Posts Tagged «2018»

The 2018 Ocean Sciences Meeting (OSM), co-sponsored by the American Geophysical Union (AGU), the Association for the Sciences of Limnology and Oceanography (ASLO), and The Oceanography Society (TOS), will be held 11–16 February, in Portland, Oregon. Some of the members of PSC will join their colleagues from the University of Washington and other institutions to present and discuss their latest marine science research endeavors.

UW News talks to PSC’s Laura Kehrl about a recently published study identifying a locale in #Antarctica that may provide a continuous ice core record of the last 1 million yrs. The research team, which included members from UW and UMaine, used ice‐penetrating radar and an ice flow model to map the promising region. Kehrl is the corresponding author for the study published in AGU’s Geophysical Research Letters. Read on to learn how the team conducted their fieldwork…

PSC members join their colleagues and peers at the AGU Fall Meeting 2018 in Washington DC. 

Kristin Laidre presented the fourth seminar in the APL-UW 75th Anniversary series, “The Polar Science Center From Ice Dynamics to Polar Bears.” 

Armitage, T. W. K., R. Kwok, A. Thompson, G. Cunningham (2018), Dynamic topography and sea level anomalies of the Southern Ocean: Variability and teleconnections, J. Geophys. Res. Oceans, 123,

PSC’s Kristin Laidre lends her expertise to a CBC News story of a juvenile narwhal adopted by a pod of Beluga whales in the St. Lawrence River.

Bi, H., J. Zhang, Y. Wang, Z. Zhang, Y. Zhang, M. Fu, H. Huang, and X. Xu, Arctic Sea Ice Volume Changes in Terms of Age as Revealed From Satellite Observations, IEEE Geoscience & Remote Sensing Society, DOI: 10.1109/JSTARS.2018.2823735, 2018.

Braund, S. R., P. B. Lawrence, E. G. Sears, R. K. Schraer, E. V. Regehr, B. Adams, R. T. Hepa, J. C. George, and A. L. V. Duyke. 2018. Polar Bear TEK: A Pilot Study to Inform Polar Bear Management Models. North Slope Borough Department of Wildlife Management, Research Report NSB.DWM.RR.2018-01. Utqiaġvik, Alaska USA.

Chambault, P., C. Moesgaard Albertsen, T. A. Patterson, R. G. Hansen, O. Tervo, K. L. Laidre & M. P. Heide-Jørgensen. 2018. Sea surface temperature predicts the movements of an Arctic cetacean: the bowhead whale. Scientific Reports 8:9658. doi:10.1038/s41598-018-27966

Third Pod from the Sun, the American Geophysical Union’s podcast, kicks off the month of March with PSC’s Kristin Laidre.

E. Ciracì, I. Velicogna and T. C. Sutterley. Mass Balance of Novaya Zemlya Archipelago, Russian High Arctic, Using Time-Variable Gravity from GRACE and Altimetry Data from ICESat and CryoSat-2. Remote Sensing, 10(11): 1817, 2018.

The Arctic Data Center, supported by NSF, has highlighted Karen Junge’s work investigating rotten ice. Data has been collected on both the physical and biological properties of rotten ice and is available from the center.  

Dewey, S., Morison, J., Kwok, R., Dickinson, S., Morison, D. & Andersen, R., 2018. Arctic ice-ocean coupling and gyre equilibration observed with remote sensing. Geophysical Research Letters, 45.

Ding, Q., Schweiger, A., L’Heureux, M., Steig, E. J., Battisti, D. S., Johnson, N. C., Blanchard-Wrigglesworth, E., Po-Chedley, S., Zhang, Q., Harnos, K., Bushuk, M., Markle, B., and Baxter, I. (2018), Fingerprints of internal drivers of Arctic sea ice loss in observations and model simulations. Nature Geoscience.

Durner, G. M., Laidre, K. L., and York, G .S., eds. 2018. Polar Bears: Proceedings of the 18th Working Meeting of the IUCN/SSC Polar Bear Specialist Group, 7–11 June 2016, Anchorage, Alaska. Gland, Switzerland and Cambridge, UK: IUCN. xxx + 207pp.

What is traditional knowledge and how can it help us understand climate change? Online news source, Earther, talks to Kristin Laidre about her recently published research involving some of the Inuit communities of East Greenland. Inuit sustenance hunters were interviewed about their livelihood, the landscape of their homeland, and more to form a picture of how things have changed over time. 

Eicken, H., A. Mahoney, J. Jones, T. Heinrichs, D. Broderson, H. Statscewich, T. Weingartner, M. Stuefer, T. Ravens, M. Ivey, A. Merten, and J. Zhang, Sustained observations of changing Arctic coastal and marine environments and their potential contribution to Arctic maritime domain awareness: A case study in northern Alaska, Arctic, 71, 1-15.,, 2018.

