Microbial sulfur transformations in sediments from Subglacial Lake Whillans [PDF]
Frontiers in Microbiology, 2014 Diverse microbial assemblages inhabit subglacial aquatic environments. While few of these environments have been sampled, data reveal that subglacial organisms gain energy for growth from reduced minerals containing nitrogen, iron, and sulfur.
Alicia M Purcell +13 more
doaj +3 more sources
Sediment behavior controls equilibrium width of subglacial channels [PDF]
Journal of Glaciology, 2017 Flow-frictional resistance at the base of glaciers and ice sheets is strongly linked to subglacial water pressure. Understanding the physical mechanisms that govern meltwater fluxes in subglacial channels is hence critical for constraining variations in ...
ANDERS DAMSGAARD +5 more
doaj +2 more sources
Discrete element modeling of subglacial sediment deformation [PDF]
Journal of Geophysical Research: Earth Surface, 2013 The Discrete Element Method (DEM) is used in this study to explore the highly nonlinear dynamics of a granular bed when exposed to stress conditions comparable to those at the bed of warm-based glaciers. Complementary to analog experiments, the numerical approach allows a detailed analysis of the material dynamics and the shear zone development during ...
Anders Damsgaard +5 more
+7 more sources
Ploughing of subglacial sediment [PDF]
Journal of Glaciology, 1994 Abstract Mechanical conditions at the base of Trapridge Glacier, Yukon Territory, were investigated using a “ploughmeter”. We describe the physical characteristics and the theory of this new instrument as well as its operation.
URS H. Fischer, Garry K. C. Clarke
openaire +1 more source
Journal of Glaciology, 2021 The recently-advancing Taku Glacier is excavating subglacial sediments at high rates over multi-decadal timescales. However, sediment redistribution over shorter timescales remains unquantified.
Jenna M. Zechmann +4 more
doaj +1 more source
Subglacial Sediment Plumes in Greenland
, 2022 This is a data dump of the output from the Bachelor of Science Senior Thesis "Subglacial Sediment Plumes in Greenland" ( https://scholarsphere.psu.edu/resources/1315c9d5-83bf-4c53-a502-766d63f56e70)
John P Dibert, Dr. Ken Mankoff
openaire +2 more sources
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica [PDF]
Journal of Geophysical Research: Earth Surface, 2016 AbstractTopography, sediment distribution, and heat flux are all key boundary conditions governing the dynamics of the East Antarctic Ice Sheet (EAIS). EAIS stability is most at risk in Wilkes Land across vast expanses of marine‐based catchments including the 1400 km × 600 km expanse of the Wilkes Subglacial Basin (WSB) region.
Frederick, Bruce C. +6 more
openaire +3 more sources
Geophysical Monograph Series, Page 117-131., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Benjamin Black +4 more
wiley +1 more source
Tracking coarse sediment in an Alpine subglacial channel using radio-tagged particles
Journal of Glaciology, 2023 We present a method for tracking radio-tagged pebbles and cobbles through subglacial meltwater channels under shallow temperate glaciers. Natural particles tagged with active radio transmitters were injected directly into a large subglacial channel 300 m
Matt Jenkin +6 more
doaj +1 more source
Sediment oxygen consumption in
Limnology and Oceanography, 2023 AbstractOxygen consumption in aquatic sediments is an indicator of overall biological activity of the ecosystem. As such, rates of sedimentary oxygen utilization are well documented for much of the open oceans and freshwater lakes. However, there are few direct measurements of sedimentary oxygen consumption from Antarctic subglacial aquatic sediments ...
Alexander B. Michaud, John C. Priscu
openaire +2 more sources