Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences最新文献

Harnessing machine learning to improve ice sheet bed mapping. 利用机器学习来改进冰原床测绘。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2024.0539

Steven Palmer, Charlie Kirkwood

{"title":"Harnessing machine learning to improve ice sheet bed mapping.","authors":"Steven Palmer, Charlie Kirkwood","doi":"10.1098/rsta.2024.0539","DOIUrl":"https://doi.org/10.1098/rsta.2024.0539","url":null,"abstract":"Airborne radio-echo sounding (RES) surveys are currently the primary method of measuring ice sheet thickness to derive subglacial topography, which underpins modelling efforts to improve projections of sea-level rise. However, the scientific impact of these campaigns is hampered by the time required to process the resulting radargrams. Here, we provide an overview of recent advances in machine learning (ML) relevant to ice sheet RES research to show that ML can enhance the value of RES data collected during past campaigns. We highlight two key areas where ML is already being used to enhance RES data analysis: (i) denoising and automated picking of radar returns; (ii) improved spatial interpolation and uncertainty quantification of flightline data. In addition, we suggest two areas where ML may also have a role when planning future surveys. We present examples from Antarctic and Greenland Ice Sheets that demonstrate how ML-driven approaches can outperform traditional methods for interpolation of basal topography and show that advances have been made in ML-based automated extraction of reflecting horizons from radargrams. As numerical ice sheet models become increasingly sophisticated, integrating ML throughout the workflow may help maximize observational value and guide future strategic efforts in the Polar Regions. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147777665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Next-generation radar bed measurements should be optimized for assimilation or repeat-pass profiling. 下一代雷达床测量应针对同化或重复通过剖面进行优化。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2024.0548

Dustin M Schroeder, Ellianna Abrahams, Anna L Broome, Winnie Chu, Riley Culberg, Eliza J Dawson, Emma J MacKie, Daniel F May, Matthew R Siegfried, Thomas O Teisberg, Sunme Zhao

{"title":"Next-generation radar bed measurements should be optimized for assimilation or repeat-pass profiling.","authors":"Dustin M Schroeder, Ellianna Abrahams, Anna L Broome, Winnie Chu, Riley Culberg, Eliza J Dawson, Emma J MacKie, Daniel F May, Matthew R Siegfried, Thomas O Teisberg, Sunme Zhao","doi":"10.1098/rsta.2024.0548","DOIUrl":"https://doi.org/10.1098/rsta.2024.0548","url":null,"abstract":"Ice-penetrating radar observation of bed echoes is a core geophysical technique in glaciology. In early and ongoing exploration and mapping surveys, areas with little or no data were often prioritized, leading to few repeated radar sounding profiles. In parallel, advances in radar sounding instruments, platforms and analysis approaches have dramatically opened possibilities for future survey design. Here, we consider the opportunities these advances present for next-generation bed measurements, including both assimilation-optimized mapping and repeat sounding. Based on this analysis, we argue that repeat-pass profiles of bed echo power and englacial layer echo phase should be key priorities for future observations. To that end, we evaluate the detectability of subglacial water bodies, including ocean intrusion in the grounding zone as a target for repeat-pass surveys. We also discuss the distinct implications of our suggested approaches for instrument, platform and survey choices to combine mapping and repeat-pass surveys across the time scales of ice-sheet change. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147777826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using Antarctic subglacial relic landscapes to inform past ice sheet retreat in the warm Pliocene. 利用南极冰下遗迹景观为上新世暖期冰盖退缩提供信息。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2024.0542

Rebecca Knight, Edward Gasson, Kate Littler, Taryn Noble, Anna Ruth Halberstadt

{"title":"Using Antarctic subglacial relic landscapes to inform past ice sheet retreat in the warm Pliocene.","authors":"Rebecca Knight, Edward Gasson, Kate Littler, Taryn Noble, Anna Ruth Halberstadt","doi":"10.1098/rsta.2024.0542","DOIUrl":"https://doi.org/10.1098/rsta.2024.0542","url":null,"abstract":"The resilience of the East Antarctic Ice Sheet (EAIS) to anthropogenic climate change has critical implications for future global sea level. Constraining how the ice sheet has responded to past periods of naturally elevated carbon dioxide and global warmth can provide vital clues as to its future stability. Relic fluvial landscapes preserved beneath the EAIS have been used to place limits on retreat into the Aurora Subglacial Basin (ASB) in the warm Pliocene (approx. 3 million years ago). Here, we use high-resolution ice sheet model (ISM) simulations to better understand if the preservation of this landscape precludes significant glacial retreat in this sector in at least the past 3 million years. We apply a subglacial topography map that resolves mesoscale landscape features within the model and create an ensemble of simulations with varying retreat into the ASB. Nearly all simulations feature predominantly cold-based ice caps on the landforms through warm interglacial periods of the Pliocene, meaning the fluvial landscape could have been preserved, even with significant grounding line retreat into the ASB. This study highlights the utility of well-resolved subglacial landscapes when paired with numerical model simulations in informing past ice sheet retreat. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of bed topography resolution on sea-level rise projections from coupled subglacial hydrology and ice dynamics for Thwaites Glacier, Antarctica. 南极Thwaites冰川床地形分辨率对冰下水文和冰动力耦合预测海平面上升的影响。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2024.0545

