Results 61 to 70 of about 478,422 (316)

Bathymetry Beneath Ice Shelves of Western Dronning Maud Land, East Antarctica, and Implications on Ice Shelf Stability

Geophysical Research Letters, 2020
Antarctica's ice shelves play a key role in stabilizing the ice streams that feed them. Since basal melting largely depends on ice‐ocean interactions, it is vital to attain consistent bathymetry models to estimate water and heat exchange beneath ice ...
H. Eisermann, G. Eagles, A. Ruppel, Emma C. Smith, W. Jokat   +4 more
semanticscholar   +1 more source

Treatment of the ice-shelf backpressure and buttressing in two horizontal dimensions

Journal of Glaciology
The ice discharge from the grounded parts of marine ice sheets into the ocean is modulated by their floating extensions – ice shelves. The ice-shelf impact on the grounded ice is typically described as ‘backpressure’ or ‘buttressing’.
Olga Sergienko
doaj   +1 more source

Basal crevasses in Larsen C Ice Shelf and implications for their global abundance [PDF]

The Cryosphere, 2012
Basal crevasses extend upwards from the base of ice bodies and can penetrate more than halfway through the ice column under conditions found commonly on ice shelves.
A. Luckman, D. Jansen, B. Kulessa, E. C. King, P. Sammonds, D. I. Benn   +5 more
doaj   +1 more source

The effect of landfast sea ice buttressing on ice dynamic speedup in the Larsen B embayment, Antarctica [PDF]

The Cryosphere
We observe the evacuation of 11-year-old landfast sea ice in the Larsen B embayment on the East Antarctic Peninsula in January 2022, which was in part triggered by warm atmospheric conditions and strong offshore winds.
T. Surawy-Stepney, A. E. Hogg, S. L. Cornford, B. J. Wallis, B. J. Davison, H. L. Selley, R. A. W. Slater, E. K. Lie, L. Jakob, A. Ridout, N. Gourmelen, N. Gourmelen, B. I. D. Freer, B. I. D. Freer, S. F. Wilson, A. Shepherd   +15 more
doaj   +1 more source

Ice viscosity is more sensitive to stress than commonly assumed

Communications Earth & Environment, 2022
The rate of deformation in Antarctic ice shelves is proportional to stress to the power of 4, not 3 as often used in models, according to a calibration of Glen’s Flow Law with satellite remote sensing data from Antarctic ice shelves.
Joanna D. Millstein, Brent M. Minchew, Samuel S. Pegler   +2 more
doaj   +1 more source

The thioredoxin‐like and one glutaredoxin domain are required to rescue the iron‐starvation phenotype of HeLa GLRX3 knock out cells

FEBS Letters, EarlyView.
Glutaredoxin (Grx) 3 proteins contain a thioredoxin domain and one to three class II Grx domains. These proteins play a crucial role in iron homeostasis in eukaryotic cells. In human Grx3, at least one of the two Grx domains, together with the thioredoxin domain, is essential for its function in iron metabolism.
Laura Magdalena Jordt, Manuela Gellert, Finja Zelms, Sander Bekeschus, Christopher Horst Lillig   +4 more
wiley   +1 more source

Simulated melt rates for the Totten and Dalton ice shelves [PDF]

Ocean Science, 2014
The Totten Glacier is rapidly losing mass. It has been suggested that this mass loss is driven by changes in oceanic forcing; however, the details of the ice–ocean interaction are unknown.
D. E. Gwyther, B. K. Galton-Fenzi, J. R. Hunter, J. L. Roberts   +3 more
doaj   +1 more source

Basal channels on ice shelves [PDF]

Journal of Geophysical Research: Earth Surface, 2013
Recent surveys of floating ice shelves associated with Pine Island Glacier (Antarctica) and Petermann Glacier (Greenland) indicate that there are channels incised upward into their bottoms that may serve as the conduits of meltwater outflow from the sub‐ice‐shelf cavity.
openaire   +2 more sources

Disruption of SETD3‐mediated histidine‐73 methylation by the BWCFF‐associated β‐actin G74S mutation

FEBS Letters, EarlyView.
The β‐actin G74S mutation causes altered interaction of actin with SETD3, reducing histidine‐73 methylation efficiency and forming two distinct actin variants. The variable ratio of these variants across cell types and developmental stages contributes to tissue‐specific phenotypical changes. This imbalance may impair actin dynamics and mechanosensitive
Anja Marquardt, Marcus S. Münchhoff, Jacqueline Krohn, Philip M. Palarz, Manuel H. Taft, Johannes N. Greve, Nataliya Di Donato, Falk F. R. Buettner, Dietmar J. Manstein   +8 more
wiley   +1 more source

Evolution of ice-shelf channels in Antarctic ice shelves [PDF]

The Cryosphere, 2015
Abstract. Ice shelves buttress the continental ice flux and mediate ice–ocean interactions. They are often traversed by channels in which basal melting is enhanced, impacting ice-shelf stability. Here, channel evolution is investigated using a transient, three-dimensional full Stokes model and geophysical data collected on Roi Baudouin Ice Shelf (RBIS),
openaire   +5 more sources