Ian Hewitt
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View article: A dynamical network model for melt ponds on sea ice
A dynamical network model for melt ponds on sea ice Open
View article: Subglacial hydrology regulates oscillations in marine ice streams
Subglacial hydrology regulates oscillations in marine ice streams Open
Marine ice stream dynamics are sensitive to conditions at the grounding line and basal shear stress. Variations in subglacial hydrology have been implicated in ice stream speed-up and shutdown. To investigate the interplay between marine i…
View article: Poro-viscoelastic tidal heating of Io
Poro-viscoelastic tidal heating of Io Open
Io’s tidally driven global volcanism indicates widespread partial melting in its mantle. How this melt participates in the interior dynamics and, in particular, the role it plays in tidal dissipation, is poorly understood. We model Io’s ti…
View article: Groundwater dynamics beneath a marine ice sheet
Groundwater dynamics beneath a marine ice sheet Open
Sedimentary basins beneath many Antarctic ice streams host substantial volumes of groundwater, which can be exchanged with a “shallow” subglacial hydrological system of till and channelised water. This exchange contributes substantially to…
View article: Calving Laws and where to find them
Calving Laws and where to find them Open
View article: Comment on egusphere-2024-3610
Comment on egusphere-2024-3610 Open
View article: Subglacial hydrology regulates oscillations in marine ice streams
Subglacial hydrology regulates oscillations in marine ice streams Open
Marine ice stream dynamics are sensitive to conditions at the grounding line and basal shear stress; variations in subglacial hydrology have been implicated in ice stream speed-up and shutdown. To investigate the interplay between marine i…
View article: Optimal operation of floating flywheel energy storage under fluctuating electricity prices
Optimal operation of floating flywheel energy storage under fluctuating electricity prices Open
View article: Where do we want the glaciological community to be in 2073? Equality, diversity and inclusion challenges and visions from the 2023 Karthaus Summer School
Where do we want the glaciological community to be in 2073? Equality, diversity and inclusion challenges and visions from the 2023 Karthaus Summer School Open
Despite the increased awareness and action towards Equality, Diversity and Inclusion (EDI), the glaciological community still experiences and perpetuates examples of exclusionary and discriminatory behavior. We here discuss the challenges …
View article: Optimal operation of floating flywheel energy storage under fluctuating electricity prices
Optimal operation of floating flywheel energy storage under fluctuating electricity prices Open
View article: Groundwater dynamics beneath a marine ice sheet
Groundwater dynamics beneath a marine ice sheet Open
Sedimentary basins beneath many Antarctic ice streams host substantial volumes of groundwater, which can be exchanged with a “shallow” subglacial hydrological system of till and channelised water. This exchange contributes substantially to…
View article: Modelling the evolution of an ice sheet’s weathering crust
Modelling the evolution of an ice sheet’s weathering crust Open
The weathering crust is a layer of porous ice that can form at the surface of an ice sheet. It grows and decays in response changing weather and climate conditions, affecting the albedo, the melt rate and the transport of meltwater across …
View article: Groundwater dynamics beneath a marine ice sheet
Groundwater dynamics beneath a marine ice sheet Open
Sedimentary basins beneath many Antarctic ice streams host substantial volumes of groundwater, which can be exchanged with a "shallow" subglacial hydrological system of till and channelised water. This exchange contributes substantially to…
View article: Author Correction: Tipping point in ice-sheet grounding-zone melting due to ocean water intrusion
Author Correction: Tipping point in ice-sheet grounding-zone melting due to ocean water intrusion Open
View article: Tipping point in ice-sheet grounding-zone melting due to ocean water intrusion
Tipping point in ice-sheet grounding-zone melting due to ocean water intrusion Open
Marine ice sheets are highly sensitive to submarine melting in their grounding zones, where they transition between grounded and floating ice. Recently published studies of the complex hydrography of grounding zones suggest that warm ocean…
View article: Tidal Forcing in Icy‐Satellite Oceans Drives Mean Circulation and Ice‐Shell Torques
Tidal Forcing in Icy‐Satellite Oceans Drives Mean Circulation and Ice‐Shell Torques Open
Tidal forces generate time‐varying currents in bodies with fluid layers, such as the icy ocean moons of the outer solar system. The expectation has been that tidal currents are periodic—they average to zero over a forcing period—so that th…
View article: Modelling the evolution of an ice sheet's weathering crust
Modelling the evolution of an ice sheet's weathering crust Open
