Articles | Volume 18, issue 20
https://doi.org/10.5194/gmd-18-7475-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-18-7475-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Model description paper
| 
21 Oct 2025
Model description paper |
| 21 Oct 2025
| 21 Oct 2025
FjordRPM v1.0: a reduced-physics model for efficient simulation of glacial fjords
School of Geosciences, University of Edinburgh, Edinburgh, UK
Eleanor Johnstone
School of Geosciences, University of Edinburgh, Edinburgh, UK
Martim Mas e Braga
School of Geography and Sustainable Development, University of St Andrews, St Andrews, UK
Neil J. Fraser
Scottish Association for Marine Science, Oban, UK
Tom Cowton
School of Geography and Sustainable Development, University of St Andrews, St Andrews, UK
Mark Inall
Scottish Association for Marine Science, Oban, UK
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Donald A. Slater and Till J. W. Wagner
The Cryosphere, 19, 2475–2493, https://doi.org/10.5194/tc-19-2475-2025, https://doi.org/10.5194/tc-19-2475-2025, 2025
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Calving is when icebergs break off glaciers and fall into the ocean. It is an important process determining how ice sheets will respond to changes in climate, but it is currently poorly understood and hard to include in numerical models that are used for sea-level projections. We adapted and extended an existing theory for how this process works, better explaining observations showing that calving style depends on how thick the ice is.
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Ice mélange is a mixture of icebergs and sea ice which floats in front of Greenland’s largest glaciers. The presence of an ice mélange can have a significant impact on a glacier and its fjord, but the melting of an ice mélange by the ocean is currently poorly understood. We used computer simulations to develop an equation which describes how ice mélange melts under different environmental conditions.
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Marine-terminating glaciers can lose mass through frontal ablation, which comprises submarine and surface melting, and iceberg calving. We estimate frontal ablation for 49 marine-terminating glaciers in Greenland by combining existing, satellite derived data and calculating volume change near the glacier front over time. The dataset offers exciting opportunities to study the influence of climate forcings on marine-terminating glaciers in Greenland over multi-decadal timescales.
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This preprint is open for discussion and under review for Geoscientific Model Development (GMD).
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Short summary
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Calving is when icebergs break off glaciers and fall into the ocean. It is an important process determining how ice sheets will respond to changes in climate, but it is currently poorly understood and hard to include in numerical models that are used for sea-level projections. We adapted and extended an existing theory for how this process works, better explaining observations showing that calving style depends on how thick the ice is.
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Ice mélange is a mixture of icebergs and sea ice which floats in front of Greenland’s largest glaciers. The presence of an ice mélange can have a significant impact on a glacier and its fjord, but the melting of an ice mélange by the ocean is currently poorly understood. We used computer simulations to develop an equation which describes how ice mélange melts under different environmental conditions.
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Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2023-411, https://doi.org/10.5194/essd-2023-411, 2023
Preprint withdrawn
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Marine-terminating glaciers can lose mass through frontal ablation, which comprises submarine and surface melting, and iceberg calving. We estimate frontal ablation for 49 marine-terminating glaciers in Greenland by combining existing, satellite derived data and calculating volume change near the glacier front over time. The dataset offers exciting opportunities to study the influence of climate forcings on marine-terminating glaciers in Greenland over multi-decadal timescales.
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Benjamin R. Loveday, Timothy Smyth, Anıl Akpinar, Tom Hull, Mark E. Inall, Jan Kaiser, Bastien Y. Queste, Matt Tobermann, Charlotte A. J. Williams, and Matthew R. Palmer
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Sophie Goliber, Taryn Black, Ginny Catania, James M. Lea, Helene Olsen, Daniel Cheng, Suzanne Bevan, Anders Bjørk, Charlie Bunce, Stephen Brough, J. Rachel Carr, Tom Cowton, Alex Gardner, Dominik Fahrner, Emily Hill, Ian Joughin, Niels J. Korsgaard, Adrian Luckman, Twila Moon, Tavi Murray, Andrew Sole, Michael Wood, and Enze Zhang
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Terminus traces have been used to understand how Greenland's glaciers have changed over time; however, manual digitization is time-intensive, and a lack of coordination leads to duplication of efforts. We have compiled a dataset of over 39 000 terminus traces for 278 glaciers for scientific and machine learning applications. We also provide an overview of an updated version of the Google Earth Engine Digitization Tool (GEEDiT), which has been developed specifically for the Greenland Ice Sheet.
