A new University of Washington-led study found that polar bears that recently denned had higher average blood sugar levels over the previous months than those that had not. When combined with the absence of cubs, the lack of denning may point to reproductive failure and help researchers better asses bear populations and guide conservation efforts
Author Archive
Atkinson, S.N., K.L. Laidre, T.W. Arnold, S. Stapleton, E.V. Regehr, E.W. Born, Ø. Wiig, M. Dyck, N.J. Lunn, H.L. Stern, and D. Paetkau, 2021. A novel mark-recapture-recovery survey using genetic sampling for polar bears Ursus maritimus in Baffin Bay, Endangered Species Research, 46, 105–120, https://doi.org/10.3354/esr01148
Badgeley, J., Pettit, E., Carr, C., et al. (2017). An englacial hydrologic system of brine within a cold glacier: Blood Falls, McMurdo Dry Valleys, Antarctica. Journal of Glaciology, 63(239), doi: 10.1017/jog.2017.16
Badgeley, J. A., Steig, E. J., Hakim, G. J., et al. (2020). Greenland temperature and precipitation over the last 20,000 years using data assimilation. Climate of the Past, 16(4), 1325–1346, doi:10.5194/cp-16-1325-2020
Badgeley, J. A., Fudge T. J., Koffman, B., Rupper, S. (2022) Editorial: Early-career perspectives on ice-core science. Past Global Changes Magazine, 30(2), 97, doi:10.22498/pages.30.2.97
Badgeley, J. A., Steig E. J., Dütsch, M. (2022) Uncertainty in reconstructing Antarctic Ice Sheet elevation from temperature-sensitive ice core records. Geophysical Research Letters, 49(23), doi:10.1029/2022GL100334
Badgeley, J. A., Morlighem, M., Seroussi, H. (2025). Increased sea level contribution from northwestern Greenland for models that reproduce observations. Proc. Natl. Acad. Sci. U.S.A. 122 (25) e2411904122, https://doi.org/10.1073/pnas.2411904122
Briner, J. P., Cuzzone, J. K., Badgeley, J. A., et al. (2020). Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century. Nature, 586, 70–74, doi:10.1038/s41586-020-2742-6
Bushuk, M., S. Ali, D. A. Bailey, Q. Bao, L. Batt, U. S. Bhatt, E. Blanchard-Wrigglesworth, E. Blockley, G. Cawley, J. Chi, F. Counillonno, P. G. Coulombe, R. I. Cullather, F. X. Diebold, A. Dirkson, E. Exarchou, M. Gobel, W. Gregory, V. Guemas, L. Hamilton, B. He, S. Horvath, M. Ionita, J. E. Kay, E. Kim, N. Kimura, D. Kondrashov, Z. M. Labe, W. Lee, Y. J. Lee, C. Li, X. Li, Y. Lin, Y. Liu, W. Maslowski, F. Massonnet, W. N. Meier, W. J. Merryfield, H. Myint, J. C. Acosta Navarro, A. Petty, F. Qiao, D. Schroder, A. Schweiger,…
Dierking, W., Stern, H. L., and Hutchings, J. K., 2020. Estimating statistical errors in retrievals of ice velocity and deformation parameters from satellite images and buoy arrays, The Cryosphere, 14, 2999–3016, https://doi.org/10.5194/tc-14-2999-2020.
Drushka, K., Westbrook, E., Bingham, F. M., Gaube, P., Dickinson, S., Fournier, S., Menezes, V., Misra, S., Pérez Valentín, J., Rainville, E. J., Schanze, J. J., Schmidgall, C., Shcherbina, A., Steele, M., Thomson, J., and Zippel, S.: Salinity and Stratification at the Sea Ice Edge (SASSIE): an oceanographic field campaign in the Beaufort Sea, Earth Syst. Sci. Data, 16, 4209–4242, https://doi.org/10.5194/essd-16-4209-2024, 2024.
Dunham, K.D., M.G. Dyck, J.V. Ware, A.E. Derocher, E.V. Regehr, H.L. Stern, G.B. Stenson, D.N. Koons (2024). A demographic survey of the Davis Strait polar bear subpopulation using physical and genetic capture-recapture-recovery sampling. Marine Mammal Science, 40(3), e13107. https://doi.org/10.1111/mms.13107
Ewert, M., Nunn, B. L., Firth, E., & Junge, K. (2025). Metabolic Responses, Cell Recoverability, and Protein Signatures of Three Extremophiles: Sustained Life During Long-Term Subzero Incubations. Microorganisms, 13(2), 251. https://doi.org/10.3390/microorganisms13020251
Forcucci, D., I. Rigor, W. Ermold, and H. Stern. 2022. Float Your Boat: Launching students into the Arctic Ocean. Oceanography, https://doi.org/10.5670/oceanog.2022.102.