Shivani Ehrenfeucht, Christine Dow

{"title":"Impacts of bed topography resolution on sea-level rise projections from coupled subglacial hydrology and ice dynamics for Thwaites Glacier, Antarctica.","authors":"Shivani Ehrenfeucht, Christine Dow","doi":"10.1098/rsta.2024.0545","DOIUrl":"https://doi.org/10.1098/rsta.2024.0545","url":null,"abstract":"Ice-sheet models require explicit knowledge of the underlying bed. However, much remains unknown regarding the subglacial environment owing to difficulties associated with measuring it. Extensive radar surveys have been conducted across Antarctica, but the requirement of full-coverage bed topography for models necessitates interpolation over gaps between existing observations, which often span kilometres or more. Advances in modelling capabilities now allow for the application of dynamic coupling between subglacial hydrology and ice dynamics in models of Antarctica. While a bed resolution of approximately 1 km is recommended for modelling Antarctic ice dynamics, it has been suggested that finer spatial resolutions are necessary to resolve subglacial water flow. We use a coupled model configuration to generate projections of glacier evolution, including the subglacial hydrologic system, for Thwaites Glacier, West Antarctica, initiated with several different bed topographies. We find that the specific bed topography has a first-order control on accumulated mass loss, but that final sea-level rise does not scale with bed resolution. We also find that coupling between subglacial hydrology and ice dynamics results in faster mass loss. Our results underscore the importance of continued high-resolution topography mapping and suggest that current projections may underestimate uncertainty linked to unresolved bed features. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147777672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New high-resolution subglacial bed topography and coastal bathymetry of the Antarctic and Greenland Ice Sheets. 南极和格陵兰冰盖新的高分辨率冰下床地形和海岸水深测量。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2024.0538

Mathieu Morlighem, Raphaelle Charrassin, Niccolo Maffezzoli, Romain Millan, Helen Ockenden, Nicole-Jeanne Schlegel, Helene Seroussi, Mike Wood

{"title":"New high-resolution subglacial bed topography and coastal bathymetry of the Antarctic and Greenland Ice Sheets.","authors":"Mathieu Morlighem, Raphaelle Charrassin, Niccolo Maffezzoli, Romain Millan, Helen Ockenden, Nicole-Jeanne Schlegel, Helene Seroussi, Mike Wood","doi":"10.1098/rsta.2024.0538","DOIUrl":"https://doi.org/10.1098/rsta.2024.0538","url":null,"abstract":"The description of the bed topography under the Greenland and Antarctic Ice Sheets has greatly improved over the past decade through new field campaigns and mapping techniques, leading to BedMachine, a high-resolution gridded bed map widely used by the ice-sheet modelling community. Despite regular updates, BedMachine still suffers from uncertainty in ocean bathymetry and mapping artefacts in the ice-sheet interior. We describe here four recent improvements that address these limitations. In Greenland, we use ICESat-2 surface elevation time series to construct an ensemble of bed elevations that captures finer bed details. In Antarctica, we use Ice-Flow Perturbation Analysis in the interior. This approach provides an estimate of the bed topography using the surface expression of mesoscale bedforms. For periphery ice caps and the Antarctic Peninsula, we use the machine learning-based IceBoost approach, which is capable of inferring fine details based on surface features. Finally, over the continental shelf, we use a new gravity inversion product from the Antarctic Gravity Anomaly Grid, which provides significant refinements to the bathymetry around the entire ice sheet. Overall, these represent major improvements in the description of the bed topography and bathymetry for both ice sheets. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147777840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bed topography data gaps in the Antarctic Ice Sheet margin zone revealed by new analysis of Bedmap3 database for Antarctic RINGS. 南极环Bedmap3数据库新分析揭示的南极冰盖边缘带床地形数据缺口

