Personal profile
Research interests
I am a land ice modeler working with the Community Ice Sheet Model (CISM) as a stand alone model and as a components of the Community Earth System Model (CESM). My interests are in improving the representation of land ice (ice sheet and glaciers) and better understand their feedback with the Earth System across time scales. In particular, I am interested in sea level, ice-ocean interaction, the role of ice sheets in ocean primary production, the past and future of ice sheets and glaciers in a changing world.
I work on improving the usability of CISM by the community including seting up and running the model, and looking at diagnostics.
Beyond land ice, I am also interested in the development of professional development for early careers at NSF NCAR.
Related documents
Education/Academic qualification
Mathematics, PhD, New Mexico Institute of Mining and Technology
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Collaborations and top research areas from the last five years
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A framework for three-dimensional dynamic modeling of mountain glaciers in the Community Ice Sheet Model (CISM v2.2)
Minallah, S., Lipscomb, W., Leguy, G. & Zekollari, H., Sep 1 2025, In: Geoscientific Model Development. 18, p. 5467 5486 p.Research output: Contribution to journal › Article › peer-review
Open Access -
A topographically controlled tipping point for complete Greenland ice sheet melt
Petrini, M., Scherrenberg, M. D. W., Muntjewerf, L., Vizcaino, M., Sellevold, R., Leguy, G. R., Lipscomb, W. H. & Goelzer, H., Jan 9 2025, In: Cryosphere. 19, 1, p. 63-81 19 p.Research output: Contribution to journal › Article › peer-review
Open Access9 Scopus citations -
Glacier preservation doubled by limiting warming to 1.5°C versus 2.7°C
Zekollari, H., Schuster, L., Maussion, F., Hock, R., Marzeion, B., Rounce, D. R., Compagno, L., Fujita, K., Huss, M., James, M., Kraaijenbrink, P. D. A., Lipscomb, W. H., Minallah, S., Oberrauch, M., Van Tricht, L., Champollion, N., Edwards, T., Farinotti, D., Immerzeel, W. & Leguy, G. & 1 others, , May 29 2025, In: Science. 388, 6750, p. 979-983 5 p.Research output: Contribution to journal › Article › peer-review
Open Access21 Scopus citations -
Interactive coupling of a Greenland ice sheet model in NorESM2
Goelzer, H., Langebroek, P. M., Born, A., Hofer, S., Haubner, K., Petrini, M., Leguy, G., Lipscomb, W. H. & Thayer-Calder, K., Oct 27 2025, In: Geoscientific Model Development. 18, 20, p. 7853-7867 15 p.Research output: Contribution to journal › Article › peer-review
Open Access3 Scopus citations -
Interactive coupling of a Greenland ice sheet model in NorESM2
Thayer-Calder, K., Goelzer, H., Langebroek, P. M., Born, A., Hofer, S., Petrini, M., Leguy, G. & Lipscomb, W., 2025, (E-pub ahead of print) In: EGUsphere.Research output: Contribution to journal › Article › peer-review
Activities
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LIWG brief historical facts and highlights
Leguy, G. (Speaker)
Jun 9 2025Activity: Give a talk or presentation › Oral presentation
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Nature Geosciences (Journal)
Leguy, G. (Reviewer)
May 1 2025 → Nov 2025Activity: Publication peer-review and editorial work › Publication Peer-review
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Version 3 of the Community Ice Sheet Model
Leguy, G. (Speaker)
Apr 30 2025Activity: Give a talk or presentation › Poster
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Land ice updates
Leguy, G. (Speaker)
Jan 28 2025Activity: Give a talk or presentation › Oral presentation
Datasets
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Marine Ice Sheet Experiments CISM 2021
Leguy, G. (Creator) & Lipscomb, W. (Creator), NSF NCAR CISL - Information Sciences Division, May 26 2021
DOI: 10.5065/k3ws-2435
Dataset
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Data Release for Retreat and Regrowth of the Greenland Ice Sheet During the Last Interglacial as Simulated by the CESM2-CISM2 Coupled ClimateâIce Sheet Model
Leguy, G. (Creator) & Otto-Bliesner, B. (Creator), NSF NCAR CISL - Information Sciences Division, Nov 5 2021
DOI: 10.5065/as0j-6387
Dataset
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CESM2 Last Interglacial at 127ka control
Leguy, G. (Creator), Lipscomb, W. (Creator) & Otto-Bliesner, B. (Creator), NSF NCAR - National Center for Atmospheric Research, Sep 11 2024
DOI: 10.5065/1K5C-SG05
Dataset
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CESM2 lig127ka FW simulations
Leguy, G. (Creator), Lipscomb, W. (Creator) & Otto-Bliesner, B. (Creator), NSF NCAR - National Center for Atmospheric Research, Sep 11 2024
DOI: 10.5065/PXM0-MC93
Dataset