Results 111 to 120 of about 94,420 (318)

Automatic identification of streamlined subglacial bedforms using machine learning: an open‐source Python approach

Boreas, EarlyView.
Morphometric values of streamlined subglacial bedforms provide valuable information about the relative speed, direction, and maturity of past ice streams. This paper presents a new tool that utilizes a machine learning approach to automatically identify glacially derived streamlined features.
Ellianna Abrahams, Marion McKenzie, Fernando Pérez, Ryan Venturelli   +3 more
wiley   +1 more source

Subglacial valleys preserved in the highlands of south and east Greenland record restricted ice extent during past warmer climates [PDF]

The Cryosphere
The Greenland Ice Sheet is a key contributor to contemporary global sea level rise, but its long-term history and response to episodes of warming in Earth's geological past remain uncertain.
G. J. G. Paxman, S. S. R. Jamieson, A. M. Dolan, M. J. Bentley   +3 more
doaj   +1 more source

Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model [PDF]

, 2010
In a sensitivity experiment, an eddy-permitting ocean general circulation model is forced with realistic freshwater fluxes from the Greenland Ice Sheet, averaged for the period 1991–2000.
Aksenov, Y., Bamber, J.L., Coward, A.C., de Cuevas, B.A., Desbruyeres, D., Marsh, R.   +5 more
core   +6 more sources

Reconstructions of the 1900–2015 Greenland ice sheet surface mass balance using the regional climate MAR model

, 2016
. With the aim of studying the recent Greenland ice sheet (GrIS) surface mass balance (SMB) decrease relative to the last century, we have forced the regional climate MAR (Modele Atmospherique Regional; version 3.5.2) model with the ERA-Interim (ECMWF ...
X. Fettweis, J. Box, Cécile Agosta, C. Amory, C. Kittel, C. Lang, D. As, H. Machguth, H. Gallee   +8 more
semanticscholar   +1 more source

Changes in the Velocity Structure of the Greenland Ice Sheet [PDF]

Science, 2006
Using satellite radar interferometry observations of Greenland, we detected widespread glacier acceleration below 66° north between 1996 and 2000, which rapidly expanded to 70° north in 2005. Accelerated ice discharge in the west and particularly in the east doubled the ice sheet mass deficit in the last decade from 90 to 220 cubic kilometers per year.
P. Kanagaratnam, P. Kanagaratnam, Eric Rignot, Eric Rignot   +3 more
openaire   +5 more sources

Increased aeolian activity linked to Neoglacial cooling and glacier advance in southern Greenland

Boreas, EarlyView.
Intense aeolian activity observed in the Igaliku Kujalleq records in S Greenland is not related to Norse activities. Instead, we suggest that changes in the North Atlantic atmospheric circulation pattern combined with Neoglacial glacier advances led to increased katabatic wind activity and triggered increased aeolian activity from large outwash plains.
Nicolaj K. Larsen, Marie‐Louise Siggaard‐Andersen, Jan‐Pieter Buylaert, Andrew S. Murray, Jesper Olsen, Anthony Ruter, Kristian K. Kjeldsen, Anders A. Bjørk, Naja Mikkelsen, Kurt H. Kjær   +9 more
wiley   +1 more source

A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction [PDF]

, 2008
Controversy exists over the extent of glaciation in Eastern Asia at the Last Glacial Maximum: complete ice sheet cover vs. restricted mountain icefields (an area discrepancy equivalent to 3.7 Greenland Ice Sheets).
Bigg, G.R., Clark, C.D., Hughes, A.L.C.
core   +1 more source

Dark zone of the Greenland Ice Sheet controlled by distributed biologically-active impurities

Nature Communications, 2018
Albedo—a primary control on surface melt—varies considerably across the Greenland Ice Sheet yet the specific surface types that comprise its dark zone remain unquantified.
J. Ryan, A. Hubbard, M. Stibal, T. Irvine‐Fynn, J. Cook, L. Smith, Karen A. Cameron, J. Box   +7 more
semanticscholar   +1 more source

An inventory of subglacial overdeepenings in southern Germany and Austria

Boreas, EarlyView.
We present an inventory and morphometric characterization of >100 individual overdeepened basins in southern Germany and Austria compiled from heterogeneous sources. Arrangement and dimensions of overdeepenings are compared to those of their western Alpine counterparts, to catchment topographies and bedrock lithologies, and to modelled ice‐flow ...
Lukas Gegg, Bernhard C. Salcher, Thomas Pollhammer, Denis Cohen, Urs H. Fischer, Angela Landgraf   +5 more
wiley   +1 more source

Heterogeneous impacts of ocean thermal forcing on ice discharge from Greenland's peripheral tidewater glaciers over 2000–2021

Scientific Reports
The Greenland Ice Sheet is losing mass at increasing rates. Substantial amounts of this mass loss occur by ice discharge which is influenced by ocean thermal forcing. The ice sheet is surrounded by thousands of peripheral, dynamically decoupled glaciers.
Marco Möller, Beatriz Recinos, Philipp Rastner, Ben Marzeion   +3 more
doaj   +1 more source