Escajeda, E., Laidre, K. L., Born, E. W., Wiig, Ø., Atkinson, S., Dyck, M., Ferguson, S. H., Lunn, N. J. (2018) Identifying shifts in maternity den phenology and habitat characteristics of polar bears (Ursus maritimus) in Baffin Bay and Kane Basin. Polar Biology DOI: 10.1007/s00300-017-2172-6

UW News covers PSC’s Eric Regehr’s polar bear study of the Chukchi Sea subpopulation. This is the first formal study of this population and is published in the open-access journal Scientific Reports. Read on to learn more about the lead author’s decade-long project and the status of the Chukchi Sea polar bears.

Frantz, C. M., Light, B., Farley, S. M., Carpenter, S., Lieblappen, R., Courville, Z., Orellana, M. V., and Junge, K.: Physical and optical characteristics of heavily melted “rotten” Arctic sea ice, The Cryosphere, 13, 775-793,, 2019. 

Hakai Magazine covered a recent paper led by PSC’s Kristin Laidre and asked about the collaborative project in which Kristin, the research team, and interpreters interviewed Inuit hunters and gathered traditional knowledge on polar bear ecology in East Greenland. Read the article to find out how the subsistence and cultural relationships have changed for the arctic animals & Indigenous communities. 

Hauser, D. D. W., K. L. Laidre, H. L. Stern. 2018. Vulnerability of Arctic marine mammals to vessel traffic in the increasingly ice-free Northwest Passage and Northern Sea Route. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.1803543115

Hauser DDW, Laidre KL, Stern HL, Suydam RS, Richard PR. Indirect effects of sea ice loss on summer‐fall habitat and behaviour for sympatric populations of an Arctic marine predator. Divers Distrib. 2018;24:791–799.

Hauser, D.D.W., K.L. Laidre, H.L. Stern, R.S. Suydam, P.R. Richard. 2018. Indirect effects of sea ice loss on summer-fall habitat and behaviour for sympatric populations of an Arctic marine predator. Diversity and Distributions

The Verge, a news website for the mainstream, interviewed PSC’s Ignatius Rigor and other researchers to find out how vanishing sea ice in the Arctic impacts the general public.

Hill, V. J., Light, B., Steele, M., & Zimmerman, R. C. (2018). Light availability and phytoplankton growth beneath Arctic sea ice: Integrating observations and modeling. Journal of Geophysical Research: Oceans, 123.

Scavenging on stranded large whale carcasses may have aided polar bear survival through past interglacial periods, during which sea‐ice was limited and access to seals was reduced. Will whales play a similar role in the future as Arctic conditions change? To learn more, read the recent study led by PSC’s Kristin Laidre in the journal Frontiers in Ecology and the Environment.

The Applied Physics Laboratory-UW interviews PSC’s Jamie Morison and Ben Smith about ICESat-2, their roles in the NASA project and how it will improve research efforts and data. Watch the video here or on APL’s YouTube channel.

Erica Escajeda and Kristin Laidre were part of an international team of researchers that studied polar bear maternity dens and compared current data with previously published data through the 1990s. Read the findings published in Polar Biology.

IMBIE [includes B. Smith & I. Joughin]. 2018. Mass balance of the Antarctic Ice Sheet from 1992 to 2017. Nature. 558:219–222.

Interferometric synthetic aperture radar (InSAR) is a widely used tool for measuring ice sheet velocity in the Polar Regions. However, the ionosphere is a prevalent source of noise in these data. Ian Joughin is a co-author of a study, published in the May 2018 issue of Remote Sensing Environment, where a split-spectrum technique was utilized, and its performance analyzed, for correcting ionospheric effects in InSAR-based ice velocity measurements in Greenland and Antarctica. Read on to learn if the technique effectively reduced noise level…

Koch, A., Rosing-Asvid, A., Rajala, E.L., Born, E.W., Bonefeld-Jørgensen, E., Mulvad, G., Laidre, K., Tryland, M., Magnusson, U., Sonne, C., Jenssen, B.M., Andersen-Ranberg, E., Eulaers, I., Desforges, J., Mosbacher, J.B., Gustavson, K., Schmidt, N., Dietz, R., Siebert, U., Grøndahl, C., Agerholm, J.S., Wiig, Ø., Prevalence of antibodies against Brucella spp. in West Greenland polar bears (Ursus maritimus) and East Greenland muskoxen (Ovibos moschatus), Polar Biol (2018).

