Results 1 to 10 of about 663 (126)
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica [PDF]
Journal of Geophysical Research F: 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.
Bruce C Frederick +2 more
exaly +4 more sources
Coring of Antarctic Subglacial Sediments [PDF]
Journal of Marine Science and Engineering, 2019 Coring sediments in subglacial aquatic environments offers unique opportunities for research on paleo-environments and paleo-climates because it can provide data from periods even earlier than ice cores, as well as the overlying ice histories, interactions between ice and the water system, life forms in extreme habitats, sedimentology, and stratigraphy.
Gong Da, Fan Xiaopeng, Smith Emma C
exaly +6 more sources
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. Here we investigate the role of microbially mediated sulfur transformations in sediments from Subglacial Lake ...
Jill A Mikucki +2 more
exaly +4 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
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 ...
Damsgaard, Anders +5 more
+8 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
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
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
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A numerical model for fluvial transport of subglacial sediment [PDF]
Journal of Geophysical Research: Earth Surface, 2019 ISSN:0196 ...
Delaney, Ian A. +2 more
openaire +4 more sources
Technologies for retrieving sediment cores in Antarctic subglacial settings [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2016 Accumulations of sediment beneath the Antarctic Ice Sheet contain a range of physical and chemical proxies with the potential to document changes in ice sheet history and to identify and characterize life in subglacial settings. Retrieving subglacial sediments and sediment cores presents several unique challenges to existing technologies.
Hodgson, Dominic A. +14 more
openaire +5 more sources