Benjamin Joseph Davison, Tom Cowton, Andrew Sole, Finlo Cottier, and Pete Nienow
The Cryosphere, 16, 1181–1196, https://doi.org/10.5194/tc-16-1181-2022, https://doi.org/10.5194/tc-16-1181-2022, 2022
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The ocean is an important driver of Greenland glacier retreat. Icebergs influence ocean temperature in the vicinity of glaciers, which will affect glacier retreat rates, but the effect of icebergs on water temperature is poorly understood. In this study, we use a model to show that icebergs cause large changes to water properties next to Greenland's glaciers, which could influence ocean-driven glacier retreat around Greenland.
Martim Mas e Braga, Richard Selwyn Jones, Jennifer C. H. Newall, Irina Rogozhina, Jane L. Andersen, Nathaniel A. Lifton, and Arjen P. Stroeven
The Cryosphere, 15, 4929–4947, https://doi.org/10.5194/tc-15-4929-2021, https://doi.org/10.5194/tc-15-4929-2021, 2021
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Mountains higher than the ice surface are sampled to know when the ice reached the sampled elevation, which can be used to guide numerical models. This is important to understand how much ice will be lost by ice sheets in the future. We use a simple model to understand how ice flow around mountains affects the ice surface topography and show how much this influences results from field samples. We also show that models need a finer resolution over mountainous areas to better match field samples.
Martim Mas e Braga, Jorge Bernales, Matthias Prange, Arjen P. Stroeven, and Irina Rogozhina
The Cryosphere, 15, 459–478, https://doi.org/10.5194/tc-15-459-2021, https://doi.org/10.5194/tc-15-459-2021, 2021
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We combine a computer model with different climate records to simulate how Antarctica responded to warming during marine isotope substage 11c, which can help understand Antarctica's natural drivers of change. We found that the regional climate warming of Antarctica seen in ice cores was necessary for the model to match the recorded sea level rise. A collapse of its western ice sheet is possible if a modest warming is sustained for ca. 4000 years, contributing 6.7 to 8.2 m to sea level rise.
Cited articles
Abib, N., Sutherland, D. A., Peterson, R., Catania, G., Nash, J. D., Shroyer, E. L., Stearns, L. A., and Bartholomaus, T. C.: Ice mélange melt changes observed water column stratification at a tidewater glacier in Greenland, The Cryosphere, 18, 4817–4829, https://doi.org/10.5194/tc-18-4817-2024, 2024. a
Babson, A. L., Kawase, M., and MacCready, P.: Seasonal and interannual variability in the circulation of Puget Sound, Washington: a box model study, Atmos. Ocean, 44, 29–45, 2006. a
Beaird, N. L., Straneo, F., and Jenkins, W.: Export of strongly diluted Greenland meltwater from a major glacial fjord, Geophys. Res. Lett., 45, 4163–4170, https://doi.org/10.1029/2018GL077000, 2018. a
Bendtsen, J., Rysgaard, S., Carlson, D. F., Meire, L., and Sejr, M. K.: Vertical mixing in stratified fjords near tidewater outlet glaciers along Northwest Greenland, J. Geophys. Res.-Oceans, 126, e2020JC016898, https://doi.org/10.1029/2020JC016898, 2021. a
Böning, C. W., Behrens, E., Biastoch, A., Getzlaff, K., and Bamber, J. L.: Emerging impact of Greenland meltwater on deepwater formation in the North Atlantic Ocean, Nat. Geosci., 9, 523–527, https://doi.org/10.1038/ngeo2740, 2016. a
