Zobrazeno 1 - 10
of 66
pro vyhledávání: '"MATTHEW R. SIEGFRIED"'
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 22, Pp n/a-n/a (2023)
Abstract Open ocean areas surrounded by sea ice and maintained by ocean heat, or sensible‐heat polynyas, are linked to key ice‐sheet processes, such as ice‐shelf basal melt and ice‐shelf fracture, when they occur near ice‐shelf fronts. Howe
Externí odkaz:
https://doaj.org/article/c253500752b94cef931a63bea249432d
Autor:
Christina L. Davis, Ryan A. Venturelli, Alexander B. Michaud, Jon R. Hawkings, Amanda M. Achberger, Trista J. Vick-Majors, Brad E. Rosenheim, John E. Dore, August Steigmeyer, Mark L. Skidmore, Joel D. Barker, Liane G. Benning, Matthew R. Siegfried, John C. Priscu, Brent C. Christner, the SALSA Science Team
Publikováno v:
ISME Communications, Vol 3, Iss 1, Pp 1-11 (2023)
Abstract Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WAIS
Externí odkaz:
https://doaj.org/article/fb43de337f6447d8a56cf6e27a47f8d9
Autor:
Ryan A. Venturelli, Brenna Boehman, Christina Davis, Jon R. Hawkings, Sarah E. Johnston, Chloe D. Gustafson, Alexander B. Michaud, Cyrille Mosbeux, Matthew R. Siegfried, Trista J. Vick‐Majors, Valier Galy, Robert G. M. Spencer, Sophie Warny, Brent C. Christner, Helen A. Fricker, David M. Harwood, Amy Leventer, John C. Priscu, Brad E. Rosenheim, SALSA Science Team
Publikováno v:
AGU Advances, Vol 4, Iss 2, Pp n/a-n/a (2023)
Abstract Projections of Antarctica's contribution to future sea level rise are associated with significant uncertainty, in part because the observational record is too short to capture long‐term processes necessary to estimate ice mass changes over
Externí odkaz:
https://doaj.org/article/dcd6f4badad043bca4fa13aed850b593
Autor:
John C. Priscu, Jonas Kalin, John Winans, Timothy Campbell, Matthew R. Siegfried, Mark Skidmore, John E. Dore, Amy Leventer, David M. Harwood, Dennis Duling, Robert Zook, Justin Burnett, Dar Gibson, