Results 101 to 110 of about 117,586 (338)

Subglacial lake drainage detected beneath the Greenland ice sheet [PDF]

, 2015
The contribution of the Greenland ice sheet to sea-level rise has accelerated in recent decades. Subglacial lake drainage events can induce an ice sheet dynamic response—a process that has been observed in Antarctica, but not yet in Greenland, where the ...
A Shepherd, A Shepherd, A Sole, AJ Tedstone, AV Sundal, BE Smith, BR Parizek, C Schoof, DJ Wingham, E Hanna, E Rignot, F Walter, HJ Zwally, I Joughin, I Sasgen, ID Bartholomew, IM Howat, IM Howat, JF Nye, K Steffen, LA Stearns, LC Smith, M McMillan, M Morlighem, M Siegfried, M Tedesco, MJ Hoffman, MR van den Broeke, OV Sergienko, RL Shreve, RM Goldstein, RSW van de Wal, S Palmer, SB Das, SH Mernild, SJ Palmer, T Flament, TL Mote, V Chu, W Abdalati   +39 more
core   +1 more source

Modelling erratic dispersal accounting for shifting ice flow geometries: A new method and explanations of erratic dispersal of the British–Irish Ice Sheet

Journal of Quaternary Science, EarlyView.
ABSTRACT Glacial erratics are geologically distinctive rocks transported away from their source area by ice sheets and deposited in lithologically different bedrock areas. They have attracted much scientific curiosity with >24 000 observations across the British Isles.
R. L. Veness, C. D. Clark, J. C. Ely, J. L. Knight, A. Igneczi, S. L. Bradley   +5 more
wiley   +1 more source

A Hybrid Deep Neural Operator/Finite Element Method for Ice-Sheet Modeling [PDF]

arXiv, 2023
One of the most challenging and consequential problems in climate modeling is to provide probabilistic projections of sea level rise. A large part of the uncertainty of sea level projections is due to uncertainty in ice sheet dynamics. At the moment, accurate quantification of the uncertainty is hindered by the cost of ice sheet computational models ...
arxiv  

Reconstructing the late Pleistocene glacial history of the Cairngorm Mountains, Scotland, using paired cosmogenic 10Be and 14C

Journal of Quaternary Science, EarlyView.
ABSTRACT Chronologic and geomorphic evidence of past glaciations is largely recorded in areas at relatively low elevation and/or landscapes defined by high glacial erosion. As a result, data from areas that did not experience significant glacial erosion and the highest elevation locations are lacking from reconstructions of past ice masses.
Samuel E. Kelley, Alice M. Doughty, Nathaniel Lifton, Simon Pendleton, Cormac O'Brien, Graeme Warren   +5 more
wiley   +1 more source

From Obstacle Problems to Neural Insights: Feed Forward Neural Network Modeling of Ice Thickness [PDF]

2025
In this study, we integrate the established obstacle problem formulation from ice sheet modeling with cutting-edge deep learning methodologies to enhance ice thickness predictions, specifically targeting the Greenland ice sheet. By harmonizing the mathematical structure with an energy minimization framework tailored for neural network approximations ...
arxiv   +1 more source

Million years of Greenland Ice Sheet history recorded in ocean sediments [PDF]

, 2011
Geological records from Tertiary and Quaternary terrestrial and oceanic sections have documented the presence of ice caps and sea ice covers both in the Southern and the Northern hemispheres since Eocene times, approximately since 45 Ma.
Jessen, Catherine, Knutz, Paul, Kuijpers, Antoon, Mikkelsen, Naja, Nørgaard-Pedersen, Nils, Spielhagen, Robert F., Thiede, Jörn   +6 more
core  

Challenges in dating blanket peat and implications for understanding its initiation in Ireland

Journal of Quaternary Science, EarlyView.
ABSTRACT Blanket peat is widespread in maritime extra‐tropical environments. Prehistoric land‐use activity was traditionally invoked as the stimulus of blanket peat initiation in the British Isles, but recently, climate has been viewed as the driver of peat formation.
Helen Essell, Gill Plunkett, Maarten Blaauw   +2 more
wiley   +1 more source

What Darkens the Greenland Ice Sheet?

Eos, 2015
Limited observational data sets and incomplete surface energy balance models constrain understanding of the driving processes for Greenland's ice sheet.
Tedesco, M., Doherty, S, Warren, S, Tranter, Martyn, Stroeve, J, Fettweis, Xavier, P, Alexander   +6 more
openaire   +4 more sources

The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr

Journal of Glaciology, 2018
The Holocene climatic optimum was a period 8–5 kyr ago when annual mean surface temperatures in Greenland were 2–3°C warmer than present-day values. However, this warming left little imprint on commonly used temperature proxies often used to derive the ...
LISBETH T. NIELSEN, GUðFINNA AÐALGEIRSDÓTTIR, VASILEIOS GKINIS, ROMAN NUTERMAN, CHRISTINE S. HVIDBERG   +4 more
doaj   +1 more source

Influence of temperature fluctuations on equilibrium
ice sheet volume [PDF]

The Cryosphere, 2018
Forecasting the future sea level relies on accurate modeling of the response of the Greenland and Antarctic ice sheets to changing temperatures. The surface mass balance (SMB) of the Greenland Ice Sheet (GrIS) has a nonlinear response to warming. Cold
T. B. Mikkelsen, A. Grinsted, P. Ditlevsen   +2 more
doaj   +1 more source