Results 81 to 90 of about 2,018 (207)

The feasibility of imaging subglacial hydrology beneath ice streams with ground-based electromagnetics

Journal of Glaciology, 2017
Subglacial hydrologic systems in Antarctica and Greenland play a fundamental role in ice-sheet dynamics, yet critical aspects of these systems remain poorly understood due to a lack of observations.
KERRY KEY, MATTHEW R. SIEGFRIED
doaj   +1 more source

Subglacial Lake Discharge Affects the Age and Concentration Distribution of Dissolved Organic Carbon in Ross Sea Surface Waters

AGU Advances, Volume 7, Issue 5, August 2026.
Abstract The Ross Sea continental shelf plays a key role in the global carbon cycle. However, the sources and cycling of dissolved organic carbon (DOC) in the region are poorly understood. Here, we determined the radiocarbon (14C) and stable carbon isotope (13C) contents of DOC in addition to those of dissolved inorganic carbon (DIC) in the Little ...
Sunmin Oh, Yeongjin Ryu, Heejun Han, Taehee Na, Tae‐Wan Kim, Jisoo Park, Guebuem Kim, Ellen R. M. Druffel, Jeomshik Hwang   +8 more
wiley   +1 more source

Seismic Characteristics of the Gas Hydrate System in the Mackenzie Trough of the Canadian Beaufort Sea, Arctic Ocean

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract We present a comprehensive seismic characterization of the gas hydrate system in the outer continental shelf of the Mackenzie Trough, Canadian Beaufort Sea, based on recently acquired multichannel seismic (MCS) data, P‐wave velocity modeling, and 3D thermal modeling. We identified high‐amplitude, reverse‐polarity Bottom‐Simulating Reflections (
Yeonjin Choi, Young Keun Jin, Michael Riedel, Jong Kuk Hong, Mathieu J. Duchesne, Sung‐Ryul Shin, Wookeen Chung, Seung‐Goo Kang   +7 more
wiley   +1 more source

Glacial Geomorphology of southern Alberta, Canada [PDF]

, 2009
During deglaciation from the Last Glacial Maximum three terrestrial ice streams within the south western sector of the Laurentide Ice Sheet competed and coalesced in southern Alberta; the High Plains Ice Stream (HPIS), Central Alberta Ice Stream (CAIS ...
YOUNG, NATHANIEL,JOSEPH,PETER
core  

Quantifying Ice‐Sheet Derived Lead (Pb) Fluxes to the Ocean; A Case Study at Nioghalvfjerdsbræ

Geophysical Research Letters, 2022
Concentrations of the toxic element lead (Pb) are elevated in seawater due to historical emissions. While anthropogenic atmospheric emissions are the dominant source of dissolved Pb (dPb) to the Atlantic Ocean, evidence is emerging of a natural source ...
Stephan Krisch, Oliver Huhn, Ali Al‐Hashem, Mark J. Hopwood, Pablo Lodeiro, Eric P. Achterberg   +5 more
doaj   +1 more source

Capturing Runoff‐Driven Seasonal Velocity Variations of Fast‐Flowing Outlet Glaciers in Coupled Ice‐Hydrology Simulations

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The seasonal evolution of the subglacial drainage system is a critical control on velocity variations of Greenland marine‐terminating glaciers. Yet numerical models struggle to reproduce observed seasonal behavior, because fast flow suppresses channelization in subglacial hydrology models.
A. Jenson, J. M. Amundson, M. Truffer, A. Pohle, L. Ultee   +4 more
wiley   +1 more source

The Biogeochemical Legacy of Arctic Subglacial Sediments Exposed by Glacier Retreat [PDF]

During past periods of advance, Arctic glaciers and ice sheets overrode soil, sediments, and vegetation and buried significant stores of organic matter (OM); these glaciers are now shrinking rapidly due to climate warming.
Simpson, M. J., Hajdas, I, Yde, J. C., Stibal, M., Kohler, T. J., Falteisek, L., Mercl, F., Vinsova, P., Yuan, T., Tejnecky, V, Hood, E., Zarsky, J. D.   +11 more
core   +1 more source

Subglacial controls on the flow of Institute Ice Stream, West Antarctica

Annals of Glaciology, 2016
The Institute Ice Stream (IIS) rests on a reverse-sloping bed, extending >150 km upstream into the ~1.8 km deep Robin Subglacial Basin, placing it at the threshold of marine ice-sheet instability. Understanding IIS vulnerability has focused on the effect
Martin J. Siegert, Neil Ross, Jilu Li, Dustin M. Schroeder, David Rippin, David Ashmore, Robert Bingham, Prasad Gogineni   +7 more
doaj   +1 more source

Former dynamic behaviour of a cold-based valley glacier on Svalbard revealed by basal ice and structural glaciology investigations [PDF]

, 2015
H.L. was funded by a UK Natural Environment Research Council (NERC) PhD studentship (NE/I528050/1), the Queen Mary Postgraduate Research Fund, and an Arctic Field Grant from the Research Council of Norway. E.J.F.
Hubbard, Bryn, Benn, D.I., Hubbard, B., Lovell, Harold, Lovell, H., Fleming, E.J., Lukas, S., Fleming, Edward J., Lukas, Sven, Naegeli, K., Benn, Douglas I., Naegeli, Kathrin   +11 more
core   +2 more sources

Early deglaciation history of the southeastern Baffin Island shelf (Eastern Canadian Arctic Archipelago)

Journal of Quaternary Science, Volume 41, Issue 5, Page 686-701, July 2026.
ABSTRACT During the last glacial period, the Laurentide Ice Sheet (LIS) was the largest terrestrial ice sheet on Earth. Its evolution since the Last Glacial Maximum profoundly influenced Earth's geodynamics and surface processes. Investigating the past dynamics of the LIS provides critical insights into how contemporary ice sheets may respond to ...
Alexis P. Belko, Alexandre Normandeau, Patrick Lajeunesse, Audrey Limoges   +3 more
wiley   +1 more source