Bonneau, J., Laval, B. E., Mueller, D., Hamilton, A. K., and Antropova, Y.: Heat fluxes in a glacial fjord: the role of buoyancy-driven circulation and offshore forcing, Geophys. Res. Lett., 51, e2024GL111242, https://doi.org/10.1029/2024GL111242, 2024. a
Carroll, D., Sutherland, D. A., Shroyer, E. L., Nash, J. D., Catania, G. A., and Stearns, L. A.: Modeling turbulent subglacial meltwater plumes: implications for fjord-scale buoyancy-driven circulation, J. Phys. Oceanogr., 45, 2169–2185, https://doi.org/10.1175/JPO-D-15-0033.1, 2015. a, b
Cenedese, C. and Straneo, F.: Icebergs melting, Annu. Rev. Fluid Mech., 55, 377–402, https://doi.org/10.1146/annurev-fluid-032522-100734, 2023. a, b, c
Cowton, T., Slater, D., Sole, A., Goldberg, D., and Nienow, P.: Modeling the impact of glacial runoff on fjord circulation and submarine melt rate using a new subgrid-scale parameterization for glacial plumes, J. Geophys. Res.-Oceans, 120, 796–812, https://doi.org/10.1002/2014JC010324, 2015. a, b, c
Cowton, T., Sole, A., Nienow, P., Slater, D., Wilton, D., and Hanna, E.: Controls on the transport of oceanic heat to Kangerdlugssuaq Glacier, East Greenland, J. Glaciol., 62, 1167–1180, https://doi.org/10.1017/jog.2016.117, 2016. a
Davison, B. J., Cowton, T. R., Cottier, F. R., and Sole, A. J.: Iceberg melting substantially modifies oceanic heat flux towards a major Greenlandic tidewater glacier, Nat. Commun., 11, 5983, https://doi.org/10.1038/s41467-020-19805-7, 2020. a, b, c
Enderlin, E. M., Hamilton, G. S., Straneo, F., and Sutherland, D. A.: Iceberg meltwater fluxes dominate the freshwater budget in Greenland's iceberg-congested glacial fjords, Geophys. Res. Lett., 43, 11287–11294, https://doi.org/10.1002/2016GL070718, 2016. a, b, c
FitzMaurice, A., Cenedese, C., and Straneo, F.: Nonlinear response of iceberg side melting to ocean currents, Geophys. Res. Lett., 44, 5637–5644, https://doi.org/10.1002/2017GL073585, 2017. a
Frajka-Williams, E., Bamber, J. L., and Vage, K.: Greenland melt and the Atlantic meridional overturning circulation, Oceanography, 29, 22–33, https://doi.org/10.5670/oceanog.2016.96, 2016. a
Geyer, W. R. and MacCready, P.: The estuarine circulation, Annu. Rev. Fluid Mech., 46, 175–197, https://doi.org/10.1146/annurev-fluid-010313-141302, 2014. a, b
Gillard, L. C., Hu, X., Myers, P. G., and Bamber, J. L.: Meltwater pathways from marine terminating glaciers of the Greenland ice sheet, Geophys. Res. Lett., 43, 10873–10882, https://doi.org/10.1002/2016GL070969, 2016. a
Gillibrand, P., Inall, M., Portilla, E., and Tett, P.: A box model of the seasonal exchange and mixing in regions of restricted exchange: application to two contrasting Scottish inlets, Environ. Modell. Softw., 43, 144–159, 2013. a
Goelzer, H., Nowicki, S., Payne, A., Larour, E., Seroussi, H., Lipscomb, W. H., Gregory, J., Abe-Ouchi, A., Shepherd, A., Simon, E., Agosta, C., Alexander, P., Aschwanden, A., Barthel, A., Calov, R., Chambers, C., Choi, Y., Cuzzone, J., Dumas, C., Edwards, T., Felikson, D., Fettweis, X., Golledge, N. R., Greve, R., Humbert, A., Huybrechts, P., Le clec'h, S., Lee, V., Leguy, G., Little, C., Lowry, D. P., Morlighem, M., Nias, I., Quiquet, A., Rückamp, M., Schlegel, N.-J., Slater, D. A., Smith, R. S., Straneo, F., Tarasov, L., van de Wal, R., and van den Broeke, M.: The future sea-level contribution of the Greenland ice sheet: a multi-model ensemble study of ISMIP6, The Cryosphere, 14, 3071–3096, https://doi.org/10.5194/tc-14-3071-2020, 2020. a
