polar science
December 6, 2024
Record-low Antarctic sea ice can be explained and forecast months out by patterns in winds
University of Washington researchers show that the all-time record low in winter sea ice extent in 2023 can be explained by warm Southern Ocean conditions and patterns in the winds that circled Antarctica months earlier, allowing forecasts for sea ice coverage around the South Pole to be generated six or more months in advance. This could support regional and global weather and climate models.
October 22, 2024
Paws of polar bears sustaining ice-related injuries in a warming Arctic
Polar bears in some parts of the high Arctic are developing ice buildup and related injuries to their feet. The changes appear to be an unexpected consequence of climate change, related to changing conditions in a warming Arctic.
February 28, 2024
80 mph speed record for glacier fracture helps reveal the physics of ice sheet collapse
New research documents the fastest-known large-scale breakage along an Antarctic ice shelf. In 2012, a 6.5-mile crack formed in about 5 and a half minutes, showing that ice shelves can effectively shatter, though the speed of breakage is reduced by seawater rushing in. These results can help improve ice-sheet models and projections for future sea level rise.
September 15, 2023
Polar experiments reveal seasonal cycle in Antarctic sea ice algae
The frigid ocean surrounding Antarctica is home to much of the region’s photosynthetic life. A new University of Washington study provides the first measurements of how sea-ice algae and other single-celled life handle dramatic seasonal swings, offering clues to how this ecosystem might adapt to climate change.
August 31, 2023
Study connects greenhouse gas emissions to polar bear population declines, enabling greater protections under Endangered Species Act
A new paper from the UW and Polar Bears International quantifies the relationship between greenhouse gas emissions and the survival of polar bear populations. The paper combines past research and new analysis to provide a quantitative link between greenhouse gas emissions and polar bear survival rates.
May 23, 2023
Q&A: UW polar bear expert appears in BBC-produced film about the Arctic
Polar scientist Eric Regehr studies polar bears on Wrangel Island, an island off Russia that is home to the highest concentration of polar bears in the world. Regehr and UW glaciologist Ian Joughin will field audience questions after screenings of “Arctic: Our Frozen Planet,” which focuses on the changing Arctic environment.
January 18, 2023
The importance of the atmosphere and ocean in determining the fate of Antarctica
New research finds that ice-sheet-wide collapse in West Antarctica isn’t necessarily inevitable. The pace of ice loss varies according to regional differences in atmosphere and ocean circulation.
November 29, 2022
Strongest Arctic cyclone on record led to surprising loss of sea ice
The strongest Arctic cyclone ever observed struck in January 2022. A new analysis led by the University of Washington shows that while forecasts accurately predicted the massive storm, models seriously underestimated its impact on sea ice. Results suggest how forecast models for a changing Arctic Ocean could improve.
June 16, 2022
Newly documented population of polar bears in Southeast Greenland sheds light on the species’ future in a warming Arctic
A new population of polar bears documented on the southeast coast of Greenland use glacier ice to survive despite limited access to sea ice. This small, genetically distinct group of polar bears could be important to the future of the species in a warming world.
March 28, 2022
Solar energy explains fast yearly retreat of Antarctica’s sea ice
Sea ice around Antarctica retreats more quickly than it advances, an asymmetry that has been a puzzle. New analysis shows that the Southern Hemisphere is following simple rules of physics, as peak midsummer sun causes rapid changes. In this respect, it seems, it’s Arctic sea ice that is more mysterious.
March 10, 2022
Newest satellite data shows remarkable decline in Arctic sea ice over just three years
In the past 20 years, the Arctic has lost about one-third of its winter sea ice volume, and winter sea ice in the Arctic has lost about a foot and a half of thickness over just the past three years. This thinning is largely due to loss of older, multiyear sea ice that is more resistant to melting.
September 14, 2021
UW part of $25M NSF-funded effort to retrieve Earth’s oldest ice core
University of Washington glaciologists will join colleagues from around the country in a new effort to retrieve an ice core more than 1 million years old from East Antarctica, to better understand the history of our planet’s climate and predict future changes.