Gentilhomme, A. S., Dhakar, K., Timmins-Schiffman, E., Chaw, M., Firth, E., Junge, K., & Nunn, B. L. (2025). Proteomic Insights into Psychrophile Growth in Perchlorate-Amended Subzero Conditions: Implications for Martian Life Detection. Astrobiology. https://doi.org/10.1089/ast.2024.0065
Heide-Jørgensen, M.P., M.L. Burt, R.G. Hansen, N.H. Nielsen, M. Rasmussen, S. Fossette, and H. Stern, 2012, The Significance of the North Water Polynya to Arctic Top Predators, AMBIO, doi: 10.1007/s13280-012-0357-3.
The Saturnian moon Enceladus is a particularly promising target in the search for extraterrestrial life detection, given its large liquid ocean. While direct sample retrieval from this ocean is made difficult by the kilometers-thick ice shell surrounding it, Enceladus is host to prominent geysers that deliver the contents of this ocean to the surface (featured in this image taken during a Cassini flyby). This is a boon to life detection missions, but any life or biosignatures present in this ejecta would be exposed to the stressors of aerosolization, average surface temperatures nearing -200C, prolonged exposure to near-vacuum conditions, and UV…
Kamal, F, HL Stern, D Johns, Z Strickland, 2022. Engaging Students and the Public in Polar Research through Live Interactive Planetarium Shows, AGU Fall Meeting Abstracts 2022, ED52A-05
Khuller, A.R., Christensen, P.R., Harrison, T.N., Diniega S., (2021). The Distribution of Frosts on Mars: Links to Present-Day Gully Activity. Journal of Geophysical Research: Planets.
Khuller, A.R. and Christensen, P.R., (2021). Evidence of Exposed Dusty Water Ice within Martian Gullies. Journal of Geophysical Research: Planets (Cover page).
Khuller, A.R. and Plaut, J.J. (2021). Characteristics of the Basal Interface of the Martian South Polar Layered Deposits. Geophysical Research Letters.
Khuller, A.R., Alavi, O., Mayer, J., Lanes, T., Needham, P., Rajagopalan, S.S., Curiel, A., Bonelli, D., Thompson, E., Miller, R., Grayson, M., Sandys, N., White, D.B., Mikellides, P.G., (2018). Pulsed Plasma Thruster for Multi-Axis CubeSat Attitude Control Applications. 54th AIAA Joint Propulsion Conference and Exhibit.
Khuller, A.R. and Clow, G.D., (2024). Turbulent Fluxes and Evaporation/Sublimation Rates on Earth, Mars, Titan, and Exoplanets. Journal of Geophysical Research: Planets.
Khuller, A.R., Christensen, P.R., S.G. Warren, (2021). Spectral Albedo of Dusty Martian H2O Snow and Ice. Journal of Geophysical Research: Planets.
Khuller, A.R., Kerber, L., Schwamb, M.E., Beer, S., Nogal, F., Perry, R., Hood, W., Aye, K.-M., Portyankina, G., Hansen, C.J., (2021). Irregular Polygonal Ridge Networks in Arabia Terra, Nili Fossae and Nilosyrtis. Icarus.
Khuller, A.R., Warren, S.G., Christensen, P.R., Clow, G.D. (2024). Potential for Photosynthesis on Mars within Snow and Ice. Nature Communications Earth & Environment. (Editor’s highlight).
Laidre, K.L., E.W. Born, P. Heagerty, Ø. Wiig, H. Stern, R. Dietz, J. Aars, and M. Andersen, 2015, Shifts in female polar bear (Ursus maritimus) habitat use in East Greenland, Polar Biology, DOI 10.1007/s00300-015-1648-5.
