Trevor R. Hillebrand Postdoctoral Research Associate Fluid Dynamics and Solid Mechanics Group Los Alamos National Laboratory [email protected] https://trevorhillebrand.wixsite.com/home https://orcid.org/0000-0003-3535-1540 Research Interests I investigate the past, present, and future of Earth’s ice sheets using data-constrained numerical models of ice flow with the goal of improving estimates of future sea-level rise. As a postdoctoral researcher at Los Alamos National Laboratory, I investigate future sea-level rise from mass loss of the Greenland Ice Sheet using the finite-element MALI ice sheet model run on high-performance computing platforms. I collect geophysical and geological data through fieldwork and remote sensing campaigns in Antarctica and other glaciated regions, and I incorporate these measurements into numerical models in order to better understand ice-sheet sensitivity to climate. Education June 2019 Ph.D. Earth and Space University of Washington Sciences Advisor: Dr. John Stone Dissertation: Quaternary grounding-line fluctuations in Antarctica March 2018 M.Sc. Applied University of Washington Mathematics June 2016 Ph.C. Earth and Space University of Washington Sciences Dec. 2012 B.A. Geology (High University of California Honors), Music Berkeley Advisors: Dr. Kurt Cuffey & Honors Thesis: A comparison of tectonics of the eastern Sierra Nevada, Dr. David Shuster CA in the vicinity of Mt. Whitney and Lee Vining, using (U-Th)/He and 4He/3He thermochronometry: Preliminary results and thermal modeling Professional Positions Colorado College Oct. – Nov. 2020 One-block Visiting Assistant Professor Los Alamos National Laboratory Oct. 2019 – present Postdoctoral Research Associate University of Washington 2013 – 2019 Graduate Research/Teaching Asst. University of Washington June – Sept. 2013 Lab Assistant Berkeley Geochronology Center Sept. – Dec. 2012 Undergraduate Research Assistant United States Forest Service May – Aug. 2012 Physical Science Technician Berkeley Geochronology Center May – Aug. 2011 Undergraduate Research Assistant UCSB Institute for Crustal Studies May – Aug. 2010 Undergraduate Research Assistant Research Grants and Fellowships Los Alamos National Laboratory Institutional Computing Program: Reducing uncertainties in 21st century sea-level rise through improved modeling of the ice sheet basal interface. 2020 (3 million core- hours on LANL supercomputers) National Science Foundation Earth Sciences Postdoctoral Fellowship: Did multiple scales of erosion beneath the Laurentide Ice Sheet control Pleistocene glacial cycles? 2019 ($174,000; offer declined) West Antarctic Ice Sheet Workshop travel grant to attend conference in San Diego, CA. 2019 ($825) University of Washington Quaternary Research Center Award: Constraining past Antarctic Ice Sheet thickness using cosmogenic 14C in bedrock. 2017 ($6,750) Scientific Committee on Antarctic Research travel grant to attend Past Antarctic Ice Sheet conference in Trieste, Italy. 2017 ($1,210) University of Washington Earth and Space Sciences Inquisitive Graduate Student Support Fund Fellowship & Jody Bourgeois Graduate Student Support Fund Fellowship: Holocene deglaciation of the Ross Sea, Antarctica. 2015 ($2,500) University of Washington Earth and Space Sciences Peter Misch Fellowship: Surface evolution of Khumbu Glacier: quantifying the effects of climate change at the Himalayan crest. 2014 ($800) University of California Berkeley Charles Ramsden Undergraduate Research Fellowship: Tectonic evolution of the eastern Sierra Nevada, California. 2012 ($2,400) Awards and Honors UC Berkeley High Honors in Geology, Dec. 2012 UC Berkeley Distinction in General Scholarship, Dec. 2012 UC Berkeley Dean’s Honors List, Dec. 2012 Peer Reviewed Publications and Accepted Manuscripts Hillebrand, TR, H Conway, C Martín, J Paden, MR Koutnik, JP Winberry (2021). Radio-echo sounding and waveform modeling reveals abundant marine ice in former rifts and basal crevasses within Crary Ice Rise, Antarctica. Journal of Glaciology. doi:10.1017/jog.2021.17 Spector, P, JO Stone, G Balco, TR Hillebrand, M Thompson, T Black (2020). Miocene to Pleistocene glacial history of West Antarctica inferred from nunatak geomorphology and cosmogenic-nuclide measurements on bedrock surfaces. American Journal of Science, 320, 637–676. King, C, B Hall, TR Hillebrand, JO Stone (2020). Delayed maximum and recession of an East Antarctic outlet glacier. Geology, 48(6), 630-634. Spector, P, JO Stone, D Pollard, TR Hillebrand, C Lewis, J Gombiner (2018). West Antarctic Sites for Subglacial Drilling to Test for Past Ice-Sheet Collapse. The Cryosphere 12(8): 2741–57. Balco, G, C Todd, K Huybers, S Campbell, M Vermeulen, M Hegland, BM Goehring, TR Hillebrand (2016). Cosmogenic-nuclide exposure ages