Posted on May 9, 2014 by Bob Berwyn
The world’s glaciers are dwindling.
CU Boulder scientists help lead mapping effort
FRISCO — Lots of quibbling over the exact rate and pace of glacier melt has at least partly obscured the grim reality that many of the world’s glaciated regions will see profound changes in the next few decades as global temperatures continue to rise.
That meltdown will raise sea level, but so far, nobody has been able to quantify the amount precisely. But new data gathered in a study led by University of Colorado, Boulder scientists should help. The team, including researchers from Trent University in Ontario, Canada recently completed the first mapping of virtually all of the world’s glaciers. That enables calculations of their volumes and ongoing contributions to global sea rise as the world warms. Continue reading
Filed under: climate and weather, global warming | Tagged: CU Boulder, Environment, glaciers, sea level rise | 1 Comment »
Posted on May 8, 2014 by Bob Berwyn
Warming temps around Greenland may be partly due to natural climate variability.
New study shows link between Pacific Ocean hotspot and North Atlantic weather patterns
FRISCO — Climate researchers and glaciologists have long been tracking the meltdown of Greenland’s glaciers. The region has been warming at the astounding rate of about 1 degree Celsius per decade — several times the global average — but part of that may be due to natural variability, according to a new study led by University of Washington scientists.
The research suggests up to half the recent warming in the area may be linked with climate patterns born in the tropical western Pacific rather than with the overall warming of the planet. Continue reading
Filed under: Arctic, climate and weather, global warming, Greenland | Tagged: Arctic, climate change, Environment, global warming, greenland, sea level rise | 1 Comment »
Posted on February 21, 2014 by Bob Berwyn
How fast will Antarctica’s Pine Island Glacier melt?
Findings suggest the West Antarctica glacier is very sensitive to environmental change
By Summit Voice
FRISCO — Antarctica’s Pine Island Glacier is likely to remain a significant factor in global sea level rise for decades to come, as a warming ocean melts the ice from beneath.
Geologists from the UK, USA and Germany used highly sensitive dating techniques, pioneered by one of the team, to track the thinning of the glacier through time, and to show that past thinning has lasted for several decades.
Rocks exposed by retreating or thinning glaciers provide evidence of past ice sheet change, which helps scientists to predict possible future change. The research results were published this week in Science. Continue reading
Filed under: climate and weather, global warming | Tagged: Antarctica, climate change, Environment, Piine Island Glacier, sea level rise | 1 Comment »
Posted on February 5, 2014 by Bob Berwyn
‘If we ignore this problem, the consequences will be dramatic’
Winter storm surge eats away a beach on the west coast of Florida. bberwyn photo.
By Summit Voice
FRISCO — Watching damage from individual megastorms like Hurricane Sandy and Typhoon Haiyan is bad enough, but the outlook for coming decades is downright scary.
According to new research, global average storm surge damages could increase from about $10-$40 billion per year today to up to $100,000 billion per year by the end of century without significant adaptation measures.
“If we ignore this problem, the consequences will be dramatic,” said Jochen Hinkel, a researcher with the Berlin-based think-tank Global Climate Forum. Continue reading
Filed under: climate and weather, Environment, global warming | Tagged: climate change impacts, coastal flood damage, extreme weather, global warming, sea level rise, Storm surge | Leave a comment »
Posted on February 4, 2014 by Bob Berwyn
New data shows at least one glacier moving at a record pace of 50 feet per day
By Summit Voice
FRISCO — Arctic ice researchers say detailed measurements show that one Greenland’s glaciers has been moving at a record speed the past few years.
The scientists with the University of Washington and the German Space Agency measured the movement of the Jakobshavn Isbræ (Jakobshavn Glacier) in 2012 and 2013, concluding that the glacier is moving four times as fast as during the 1990s.
“We are now seeing summer speeds more than 4 times what they were in the 1990s on a glacier which at that time was believed to be one of the fastest, if not the fastest, glacier in Greenland,” said Ian Joughin, a researcher at the Polar Science Center, University of Washington and lead-author of the study. Continue reading
Filed under: climate and weather, Environment, global warming | Tagged: climate change impacts, glaciers, global warming, greenland, sea level rise | Leave a comment »
Posted on December 6, 2013 by Bob Berwyn
Due to a combination of factors, sea level along the Atlantic Seaboard is rising much faster than the global average
By Summit Voice
FRISCO — The impacts of Hurricane Sandy may be a harbinger of future coastal devastation along the New Jersey shoreline, where sea level is rising much faster than the global average during the next century.
If the research by geoscientists at Rutgers and Tufts universities proves true, sea level in the region may rise by1.5 feet by 2050 and 3.5 feet by 2100 — that would mean that, by the middle of the century, the one-in-10 year flood level at Atlantic City would exceed any flood known there from the observational record, including Superstorm Sandy.
The study is based in part on an analysis of historic and modern-day records of sea-level rise in the U.S. mid-Atlantic region and builds on a recent study that reconstructed a 2,500-year record of sea level at the New Jersey shore. Continue reading
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Posted on December 5, 2013 by Bob Berwyn
Sea level is rising, and will continue to rise for centuries even if we cut greenhouse gas emissions.
Threats will increase regardless of hurricane activity
By Summit Voice
FRISCO — Increased damage to coastal property from rising sea levels is all but certain, according to a team of top researchers who urged a holistic approach to managing coastal systems. Regardless of changes in storm activity, rising sea levels will become the dominant driver of flooding and coastal damage, their study found.
“The potential for sea-level rise to dramatically change the landscape is an understudied aspect of coastal flooding,” said Jennifer Irish, an associate professor of civil and environmental engineering with the Virginia Tech College of Engineering. “For example, shoreline erosion, barrier-island degradation, and new tidal inlet formation — these sedimentary changes could lead to catastrophic changes in hurricane flood risk in some areas,” Irish said. Continue reading
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