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2025.0371

Kenichi Matsuoka, Calvin Shackleton

{"title":"Bed topography data gaps in the Antarctic Ice Sheet margin zone revealed by new analysis of Bedmap3 database for Antarctic RINGS.","authors":"Kenichi Matsuoka, Calvin Shackleton","doi":"10.1098/rsta.2025.0371","DOIUrl":"https://doi.org/10.1098/rsta.2025.0371","url":null,"abstract":"Accurate bed topography is critical for predicting Antarctica's future ice discharge and sea-level contribution, yet large portions of the coastal ice sheet remain poorly mapped. We assessed radar-derived ice-thickness data coverage along the ice-sheet margin zone, focusing on dynamically sensitive sectors, using a 0.5 km grid and distance-to-data metrics. The study area encompassed a 100 km buffer from a simplified grounding line, including fast-flowing ice and regions where ISMIP6 experiments project grounding-line retreat by 2100. After filtering for GPS-quality data, over 41 million Bedmap3 measurements were analysed. Coverage varies widely across the 27 GSFC drainage basins: rapidly changing regions such as Thwaites and Pine Island glaciers are well sampled, whereas Enderby Land, Oates Land and the eastern Antarctic Peninsula exhibit gaps of 40-100 km. Ice rises and rumples are broadly undersampled despite their role in ice-shelf stability. These results provide an initial prioritization of targets for future airborne and helicopter-borne surveys. This prioritization is based primarily on existing data distribution and will be further refined through SCAR's RINGS Action Group regional efforts, ultimately supporting the development of next-generation Bedmap products. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A community vision for next-generation bed mapping in Antarctica. 南极洲下一代地层测绘的社区愿景。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2025.0372

Kenichi Matsuoka, Robert G Bingham, Helen Millman, Martin Siegert

{"title":"A community vision for next-generation bed mapping in Antarctica.","authors":"Kenichi Matsuoka, Robert G Bingham, Helen Millman, Martin Siegert","doi":"10.1098/rsta.2025.0372","DOIUrl":"https://doi.org/10.1098/rsta.2025.0372","url":null,"abstract":"Antarctic bed mapping underpins our understanding of ice-sheet stability, grounding-line retreat and future sea-level rise. Detailed geomorphological and geophysical knowledge, integrated with geological characteristics, reveals long-term processes such as erosion, sediment transport to the ocean and contributions to global geochemical cycles. Despite major advances in radar surveys, large regions of the Antarctic Ice Sheet remain poorly constrained. A side meeting held on 8 May 2025, immediately after the Royal Society's Theo Murphy Meeting on Next Generation Ice-sheet Bed Measurements, gathered international experts to identify priorities for advancing coordinated surveys, data integration and open infrastructure. These discussions, timely as the community prepares for the fifth International Polar Year (IPY5; 2032-2033), emphasized harmonized survey design, closer integration with modelling and remote-sensing communities, improved data standards and archiving, and implementation of emerging technologies such as swath radar, drone and artificial intelligence-assisted data interpretations. Together, they highlight both the urgency and the opportunity to build an internationally coherent framework for next-generation Antarctic bed measurements. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2025.0088

Qian Ma, Tong Hao, Wenhao Luo, Tiantian Feng, Kenichi Matsuoka, Chen Lv, Jiaying Zhou

{"title":"Signal similarity-informed generative adversarial network for prediction of basal wetness conditions in Antarctica: a case study in the AGAP region.","authors":"Qian Ma, Tong Hao, Wenhao Luo, Tiantian Feng, Kenichi Matsuoka, Chen Lv, Jiaying Zhou","doi":"10.1098/rsta.2025.0088","DOIUrl":"https://doi.org/10.1098/rsta.2025.0088","url":null,"abstract":"Identifying basal wetness conditions beneath the Antarctic ice sheet is essential for understanding subglacial hydrology, basal traction and long-term ice dynamics. However, conventional reflectivity-wetness analysis methods face significant challenges, such as the reliance on inconsistent reflectivity thresholds and manually labelled training datasets. In this contribution, we propose a signal similarity-informed generative adversarial network (SSIGAN), an unsupervised anomaly detection framework, to predict and analyse the basal wetness conditions using focused radio-echo sounding data. Taking the AGAP region as a case study, the method reformulates the wetness classification as an anomaly detection problem, removing the need for labelled data. It extracts radar waveform similarity features to generate an anomaly score (R1), which is combined with an inverted geometrically corrected and normalized bed return power score (R2) to form a wetness score (R3) that enhances the classification separability. Validations are conducted through spatial comparison with existing inventoried subglacial lakes and consistency analysis at radar intersection zones. The results demonstrate that this method can reliably distinguish the transition between wet and dry basal interfaces, highlighting its potential for continental-wide mapping of basal wetness in Antarctica. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