from the Pensacola Mountains adjacent to the Foundation Ice Stream, Antarctica. American Journal of Science, 316(6), 542-577. Manuscripts In Review Hillebrand, TR, JO Stone, M Koutnik, C King, H Conway, B Hall, K Nichols, B Goehring, MK Gillespie MK (2020). Holocene thinning and grounding-line retreat of Darwin and Hatherton Glaciers, Antarctica. The Cryosphere Discussions, 1–42 (doi:https://doi.org/10.5194/tc-2020-356) Manuscripts in Preparation * Denotes undergraduate student Hillebrand, TR, MJ Hoffman, M Perego, S Price, I Howat. Manuscript in preparation. Projections of 21st century sea-level rise from Humboldt Glacier, north Greenland *Roat, A, TR Hillebrand, MJ Hoffman. Manuscript in preparation. Investigating the impacts of channelized subglacial hydrology on melt rates at the margin of Humboldt Glacier in northern Greenland Book, C, MJ Hoffman, S Kachuk, S Price, J Bassis, TR Hillebrand, M Perego. Manuscript in preparation. Sensitivity of coupled solid Earth-ice sheet modeling of Thwaites Glacier to coupling timescale and Earth rheology. Stone, JO, P Spector, J Severinghaus, TR Hillebrand, J Gombiner, D Pollard, G Balco, N Brown, J Feathers, J Talghader, K Fifield. Manuscript in preparation. Subglacial evidence for stability of the West Antarctic Ice Sheet during past warm climates Holschuh, N, TR Hillebrand, H Conway, K Christianson. Manuscript in preparation. Radiometric interpretation of sub-wavelength scatterers: Lessons from crevasse tips in radar data collected over Crary Ice Rise Martín, C, TR Hillebrand, H Conway, JP Winberry, MR Koutnik, HFJ Corr, KW Nicholls, CL Stewart, J Kingslake, A Brisbourne. Manuscript in prep. Radar polarimetry at Crary Ice Rise, Antarctica, reveals details of ice-flow reorganization over the last millennium Invited Talks Colorado College, Mathematics & Computer Science Department, Feb. 2021 CESM Paleoclimate and Land Ice Working Group Meeting, NCAR Mesa Lab, Feb. 2020 Colorado College, Geology Department, Oct. 2019. Students Mentored Abby Roat, Colorado College (Summer 2020 to present). Project Title: Investigating the impacts of channelized subglacial hydrology on melt rates at the margin of Humboldt Glacier in northern Greenland. Abby’s 10-week summer project culminated in an abstract submitted to the 2020 American Geophysical Union Fall Meeting. She is continuing this project towards a senior thesis, co-advised by myself and Dr. Christine Siddoway. Teaching Experience As visiting faculty at Colorado College Fall 2020 Evolution and stability of the West Antarctic Ice Sheet In this intensive 3.5-week long course — co-taught with Dr. Christine Siddoway — I taught the fundamentals of glaciology and ice-sheet modeling. I guided advanced undergraduates through design, implementation, and analysis of numerical model experiments using a state-of-the-art ice sheet model for comparison with their stratigraphic and isotopic analyses of new sediment cores from the margin of West Antarctica. As a Teaching Assistant at the University of Washington Spring 2019 Introduction to Earth Sciences Winter 2018 Earth Materials Spring 2016 Economic Geology Fall 2014 Introduction to Earth Sciences; The Great Ice Age Winter 2014 Earth Materials Presentations & Abstracts * Denotes undergraduate student Hillebrand, TR, MJ Hoffman, S Price, M Perego, A Roat*, I Howat (2021). Projections of 21st century sea-level contribution from the retreat of Humboldt Glacier, North Greenland. Oral presentation at Community Earth System Model Land Ice Working Group meeting. Hillebrand, TR, MJ Hoffman, S Price, M Perego, I Howat (2020). Projections of 21st century sea-level rise from Humboldt Glacier, north Greenland. In American Geophysical Union Fall Meeting 2020 Abstracts. Oral presentation at AGU Fall Meeting (online) Koutnik, MR, TR Hillebrand, H Conway, B Smith, J Stone, PE Spector (2020). Assimilating glaciological and geochronological data into ice-flow models to constrain the deglaciation of Beardmore Glacier, Transantarctic Mountains. In AGU Fall Meeting 2020 Abstracts. Oral presentation at AGU Fall Meeting (online) Breyer, C, G Barcheck, R Gomez-Fell, TR Hillebrand, BH Hills, LM Kaluzienski, J Martin, D Polashenski, D Shapero (2020). Ice sheet surface velocity determination from ICESat-2 repeat tracks. In AGU Fall Meeting 2020 Abstracts. Poster presentation at AGU Fall Meeting (online) *Roat, A, TR Hillebrand, MJ Hoffman (2020). Investigating the impacts of channelized subglacial hydrology on melt rates at the margin of Humboldt Glacier in northern Greenland. In AGU Fall Meeting 2020 Abstracts. Poster presentation at AGU Fall Meeting (online) Hillebrand, TR, MR Koutnik (2020). Variable response of Transantarctic outlet glaciers to grounding-line retreat during the last deglaciation. Oral presentation at