Robert J. Arthern
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View article: Ocean tides trigger ice shelf rift growth and calving
Ocean tides trigger ice shelf rift growth and calving Open
Tabular iceberg calving reduces ice-shelf extent, affecting ocean circulation and ice-sheet stability. Here we present detailed observations of a rift on the Brunt Ice Shelf, East Antarctica, from 2017-2023 and its behaviour in the lead up…
View article: Quantifying and attributing the role of anthropogenic climate change in industrial-era retreat of Pine Island Glacier
Quantifying and attributing the role of anthropogenic climate change in industrial-era retreat of Pine Island Glacier Open
The West Antarctic Ice Sheet (WAIS) has undergone rapid change over the satellite era, characterized by significant thinning, grounding line retreat, and mass loss. Over one-third of the ice loss from this region is from Pine Island Glacie…
View article: The Antarctic Ice Sheet sliding law inferred from seismic observations
The Antarctic Ice Sheet sliding law inferred from seismic observations Open
The response of the Antarctic ice sheet to climate change and its contribution to sea level under different emission scenarios are subject to large uncertainties. A key uncertainty is the slipperiness at the ice sheet base and how it is pa…
View article: Calculations of extreme sea level rise scenarios are strongly dependent on ice sheet model resolution
Calculations of extreme sea level rise scenarios are strongly dependent on ice sheet model resolution Open
The West Antarctic Ice Sheet (WAIS) is losing ice and its annual contribution to sea level is increasing. The future behaviour of WAIS will impact societies worldwide, yet deep uncertainty remains in the expected rate of ice loss. High-imp…
View article: Author Correction: A framework for estimating the anthropogenic part of Antarctica’s sea level contribution in a synthetic setting
Author Correction: A framework for estimating the anthropogenic part of Antarctica’s sea level contribution in a synthetic setting Open
View article: Coupled ice–ocean interactions during future retreat of West Antarctic ice streams in the Amundsen Sea sector
Coupled ice–ocean interactions during future retreat of West Antarctic ice streams in the Amundsen Sea sector Open
The Amundsen Sea sector has some of the fastest-thinning ice shelves in Antarctica, caused by high, ocean-driven basal melt rates, which can lead to increased ice streamflow, causing increased sea level rise (SLR) contributions. In this st…
View article: WAVI.jl: Ice Sheet Modelling in Julia
WAVI.jl: Ice Sheet Modelling in Julia Open
Ice sheet models are used to improve our understanding of the past, present, and future
\nevolution of ice sheets. To do so, they solve the equations describing the flow of ice when
\nforced by other climate elements, particularly the atmo…
View article: A framework for estimating the anthropogenic part of Antarctica’s sea level contribution in a synthetic setting
A framework for estimating the anthropogenic part of Antarctica’s sea level contribution in a synthetic setting Open
View article: A viscoelastic phase-field model for iceberg calving
A viscoelastic phase-field model for iceberg calving Open
Iceberg calving accounts for around half of the ice lost annually from Antarctica, but realistic representation of fracture and calving in large-scale ice sheet models remains a major unsolved problem in glaciology. We present a new phase-…
View article: Is climate change responsible for recent retreat of the Pine Island Glacier in West Antarctica?
Is climate change responsible for recent retreat of the Pine Island Glacier in West Antarctica? Open
Pine Island Glacier is a fast flowing ice stream in West Antarctica. At present, it is rapidly thinning and retreating, and has been since at least the 1970s, when satellite records began. Sediment records indicate that this retreat was in…
View article: Calculating exposure to extreme sea level risk will require high resolution ice sheet models
Calculating exposure to extreme sea level risk will require high resolution ice sheet models Open
The West Antarctic Ice Sheet (WAIS) is losing ice and its annual contribution to sea level is increasing. The future behaviour of WAIS will impact societies worldwide, yet deep uncertainty remains in the expected rate of ice loss. High imp…
View article: Calculating exposure to extreme sea level risk will require high resolution ice sheet models
Calculating exposure to extreme sea level risk will require high resolution ice sheet models Open
The West Antarctic Ice Sheet (WAIS) is losing ice and its annual contribution to sea level is increasing. The future behaviour of WAIS will impact societies worldwide, yet deep uncertainty remains in the expected rate of ice loss. High imp…
View article: Comment on tc-2023-77
Comment on tc-2023-77 Open
Abstract. The Amundsen Sea sector has some of the fastest-thinning ice shelves in Antarctica, caused by high, ocean-driven basal melt rates, which can lead to increased ice stream flow, causing increased sea level rise (SL…
View article: Multi-fidelity experimental design for ice-sheet simulation
Multi-fidelity experimental design for ice-sheet simulation Open
Computer simulations are becoming an essential tool in many scientific fields from molecular dynamics to aeronautics. In glaciology, future predictions of sea level change require input from ice sheet models. Due to uncertainties in the fo…
View article: Comment on tc-2023-77
Comment on tc-2023-77 Open
Abstract. The Amundsen Sea sector has some of the fastest-thinning ice shelves in Antarctica, caused by high, ocean-driven basal melt rates, which can lead to increased ice stream flow, causing increased sea level rise (SL…
