Matthew J. Hoffman
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View article: Disentangling uncertainty in ISMIP6 Antarctic sub-shelf melting and 2300 sea level rise projections
Disentangling uncertainty in ISMIP6 Antarctic sub-shelf melting and 2300 sea level rise projections Open
Ocean-driven ice shelf melting is a major contributor of present and future ice loss from the Antarctic Ice Sheet. In the Ice Sheet Model Intercomparison Project (ISMIP6) Antarctic 2300 projections, sea level rise varies widely, from -0.6 …
View article: Supplementary material to "Disentangling uncertainty in ISMIP6 Antarctic sub-shelf melting and 2300 sea level rise projections"
Supplementary material to "Disentangling uncertainty in ISMIP6 Antarctic sub-shelf melting and 2300 sea level rise projections" Open
View article: Subglacial Discharge Effects on Antarctic Ice‐Shelf Basal Melt and the Southern Ocean in a Global, Coupled Ocean—Sea‐Ice Model
Subglacial Discharge Effects on Antarctic Ice‐Shelf Basal Melt and the Southern Ocean in a Global, Coupled Ocean—Sea‐Ice Model Open
Subglacial freshwater from beneath Antarctica enters the ocean at depth, enhancing ice‐shelf melting and affecting Southern Ocean properties. To study these effects in an Antarctic‐wide context, we use a continental‐scale subglacial hydrol…
View article: Evolution of the Antarctic Ice Sheet from 2000–2300 and beyond: model sensitivity and uncertainty analysis using MPAS-Albany Land Ice
Evolution of the Antarctic Ice Sheet from 2000–2300 and beyond: model sensitivity and uncertainty analysis using MPAS-Albany Land Ice Open
We present a description of the Antarctic Ice Sheet model configuration submitted to the ISMIP6-Antarctica-2300 experiment using the MPAS-Albany Land Ice model, along with three new sets of simulations: (1) a set of extended simulations to…
View article: Computationally efficient subglacial drainage modelling using Gaussian process emulators: GlaDS-GP v1.0
Computationally efficient subglacial drainage modelling using Gaussian process emulators: GlaDS-GP v1.0 Open
Subglacial drainage models represent water flow at the ice–bed interface through coupled distributed and channelized systems to determine water pressure, discharge, and drainage system geometry. While they are used to understand processes …
View article: Subglacial discharge effects on Antarctic ice-shelf basal melt and the Southern Ocean in a global, coupled ocean–sea-ice model
Subglacial discharge effects on Antarctic ice-shelf basal melt and the Southern Ocean in a global, coupled ocean–sea-ice model Open
View article: Emulation With Uncertainty Quantification of Regional Sea‐Level Change Caused by the Antarctic Ice Sheet
Emulation With Uncertainty Quantification of Regional Sea‐Level Change Caused by the Antarctic Ice Sheet Open
Projecting regional sea‐level change under various climate‐change scenarios typically involves running forward simulations of the Earth's gravitational, rotational and deformational (GRD) response to ice‐mass change, which requires substan…
View article: An evaluation of multi-fidelity methods for quantifying uncertainty in projections of ice-sheet mass change
An evaluation of multi-fidelity methods for quantifying uncertainty in projections of ice-sheet mass change Open
This study investigated the computational benefits of using multi-fidelity statistical estimation (MFSE) algorithms to quantify uncertainty in the mass change of Humboldt Glacier, Greenland, between 2007 and 2100 using a single climate cha…
View article: Subglacial discharge effects on basal melting of a rotating, idealized ice shelf
Subglacial discharge effects on basal melting of a rotating, idealized ice shelf Open
When subglacial meltwater is discharged into the ocean at the grounding line, it acts as a source of buoyancy, enhancing flow speeds along the ice base that result in higher basal melt rates. The effects of subglacial discharge have been w…
View article: Emulator-based Bayesian calibration of a subglacial drainage model
Emulator-based Bayesian calibration of a subglacial drainage model Open
Subglacial drainage models, often motivated by the relationship between hydrology and ice flow, sensitively depend on numerous unconstrained parameters. We explore using borehole water-pressure timeseries to calibrate the uncertain paramet…
View article: Probabilistic projections of the Amery Ice Shelf catchment, Antarctica, under conditions of high ice-shelf basal melt
Probabilistic projections of the Amery Ice Shelf catchment, Antarctica, under conditions of high ice-shelf basal melt Open
Antarctica's Lambert Glacier drains about one-sixth of the ice from the East Antarctic Ice Sheet and is considered stable due to the strong buttressing provided by the Amery Ice Shelf. While previous projections of the sea-level contributi…
View article: Computationally efficient subglacial drainage modeling using Gaussian Process emulators: GlaDS-GP v1.0
Computationally efficient subglacial drainage modeling using Gaussian Process emulators: GlaDS-GP v1.0 Open
View article: Framework for Antarctic System Science in E3SM Overview
Framework for Antarctic System Science in E3SM Overview Open
View article: Evolution of the Antarctic Ice Sheet Over the Next Three Centuries From an ISMIP6 Model Ensemble
Evolution of the Antarctic Ice Sheet Over the Next Three Centuries From an ISMIP6 Model Ensemble Open
The Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6) is the primary effort of CMIP6 (Coupled Model Intercomparison Project–Phase 6) focusing on ice sheets, designed to provide an ensemble of process‐based projections of the ice‐s…
View article: Subglacial discharge effects on basal melting of a rotating, idealized ice shelf
Subglacial discharge effects on basal melting of a rotating, idealized ice shelf Open
When subglacial meltwater is discharged into the ocean at the grounding line, it acts as a source of buoyancy, enhancing flow speeds along the ice base that result in higher basal melt rates. The effects of subglacial discharge have been w…
View article: An evaluation of multi-fidelity methods for quantifying uncertainty in projections of ice-sheet mass-change
An evaluation of multi-fidelity methods for quantifying uncertainty in projections of ice-sheet mass-change Open
This study investigated the computational benefits of using multi-fidelity uncertainty quantification (MFUQ) algorithms to quantify uncertainty in the mass change of Humboldt Glacier, Greenland, between 2007 and 2100 using a single climate…
View article: BER Supported Earth System Modeling Activities at LANL, June 2024 [Slides]
BER Supported Earth System Modeling Activities at LANL, June 2024 [Slides] Open
View article: Ice-shelf freshwater triggers for the Filchner–Ronne Ice Shelf melt tipping point in a global ocean–sea-ice model
Ice-shelf freshwater triggers for the Filchner–Ronne Ice Shelf melt tipping point in a global ocean–sea-ice model Open
Some ocean modeling studies have identified a potential tipping point from a low to a high basal melt regime beneath the Filchner–Ronne Ice Shelf (FRIS), Antarctica, with significant implications for subsequent Antarctic ice sheet mass los…
View article: Ice-shelf freshwater triggers for the Filchner–Ronne Ice Shelf melt tipping point in a global ocean–sea-ice model
Ice-shelf freshwater triggers for the Filchner–Ronne Ice Shelf melt tipping point in a global ocean–sea-ice model Open
Some ocean modeling studies have identified a potential tipping point from a low to a high basal melt regime beneath the Filchner–Ronne Ice Shelf (FRIS), Antarctica, with significant implications for subsequent Antarctic ice sheet mass los…
View article: Emulation with uncertainty quantification of regional sea-level change caused by the Antarctic Ice Sheet
Emulation with uncertainty quantification of regional sea-level change caused by the Antarctic Ice Sheet Open
Projecting sea-level change in various climate-change scenarios typically involves running forward simulations of the Earth's gravitational, rotational and deformational (GRD) response to ice mass change, which requires high computational …
View article: Probabilistic projections of the Amery Ice Shelf catchment, Antarctica, under high ice-shelf basal melt conditions
Probabilistic projections of the Amery Ice Shelf catchment, Antarctica, under high ice-shelf basal melt conditions Open
Antarctica's Lambert Glacier drains about one-sixth of the ice from the East Antarctica Ice Sheet and is considered stable due to the strong buttressing provided by the Amery Ice Shelf. While previous projections of the sea-level contribut…
View article: The effects of including Antarctic subglacial meltwater flux to the ocean in the Energy Exascale Earth System Model
The effects of including Antarctic subglacial meltwater flux to the ocean in the Energy Exascale Earth System Model Open
Subglacial runoff beneath ice shelves is a source of freshwater, and therefore buoyancy, at the grounding line. Being released at depth, it accelerates an ascending plume along the ice-shelf base, enhancing entrainment of ambient waters, a…
View article: Towards a coupled Greenland ice sheet in E3SM
Towards a coupled Greenland ice sheet in E3SM Open
View article: Could increased melting from East Antarctic ice shelves trigger runaway melting beneath Filcher-Ronne Ice Shelf?
Could increased melting from East Antarctic ice shelves trigger runaway melting beneath Filcher-Ronne Ice Shelf? Open
View article: Interactions between surface melt and glacier dynamics in ice sheet and climate models
Interactions between surface melt and glacier dynamics in ice sheet and climate models Open
View article: Creating a Sea-Level-Enabled E3SM: A critical capability for predicting coastal impacts
Creating a Sea-Level-Enabled E3SM: A critical capability for predicting coastal impacts Open
View article: Tipping points in melting beneath Antarctic Ice Shelves
Tipping points in melting beneath Antarctic Ice Shelves Open
View article: Antarctic Ice shelf-ocean interactions in high-resolution, global simulations using the Energy Exascale Earth System Model (E3SM)
Antarctic Ice shelf-ocean interactions in high-resolution, global simulations using the Energy Exascale Earth System Model (E3SM) Open
View article: Antarctic ice shelf-ocean interactions in high-resolution, global simulations using the Energy Exascale Earth System Model (E3SM) Part 1: Configuration and evaluation
Antarctic ice shelf-ocean interactions in high-resolution, global simulations using the Energy Exascale Earth System Model (E3SM) Part 1: Configuration and evaluation Open
View article: Effects of ice shelf basal melt variability on evolution of Thwaites Glacier
Effects of ice shelf basal melt variability on evolution of Thwaites Glacier Open