Published in Journal of Glaciology, 2024
A need for more representative, co-produced glaciology
Recommended citation: Robel, A. A., Ultee, L., Ranganathan, M., and Nash, M. (2024). "For whom and by whom is glaciology?." Journal of Glaciology. doi:10.1017/jog.2024.29. https://www.cambridge.org/core/journals/journal-of-glaciology/article/for-whom-and-by-whom-is-glaciology/99E59E08B948C2A1B3B83702B30D39A6
Published in Geoscientific Model Development, 2024
Developing a stochastic ice sheet mass-balance scheme
Recommended citation: Ultee, L., Robel, A. A., and Castruccio, S. (2024). "A stochastic parameterization of ice sheet surface mass balance for the Stochastic Ice-Sheet and Sea-Level System Model (StISSM v1.0)." Geoscientific Model Development 17, 1041-1057. doi:10.5194/gmd-17-1041-2024. https://gmd.copernicus.org/articles/17/1041/2024/
Published in Journal of Glaciology, 2023
Excluding frontal ablation can skew future projections of glacier change
Recommended citation: Malles, J.-H. et al. (2023). "Exploring the impact of a frontal ablation parameterization on projected 21st-century mass change for Northern Hemisphere glaciers." Journal of Glaciology 69(277), pp. 1317–1332. doi:10.1017/jog.2023.19. https://www.cambridge.org/core/journals/journal-of-glaciology/article/exploring-the-impact-of-a-frontal-ablation-parameterization-on-projected-21stcentury-mass-change-for-northern-hemisphere-glaciers/1ABFB1057B58B2CC42B0FEE33F346C3F
Published in Geoscientific Model Development, 2022
Adding stochastic forcing options to ISSM to facilitate large-ensemble simulations
Recommended citation: Verjans, V., Robel, A., Seroussi, H., Ultee, L., and Thompson, A. (2022). "The Stochastic Ice-Sheet and Sea-Level System Model v1.0 (StISSM v1.0)." Geoscientific Model Development https://gmd.copernicus.org/articles/15/8269/2022/
Published in Nature Communications, 2022
What is forcing observed velocity changes at Helheim Glacier - atmosphere or ocean? It depends on the time scale.
Recommended citation: Ultee, L., Felikson, D., Minchew, B., Stearns, L.A., and Riel, B. (2022). "Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales." Nature Communications. https://doi.org/10.1038/s41467-022-33292-y http://ehultee.github.io/files/Ultee_et_al-2022-Nature_Communications.pdf
Published in Earth System Dynamics, 2022
To what extent can we expect that retreating glaciers will continue to moderate droughts around the world?
Recommended citation: Ultee, L., Coats, S., and Mackay, J. (2022). "Glacial runoff buffers droughts through the 21st century." Earth System Dynamics 13: 935-959. https://doi.org/10.5194/esd-13-935-2022 http://ehultee.github.io/files/gSPEI-esd-13-935-2022.pdf
Published in Geophysical Research Letters, 2020
How does our theoretical speed limit on glacier retreat hold up in Greenland?
Recommended citation: Ultee, L. and Bassis, J. N. (2020). "SERMeQ model produces a realistic upper bound on calving retreat for 155 Greenland outlet glaciers." Geophysical Research Letters 47(21): e2020GL090213. doi:10.1029/2020GL090213 http://ehultee.github.io/files/2020GL090213.pdf
Published in Journal of Glaciology, 2020
How much stress can glacier ice sustain before breaking?
Recommended citation: Ultee, L., Meyer, C. R. and Minchew, B. M. (2020). "Tensile strength of glacial ice deduced from observations of the 2015 eastern Skaftá cauldron collapse, Vatnajökull ice cap, Iceland." Journal of Glaciology FirstView. doi:10.1017/jog.2020.65 http://ehultee.github.io/files/jog-2020_65.pdf
Published in Journal of Geophysical Research: Earth Surface, 2019
Is there a fastest possible glacier retreat by calving?
Recommended citation: Bassis, J. N. and Ultee, L. (2019). "A thin film viscoplastic theory for calving glaciers:toward a bound on the calving rate of glaciers." Journal of Geophysical Research: Earth Surface 124. doi:10.1029/2019JF005160 http://ehultee.github.io/files/BassisUltee-thin_film_viscoplastic-2019.pdf
Published in Earth's Future, 2018
Commentary on avenues to productive public engagement for climate researchers. A collaboration with scholars of science usability.
Recommended citation: Ultee, L., Arnott, J. C., Bassis, J. N., and Lemos, M. C. (2018). "From ice sheets to main streets: Intermediaries connect climate scientists to coastal adaptation." Earth's Future 6(3): 299-304. doi:10.1002/2018EF000827 http://ehultee.github.io/files/2018EF000827.pdf
Published in Case Studies in the Environment, 2018
Summary of a multimedia case study I co-authored for use in environmental studies courses. The corresponding case won an award for meaningful community impact, and is available for instructors at teachmsc.org.
Recommended citation: Boone, L., Ultee, L., Waisanen, E., Newell, J., Thorne, J.A. and Hardin, R. (2018). "Collaborative creation and implementation of a Michigan Sustainability Case on urban farming in Detroit." Case Studies in the Environment 2(1): 8-13. doi: 10.1525/cse.2017.000703 http://ehultee.github.io/files/cse-2017_000703_full.pdf
Published in Frontiers in Earth Science, 2017
Description and validation of my model's applicability to interacting glacier tributary networks.
Recommended citation: Ultee, L. and Bassis, J.N. (2017). "A plastic network approach to model calving glacier advance and retreat." Frontiers in Earth Sciences. 5(24). doi: 10.3389/feart.2017.00024 http://ehultee.github.io/files/feart-2017_00024.pdf
Published in Journal of Glaciology, 2016
Foundational description of the idea behind the numerical model I developed for mass loss from calving glaciers.
Recommended citation: Ultee, L. and Bassis, J. N. (2016). "The future is Nye: an extension of the perfect plastic approximation to tidewater glaciers." Journal of Glaciology. 62(236): 1143-1152. doi: 10.1017/jog.2016.108 http://ehultee.github.io/files/jog-2016_108.pdf