Results 1 to 10 of about 194,023 (268)

Evaporative controls on Antarctic precipitation: an ECHAM6 model study using innovative water tracer diagnostics [PDF]

The Cryosphere
Improving our understanding of the controls on Antarctic precipitation is critical for gaining insights into past and future polar and global environmental changes.
Q. Gao, Q. Gao, L. C. Sime, A. J. McLaren, T. J. Bracegirdle, E. Capron, R. H. Rhodes, H. C. Steen-Larsen, X. Shi, M. Werner   +9 more
doaj   +1 more source

Rapid Basal Channel Growth Beneath Greenland's Longest Floating Ice Shelf

Geophysical Research Letters, 2023
Nioghalvfjerdsfjorden Glacier (N79) is one of the two main outlets for Greenland's largest ice stream, the Northeast Greenland Ice Stream, and is the more stable of the two, with no calving front retreat expected in the near future. Using a novel surface
Ash Narkevic, Bea Csatho, Toni Schenk
doaj   +1 more source

On the physical basis for the creep of ice: the high temperature regime

Journal of Glaciology, 2020
This work quantifies the increased temperature sensitivity of the constitutive behavior of ice with proximity to the melting point in terms of dislocation mechanics.
D.M. Cole
doaj   +1 more source

Evidence of Abrupt Transitions Between Sea Ice Dynamical Regimes in the East Greenland Marginal Ice Zone

Geophysical Research Letters, 2023
Sea ice modulates the energy exchange between the atmosphere and the ocean through its kinematics. Marginal ice zone (MIZ) dynamics are complex and are not well resolved in routine observations.
Daniel M. Watkins, Angela C. Bliss, Jennifer K. Hutchings, Monica M. Wilhelmus   +3 more
doaj   +1 more source

Implementation of water tracers in the Met Office Unified Model [PDF]

Geoscientific Model Development
There is an increasing need to understand how water is cycled and transported within the atmosphere, to aid water management. Here, atmospheric water tracers are added to the Met Office Unified Model (UM) to allow tracking of water within the model. This
A. J. McLaren, L. C. Sime, S. Wilson, J. Ridley, Q. Gao, Q. Gao, M. Gorguner, G. Line, M. Werner, P. Valdes   +9 more
doaj   +1 more source

The role of near-terminus conditions in the ice-flow speed of Upernavik Isstrøm in northwest Greenland

Annals of Glaciology, 2023
Upernavik Isstrøm, the largest contributor to sea-level rise in northwest Greenland, has experienced complex and contrasting ice-flow-speed changes across its five outlets over the last two decades.
Kelsey M. Voss, Karen E. Alley, David A. Lilien, Dorthe Dahl-Jensen   +3 more
doaj   +1 more source

Dynamical Instabilities of Ice X

Physical Review Letters, 2008
Water ice X is stable in the 120-400 GPa pressure range, as obtained from lattice dynamical calculations performed using the density-functional theory. Below 120 GPa, it is characterized by one unstable flat phonon band, which generates the disordered ice X structure.
openaire   +3 more sources

Antarctic last interglacial isotope peak in response to sea ice retreat not ice-sheet collapse

Nature Communications, 2016
The peak in Antarctic ice core isotope values, 128,000 years before present, was concurrent with a significantly warmer-than-present Antarctic climate.
Max D. Holloway, Louise C. Sime, Joy S. Singarayer, Julia C. Tindall, Pete Bunch, Paul J. Valdes   +5 more
doaj   +1 more source

Windblown Diatoms for Reconstructing Westerly Wind Variability in the South Atlantic Sector of the Southern Ocean

Geophysical Research Letters
Southern Hemisphere westerly winds are important drivers of Antarctic and sub‐Antarctic environmental change. Short observational wind records prevent us from fully understanding the scope of their variability.
Dieter R. Tetzner, Elizabeth R. Thomas, Claire S. Allen, Delia Segato, Shaun Miller   +4 more
doaj   +1 more source

The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea [PDF]

Climate of the Past
Peter I Island is situated in the Bellingshausen Sea, a region that has experienced considerable climate change in recent decades. Warming sea surface temperatures and reduced sea ice cover have been accompanied by warming surface air temperature ...
E. R. Thomas, D. Tetzner, B. Markle, B. Markle, J. Pedro, J. Pedro, G. Gacitúa, D. E. Moser, D. E. Moser, S. Jackson   +9 more
doaj   +1 more source