View article: A framework for estimating the anthropogenic part of Antarctica’s sea level contribution in a synthetic setting
A framework for estimating the anthropogenic part of Antarctica’s sea level contribution in a synthetic setting Open
The relative contributions of anthropogenic climate change and internal variability in sea level rise from the West Antarctic Ice Sheet are yet to be determined. Even the way to address this question is not yet clear, since these two are l…
View article: Highly variable friction and slip observed at Antarctic ice stream bed
Highly variable friction and slip observed at Antarctic ice stream bed Open
The slip of glaciers over the underlying bed is the dominant mechanism governing the migration of ice from land into the oceans, with accelerating slip contributing to sea-level rise. Yet glacier slip remains poorly understood, and observa…
View article: A viscoelastic phase-field model for iceberg calving
A viscoelastic phase-field model for iceberg calving Open
Iceberg calving accounts for around half of the ice lost annually from Antarctica, but realistic representation of fracture and calving in large-scale ice sheet models remains a major unsolved problem in glaciology. We present a new phase-…
View article: Coupled ice/ocean interactions during the future retreat of West Antarctic ice streams
Coupled ice/ocean interactions during the future retreat of West Antarctic ice streams Open
The Amundsen Sea sector has some of the fastest-thinning ice shelves in Antarctica, caused by high, ocean-driven basal melt rates, which can lead to increased ice stream flow, causing increased sea level rise (SLR) contributions. In this s…
View article: Fully synchronous coupled ice/ocean modelling of future changes in the Amundsen Sea Sector
Fully synchronous coupled ice/ocean modelling of future changes in the Amundsen Sea Sector Open
The Amundsen Sea Sector has some of the highest thinning rates of ice shelves in Antarctica, thought to be driven by high, but interannually variable, ocean driven melt rates. This thinning can lead to increased ice flow speeds, eventually…
View article: Taxonomy of Cliff Failure Criteria: Phase Field Modelling and Parallels with Other Models
Taxonomy of Cliff Failure Criteria: Phase Field Modelling and Parallels with Other Models Open
Ice loss from glaciers and ice sheets is the largest contributor to sea level rise. Damaged ice is central to the stability of the Antarctic Ice Sheet and calving of tabular icebergs from ice shelves accounts for more than half of all the …
View article: (How) can we attribute West Antarctic ice mass loss to climate change?
(How) can we attribute West Antarctic ice mass loss to climate change? Open
The West Antarctic Ice Sheet is thinning and losing mass at an accelerating rate. However these changes have yet to be formally attributed to anthropogenic climate change, primarily because of the potential for positive feedbacks on ice sh…
View article: Suppressed basal melting in the eastern Thwaites Glacier grounding zone
Suppressed basal melting in the eastern Thwaites Glacier grounding zone Open
View article: The Impact of Basal Roughness on Inland Thwaites Glacier Sliding
The Impact of Basal Roughness on Inland Thwaites Glacier Sliding Open
Swath radar technology enables three‐dimensional mapping of modern glacier beds over large areas at resolutions that are higher than those typically used in ice‐flow models. These data may enable new understanding of processes at the ice‐b…
View article: Phase field viscoelastic fracture models for ice sheet dynamics
Phase field viscoelastic fracture models for ice sheet dynamics Open
<p>Antarctic ice sheets grounded under the sea level can break apart if the ice cliffs at the edge of ice shelves collapse under their own weight. The process is known as the marine ice cliff instability and could lead to a rapid ret…
View article: Asymptotic analysis of subglacial plumes in stratified environments
Asymptotic analysis of subglacial plumes in stratified environments Open
Accurate predictions of basal melt rates on ice shelves are necessary for precise projections of the future behaviour of ice sheets. The computational expense associated with completely resolving the cavity circulation using an ocean model…
View article: Friction and slip measured at the bed of an Antarctic ice stream
Friction and slip measured at the bed of an Antarctic ice stream Open
The slip of glaciers over the underlying bed is the dominant mechanism governing the migration of ice from land into the oceans, contributing to sea-level rise. Yet glacier slip remains poorly understood or constrained by observations. Her…
View article: Breaking the Ice: Identifying Hydraulically Forced Crevassing
Breaking the Ice: Identifying Hydraulically Forced Crevassing Open
Hydraulically forced crevassing is thought to reduce the stability of ice shelves and ice sheets, affecting structural integrity and providing pathways for surface meltwater to the bed. It can cause ice shelves to collapse and ice sheets t…
View article: Breaking the ice: Identifying hydraulically-forced crevassing
Breaking the ice: Identifying hydraulically-forced crevassing Open
Hydraulically-forced crevassing is thought to reduce the stability of ice shelves and ice sheets, affecting structural integrity and providing pathways for surface meltwater to the bed. It can cause ice shelves to collapse and ice sheets t…
View article: Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing
Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing Open
The geometry of the sea floor immediately beyond Antarctica's marine-terminating glaciers is a fundamental control on warm-water routing, but it also describes former topographic pinning points that have been important for ice-shelf buttre…