June 11, 2021
Edge of Pine Island Glacier’s ice shelf is ripping apart, causing key Antarctic glacier to gain speed
Satellite images show that from 2017 to 2020, Pine Island Glacier’s ice shelf lost about one-fifth of its area, mostly in three dramatic breaks. This caused the glacier to speed up by 12%, hastening its downward motion and boosting its contribution to rising seas.
June 3, 2021
South Pole and East Antarctica warmer than previously thought during last ice age, two studies show
University of Washington glaciologists are co-authors on two papers that analyzed Antarctic ice cores to understand the continent’s air temperatures during the most recent glacial period. The results help understand how the region behaves during a major climate transition.
March 22, 2021
Warming temperatures tripled Arctic lightning strikes over the past decade
Lightning strikes in the Arctic tripled from 2010 to 2020, a finding University of Washington researchers attribute to rising temperatures due to human-caused climate change. The results, researchers say, suggest Arctic residents in northern Russia, Canada, Europe and Alaska need to prepare for the danger of more frequent lightning strikes.
February 24, 2021
Record-high Arctic freshwater will flow through Canadian waters, affecting marine environment and Atlantic ocean currents
The Arctic Ocean’s Beaufort Sea has increased its freshwater content by 40% over the past two decades. When conditions change this freshwater will travel to the Labrador Sea off Canada, rather than through the wider marine passageways that connect to seas in Northern Europe. This has implications for local marine environments and global ocean circulation.
December 8, 2020
NSF-funded deep ice core to be drilled at Hercules Dome, Antarctica
Antarctica’s next deep ice core, a 1.5-mile core reaching back to 130,000-year-old ice, will be carried out by a multi-institutional U.S. team led by UW’s Eric Steig. The site hundreds of miles from today’s coastline could provide clues to the most recent collapse of the West Antarctic Ice Sheet.
September 30, 2020
Greenland is on track to lose ice faster than in any century over the past 12,000 years, study finds
A new study combines ice cores, geologic records and computer models to understand the past, present and future of the Greenland Ice Sheet. The results show that emissions this century have a big influence on how much ice will be lost from Greenland.
September 23, 2020
Some polar bears in far north are getting short-term benefit from thinning ice
The small subpopulation of polar bears in Kane Basin were doing better, on average, in recent years than in the 1990s. The bears are experiencing short-term benefits from thinning and shrinking multiyear sea ice that allows more sunlight to reach the ocean surface, which makes the system more ecologically productive.
April 30, 2020
First results from NASA’s ICESat-2 map 16 years of melting ice sheets
Loss of ice from Antarctic and Greenland ice sheets since 2003 have contributed 0.55 inches to global sea level rise, with about two thirds coming from Greenland ice. The new, detailed satellite measurements provide a global picture of ice sheet change — and insights into the future of Greenland and Antarctica.
February 27, 2020
Video: Warming Arctic means less ice, bigger waves
Throughout the month of November 2019, a team of University of Washington researchers chased storms in the Arctic Ocean. The project, Coastal Ocean Dynamics in the Arctic, or CODA, is looking at how water currents shift and waves hit the coast with more open water, to provide better forecasts and predictions for the region’s future.
February 12, 2020
Polar bears in Baffin Bay skinnier, having fewer cubs due to less sea ice
Satellite tracking of adult females and visual monitoring of polar bears in Baffin Bay show changes from the 1990s to the period from 2009 to 2015. Bears in Baffin Bay are getting thinner and adult females are having fewer cubs than when sea ice was more available.
December 12, 2019
Video: Barrels of ancient Antarctic air aim to track history of rare gas
An Antarctic field campaign last winter led by the U.S. and Australia has successfully extracted some of the largest samples of air dating from the 1870s until today. Researchers will use the samples to look for changes in the molecules that scrub the atmosphere of methane and other gases.
November 5, 2019
Fall storms, coastal erosion focus of northern Alaska research cruise
A University of Washington team is leaving to study how fall storms, dwindling sea ice and vulnerable coastlines might combine in a changing Arctic.