The weathering crust is a layer of porous ice that can form at the surface of an ice sheet. It grows and decays in response changing weather and climate conditions, affecting the albedo, the melt rate, and the transport of meltwater across…
View article: Modelling the evolution of the weathering crust
Modelling the evolution of the weathering crust Open
The weathering crust is a porous layer of ice found at an ice sheet surface, formed by shortwave radiation penetrating below the surface and causing internal melting. It is a dynamic hydrological system that acts to transport meltwater, im…
View article: Evolution of marine ice sheets with bed sedimentation
Evolution of marine ice sheets with bed sedimentation Open
Marine ice sheets terminate in the ocean where they form floating ice shelves or calve icebergs. They can significantly influence sea level because of the potential for rapid transfer of grounded ice (with thickness greater than floa…
View article: Tidal Dissipation in a Partially Molten Asthenosphere on Io
Tidal Dissipation in a Partially Molten Asthenosphere on Io Open
The rocky Jovian moon, Io, exhibits global volcanism that is driven by heat dissipated by tidal deformation. The large rate of heat exported by this volcanism, in conjunction with evidence in the form of magnetic induction, suggests that t…
View article: Soft matter physics of the ground beneath our feet
Soft matter physics of the ground beneath our feet Open
Earth's surface materials constitute the basis for life and natural resources. Most of these materials can be catergorized as soft matter, yet a general physical understanding of the ground beneath our feet is still lacking. Here we provid…
View article: Soft matter physics of the ground beneath our feet
Soft matter physics of the ground beneath our feet Open
Inspired by presentations by the authors during a workshop organized at the Princeton Center for Theoretical Science (PCTS) in January 2022, we present a perspective on some of the outstanding questions related to the "physics of the groun…
View article: Tipping point behaviour of submarine melting in ice-sheet grounding zones
Tipping point behaviour of submarine melting in ice-sheet grounding zones Open
Marine ice sheets are highly sensitive to submarine melting in their grounding zones, where they transition between grounded and floating ice. Recently published studies of the complex hydrography of grounding zones suggest that warm ocean…
View article: A model of the weathering crust and microbial activity on an ice-sheet surface
A model of the weathering crust and microbial activity on an ice-sheet surface Open
Shortwave radiation penetrating beneath an ice-sheet surface can cause internal melting and the formation of a near-surface porous layer known as the weathering crust, a dynamic hydrological system that provides home to impurities and micr…
View article: Tipping point behaviour of submarine melting at ice sheet grounding zones
Tipping point behaviour of submarine melting at ice sheet grounding zones Open
Ice sheets are highly sensitive to melting in their grounding zones, where they transition from grounded ice to floating. Recent models of the interaction between warm salty ocean water and cold fresh subglacial discharge in the grounding …
View article: A model of the weathering crust and microbial activity on an ice-sheet surface
A model of the weathering crust and microbial activity on an ice-sheet surface Open
Shortwave radiation penetrating beneath an ice-sheet surface can cause internal melting and the formation of a near-surface porous layer known as the weathering crust, a dynamic hydrological system that provides home to impurities and micr…
View article: Bendocapillary instability of liquid in a flexible-walled channel
Bendocapillary instability of liquid in a flexible-walled channel Open
We study the bendocapillary instability of a liquid droplet that part fills a flexible walled channel. Inspired by experiments in which a periodic pattern emerges as droplets of liquid are condensed slowly into deformable microchannels, we…
View article: Topological Data Analysis Detects Percolation Thresholds in Arctic Melt-Pond Evolution
Topological Data Analysis Detects Percolation Thresholds in Arctic Melt-Pond Evolution Open
During the summer melt period, ponds form on the surface of Arctic sea ice as it melts, with important consequences for ice evolution and marine ecology. Due to the ice-albedo feedback, these melt ponds experience uneven heat absorption, a…
View article: Comment on egusphere-2022-1086
Comment on egusphere-2022-1086 Open
Abstract. Shortwave radiation penetrating beneath an ice-sheet surface can cause internal melting and the formation of a near-surface porous layer known as the weathering crust, a dynamic hydrological system that provides …
View article: A model of the weathering crust and microbial activity on an ice-sheet surface
A model of the weathering crust and microbial activity on an ice-sheet surface Open
Shortwave radiation penetrating beneath an ice-sheet surface can cause internal melting and the formation of a near-surface porous layer known as the weathering crust, a dynamic hydrological system that provides home to impurities and micr…