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Open research questions in Arctic and Antarctic ice dynamics

34 unresolved questions extracted from the limitations and future-work sections of 594 Arctic and Antarctic ice dynamics papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • (salt Future work should address: (1) cryogenic-vacuum chamber experiments at T < 150 K to validate the sublimation-to- melting transition model; (2) 3D CFD with heterogeneous to quantify off- ice analysis axis for high-fidelity descent ice- including buoyancy interface ocean control.

    Thermal-fluid analysis of an RTG-powered ice penetrator for europa subsurface access: CFD modeling with phase-regime analysis · 2026 · DOI

  • In this preliminary study, we have expanded upon the classical picture that late spring–summer melting of Antarctic sea ice occurs by lateral and basal melting accelerated by a positive ocean–ice albedo feedback (e.g., Horvat, 2022) accentuated by the wave-driven breakup of floes in the MIZ – by providing evidence that waves also drive rapid ice surface (and interior) melting that has been neglected to date. We propose that wave flooding and wave pulverisation remove the thermal and optical buffer provided by snow cover and/or mechanically grind down floes into wave slush and also create optimal habitat for proliferation of ice algae (wave greening) – not only in the MIZ but also in the interior SIZ. 5.1 Albedo reduction With simple one-dimensional modelling based on proxy estimates of wave-modified ice albedo, we show that the wavedriven reduction in sea-ice albedo is as much as 0.54, and that this enhances the vertical melt-rate by up to an extra 4.3 cm d−1 (compared to a snow-covered first-year floe). We also propose that wave greening decreases the albedo by an additional 0.1 to a combined reduction of 0.64, to amplify the wave-driven melt enhancement to as much as 5.1 cm d−1, and as much as 6.1 cm d−1 if the floe density is taken to be 750 kg m−3 (rather than 905 kg m−3). Not only this, but we also propose that wave flooding, pulverisation and greening activate five coupled positive feedbacks and sub-feedbacks that potentially further accelerate the melt-rate enhancement as summer progresses. 5.2 Wave ponding In the Arctic, there has been strong recognition of the need for explicit or implicit treatment of melt ponds in climate and Earth system models (e.g., Taylor and Feltham, 2004; Flocco et al., 2010; Tsamados et al., 2015; Webster et al., 2022; Diamond et al., 2023), in order to simulate Earth’s radiation balance (Maslanik et al., 2007; Perovich et al., 2008; Nicolaus et al., 2010) and the strength of the ice–albedo feedback (Curry et al., 1995, 2001; Tschudi et al., 2008). Results presented here suggest that the same recognition and parameterisation in models is required for wave-overwashed floes, saline wave ponds, wave slush and wave greening and associated feedbacks in the Antarctic (and the Arctic). However, there are fundamental differences. Unlike Arctic melt ponding, wave flooding and wave pulverisation (in the Antarctic and the Arctic) are not limited to the warm season but rather occur year-round. Although wave-melting processes may in- fluence a small proportion of the overall SIZ at the start of the melt season, the proportion affected is likely to increase as the SIZ recedes through summer. Wave melting also has implications for the ocean freshwater budget and upper-ocean buoyancy and stratification, which would feed back to influence sea-ice formation and melt.

    The influence of ocean waves on Antarctic sea-ice albedo and seasonal melting, and potential coupled physical and biological feedbacks · 2026 · DOI

