grounding line
Actively evolving subglacial conduits and eskers initiate ice shelf channels at an Antarctic grounding line
... and grounding line in the study area are thought to have been stable for millennia—such stability would promote the growth of large ...the grounding line retreats, rapid degradation by ...
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Two independent methods for mapping the grounding line of an outlet glacier – an example from the Astrolabe Glacier, Terre Adélie, Antarctica
... (red line) super- posed on top of the previous reference ...entire grounding zone (FH), now implying a more realistic migration for the grounding ...
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Ice stream grounding-line stability on a reverse bed slope
... reproduce grounding line retreat patterns in Marguerite ...the grounding line and are interpreted as representing a period of relatively stable ice stream position 21-22 during which there is ...
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Representation of basal melting at the grounding line in ice flow models
... of grounding lines and basal fric- tion in the grounding zone, little has been done about the impact of the numerical treatment of ocean-induced basal melting in this ...sulting grounding line ...
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Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers
... processes. Grounding-line retreat exposes additional and, for a retrograde bed, deeper sub-shelf area to melt, potentially increasing the integrated melt rate without any change in ocean heat content (De ...
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Actively evolving subglacial conduits and eskers initiate ice shelf channels at an Antarctic grounding line
... the grounding line, the magnitude of the water flux through the conduit Q is largely determined by the catchment basin farther upstream and, neglecting additional water input from melting at the channel ...
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Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland
... The grounding line is located at the base of the ice sheet whereas the hinge line is the manifestation of this feature at the ice ...and grounding lines we can infer from elastic beam theory ...
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Parameterising the grounding line in flow-line ice sheet models
... study, H2 GB2 (Sect. 3.1.6), gives errors comparable to the worst GLP, LI B1, run at twice as fine a resolution (i.e. dou- ble the number of grid points). This result holds for both the linear and non-linear drag laws. ...
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Diagnosing ice sheet grounding line stability from landform morphology
... its grounding lines, which are in turn sensitive to ocean-induced melting, calv- ing, and flotation of the ice ...the grounding line is also a sedimentary environment, the constructional landforms ...
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Grounding line transient response in marine ice sheet models
... the grounding line (GL), where ice loses contact with bed and, downstream, be- gins to float over the ocean, is an essential control on the mass balance of a marine ice ...
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Hydrostatic grounding line parameterization in ice sheet models
... the grounding line position: ice shelves are assumed to float hydrostatically in ocean water (Huybrechts, 1990; van der Veen, 1985; Ritz et ...ing line position and simulations show a strong ...
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Basal friction of Fleming Glacier, Antarctica – Part 2: evolution from 2008 to 2015
... un- grounding of the FG from the 1996 grounding line position (Rignot et ...the grounding line could be an- other possible factor in the glacier acceleration and ground- ing line ...
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Deglaciation and future stability of the Coats Land ice margin, Antarctica
... The study area is the south-western part of Antarctic Drainage System 4 (as defined by Zwally et al., 2012) (Fig. 1a). Here, the EAIS discharges into the Weddell Sea via the Coats Land ice margin: 600 km of ...
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Dynamically coupling full Stokes and shallow shelf approximation for marine ice sheet flow using Elmer/Ice (v8.3)
... Pattyn, F., Perichon, L., Durand, G., Favier, L., Gagliardini, O., Hindmarsh, R. C., Zwinger, T., Albrecht, T., Cornford, S., Doc- quier, D., Fürst, J. J., Goldberg, D., Gudmundsson, G. H., Hum- bert, A., Hütten, M., ...
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Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model
... or coarser when the basal shear stress smoothly approaches zero near the grounding line. Much finer resolution, ∼500 m in the linear bed experiment and ∼100 m in the polynomial bed experiment, is required ...
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Assimilation of Antarctic velocity observations provides evidence for uncharted pinning points
... Bedmap2 grid spacing. The Bedmap2 geometry was primar- ily gridded and processed on 5 km resolution and only ren- dered at 1 km for its final release. The majority of the com- plementary dInSAR data points are not more ...
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Stopping the flood: could we use targeted geoengineering to mitigate sea level rise?
... Here, we explore the possibility of using either a continuous artificial sill or isolated artificial pinning points to counter an ongoing MISI (Moore et al., 2018). We explore the ef- fect of this intervention on the ...
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Sea-level response to melting of Antarctic ice shelves on multi-centennial timescales with the fast Elementary Thermomechanical Ice Sheet model (f.ETISh v1.0)
... the grounding line (retrograde bed slopes) so that increased (atmospheric–oceanic) melting leads to re- cession of the grounding ...the grounding line is a key factor in controlling ice ...
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Temporal variations in the flow of a large Antarctic ice stream controlled by tidally induced changes in the subglacial water system
... Observations of surface motion of the RIS show a strong, nonlinear response that propagates a long way upstream from the grounding line. The nonlinear response of this ice stream and others in the region is ...
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Impact of millennial-scale oceanic variability on the Greenland ice-sheet evolution throughout the last glacial period
... The total ice mass balance is defined at any time as the dif- ference between the mass balance at the ice surface (accumu- lation minus ablation), basal melting at the ice base and ice calving. Surface ablation is ...
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