Geologic provinces beneath the Greenland Ice Sheet constrained by geophysical data synthesis

JA MacGregor, WT Colgan… - Geophysical …, 2024 - Wiley Online Library
Present understanding of Greenland's subglacial geology is derived mostly from
interpolation of geologic mapping of its ice‐free margins and unconstrained by geophysical …

[HTML][HTML] Patterns of valley incision beneath the Greenland Ice Sheet revealed using automated mapping and classification

GJG Paxman - Geomorphology, 2023 - Elsevier
Abstract The Greenland Ice Sheet covers an area of 1.7 million km 2, equivalent to∼ 79% of
the surface of Kalaallit Nunaat (Greenland) and∼ 1.2% of the Earth's land surface. The …

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

GJG Paxman, SSR Jamieson, AM Dolan… - The …, 2024 - tc.copernicus.org
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 …

[HTML][HTML] Misidentified subglacial lake beneath the Devon Ice Cap, Canadian Arctic: A new interpretation from seismic and electromagnetic data

SF Killingbeck, A Rutishauser, MJ Unsworth… - The …, 2024 - tc.copernicus.org
In 2018 the first subglacial lake in the Canadian Arctic was proposed to exist beneath the
Devon Ice Cap, based on the analysis of airborne radar data. Here, we report a new …

[HTML][HTML] Ice acceleration and rotation in the Greenland Ice Sheet interior in recent decades

A Løkkegaard, W Colgan, K Hansen… - … Earth & Environment, 2024 - nature.com
In the past two decades, mass loss from the Greenland ice sheet has accelerated, partly due
to the speedup of glaciers. However, uncertainty in speed derived from satellite products …

[HTML][HTML] Subglacial lake activity beneath the ablation zone of the Greenland Ice Sheet

Y Fan, CQ Ke, X Shen, Y Xiao… - The Cryosphere …, 2022 - tc.copernicus.org
Hydrologically active subglacial lakes can drain large volumes of water and sediment along
subglacial pathways, affecting the motion and mass balance of ice masses, and impacting …

Episodic subglacial drainage cascades below the Northeast Greenland Ice Stream

JK Andersen, N Rathmann, CS Hvidberg… - Geophysical …, 2023 - Wiley Online Library
Subglacial hydrology can exert an important control on ice flow by affecting friction at the ice‐
bedrock interface. Here, we report on a series of subglacial drainage events along the …

[HTML][HTML] Greenland and Canadian Arctic ice temperature profiles

A Løkkegaard, K Mankoff, C Zdanowicz… - The Cryosphere …, 2022 - tc.copernicus.org
Here, we present a compilation of 85 ice temperature profiles from 79 boreholes from the
Greenland Ice Sheet and peripheral ice caps, as well as local ice caps in the Canadian …

[HTML][HTML] Drill-site selection for cosmogenic-nuclide exposure dating of the bed of the Greenland Ice Sheet

JP Briner, CK Walcott, JM Schaefer, NE Young… - The …, 2022 - tc.copernicus.org
Direct observations of the size of the Greenland Ice Sheet during Quaternary interglaciations
are sparse yet valuable for testing numerical models of ice-sheet history and sea level …

[HTML][HTML] Evaluating different geothermal heat flow maps as basal boundary conditions during spin up of the Greenland ice sheet

T Zhang, W Colgan, A Wansing… - The Cryosphere …, 2023 - tc.copernicus.org
There is currently poor scientific agreement whether the ice-bed interface is frozen or
thawed beneath approximately one-third of the Greenland ice sheet. This disagreement in …