Golledge, N. R., Keller, E. D., Gomez, N., Naughten, K. A., Bernales, J., Trusel, L. D., and Edwards, T. L.: Global environmental consequences of twenty-first-century ice-sheet melt, Nature, 566, 65–72, https://doi.org/10.1038/s41586-019-0889-9, 2019. a
Hager, A. O., Sutherland, D. A., Amundson, J. M., Jackson, R. H., Kienholz, C., Motyka, R. J., and Nash, J. D.: Subglacial discharge reflux and buoyancy forcing drive seasonality in a silled glacial fjord, J. Geophys. Res.-Oceans, 127, https://doi.org/10.1029/2021JC018355, 2022. a, b
Hager, A. O., Sutherland, D. A., and Slater, D. A.: Local forcing mechanisms challenge parameterizations of ocean thermal forcing for Greenland tidewater glaciers, The Cryosphere, 18, 911–932, https://doi.org/10.5194/tc-18-911-2024, 2024. a
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., De Chiara, G., Dahlgren, P., Dee, D., Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer, A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková, M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., de Rosnay, P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.-N.: The ERA5 global reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049, https://doi.org/10.1002/qj.3803, 2020. a
Hewitt, I. J.: Subglacial plumes, Annu. Rev. Fluid Mech., 52, 145–169, https://doi.org/10.1146/annurev-fluid-010719-060252, 2020. a
Holland, D. M. and Jenkins, A.: Modeling thermodynamic ice-ocean interactions at the base of an ice shelf, J. Phys. Oceanogr., 29, 1787–1800, https://doi.org/10.1175/1520-0485(1999)029<1787:MTIOIA>2.0.CO;2, 1999. a
Jackson, L. C., Alastrué de Asenjo, E., Bellomo, K., Danabasoglu, G., Haak, H., Hu, A., Jungclaus, J., Lee, W., Meccia, V. L., Saenko, O., Shao, A., and Swingedouw, D.: Understanding AMOC stability: the North Atlantic Hosing Model Intercomparison Project, Geosci. Model Dev., 16, 1975–1995, https://doi.org/10.5194/gmd-16-1975-2023, 2023. a
Jackson, R. H., Straneo, F., and Sutherland, D. A.: Externally forced fluctuations in ocean temperature at Greenland glaciers in non-summer months, Nat. Geosci., 7, 503–508, https://doi.org/10.1038/ngeo2186, 2014. a, b, c
Jackson, R. H., Shroyer, E. L., Nash, J. D., Sutherland, D. A., Carroll, D., Fried, M. J., Catania, G. A., Bartholomaus, T. C., and Stearns, L. A.: Near-glacier surveying of a subglacial discharge plume: implications for plume parameterizations, Geophys. Res. Lett., 44, 6886–6894, https://doi.org/10.1002/2017GL073602, 2017. a, b, c
Jackson, R. H., Lentz, S. J., and Straneo, F.: The dynamics of shelf forcing in Greenlandic fjords, J. Phys. Oceanogr., 48, 2799–2827, https://doi.org/10.1175/JPO-D-18-0057.1, 2018. a
Jackson, R. H., Motyka, R. J., Amundson, J. M., Abib, N., Sutherland, D. A., Nash, J. D., and Kienholz, C.: The relationship between submarine melt and subglacial discharge from observations at a tidewater glacier, J. Geophys. Res.-Oceans, 127, e2021JC018204, https://doi.org/10.1029/2021JC018204, 2022. a
Mankoff, K. D., Straneo, F., Cenedese, C., Das, S. B., Richards, C. G., and Singh, H.: Structure and dynamics of a subglacial discharge plume in a Greenlandic fjord, J. Geophys. Res.-Oceans, 121, 8670–8688, https://doi.org/10.1002/2016JC011764, 2016. a
Moon, T., Sutherland, D., Carroll, D., Felikson, D., Kehrl, L., and F., S.: Subsurface iceberg melt key to Greenland fjord freshwater budget, Nat. Geosci., 11, 49–54, https://doi.org/10.1038/s41561-017-0018-z, 2018. a, b
