Tag: glaciers

Are Greenland glaciers on the verge of crumbling?

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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

Staff Report

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 “Are Greenland glaciers on the verge of crumbling?”

Morning photo: Southern Iceland

Find you bliss …

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.

Climate: Scientists say Arctic ice loss speeding up

Researchers try to pinpoint sea level rise projections

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Greenland’s glaciers are retreating inland rapidly. @bberwyn photo.

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 “Climate: Scientists say Arctic ice loss speeding up”

Report: Little doubt that global warming will eradicate the world’s glaciers and ice sheets

‘The big picture across the world and over the long run is clear — carbon dioxide is making the ice melt’

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A Greenland glacier shows signs of wear and tear during the peak of the summer melt season. @bberwyn photo.

Staff Report

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 “Report: Little doubt that global warming will eradicate the world’s glaciers and ice sheets”

Climate: Not every ice age ends the same way

Meeting in Uruguay, an Antarctic science committe advocated for the 2012 establishment of marine reserves in the Southern Ocean and the Ross Sea. PHOTO BY BOB BERWYN.
How will the meltdown go this time?

Study finds link between Arctic and Antarctic ice sheet meltdowns

Staff Report

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 “Climate: Not every ice age ends the same way”

Are Mt. Everest’s glaciers doomed by global warming?

‘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.
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.
Scientists are trying to pinpoint the impacts of global warming on Himalayan glaciers and regional water supplies. Photo courtesy Nasa Earth Observatory.

Staff Report

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 “Are Mt. Everest’s glaciers doomed by global warming?”

Global warming meltdown projected for Canada’s glaciers

Ice loss will affect hydropower, freshwater ecosystems

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Staff Report

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 “Global warming meltdown projected for Canada’s glaciers”