregon State University created a set of maps and summaries of historical and projected temperature and precipitation changes for the 21st century, down to a county level. Find your local global warming forecast here.
The maps and summaries are based on NASA downscaling of the 33 climate models used in the fifth annual Climate Model Intercomparison Project and the current Intergovernmental Panel on Climate Change Assessment Report. The resulting NASA dataset is on an 800-meter grid with national coverage. Continue reading
Filed under: climate and weather, Colorado, Environment, global warming | Tagged: climate, global warming, IPCC, local climate impacts | 1 Comment »
Posted on November 23, 2013 by Bob Berwyn
Many experts think seas could rise 2 meters by 2100
Sea level rise is already inundating parts of the Mississippi Delta. bberwyn photo.
By Summit Voice
FRISCO — Keeping sea level rise below 1 meter will require significant reductions in greenhouse gas emissions, a team of German and American researchers said this week after compiling the best available and most recent science.
Even with big cuts, sea level is expected to rise 40-60 centimeters by 2100 and 60-100 centimeters by 2300, according to the survey.
“While the results for the scenario with climate mitigation suggest a good chance of limiting future sea-level rise to one meter, the high emissions scenario would threaten the survival of some coastal cities and low-lying islands,” said Stefan Rahmstorf from the Potsdam Institute for Climate Impact Research. Continue reading
Filed under: climate and weather, Environment, global warming | Tagged: Environment, global warming, IPCC, sea level rise | Leave a comment »
Posted on October 22, 2013 by Bob Berwyn
New study says IPCC projections are too conservative
By Summit Voice
FRISCO — In a classic case of climate disruption, research shows that the dry season in southern Amazonia has lengthened by about one week per decade since 1979. Parts of the region may not be able to support rainforest vegetation much longer. A big forest die-back could trigger the release of large volumes of the greenhouse gas carbon dioxide into the atmosphere, a team of scientists warned this week.
The changes could disrupt plant and animal communities in one of the regions of highest biodiversity in the world, said University of Texas professor Rong Fu, who led the team of scientists. Continue reading
Filed under: climate and weather, Drought, Environment, global warming, greenhouse gases | Tagged: Amazon Rainforest, Climate disruption, global warming, Intergovernmental Panel on Climate Change, IPCC | Leave a comment »