  • In conclusion, surveys like this provide a valuable overview of the current status, plans, and data needs not only for the Southern Ocean but also for the global modeling community. There are also some experiences to take away from this exer- cise, in particular how the pool of respondents shapes the use- fulness of the survey, how to ask targeted questions without being exclusive, how pre-defined multiple-choice answers simplify the analysis but reduce the variety of responses, and which meta-information really is instrumental for interpret- ing the responses. All of this is well known and demonstrates the importance to involve experts on questionnaire design rather than constructing an ad hoc survey. Nevertheless, the feedback by the community to our survey has been very pos- itive indicating that such surveys can be a valuable tool for future international program planning. With the Antarctica InSync program in active planning and IPY5 approaching, we hope the results presented – with ad- ditional data available (Martin et al., 2025) – will inform https://doi.org/10.5194/os-22-1429-2026 Ocean Sci., 22, 1429–1437, 2026 1434 T. Martin et al.: Opinion: status, plans and needs of Southern Ocean modelling both the scientific community and stakeholders to advance observations and models. The findings already contributed to the SOOS/OCEAN:ICE Workshop discussions and con- clusions. Research priorities include ice–ocean interactions, Southern Ocean heat and carbon uptake, and the recent ma- jor changes in sea ice. Addressing these challenges requires model developments such as ice–shelf–ocean coupling, im- plementing biogeochemical processes, and applying higher resolution grids, alongside improved understanding of con- tinental shelf processes and upper-ocean stratification. This, in turn, requires new observations in key regions with ice shelves most vulnerable to warm water intrusions and ocean circulation choke points. Further, the survey results call for stronger communication between the modeling and observ- ing communities and dedicated data-use training for model- ers. Antarctica InSync offers a major opportunity to advance such efforts.

    Opinion: status, plans and needs of Southern Ocean modelling · 2026 · DOI

  • Long-term observations are required to disentangle complex interactions between tropical SST anomalies and Antarctic fast ice and validate the proposed mechanisms.

    The variability of Antarctic fast ice extent related to tropical sea surface temperature anomalies · 2026 · DOI

  • Yet, its future remains uncertain: the gyre could strengthen as sea ice declines and allows increased wind stress on the ocean, or weaken along with the Beaufort High (BH) pressure system.

    The Arctic Beaufort Gyre in CMIP6 Models: Present and Future · 2025 · DOI

  • However, as the obtained correlations are not very strong, the results are insufficient to confirm the hypothesis that the Arctic Sea ice extent impacts negative AO and NAO phases likelihood and requires further research.

    Relationship between cold season air temperature in the Baltic sea region and the Arctic sea ice extent · 2023 · DOI

  • While this fundamental restructuring leads to distinct gradients in ions, dissolved gases, and nutrients throughout the water column, surprisingly little is known about the resulting effects on ecosystem processes and food webs, highlighting the lack of a general limnological framework that characterizes the structure and function of lakes under a gradient of ice cover.

    The Lake Ice Continuum Concept: Influence of Winter Conditions on Energy and Ecosystem Dynamics · 2021 · DOI

  • For example, recent (beginning in the late 1990s) mass loss via outlet glaciers has been attributed primarily to changing ice‐ocean interactions, driven by both oceanic and atmospheric warming, but the exact mechanisms controlling the onset of glacier retreat and the processes that regulate the amount of retreat remain uncertain.

    Future Evolution of Greenland's Marine‐Terminating Outlet Glaciers · 2019 · DOI

  • Abstract The eastern north coast of Greenland is considered to be highly sensitive to the ongoing Arctic warming, but there is a general lack of data on modern conditions and in particular on the modern distribution of climate and environmental proxies to provide a baseline and context for studies on past variability.

    Linking the Modern Distribution of Biogenic Proxies in High Arctic Greenland Shelf Sediments to Sea Ice, Primary Production, and Arctic‐Atlantic Inflow · 2018 · DOI

  • 13 However, to UNCLOS's use of poorly defined phrases such as due regard,14 Arctic navigation laws passed by the Arctic Coastal States (Canada, Denmark,15 Norway, Russia, and the United States)16 are arguably inconsistent with the framework's intent, not to mention inconsistent with other nations' laws passed in response to the same framework.