September 20, 2019
Two UW ice researchers to participate in year-long drift across Arctic Ocean
Two UW researchers — Bonnie Light, a principal physicist at the UW’s Applied Physics Laboratory and an affiliate associate professor of atmospheric sciences, and Madison Smith, a recent UW graduate who is now doing her postdoctoral research at the UW — will join for the fifth of the six two-month legs, in summer 2020.
August 12, 2019
First evidence of human-caused climate change melting the West Antarctic Ice Sheet
A new study by U.S. and U.K. scientists finds that in addition to natural variations in winds that drive warmer water to the West Antarctic Ice Sheet, which last about a decade, there has been a longer-term change in the winds that can be linked with human activities.
July 11, 2019
Super salty, subzero Arctic water provides peek at possible life on other planets
A UW team has discovered thriving communities of bacteria in Alaskan “cryopegs,” trapped layers of sediment with water so salty that it remains liquid at below-freezing temperatures. The setting may be similar to environments on Mars, Saturn’s moon Titan, or other bodies farther from the sun.
June 10, 2019
Mysterious holes in Antarctic sea ice explained by years of robotic data
Why did a giant hole appear in the sea ice off Antarctica in 2016 and 2017, after decades of more typical sea ice cover? Years of Southern Ocean data have explained the phenomenon, helping oceanographers to better predict these features and study their role in global ocean cycles.
April 25, 2019
Public talks kick off study of ice loss, warming and coastal changes in northern Alaska
A UW team will visit Alaska’s North Slope Borough the week of April 28 in preparation for a two-year study of how waves, ice loss and warming are affecting the low-lying region.
March 4, 2019
Mystery of green icebergs may soon be solved
Research by UW’s Stephen Warren suggests that some icebergs are green because they contain frozen, iron-rich seawater from certain regions of East Antarctica.
February 28, 2019
Polar science, climate change and, yes, dance mix this weekend at Pacific Science Center
Exhibits and events happening Friday through Sunday showcase the latest in polar science, much of it from the University of Washington.
January 23, 2019
One year into the mission, autonomous ocean robots set a record in survey of Antarctic ice shelf
A team of ocean robots developed at the UW is the first group of self-guided ocean instruments to travel under an ice sheet and come back to report long-term observations.
December 18, 2018
February’s big patch of open water off Greenland? Not global warming, says new analysis
New analysis shows that odd winds, not warming, caused the unusual patch of open water north of Greenland last February.
November 14, 2018
First tally of U.S.-Russia polar bears finds a healthy population
The first assessment of polar bears that live in the biologically rich Chukchi Sea region that spans the U.S. and Russia, finds that the population is healthy and not yet suffering from declining sea ice.
September 10, 2018
UW polar scientists advised NASA on upcoming ICESat-2 satellite
Two UW polar scientists were among a dozen experts who advised NASA on its upcoming ICESat-2 mission to monitor the 3D surface of the Earth. The mission is scheduled to launch Sept. 15 from California.
September 6, 2018
Volcano under ice sheet suggests thickening of West Antarctic ice is short-term
Evidence left by a volcano under the ice sheet suggests that the observed bulging of ice in West Antarctica is a short-term feature that may not affect the glacier’s motion over the long term.
July 2, 2018
Study identifies which marine mammals are most at risk from increased Arctic ship traffic
Regions of Arctic water are becoming ice-free in late summer and early fall. A new study is the first to consider potential impacts on the marine mammals that use this region and identify which populations will be the most vulnerable to ships.
June 4, 2018
Polar scientist Kristin Laidre documents perspectives of polar bear hunters in East Greenland
Twenty-five polar bear hunters in East Greenland were interviewed before the first formal assessment of this subpopulation, one of 19 subpopulations of polar bears in a changing Arctic.
May 23, 2018
A promising target in the quest for a 1-million-year-old Antarctic ice core
The oldest ice core so far provides 800,000 years of our planet’s climate history. A UW field survey in Antarctica has pinpointed a location where an entire million years of undisturbed ice might be preserved intact.
May 8, 2018
UW researchers will survey Antarctica’s Thwaites Glacier as part of major international effort
UW glaciologist Knut Christianson is part of a massive collaboration that will collect on-the-ground data about a key Antarctic glacier that shows signs it could be collapsing into the sea.
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