Mortensen, J., Bendtsen, J., Lennert, K., and S., R.: Seasonal variability of the circulation system in a West Greenland tidewater outlet glacier fjord, Godthabsfjord (64°N), J. Geophys. Res.-Earth, 119, 2591–2603, https://doi.org/10.1002/2014JF003267, 2014. a
Morton, B., Taylor, G., and Turner, J.: Turbulent gravitational convection from maintained and instantaneous sources, P. Roy. Soc. A-Math. Phy., 234, 1–23, https://doi.org/10.1098/rspa.1956.0011, 1956. a
Mouginot, J., Rignot, E., Bjørk, A. A., van den Broeke, M., Millan, R., Morlighem, M., Noël, B., Scheuchl, B., and Wood, M.: Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018, P. Natl. Acad. Sci. USA, 116, 9239–9244, https://doi.org/10.1073/pnas.1904242116, 2019. a
Moyer, A. N., Sutherland, D. A., Nienow, P. W., and Sole, A. J.: Seasonal variations in iceberg freshwater flux in Sermilik Fjord, Southeast Greenland from Sentinel-2 imagery, Geophys. Res. Lett., 46, 8903–8912, https://doi.org/10.1029/2019GL082309, 2019. a
Neshyba, S. and Josberger, E. G.: On the estimation of Antarctic iceberg melt rate, J. Phys. Oceanogr., 10, 1681–1685, https://doi.org/10.1175/1520-0485(1980)010<1681:OTEOAI>2.0.CO;2, 1980. a
Nguyen, A. T., Pillar, H., Ocaña, V., Bigdeli, A., Smith, T. A., and Heimbach, P.: The Arctic Subpolar gyre sTate Estimate: description and assessment of a data-constrained, dynamically consistent ocean-sea ice estimate for 2002–2017, J. Adv. Model. Earth Sy., 13, https://doi.org/10.1029/2020MS002398, 2021. a, b
Nilsson, J., van Dongen, E., Jakobsson, M., O'Regan, M., and Stranne, C.: Hydraulic suppression of basal glacier melt in sill fjords, The Cryosphere, 17, 2455–2476, https://doi.org/10.5194/tc-17-2455-2023, 2023. a, b
Noël, B., van de Berg, W. J., van Wessem, J. M., van Meijgaard, E., van As, D., Lenaerts, J. T. M., Lhermitte, S., Kuipers Munneke, P., Smeets, C. J. P. P., van Ulft, L. H., van de Wal, R. S. W., and van den Broeke, M. R.: Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 1: Greenland (1958–2016), The Cryosphere, 12, 811–831, https://doi.org/10.5194/tc-12-811-2018, 2018. a
Oliver, H., Slater, D., Carroll, D., Wood, M., Morlighem, M., and Hopwood, M. J.: Greenland subglacial discharge as a driver of hotspots of increasing coastal chlorophyll since the early 2000s, Geophys. Res. Lett., 50, https://doi.org/10.1029/2022GL102689, 2023. a
Sanchez, R., Slater, D., and Straneo, F.: Delayed freshwater export from a Greenland tidewater glacial fjord, J. Phys. Oceanogr., 53, 1291–1309, https://doi.org/10.1175/JPO-D-22-0137.1, 2023. a, b, c, d
Sciascia, R., Straneo, F., Cenedese, C., and Heimbach, P.: Seasonal variability of submarine melt rate and circulation in an East Greenland fjord, J. Geophys. Res.-Oceans, 118, 2492–2506, https://doi.org/10.1002/jgrc.20142, 2013. a
Slater, D. A., Goldberg, D. N., Nienow, P. W., and Cowton, T. R.: Scalings for submarine melting at tidewater glaciers from buoyant plume theory, J. Phys. Oceanogr., 46, 1839–1855, https://doi.org/10.1175/JPO-D-15-0132.1, 2016. a
Slater, D. A., Straneo, F., Das, S. B., Richards, C. G., Wagner, T. J. W., and Nienow, P. W.: Localized plumes drive front-wide ocean melting of a Greenlandic tidewater glacier, Geophys. Res. Lett., 45, 12350–12358, https://doi.org/10.1029/2018GL080763, 2018. a
