Posted on November 16, 2015 by Bob Berwyn
Some of Greenland’s biggest glaciers may be on the verge of crumbling into the sea, according to new satellite data. @bberwyn photo.
Study tracks rapid retreat of major ice streams
Scientists may not have to wait too much longer to observe firsthand the effects of global warming on Greenland’s ice sheets. One of the largest glaciers in Greenland entered “a phase of accelerated retreat in 2012,” and may be near a climate tipping point, according to new research published in the current issue of Science.
After studying the Zachariae Isstrom, scientists with the University of California, Irvine, said it’s starting to break up.
“North Greenland glaciers are changing rapidly,” said Jeremie Mouginot, an assistant researcher with UCI’s department of earth system science. “The shape and dynamics of Zachariae Isstrom have changed dramatically over the last few years. The glacier is now breaking up and calving high volumes of icebergs into the ocean, which will result in rising sea levels for decades to come.” Continue reading
Filed under: Arctic, climate and weather, global warming, Greenland | Tagged: Environment, glaciers, global warming, greenland, sea level rise | Leave a comment »
Posted on September 12, 2015 by Bob Berwyn
Find you bliss …
The glacial lagoon at Jökulsárlón.
At the glacial tongue of the Sólheimajökull in southern Iceland.
Pano view at Jökulsárlón.
Happy campers in southern Iceland.
On our way to Austria, we took advantage of Iceland Air’s liberal stopover policy and spent a couple of days touring the island’s southern coast in a mini-campervan. It’s coast Highway 1, just like in California, except for the volcanoes, glaciers and lamb-burgers in the roadside truck stops. The glacial lagoon at Jökulsárlón has long been on the list, so we bee-lined for it the first day, then took our time heading back to Reykjavik, with stops at hot springs, waterfalls and lava cliffs along the way. More to come, so stay tuned.
Filed under: Europe, Geology, Iceland, Morning photo, photography, Travel | Tagged: glaciers, Iceland, Jökulsárlón, mobile photography, photography, Travel | 3 Comments »
Posted on August 27, 2015 by Bob Berwyn
Researchers try to pinpoint sea level rise projections
By Bob Berwyn
FRISCO — Sea level is set to rise at least three feet during the next few decades, NASA scientists and ice researchers said this week, updating their latest research and findings on how fast the world’s ice sheets and glaciers are melting.
The scientists said they’re still not sure exactly how fast the water will rise, but they’re getting closer to nailing down the timing, thanks to several ongoing research projects, including a five-year effort to measure ice loss around the edge of Greenland.
The goal, of course, is to help coastal communities prepare for the big changes ahead. Agriculture, transportation and other infrastructure like water treatment plants will all be affected by sea level rise. Continue reading
Filed under: climate and weather, Environment, global warming, Greenland | Tagged: climate change, glaciers, global warming, greenland, ice sheets, sea level rise | Leave a comment »
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 June 12, 2015 by Bob Berwyn
How will the meltdown go this time?
Study finds link between Arctic and Antarctic ice sheet meltdowns
FRISCO — Climate shifts have played out in different ways in the past, scientists concluded in a new study, after finding that a dramatic ice sheet collapse at the end of the ice age before last caused widespread climate changes and led to a peak in the sea level well above its present height.
The team found the events 135,000 years ago caused the planet to warm in a different way to the end of the most recent ice age about 20,000 to 10,000 years ago. The findings will help scientists understand the processes that control Earth’s dramatic climate changes, said the leader of the study, Dr. Gianluca Marino of The Australian National University’s School of Earth Sciences. Continue reading
Filed under: Arctic, climate and weather, global warming | Tagged: climate change, climate shift, glaciers, global warming, ice age | Leave a comment »
Posted on May 27, 2015 by Bob Berwyn
‘The signal of future glacier change in the region is clear: continued mass loss from glaciers is likely’
Researchers taking measurements in the Mera Glacier region of the Dudh Kosi basin. Photo courtesy Patrick Wagnon.
Scientists are trying to pinpoint the impacts of global warming on Himalayan glaciers and regional water supplies. Photo courtesy Nasa Earth Observatory.
FRISCO —In the worst-case global warming scenario, glaciers in the Mt. Everest region — the roof of the world — could shrink between 70 percent and 99 percent by 2100, scientists said this week, waring of dire downstream consequences for millions of people who rely on water from those ice fields.
“The signal of future glacier change in the region is clear: continued and possibly accelerated mass loss from glaciers is likely given the projected increase in temperatures,” said Joseph Shea, a glacier hydrologist at the International Centre for Integrated Mountain Development, Kathmandu, Nepal, and leader of the study. Continue reading
Filed under: climate and weather, climate change, global warming | Tagged: climate change impacts, Dudh Kosi River Basin, glaciers, global warming, Himalaya, Mt Everest, Nepal | Leave a comment »
Posted on April 7, 2015 by Bob Berwyn
Ice loss will affect hydropower, freshwater ecosystems
FRISCO — Global warming is likely to melt up to 70 percent of the glacial ice in western Canada by the end of the century. The meltdown will disrupt ecosystems and power supplies, and also affect water quality and wildlife habitat, according to scientists with the University of British Columbia. Continue reading
Filed under: climate and weather, global warming | Tagged: Canada, climate change, glaciers, global warming | Leave a comment »