Colin Meyer
YOU?
Author Swipe
View article: Influence of water extraction on subglacial hydrology and glacier velocity
Influence of water extraction on subglacial hydrology and glacier velocity Open
Subglacial water modulates glacier velocity across a wide range of space and time scales by influencing friction at the glacier bed. Observations show ice acceleration due to supraglacial lake drainage and water draining through moulins, w…
View article: Nonlinear longitudinal stress coupling in glacier and ice sheet flow
Nonlinear longitudinal stress coupling in glacier and ice sheet flow Open
The Greenland and Antarctic Ice sheets exhibit high variability in flow speed, over multiple orders of magnitude. Faster flow in ice streams, marine terminating glaciers, and ice shelves is described by the Shallow Shelf/Shelfy-Stream Appr…
View article: As Above, Not So Below: Ion Fractionation in Planetary Analog Ices
As Above, Not So Below: Ion Fractionation in Planetary Analog Ices Open
Introduction: There is a growing consensus that ocean-derived impurities, and particularly salts, play a key role in the geophysical evolution and habitability of planetary ice shells [1]. This is bolstered by several observations includin…
View article: Implications of shallow-shell models for topographic relaxation on icy satellites
Implications of shallow-shell models for topographic relaxation on icy satellites Open
Icy satellites host topography at many length scales, from rifts and craters on the small end to equatorial-pole shell thickness differences that are comparable to these bodies' circumference. The rate of topographic evolution depends on t…
View article: Tidal flexure reveals effective elasticity in grounding zones on the Ross Ice Shelf
Tidal flexure reveals effective elasticity in grounding zones on the Ross Ice Shelf Open
The grounding zones of Antarctic ice shelves are among the continent’s most dynamic regions, where floating ice shelves buttress grounded upstream ice and tidal forcing drives cyclic flexure at the ice-ocean-bed interface. We use ICESat-2 …
View article: Modelling sediment compaction beneath ice lenses during frost heave
Modelling sediment compaction beneath ice lenses during frost heave Open
Frost heave occurs when the ground swells during freezing conditions due to the growth of ice lenses in the subsurface. The mechanics of ice-infiltrated sediment, or frozen fringe, influences the formation and evolution of ice lenses. As t…
View article: Thermal channelization of suprapermafrost flows
Thermal channelization of suprapermafrost flows Open
On many frozen hillslopes, subsurface water above permafrost is routed through regularly spaced, linear features known as water tracks. We test whether water tracks form through thermal channelization, where heat from viscous dissipation i…
View article: Subtemperate sliding reduces period of ice stream variability in a simple model
Subtemperate sliding reduces period of ice stream variability in a simple model Open
Understanding the formation and evolution of fast flowing ice streams is essential to projecting the centennial-scale response of ice sheets to climate forcings. Slow flowing glaciers or stagnant ice streams can slide at low velocities ove…
View article: A Potential Mushy Source for the Geysers of Enceladus and Other Icy Satellites
A Potential Mushy Source for the Geysers of Enceladus and Other Icy Satellites Open
Enceladus is a target for astrobiology due to the plume ejecta measured by the Cassini spacecraft and the inferred subsurface ocean that could be the source of the geysers. Here we explore an alternative where shear heating along tiger str…
View article: Simulating Seasonal Evolution of Subglacial Hydrology at a Surging Glacier in the Karakoram
Simulating Seasonal Evolution of Subglacial Hydrology at a Surging Glacier in the Karakoram Open
Glacier motion, retreat, and glacier hazards such as surges and glacial lake outburst floods (GLOFs) are likely underpinned by subglacial hydrology. Recent advances in subglacial hydrological modeling allow us to shed light on subglacial p…
View article: Simulating seasonal evolution of subglacial hydrology at a surging glacier in the Karakoram
Simulating seasonal evolution of subglacial hydrology at a surging glacier in the Karakoram Open
Glacier motion, retreat and glacier hazards such as surges and glacial lake outburst floods (GLOFs) are likely underpinned by subglacial hydrology. Recent advances in subglacial hydrological modeling allow us to shed light on subglacial pr…
View article: FirnLearn: A neural network-based approach to firn density modeling in Antarctica
FirnLearn: A neural network-based approach to firn density modeling in Antarctica Open
Understanding firn densification is essential for interpreting ice core records, predicting ice sheet mass balance, elevation changes and future sea-level rise. Current models of firn densification on the Antarctic ice sheet (AIS), such as…
View article: Subtemperate sliding reduces periodicity of ice stream temporal variability in a simple model
Subtemperate sliding reduces periodicity of ice stream temporal variability in a simple model Open
Understanding the formation and evolution of fast flowing ice streams is essential to projecting the response of ice sheets to climate forcings. Slow-flowing or stagnant ice streams can slide at low velocities over a bed that is below the …
View article: Predicting the Onset of Subglacial Drainage Channels
