Results 71 to 80 of about 630,227 (329)

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Evaluating CMIP6 models for near-surface air temperature projections over Antarctic ice shelves

Journal of Glaciology
The meltwater-driven disintegration of the Larsen B ice shelf has raised concerns that other ice shelves may face similar vulnerabilities as global temperatures rise.
Maya Fields, Jeremy Bassis, Samuel B Kachuck, Mark Moldwin, Cécile Agosta   +4 more
doaj   +1 more source

Seasonal variability of ocean heat transport and ice-shelf basal melt around Antarctica [PDF]

The Cryosphere
The delivery of ocean heat to Antarctic ice shelves is due to intrusions of waters warmer than the local freezing point temperature. Changes in the supply of ocean heat will determine how rapidly ice shelves melt at their base, which affects Antarctic ...
F. Boeira Dias, F. Boeira Dias, M. H. England, M. H. England, A. K. Morrison, B. K. Galton-Fenzi, B. K. Galton-Fenzi, B. K. Galton-Fenzi   +7 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

Equilibrium Profile of Ice Shelves

Journal of Glaciology, 1979
AbstractUsing expressions for ice-shelf creep derived by Weertman (1957) and Thomas (1973[b]) a general method is developed for calculating equilibrium thickness profiles, velocities, and strain-rates for any ice shelf. This is done first for an unconfined glacier tongue and the result agrees well with data for Erebus Glacier tongue (Holdsworth, 1974).
openaire   +2 more sources

Cell wall target fragment discovery using a low‐cost, minimal fragment library

FEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +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

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

Investigation of land ice-ocean interaction with a fully coupled ice-ocean model, Part 1: Model description and behavior [PDF]

, 2012
Antarctic ice shelves interact closely with the ocean cavities beneath them, with ice shelf geometry influencing ocean cavity circulation, and heat from the ocean driving changes in the ice shelves, as well as the grounded ice streams that feed them.
A. Gnanadesikan, Assmann, Benn, C. M. Little, D. N. Goldberg, Determann, Dupont, Durand, Echelmeyer, Goldberg, Goldberg, Grosfeld, Grosfeld, Hallberg, Heimbach, Hindmarsh, Holland, Holland, Holland, Jacobs, Jacobs, Jenkins, Jenkins, Jenkins, Jenkins, Jenkins, Joughin, Joughin, Joughin, Krabill, Lane-Serff, Larour, Larour, Little, Little, Little, Little, M. Oppenheimer, MacAyeal, Nicholls, Nowicki, O. V. Sergienko, Parizek, Paterson, Payne, Payne, Pollard, R. Hallberg, Rignot, Scambos, Schmeltz, Schoof, Schoof, Shepherd, Shepherd, Shepherd, Thomas, Thomas, Thomas, Van der Veen, Walker, Weertman, Weertman   +62 more
core   +1 more source

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