Results 21 to 30 of about 208,369 (219)

Brief communication: Reduced bandwidth improves the depth limit of the radar coherence method for detecting ice crystal fabric asymmetry [PDF]

The Cryosphere
Ice crystal orientation fabric strongly affects the viscous deformation of glacier ice. A popular technique to investigate ice fabric is radar polarimetry, often analysed using the coherence method.
O. Zeising, O. Zeising, Á. Arenas-Pingarrón, A. M. Brisbourne, C. Martín   +4 more
doaj   +1 more source

Modelling the influence of marine ice on the dynamics of an idealised ice shelf

Journal of Glaciology, 2023
Understanding the dynamic behaviour of ice shelves, specifically the controls on their ability to buttress the flow of ice into the ocean, is critical for predicting future ice-sheet contributions to sea level rise.
Lisa Craw, Felicity S. McCormack, Sue Cook, Jason Roberts, Adam Treverrow   +4 more
doaj   +1 more source

Decoupling of δ¹⁸O from surface temperature in Antarctica in an ensemble of historical simulations [PDF]

Climate of the Past
Stable water isotopes recorded in Antarctic ice cores have traditionally been used to infer past surface air temperatures (SATs). During the historical period (1850 onward), observational data and good-quality ice core records overlap, yielding an ...
S. Goursaud Oger, S. Goursaud Oger, L. C. Sime, M. Holloway   +3 more
doaj   +1 more source

Modeling the Greenland englacial stratigraphy [PDF]

The Cryosphere, 2021
Radar reflections from the interior of the Greenland ice sheet contain a comprehensive archive of past accumulation rates, ice dynamics, and basal melting. Combining these data with dynamic ice sheet models may greatly aid model calibration, improve past
A. Born, A. Born, A. Robinson, A. Robinson, A. Robinson   +4 more
doaj   +1 more source

H11 meltwater and standard 127 ka Last Interglacial simulations suggest more modest peak temperatures for both Greenland and Antarctica: a multi-model study of water isotopes [PDF]

Climate of the Past
The Last Interglacial (LIG) period, approximately 130 000 to 115 000 years ago, represents one of the warmest intervals of the past 800 000 years. Here, we simulate water isotopes in precipitation over Antarctica and the Arctic during the LIG, using ...
L. C. Sime, R. Sivankutty, I. Malmierca-Vallet, S. Goursaud Oger, S. Goursaud Oger, A. N. LeGrande, E. L. McClymont, A. de Boer, A. Cauquoin, M. Werner   +9 more
doaj   +1 more source

Assessment of the southern polar and subpolar warming in the PMIP4 last interglacial simulations using paleoclimate data syntheses [PDF]

Climate of the Past
Given relatively abundant paleo-proxies, the study of the last interglacial (LIG, ∼ 129–116 000 years ago, ka) is valuable to understanding the responses and feedback of the Southern Ocean and Antarctica in a warmer-than-preindustrial climate.
Q. Gao, Q. Gao, Q. Gao, E. Capron, L. C. Sime, R. H. Rhodes, R. Sivankutty, X. Zhang, B. L. Otto-Bliesner, M. Werner   +9 more
doaj   +1 more source

Development of a low-temperature immersion microscopy technique for ice research

Annals of Glaciology, 2023
Perennial ice can be studied for many purposes, including paleoclimate records or rheological properties. For most of those purposes, the ice microstructure must be studied, often through optical microscopy.
Bittor Muniozguren-Arostegi, Patricia Muñoz-Marzagon, Sérgio Henrique Faria   +2 more
doaj   +1 more source

Bed topography and marine ice-sheet stability

Journal of Glaciology, 2022
This paper examines the effect of basal topography and strength on the grounding-line position, flux and stability of rapidly-sliding ice streams.
Olga V. Sergienko, Duncan J. Wingham
doaj   +1 more source

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