Results 21 to 30 of about 158 (137)

An englacial hydrologic system of brine within a cold glacier: Blood Falls, McMurdo Dry Valleys, Antarctica

Journal of Glaciology, 2017
Taylor Glacier hosts an active englacial hydrologic system that feeds Blood Falls, a supraglacial outflow of iron-rich subglacial brine at the terminus, despite mean annual air temperatures of −17°C and limited surface melt.
JESSICA A. BADGELEY, ERIN C. PETTIT, CHRISTINA G. CARR, SLAWEK TULACZYK, JILL A. MIKUCKI, W. BERRY LYONS   +5 more
doaj   +1 more source

A comparison of contemporaneous airborne altimetry and ice-thickness measurements of Antarctic ice shelves

Journal of Glaciology, 2023
Estimates of ice shelf mass loss are typically based on surface height measurements, assuming hydrostatic equilibrium and estimated firn thickness.
Allison M. Chartrand, Ian M. Howat
doaj   +1 more source

ImpDAR: an open-source impulse radar processor

Annals of Glaciology, 2020
Despite widespread use of radio-echo sounding (RES) in glaciology and broad distribution of processed radar products, the glaciological community has no standard software for processing impulse RES data.
David A. Lilien, Benjamin H. Hills, Joshua Driscol, Robert Jacobel, Knut Christianson   +4 more
doaj   +1 more source

Towards a common terminology in radioglaciology

Annals of Glaciology, 2022
Over the past 70 years, many different components of the cryosphere have been imaged with a variety of radar systems using increasingly sophisticated processing techniques.
Rebecca Schlegel, Bernd Kulessa, Tavi Murray, Olaf Eisen   +3 more
doaj   +1 more source

Polarimetric multi-offset radio-echo sounding with a radio frequency-over-fiber ApRES system

Journal of Glaciology
Polarimetric multi-offset radio-echo sounding offers improved constraints on englacial thermal conditions, basal properties and ice crystal orientation compared to standard monostatic observations.
Daniel F. May, Dustin M. Schroeder, Paul T. Summers, Thomas O. Teisberg, Anna L. Broome, Nicole L. Bienert, Jaiden Zak, Tun Jan Young, Marianne S. Karplus, Slawek M. Tulaczyk   +9 more
doaj   +1 more source

A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake

Annals of Glaciology, 2020
All radar power interpretations require a correction for attenuative losses. Moreover, radar attenuation is a proxy for ice-column properties, such as temperature and chemistry. Prior studies use either paired thermodynamic and conductivity models or the
Benjamin H. Hills, Knut Christianson, Nicholas Holschuh   +2 more
doaj   +1 more source

Inversion for the density–depth profile of Dome A, East Antarctica, using frequency-modulated continuous wave radar

Journal of Glaciology, 2021
The density–depth relationship of the Antarctic ice sheet is important for establishing a high-precision surface mass balance model and predicting future ice-sheet contributions to global sea levels.
Wangxiao Yang, Yinke Dou, Bo Zhao, Jingxue Guo, Xueyuan Tang, Guangyu Zuo, Yuchen Wang, Yan Chen, Yuzhong Zhang   +8 more
doaj   +1 more source

Automated detection and characterization of Antarctic basal units using radar sounding data: demonstration in Institute Ice Stream, West Antarctica

Annals of Glaciology, 2020
Basal units – visibly distinct englacial structures near the ice-bed interface – warrant investigation for a number of reasons. Many are of unknown composition and origin, characteristics that could provide substantial insight into subglacial processes ...
Madison L. Goldberg, Dustin M. Schroeder, Davide Castelletti, Elisa Mantelli, Neil Ross, Martin J. Siegert   +5 more
doaj   +1 more source

Ostracod faunal and geochemical evidence for the impact of Hoxnian (MIS 11c) sea levels in eastern England

Journal of Quaternary Science, EarlyView.
ABSTRACT Marine isotope substage 11c (~426–366 ka) is widely regarded as the most recent Pleistocene interglacial that is broadly analogous to the Holocene. The timing and magnitude of sea‐level changes during MIS 11 have been much debated, particularly concerning whether sea levels were significantly higher than during the Holocene. Empirical evidence
Tom S. White, Jonathan A. Holmes, David J. Horne, David R. Bridgland   +3 more
wiley   +1 more source

Assessing the subglacial lake coverage of Antarctica

Annals of Glaciology, 2016
Lakes beneath the Antarctic Ice Sheet are known to decrease traction at the ice base and therefore can have a great impact on ice dynamics. However, the total extent of Antarctic subglacial lakes is still unknown.
Sebastian Goeller, Daniel Steinhage, Malte Thoma, Klaus Grosfeld   +3 more
doaj   +1 more source