    An Ocean between Us: The Implications of Inconsistencies between the Navigational Laws of Coastal Arctic Council Nations and the United Nations Convention on the Law of the Sea for Arctic Navigation · 2017

  • The study focused on remote forcing of tropical and subtropical SSTs on Antarctic fast ice but acknowledges that direct oceanic forcing is local and includes both dynamic factors (currents, tidal effects, and swell) and thermodynamic factors (basal melt) that warrant further investigation.

    The variability of Antarctic fast ice extent related to tropical sea surface temperature anomalies · 2026 · DOI

  • The 18 year study period (2000–2018) was insufficient to capture the interdecadal-scale oscillations that may influence Antarctic fast ice dynamics.

    The variability of Antarctic fast ice extent related to tropical sea surface temperature anomalies · 2026 · DOI

  • These include increases in atmospheric-storm frequency and surface-heat-loss-driven dense water formation, although the implications of the densification for broader processes such as Antarctic bottom water formation remain unclear.

    Record-low Antarctic sea ice in 2023 increased ocean heat loss and storms · 2024 · DOI

  • Abstract High‐resolution observations of melt ponds (MPs) across the Arctic are lacking, yet essential for understanding the sea ice energy budget and under‐ice ecology.

    Classification of Sea Ice Summer Melt Features in High‐Resolution IceBridge Imagery · 2020 · DOI

  • However, it remains unclear how changes in near‐Antarctic climate translate mechanistically to changes in mWDW access to the FRIS cavity.

    Bistability of the Filchner‐Ronne Ice Shelf Cavity Circulation and Basal Melt · 2020 · DOI

  • Abstract Although perennially ice‐covered Antarctic lakes have experienced variable ice thicknesses over the past several decades, future ice thickness trends and associated aquatic biological responses under projected global warming remain unknown.

    Prediction of Ice‐Free Conditions for a Perennially Ice‐Covered Antarctic Lake · 2019 · DOI

  • A prerequisite for modeling the ice sheet and oceanographic processes within the cavity is an accurate knowledge of the sub‐ice sheet bedrock elevation, but beneath the ice shelf where airborne radar cannot penetrate, bathymetric data are sparse.

    A New Bathymetry for the Southeastern Filchner‐Ronne Ice Shelf: Implications for Modern Oceanographic Processes and Glacial History · 2018 · DOI

  • Onset of the spring bloom of ice algae is typically limited by the availability of light, and the current consensus is that a few tens‐of‐centimeters of snow is enough to prevent sufficient solar radiation to reach underneath the sea ice.

    Extreme Low Light Requirement for Algae Growth Underneath Sea Ice: A Case Study From Station Nord, NE Greenland · 2018 · DOI

  • Whereas ongoing changes are closely monitored through satellite observations, we have only limited data of past Arctic sea-ice cover derived from short historical records, indirect terrestrial proxies, and low-resolution marine sediment cores.

    A Study on Social Software Preferences in Secundary Education · 2014 · DOI

  • An evaluation of modeled sea‐ice coverage based on sea‐ice area gives, however, conflicting results compared to an evaluation based on sea‐ice extent and is additionally hindered by uncertainties in the observational record.

    Arctic sea‐ice evolution as modeled by Max Planck Institute for Meteorology's Earth system model · 2013 · DOI

  • Although the mechanical interaction between ice and till is well established, very little is known about the potential effect of regionally scaled water transport in a basal water system, which has only recently become apparent.

    The influence of subglacial hydrology on the flow of Kamb Ice Stream, West Antarctica · 2012 · DOI

  • At least different aspects of the problem should be examined by groups of specialists. The problems related to the anchoring' of tow lines should be investigated. Methods for reducing melting losses should be examined.

    Towing Icebergs to Irrigate Arid Lands: Manna or Madness? · 1973 · DOI

  • These do in fact suggest rock bars isolating separate basins, but the sound- ings are scarcely close enough to eliminate the possibility of valleys crossing them.

    The legacy of an ice gap · 1957 · DOI

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34 open questions have been extracted from the limitations and future-work passages of 594 Arctic and Antarctic ice dynamics papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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