Predicting the Onset of Subglacial Drainage Channels Open
The sliding speed of glaciers depends strongly on the water pressure at the ice‐sediment interface, which is controlled by the efficiency of water transport through a subglacial hydrological system. The least efficient component of the sys…
View article: Measurement of snowpack density, grain size, and black carbon concentration using time-domain diffuse optics
Measurement of snowpack density, grain size, and black carbon concentration using time-domain diffuse optics Open
Diffuse optical spectroscopy (DOS) techniques characterize scattering media by examining their optical response to laser illumination. Time-domain DOS methods involve illuminating the medium with a laser pulse and using a fast photodetecto…
View article: Mechanisms for upstream migration of firn aquifer drainage: preliminary observations from Helheim Glacier, Greenland
Mechanisms for upstream migration of firn aquifer drainage: preliminary observations from Helheim Glacier, Greenland Open
Surface meltwater can influence subglacial hydrology and ice dynamics if it reaches ice sheet's base. Firn aquifers store meltwater and drain into wide crevasses marking the aquifer's downstream boundary, indicating water from firn aquifer…
View article: FirnLearn: A Neural Network based approach to Firn Densification Modeling for Antarctica
FirnLearn: A Neural Network based approach to Firn Densification Modeling for Antarctica Open
Understanding firn densification is essential for interpreting ice core records, predicting ice sheet mass balance, elevation changes, and future sea-level rise. Current models of firn densification on the Antarctic Ice Sheet (AIS) are sem…
View article: Velocity of Greenland's Helheim Glacier Controlled Both by Terminus Effects and Subglacial Hydrology With Distinct Realms of Influence
Velocity of Greenland's Helheim Glacier Controlled Both by Terminus Effects and Subglacial Hydrology With Distinct Realms of Influence Open
Two outstanding questions for the future of the Greenland Ice Sheet are (a) how enhanced meltwater draining beneath the ice will impact the behavior of large tidewater glaciers, and (b) to what extent tidewater glacier velocity is driven b…
View article: Modeling sediment compaction beneath ice lenses during frost heave
Modeling sediment compaction beneath ice lenses during frost heave Open
Frost heave occurs when the ground swells during freezing conditions due to the growth of ice lenses in the subsurface. The mechanics of ice-infiltrated sediment, or frozen fringe, influences the formation and evolution of ice lenses. As t…
View article: Mechanisms for upstream migration of firn aquifer drainage: preliminary observations of Helheim Glacier, Greenland
Mechanisms for upstream migration of firn aquifer drainage: preliminary observations of Helheim Glacier, Greenland Open
Surface meltwater can influence subglacial hydrology and ice dynamics if it reaches the ice sheet’s base. Firn aquifers store meltwater and drain into wide crevasses marking the aquifer’s downstream boundary, indicating water from firn aqu…
View article: Presence of Frozen Fringe Impacts Soft‐Bedded Slip Relationship
Presence of Frozen Fringe Impacts Soft‐Bedded Slip Relationship Open
Glaciers and ice streams flowing over sediment beds commonly have a layer of ice‐rich debris adhered to their base, known as a “frozen fringe,” but its impact on basal friction is unknown. We simulated basal slip over granular beds with a …
View article: Subtemperate regelation exhibits power-law premelting
Subtemperate regelation exhibits power-law premelting Open
Wire regelation is a common tabletop demonstration of the pressure-dependence of the ice melting temperature where a loaded wire moves from top to bottom through a block of ice, yet leaves the block intact. With the background temperature …
View article: Predicting the onset of subglacial drainage channels
Predicting the onset of subglacial drainage channels Open
The sliding speed of glaciers depends strongly on the water pressure at the ice-sediment interface, which is controlled by the efficiency of water transport through a subglacial hydrological system. The least efficient component of the sys…
View article: Helheim velocity controlled both by terminus effects and subglacial hydrology with distinct realms of influence
Helheim velocity controlled both by terminus effects and subglacial hydrology with distinct realms of influence Open
Description of SHAKTI-ISSM model output files contained in this archive: Helheim_SHAKTI_N_2_1yr_H10.mat -- Winter base state spin-up simulation, final state serves as initial conditions for seasonal simulations Helheim_big_seasonal_low.mat…
View article: Simulating Subglacial Hydrology: Insights into the Triggers of Surges and GLOFs
Simulating Subglacial Hydrology: Insights into the Triggers of Surges and GLOFs Open
The snowpack and glaciers of the Himalaya-Karakoram range feed several major river systems in Asia which provide water to over one billion people. Glacial retreat, glacial lake outburst flooding (GLOFs), and glacial ice mass balance are al…
View article: Permafrost extent sets drainage density in the Arctic
Permafrost extent sets drainage density in the Arctic Open
Amplified warming of high latitudes and rapid thaw of frozen ground threaten permafrost carbon stocks. The presence of permafrost modulates water infiltration and flow, as well as sediment transport, on soil-mantled slopes, influencing the…