Laidre K. L., M. A. Supple, E. W. Born, E. V. Regehr, Ø. Wiig, F. Ugarte, J. Aars, R. Dietz, C. Sonne, P. Hegelund, C. Isaksen, G. B. Akse, B. Cohen, H. L. Stern, T. Moon, C. Vollmers, R. Corbett-Detig, D. Paetkau, and B. Shapiro. 2022. Glacial ice supports a distinct and undocumented polar bear subpopulation persisting in late 21st-century sea-ice conditions. Science 376 (6599): 1333-1338. DOI: 10.1126/science.abk2793
Laidre, K.L., Todd W. Arnold, Eric V. Regehr, Stephen N. Atkinson, Erik W. Born, Øystein Wiig, Nicholas J. Lunn, Markus Dyck, Harry L. Stern, Seth Stapleton, Benjamin Cohen, David Paetkau. 2023. Demographic response of a high-Arctic polar bear (Ursus maritimus) subpopulation to changes in sea ice and subsistence harvest, Endangered Species Research, Vol. 51: 73–87, https://doi.org/10.3354/esr01239
Laidre, Kristin L., Marie J. Zahn, Malene Simon, Michael Ladegaard, Kathleen M. Stafford, Elizabeth Phillips, Twila Moon, Harry L. Stern, and Benjamin Cohen (2024). Narwhal (Monodon monoceros) associations with Greenland summer meltwater release. Ecosphere 15(10): e70024. https://doi.org/10.1002/ecs2.70024
Laidre, K., E.W. Born, E. Gurarie, Ø. Wiig, R. Dietz, and H. Stern, 2012, Females roam while males patrol: Divergence in breeding season movements of pack-ice polar bears (Ursus maritimus), Proceedings of the Royal Society B, 280:20122371. https://doi.org/10.1098/rspb.2012.2371
Laidre, K.L., S. Atkinson, E.V. Regehr, H.L. Stern, E.W. Born, Ø. Wiig, N.J. Lunn, M. Dyck, 2020. Interrelated ecological impacts of climate change on an apex predator. Ecological Applications, 30(4), e02071, https://doi.org/10.1002/EAP.2071
Landis M., Acharya, P.J., Alsaeed, N.R., Andres C., Becerra P., Calvin, W.M., Cangi, E.M., Cartwright, S.F.A.; Chaffin, M.S.; Diniega, S., Dundas, C. M., Hansen, C.J., Hayne, P.O., Herkenhoff, K.E., Kass, D.M., Khuller, A.R., McKeown, L., Russell, P.S., Smith, I.B., Sutton, S.S., Widmer, J.M., Whitten, J.L., (2023). Polar Science Results from Mars Reconnaissance Orbiter: Multiwavelength, multiyear insights. Icarus.
Moon, T.A., B. Cohen, T.E. Black, K.L. Laidre, H.L. Stern, and I. Joughin (2024). Characterizing southeast Greenland fjord surface ice and freshwater flux to support biological applications, The Cryosphere, 18, 4845–4872, https://doi.org/10.5194/tc-18-4845-2024
Onarheim, I. H., Årthun, M., Teigen, S. H., Eik, K. J., & Steele, M., Recent thickening of the Barents Sea ice cover. Geophysical Research Letters, 51, e2024GL108225. https://doi.org/10.1029/2024GL108225, 2024.
Osterberg, E., Badgeley, J. A., Buizert, C., et al. (2020). IDP Ice Core Working Group (IDP-ICWG): Ice Core Research Priorities in Greenland. White Paper.
Perovich, D.K., and 22 others including H. Stern, 1999, Year on Ice Gives Climate Insights, Eos, Transactions, American Geophysical Union, vol. 80, no. 41, October 12, pages 481,485-486.
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Regehr, E.V., K.L. Laidre, T.C. Atwood, H.L. Stern, and B. Cohen (2024). Sea-ice Conditions Predict Polar Bear Land Use around Military Installations in Alaska, Human-Wildlife Interactions, 17(1):21-36, https://doi.org/10.26077/39a8-fb75
Schweiger, A., H. Stern, M. Stark, J. Zhang, P. Hwang, and M. Steele (2013), Quantifying the Floe Size Distribution in the Marginal Ice Zone from Satellite Imagery for use in Model Development and Validation, Abstract OS11B-1656, presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec.
Shapero, D., Badgeley, J. A., Hoffman, A., Joughin, I. (2021). icepack: a new glacier flow modeling package in Python, version 1.0. Geoscientific Model Development, 14(7), 4593–4616, doi:10.5194/gmd-14-4593-2021
Stern, H., 2013, Polar Science Weekend at Pacific Science Center: Eight Years of Outreach and Partnership, Witness the Arctic, vol. 17, #2, pp 37-39, published by the Arctic Research Consortium of the United States (ARCUS), http://www.arcus.org/witness-the-arctic/2013/2/article/19955
Stern, H., 2015, Sea Ice in the Western Portal of the Northwest Passage from 1778 to the 21st Century, in Arctic Ambitions: Captain Cook and the Northwest Passage, University of Washington Press.
Stern, H., 2015, Arctic Ambitions: Captain Cook and the Northwest Passage, Witness the Arctic, Spring 2015 issue #2, published by the Arctic Research Consortium of the United States (ARCUS), http://www.arcus.org/witness-the-arctic/2015/2/article/23159
Stern, H., 2017, Where is the “Annexed Drawing” of 1778? Cook’s Log, vol. 40, no. 2, pp 16-17.