What next for ice-sheet bed measurements? 冰盖床测量的下一步是什么？

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2025.0190

Helen Millman, Martin J Siegert, Richard B Alley, Christine F Dow

{"title":"What next for ice-sheet bed measurements?","authors":"Helen Millman, Martin J Siegert, Richard B Alley, Christine F Dow","doi":"10.1098/rsta.2025.0190","DOIUrl":"https://doi.org/10.1098/rsta.2025.0190","url":null,"abstract":"Subglacial topography and basal conditions form critical controls on ice-sheet dynamics and ice-flow pathways. These controls modulate basal shear stress, affect grounding-line stability and allow the potential for marine ice-sheet instability. Deep troughs and reverse slopes facilitate rapid retreat driven by ocean warming, while topographic ridges and bumps can anchor ice margins. However, substantial data gaps in ice-sheet bed measurements limit the accuracy of sea-level rise projections from numerical ice-sheet models that require such information as inputs. Interpolation techniques often smooth over key features, creating digital elevation models (DEMs) that do not replicate 'real' glacierized systems. This causes uncertainty in simulations of ice-sheet evolution. Advances in physics-informed methods, which use surface velocity and mass conservation to infer bed elevation, have improved reconstructions of bed topography. Nonetheless, important details that characterize glacierized surfaces remain to be resolved in the DEMs and bed topography grids that models rely on. Future priorities to improve these data products involve dense, targeted surveys in key areas such as grounding zones. Machine learning (ML) offers promising tools for optimizing interpolation, prioritizing survey targets and planning future surveys. As ice-sheet model projections extend to 2300 CE and beyond, survey strategies must anticipate migrating grounding lines. Automation and repeat observations, including swath radar and unmanned aerial vehicle (UAV)-based campaigns, will be vital for maintaining up-to-date, high-resolution bed datasets. Ultimately, significant advancements in subglacial mapping are possible within the next 10-20 years, which could greatly improve model accuracy and better inform sea-level rise mitigation and adaptation strategies. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthetic bed topographies for Antarctica and their utility in ice sheet modelling. 南极洲的合成床地形及其在冰盖模拟中的应用。

IF 3.7 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2026-04-23 DOI: 10.1098/rsta.2024.0537

Felicity S McCormack, Tobias Stål, Niya Shao, Emma MacKie, Ana Fabela Hinojosa, Mareen Lösing, Jason Roberts, Shivani Ehrenfeucht, Christine Dow

{"title":"Synthetic bed topographies for Antarctica and their utility in ice sheet modelling.","authors":"Felicity S McCormack, Tobias Stål, Niya Shao, Emma MacKie, Ana Fabela Hinojosa, Mareen Lösing, Jason Roberts, Shivani Ehrenfeucht, Christine Dow","doi":"10.1098/rsta.2024.0537","DOIUrl":"https://doi.org/10.1098/rsta.2024.0537","url":null,"abstract":"Bed topography is a key control on the evolution of the Antarctic Ice Sheet, influencing ice flow, grounding line retreat and the rate and timing of ice mass loss. To assess the sensitivity of ice sheet evolution to bed variability in ice sheet models, synthetic gridded bed topography datasets are often used. Here, we review methods commonly used to generate synthetic beds, their associated uncertainties and the influence of the approach on the characteristics of the resulting bed. Using the Aurora Subglacial Basin in East Antarctica as a case study, we evaluate the impact of five synthetic bed generation methods on projected ice mass loss under a high emission scenario. Sea-level rise estimates vary by up to 11% (SSP5-8.5 forcing scenario) and 32% (RCP2.6) at 2300 CE when basal friction coefficients from the friction law are optimized for each bed, and by up to 23% (SSP5-8.5) and 51% (RCP2.6) at 2300 CE when using non-optimized coefficients. Our results highlight the importance of relatively small bed variations on the timing and extent of grounding line retreat and the need for process-informed representation of the basal friction in decadal- to centennial-scale sea-level projections. This article is part of the Theo Murphy meeting issue 'Next generation ice-sheet bed measurements'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"384 2319","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147778059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0