Kvile, K., C. Ashjian, Z. Feng, J. Zhang, and R. Ji, Pushing the limit: Resilience of an Arctic copepod to environmental fluctuations. Glob Change Biol. 2018; 24:5426-5439.

Kwok, R. (2018), Arctic sea ice thickness, volume, and multiyear ice coverage: Losses and coupled variability (1958 – 2018). Environ. Res. Lett. 13 (2018) 105005

Kwok, R. and S. Kacimi (2018), Three years of sea ice freeboard, snow depth, and ice thickness of the Weddell Sea from Operation IceBridge and CryoSat-2, The Cryosphere, 12, 2789–2801.

Kwok, R., G. F. Cunningham, and T. W. K. Armitage (2018), Relationship between specular returns in CryoSat-2 data, surface albedo and summer minimum ice extent, Elem Sci Anth, 6(1):53, doi:

Laidre K. L.,  H. Stern, E. W. Born, P. Heagerty, S, Atkinson, Ø. Wiig, N. J. Lunn, E. V. Regehr, R. McGovern, M. Dyck. 2018.  Changes in winter and spring resource selection by polar bears Ursus maritimus in Baffin Bay over two decades of sea-ice loss. Endangered Species Research 36:1-14.

Laidre K. L., E. W. Born, S. N. Atkinson, Ø. Wiig, L. W. Andersen, N. J. Lunn, M. Dyck, E. V. Regehr, R. McGovern and P. Heagerty. 2018.  Range contraction and increasing isolation of a polar bear subpopulation in an era of sea ice loss. Ecology and Evolution DOI: 10.1002/ece3.3809

Laidre, K. L., Stirling, I. , Estes, J. A., Kochnev, A. and Roberts, J. (2018), Historical and potential future importance of large whales as food for polar bears. Front Ecol Environ.

Laidre, K. L. and E. V. Regehr. 2018. Arctic marine mammals. In “Encyclopedia of Marine Mammals” (Bernd Würsig, J.G.M. Thewissen, and Kit M. Kovacs, eds.), 3rd edition. Pp 34-40. Academic Press/Elsevier, San Diego, CA, USA.

Laidre, K.L., A.D. Northey, F. Ugarte, (2018). Traditional Knowledge About Polar Bears (Ursus maritimus) in East Greenland: Changes in the Catch and Climate Over Two Decades. Frontiers in Marine Science, 5,

Lander, M., A. J. Westgate, B. C. Balmer, J. P. Reid, M. J. Murray, and K. L. Laidre. 2018. “Tagging and Tracking”, Chapter 32 in CRC Handbook of Marine Mammal Medicine, 3rd Edition. F. M. D. Gulland, L. A. Dierauf, K. L. Whitman (Eds), pages 767-798.

Lemos, A., Shepherd, A., McMillan, M., Hogg, A. E., Hatton, E., and Joughin, I.: Ice velocity of Jakobshavn Isbræ, Petermann Glacier, Nioghalvfjerdsfjorden, and Zachariæ Isstrøm, 2015–2017, from Sentinel 1-a/b SAR imagery, The Cryosphere, 12, 2087-2097,, 2018.

Liao, H., F. J. Meyer, B. Scheuchl, J. Mouginot, I. Joughin, E. Rignot. 2018. Ionospheric correction of InSAR data for accurate ice velocity measurement at polar regions, Remote Sensing of Environment, 209: 166-180,

Mayot, N., Matrai, P., Ellingsen, I. H., Steele, M., Johnson, K., Riser, S. C., & Swift, D. (2018). Assessing phytoplankton activities in the seasonal ice zone of the Greenland Sea over an annual cycle. Journal of Geophysical Research: Oceans, 123, 8004–8025.

Moore, G. W. K., Schweiger, A., Zhang, J., & Steele, M. (2018). Collapse of the 2017 winter Beaufort High: A response to thinning sea ice? Geophysical Research Letters, 45, 2860–2869.

Moore, G.W.K., A. Schweiger, J. Zhang, and M. Steele, What caused the remarkable February 2018 North Greenland Polynya? Geophys. Res. Lett., 45,, 2018.

Atlas Obscura covers a recent study led by former PSC postdoc Donna Hauser, along with Kristin Laidre and Harry Stern. The travel source shares how increased ship traffic in the Arctic increases the vulnerability of many marine mammals, especially the narwhal.

Otwell, A. E., López García de Lomana, A., Gibbons, S. M., Orellana, M. V. and Baliga, N. S. (2018), Systems biology approaches towards predictive microbial ecology. Environ Microbiol. doi:10.1111/1462-2920.14378.