Slater, D. A., Felikson, D., Straneo, F., Goelzer, H., Little, C. M., Morlighem, M., Fettweis, X., and Nowicki, S.: Twenty-first century ocean forcing of the Greenland ice sheet for modelling of sea level contribution, The Cryosphere, 14, 985–1008, https://doi.org/10.5194/tc-14-985-2020, 2020. a
Slater, D., Johnstone, E., e Braga, M. M., Fraser, N., Cowton, T., and Inall, M.: FjordRPM v1.0: code release for GMD submission, Zenodo [code], https://doi.org/10.5281/zenodo.14536606, 2024. a
Stevens, L. A., Straneo, F., Das, S. B., Plueddemann, A. J., Kukulya, A. L., and Morlighem, M.: Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations, The Cryosphere, 10, 417–432, https://doi.org/10.5194/tc-10-417-2016, 2016. a
Straneo, F. and Cenedese, C.: The dynamics of Greenland's glacial fjords and their role in climate, Annu. Rev. Mar. Sci., 7, 89–112, https://doi.org/10.1146/annurev-marine-010213-135133, 2015. a, b
Straneo, F. and Heimbach, P.: North Atlantic warming and the retreat of Greenland's outlet glaciers, Nature, 504, 36–43, https://doi.org/10.1038/nature12854, 2013. a
Straneo, F., Curry, R. G., Sutherland, D. A., Hamilton, G. S., Cenedese, C., Vage, K., and Stearns, L. A.: Impact of fjord dynamics and glacial runoff on the circulation near Helheim Glacier, Nat. Geosci., 4, 322–327, https://doi.org/10.1038/ngeo1109, 2011. a
Sun, Q., Whitney, M. M., Bryan, F. O., and heng Tseng, Y.: A box model for representing estuarine physical processes in Earth system models, Ocean Model., 112, 139–153, 2017. a
van Westen, R. M., Kliphuis, M., and Dijkstra, H. A.: Physics-based early warning signal shows that AMOC is on tipping course, Science Advances, 10, eadk1189, https://doi.org/10.1126/sciadv.adk1189, 2024. a
Verjans, V., Robel, A., Thompson, A. F., and Seroussi, H.: Bias correction and statistical modeling of variable oceanic forcing of Greenland outlet glaciers, J. Adv. Model. Earth Sy., 15, e2023MS003610, https://doi.org/10.1029/2023MS003610, 2023. a
Xu, Y., Rignot, E., Menemenlis, D., and Koppes, M.: Numerical experiments on subaqueous melting of Greenland tidewater glaciers in response to ocean warming and enhanced subglacial discharge, Ann. Glaciol., 53, 229–234, https://doi.org/10.3189/2012AoG60A139, 2012. a
Zhao, K. X., Stewart, A. L., and McWilliams, J. C.: Geometric constraints on glacial fjord–shelf exchange, J. Phys. Oceanogr., 51, 1223–1246, https://doi.org/10.1175/JPO-D-20-0091.1, 2021. a, b, c
Zhao, K. X., Stewart, A. L., and McWilliams, J. C.: Linking overturning, recirculation, and melt in glacial fjords, Geophys. Res. Lett., 49, e2021GL095706, https://doi.org/10.1029/2021GL095706, 2022. a
Zuo, H., Balmaseda, M. A., Tietsche, S., Mogensen, K., and Mayer, M.: The ECMWF operational ensemble reanalysis–analysis system for ocean and sea ice: a description of the system and assessment, Ocean Sci., 15, 779–808, https://doi.org/10.5194/os-15-779-2019, 2019. a
Short summary
Glacial fjords connect ice sheets to the ocean, controlling heat delivery to glaciers, which impacts ice sheet melt, and freshwater discharge to the ocean, affecting ocean circulation. However, their dynamics are not captured in large-scale climate models. We designed a simplified, computationally efficient model – FjordRPM – that accurately captures key fjord processes. It has direct applications for improving projections of ice melt, ocean circulation, and sea level rise.
Glacial fjords connect ice sheets to the ocean, controlling heat delivery to glaciers, which...
