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.
Tag: Polar Science Center
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.
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.
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.
The region north of Greenland and the Canadian Arctic has been termed the Last Ice Area, where sea ice will remain the longest in summertime, providing a refuge for ice-dependent Arctic species. But conditions last summer show that parts of this region are already experiencing less summer ice due to climate change.
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.
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.
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.
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.
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.
With 2019 on pace as one of the warmest years on record, a new international study reveals how rapidly the Arctic is warming and examines global consequences of continued polar warming.
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.
A new study provides a 110-year record of the total volume of Arctic sea ice, using early U.S. ships’ voyages to verify the earlier part of the record. The longer record puts the recent loss into perspective.
Exhibits and events happening Friday through Sunday showcase the latest in polar science, much of it from the University of Washington.
New analysis shows that odd winds, not warming, caused the unusual patch of open water north of Greenland last February.
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.
A new study led by the University of Washington found that while dead whales are valuable sources of fat and protein for some polar bears, this resource will likely not be enough to sustain most bear populations in the future when the Arctic becomes ice-free in summers.
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.
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.
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.
Reductions in sea ice in the Arctic have a clear impact on animals such as polar bears that rely on frozen surfaces for feeding, mating and migrating. But sea ice loss is changing Arctic habitat and affecting other species in more indirect ways, new research finds. Beluga whales that spend summers feeding in the Arctic are diving deeper and longer to find food than in earlier years, when sea ice covered more of the ocean for longer periods, according to…
New findings could help scientists understand a little more about the elusive narwhal and how these marine mammals might fare in a changing climate.
A new analysis shows a properly-managed subsistence harvest of polar bears can continue under climate change.
Dramatic declines in Arctic sea ice during the past four decades are due to a mixture of global warming and a natural decades-long hot spot over Greenland.
University of Washington polar scientists are holding the 12th annual Polar Science Weekend, Friday through Sunday, March 3-5, at Pacific Science Center in Seattle. This year’s lineup includes a simulation from NASA of its new ICESat-2 instrument. Visitors can get scanned by an instrument above their head that measures a person’s height using an infrared distance sensor. The real ICESat-2 satellite, scheduled for launch in 2018, will map the Earth’s ice surfaces to very high precision, from space. During the…
A new, two-part project led by the UW’s Kristin Laidre aims to explore the interacting effects of climate change and subsistence hunting on polar bears, while also illuminating the cultural value of the species to indigenous peoples and the role they play in conservation.
Drainage of four interconnected lakes below Thwaites Glacier in late 2013 caused only a 10 percent increase in the glacier’s speed. The glacier’s recent speedup is therefore not due to changes in meltwater flow along its underside.
A new study led by the University of Washington finds the annual migration of some beluga whales in Alaska is altered by sea ice changes in the Arctic, while other belugas do not appear to be affected.
See also: “How Capt. James Cook’s intricate 1778 records reveal global warming today in Arctic” Seattle Times, Nov. 16 Harry Stern, a polar scientist at the University of Washington’s Applied Physics Laboratory, has been studying the Arctic Ocean for decades, and sailed part of the Northwest Passage in 2009. Stern’s latest work uses the earliest explorers’ experiences to better understand a maritime environment that still contains many unknowns. A paper published in November in Polar Geography uses Captain James Cook’s…
A new University of Washington study finds a trend toward earlier Arctic sea ice melt in the spring and later ice growth in the fall across all 19 polar bear populations, which can negatively impact the feeding and breeding capabilities of the bears.