Results 1 to 10 of about 4,984 (254)
Comparison of sea ice kinematics at different resolutions modeled with a grid hierarchy in the Community Earth System Model (version 1.2.1) [PDF]
Geoscientific Model Development, 2021 High-resolution sea ice modeling is becoming widely available for both operational forecasts and climate studies. In traditional Eulerian grid-based models, small-scale sea ice kinematics represent the most prominent feature of high-resolution ...
S. Xu +7 more
doaj +7 more sources
Drivers of Pine Island Glacier speed-up between 1996 and 2016 [PDF]
The Cryosphere, 2021 Pine Island Glacier in West Antarctica is among the fastest changing glaciers worldwide. Over the last 2 decades, the glacier has lost in excess of a trillion tons of ice, or the equivalent of 3 mm of sea level rise.
J. De Rydt +3 more
doaj +1 more source
Presentation and evaluation of the Arctic sea ice forecasting system neXtSIM-F [PDF]
The Cryosphere, 2021 The neXtSIM-F (neXtSIM forecast) forecasting system consists of a stand-alone sea ice model, neXtSIM (neXt-generation Sea Ice Model), forced by the TOPAZ ocean forecast and the ECMWF atmospheric forecast, combined with daily data assimilation of sea ice ...
T. Williams +4 more
doaj +1 more source
On the nonlinear viscosity of the orthotropic bulk rheology
Journal of Glaciology, 2022 We compare different ways the bulk flow nonlinearity of glacier ice can be captured in an orthotropic rheology. Specifically, we compare the unapproximated orthotropic rheology, derived from plastic potential theory, to existing approximations that ...
Nicholas M. Rathmann, David A. Lilien
doaj +1 more source
Large-scale englacial folding and deep-ice stratigraphy within the West Antarctic Ice Sheet [PDF]
The Cryosphere, 2020 It has been hypothesized that complex englacial structures identified within the East Antarctic and Greenland ice sheets are generated by (i) water freezing to the ice sheet base and evolving under ice flow, (ii) deformation of ice of varying rheology ...
N. Ross, H. Corr, M. Siegert
doaj +1 more source
Impact of rheology on probabilistic forecasts of sea ice trajectories: application for search and rescue operations in the Arctic [PDF]
The Cryosphere, 2018 We present a sensitivity analysis and discuss the probabilistic forecast capabilities of the novel sea ice model neXtSIM used in hindcast mode. The study pertains to the response of the model to the uncertainty on winds using probabilistic forecasts ...
M. Rabatel +4 more
doaj +1 more source
Journal of Glaciology, 2021 Drag at the bed and along the lateral margins are the primary forces resisting flow in outlet glaciers. Simultaneously inferring these parameters is challenging since basal drag and ice viscosity are coupled in the momentum balance, which governs ice ...
Meghana Ranganathan +3 more
doaj +1 more source
Variational inference of ice shelf rheology with physics-informed machine learning
Journal of Glaciology, 2023 Floating ice shelves that fringe the coast of Antarctica resist the flow of grounded ice into the ocean. One of the key factors governing the amount of flow resistance an ice shelf provides is the rigidity (related to viscosity) of the ice that ...
Bryan Riel, Brent Minchew
doaj +1 more source
Journal of Glaciology, 2018 Ice rheology governs how glaciers flow and respond to environmental change. The rheology of glacier ice evolves in response to a variety of mechanisms, including damage, heating, melting and the development of crystalline fabric.
BRENT M. MINCHEW +4 more
doaj +1 more source
Non-normal flow rules affect fracture angles in sea ice viscous–plastic rheologies [PDF]
The Cryosphere, 2021 The standard viscous–plastic (VP) sea ice model with an elliptical yield curve and a normal flow rule has at least two issues. First, it does not simulate fracture angles below 30∘ in uni-axial compression, in contrast with observations of linear ...
D. Ringeisen +3 more
doaj +1 more source