Results 81 to 90 of about 713 (170)

Modeling δD-δ18O Steady-State of Well-Sealed Perennially Ice-Covered Lakes and Their Recharge Source: Examples From Lake Untersee and Lake Vostok, Antarctica

Frontiers in Earth Science, 2020
Perennially ice-covered lakes that are tightly sealed from the atmosphere represent a unique group of polar lakes. In these lakes, the δD-δ18O evolution of the water column and steady-state conditions are controlled by rates of recharge and freezing at ...
Benoit Faucher, Denis Lacelle, David A. Fisher, Klemens Weisleitner, Dale T. Andersen   +4 more
doaj   +1 more source

Continental‐Scale Machine‐Learning Classification of Arctic Glacial Landscapes Using Simple Morphometrics

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 5, May 2026.
Abstract Landscapes formed by glacial erosion have previously been classified based on qualitative interpretation of geomorphic evidence, using aerial photography and field studies. In the current era of high‐resolution elevation data, limited attempts have been made to improve these classifications using quantitative measurements of landscape form (i ...
E. J. Lea, G. J. G. Paxman, F. J. Clubb, N. Ross   +3 more
wiley   +1 more source

Entrained Water in Basal Ice Suppresses Radar Bed‐Echo Power at Active Subglacial Lakes

Geophysical Research Letters
Subglacial lakes have been mapped across Antarctica with two methods, radio‐echo sounding (RES) and ice‐surface deformation. At sites where both are coincident, these methods typically provide conflicting interpretations about the ice‐bed interface. With
B. H. Hills, M. R. Siegfried, D. M. Schroeder   +2 more
doaj   +1 more source

Preliminary Analysis of Life within a Former Subglacial Lake Sediment in Antarctica

Diversity, 2013
Since the first descriptions of Antarctic subglacial lakes, there has been a growing interest and awareness of the possibility that life will exist and potentially thrive in these unique and little known environments. The unusual combination of selection
Gavin Burns, Charles S. Cockell, Michael A. S. Thorne, Dominic A. Hodgson, David A. Pearce   +4 more
doaj   +1 more source

Dynamic flows create potentially habitable conditions in Antarctic subglacial lakes. [PDF]

Sci Adv, 2021
Couston LA, Siegert M.
europepmc   +1 more source

ENVIRONMENT PROTECTION AND ENVIRONMENT MONITORING ISSUES IN THE PROJECTS OF SUBGLACIAL LAKES STUDIES IN ANTARCTICA

Лëд и снег, 2015
Antarctic subglacial lakes can represent extreme natural habitats for microorganisms from the position of their evolution and adaptation, as well as they can contain the information on Antarctic ice sheet history and climatic changes in their sediments ...
I. A. Alekhina, N. I. Vasiliev, V. Ya. Lipenkov   +2 more
doaj   +1 more source

Monitoring Activity of the Subglacial Lake Mercer Based on CryoSat-2 and ICESat-2 Altimetry Data from 2011 to 2023 [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Active subglacial lakes are capable of exchanging and transporting water through water flow paths, thus having an important impact on ice sheet movement and even on the regional mass balance.
P. Luo, P. Luo, G. Qiao, G. Qiao, Z. Qu, Z. Qu, S. Popov, S. Popov   +7 more
doaj   +1 more source

Dynamic Boundaries of Antarctic Active Subglacial Lakes Reveal Underestimated Water Volume Change and Overestimated Lakebed Active Area

Geophysical Research Letters
This study revisited 158 documented active subglacial lakes across Antarctica, applying a height‐change anomaly delineation algorithm to CryoSat‐2 and ICESat‐2 satellite altimetry data to assemble a 14.75‐year (2010.5–2025.25) time series of active ...
W. Sauthoff, M. R. Siegfried, R. A. Venturelli, B. E. Smith   +3 more
doaj   +1 more source

A seismic analysis of subglacial lake D2 (Subglacial Lake Cheongsuk) beneath David Glacier, Antarctica

The Cryosphere
Abstract. Subglacial lakes beneath Antarctic glaciers are pivotal in advancing our understanding of cryosphere dynamics, basal hydrology, and microbial ecosystems. We investigate the internal structure and physical properties of Subglacial Lake D2 (SLD2), which is located beneath David Glacier in East Antarctica, using seismic data acquired during the ...
Hyeontae Ju, Seung-Goo Kang, Yeonjin Choi, Sukjoon Pyun, Min Je Lee, Hoje Kwak, Kwansoo Kim, Yeadong Kim, Jong Ik Lee   +8 more
openaire   +2 more sources

Glacial lakes control ice flow: new insights from satellite SAR PO-SBAS observations in Duiya Glacier, southern Tibetan Plateau

International Journal of Digital Earth
This study investigates the effects of glacial lakes on the flow velocities of Duiya Glacier, southern Tibetan Plateau, by employing satellite Synthetic Aperture Radar (SAR) Pixel-Offset-Tracking Small-Baseline-Subset (PO-SBAS) technology. Duiya Glacier,
Yueling Shi, Tao Che, Jiawen Bao, Xiaowen Wang, Guoxiang Liu, Qiang Bie, Yi He, Renzhe Wu, Dongdong Feng   +8 more
doaj   +1 more source