Posts Tagged «2018»

UW News produced a video reporting on Kristin Laidre‘s recent study of carcasses of stranded whales as a food source for polar bears during past warm periods in the Arctic. The short clip accompanies the university news source’s article and interview of Kristin and co-authors. 

UW News covers Kristin Laidre‘s recent study of carcasses of stranded whales as a food source for polar bears during past warm periods in the Arctic. The university news source talks with Kristin and her co-authors and provides access to the research paper. 

PSC’s Ignatius Rigor brings his sea ice expertise to the podcast series Science Vs as they investigate the idea of the polar bear moving toward extinction. 

Regehr, E.V., Hostetter, N.J., Wilson, R.R., Rode, K.D., St. Martin, M., Converse, S.J. (2018), Integrated Population Modeling Provides the First Empirical Estimates of Vital Rates and Abundance for Polar Bears in the Chukchi Sea. Scientific Reports. 8: 16780,

Rode, K. D., R. R. Wilson, D. C. Douglas, V. Muhlenbruch, T. C. Atwood, E. V. Regehr, E. S. Richardson, N. W. Pilfold, A. E.Derocher, G. M. Durner, I. Stirling, S. C. Amstrup, M. St Martin, A. M. Pagano, and K. Simac. 2018. Spring fasting behaviorin a marine apex predator provides an index of ecosystem productivity. Global Change Biology 24:410‐423. 

Rode, K.D., Fortin-Noreus, J.K., Garshelis, D., Dyck, M., Sahanatien, V., Atwood, T., Belikov, S., Laidre, K.L., Miller, S., Obbard, M.E., Vongraven, D., Ware, J., Wilder, J., 2018. Survey-based assessment of the frequency and potential impacts of recreation on polar bears. Biological Conservation, 227: 121-132.

The Washington Post spreads the word about PSC’s Anthony Arendt’s current collaborative project, Community Snow Observations (CSO), a citizen snow-measuring program. Read more to learn how the public can participate and why measuring snow is part of the science.

A. Shepherd, E. Ivins, E. Rignot, B. Smith, M. van den Broeke, I. Velicogna, P. Whitehouse, K. Briggs, I. Joughin, G. Krinner, S. Nowicki, T. Payne, T. Scambos, N. Schlegel, G. A, C. Agosta, A. Ahlstrøm, G. Babonis, V. Barletta, A. Blazquez, J. Bonin, B. Csatho, R. Cullather, D. Felikson, X. Fettweis, R. Forsberg, H. Gallee, A. Gardner, L. Gilbert, A. Groh, B. Gunter, E. Hanna, C. Harig, V. Helm, A. Horvath, M. Horwath, S. Khan, K. K. Kjeldsen, H. Konrad, P. Langen, B. Lecavalier, B. Loomis, S. Luthcke, M. McMillan, D. Melini, S. Mernild, Y. Mohajerani, P. Moore, J.…

Smith, M., Stammerjohn, S., Persson, O., Rainville, L., Liu, G., Perrie, W., Robertson, R., Jackson, J. and Thomson, J., 2018. Episodic reversal of autumn ice advance caused by release of ocean heat in the Beaufort Sea. Journal of Geophysical Research: Oceans, 123(5), pp.3164-3185. doi: 10.1002/2018JC013764

Stern, H., A. Schweiger, J. Zhang, and M. Steele, On reconciling disparate studies of the sea-ice floe size distribution, Elementa, 6: 49. DOI:, 2018.

Stern HL, Schweiger AJ, Stark M, Zhang J, Steele M, Hwang B. Seasonal evolution of the sea-ice floe size distribution in the Beaufort and Chukchi seas. Elem Sci Anth. 2018;6(1):48,

The AP News talks to PSC’s Eric Regehr, the lead author of a polar bear study published in Scientific Reports. Regehr was involved in the first formal count of polar bears in waters between the United States and Russia. Despite being listed as a threatened species because of diminished sea ice due to climate change, Regehr and his colleagues estimate a healthy and abundant population in the Chukchi Sea off Alaska’s northwest coast.

T. C. Sutterley, T. Markus, T. Neumann, M. van den Broeke, J. M. van Wessem and S. Ligtenberg. Antarctic Ice Shelf Thickness Change from Multi-Mission Lidar Mapping. The Cryosphere, 2019.

T. C. Sutterley, I. Velicogna, X. Fettweis, E. Rignot, B. Noël and M. van den Broeke. Evaluation of reconstructions of snow/ice melt in Greenland by regional atmospheric climate models using laser altimetry data. Geophysical Research Letters, 45(16):8324–8333, 2018.

The Arctic Ocean has lost 95 percent of its oldest ice — a startling sign of what’s to comeIf the thinning trend continues, scientists fear an added boost to global warming.Chris Mooney of the Washington Post talked with Axel Schweiger and other scientists about sea ice loss in the Arctic

Alan Thorndike died on Jan 8, 2018 from an aggressive pneumonia. He was 72 years old. For those of you who don’t know, Alan was one of the original AIDJEX gang and founding PIs of PSC. Working with Drew Rothrock, he developed the concept of the thickness distribution that is at the heart of most sea ice models.

How has the loss of sea-ice and other effects of climate change impact Inuit communities that rely on polar bears for nutritional, economic, and cultural subsistence? Frontiers in Marine Science, the open-access journal, has published a report where Kristin Laidre and her colleagues examined Traditional Ecological Knowledge (TEK) survey results collected from subsistence polar bear hunters living in East Greenland.

UW Today talks to Cecilia Peralta Ferriz about her experiences in Norway, as a U.S. Fulbright Scholar, before she returns to Seattle at the end of May.

PSC’s Jamie Morison and Ben Smith are interviewed by KING 5 news about NASA’s latest space laser, Ice, Cloud and land Elevation Satellite-2 (ICESat-2), which launches 15 September. ICESat-2 helps monitor glaciers, sea ice and ice sheets via NASA satellite technology. Watch the interview to learn more.

Valenzuela, Jacob J., López García de Lomana, Adrián, Lee, Allison, Armbrust, E. V., Orellana, Mónica V., Baliga, Nitin S., 2018. Ocean acidification conditions increase resilience of marine diatoms. Nature Communications, 9,  2328.

The Arctic passageways have experienced increased commercial traffic due to less sea ice for longer durations. In a study published in the Proceedings of the National Academy of Sciences, recent PSC postdoc Donna Hauser and co-authors, Kristin Laidre and Harry Stern, show the vulnerability of 80 subpopulations of seven endemic Arctic marine mammal species to vessel traffic across the Northwest Passage and Northern Sea Route during the open-water season. 

PSC’s Ian Joughin and Stefanie Mack, along with Ben Hills, attended the workshop, Rising Coastal Seas on a Warming Earth, at New York University Abu Dhabi Institute to devise ways to understanding how ice sheets and oceans interact at the West Antarctic Ice Sheet. UAE’s news source The National reported on the workshop and spoke with a few of the attendees, including Ben.

Stabeno, P., Kachel, N., Ladd, C., & Woodgate, R., 2018. Flow patterns in the eastern Chukchi Sea: 2010–2015. Journal of Geophysical Research: Oceans, 123, 1177–1195.

Zhang, J., A. Schweiger, M. Webster, B. Light, M. Steele, C. Ashjian, R. Campbell, and Y. Spitz, Melt pond conditions on declining Arctic sea ice over 1979-2016: Model development, validation, and results, J. Geophys. Res. Oceans, 123,, 2018.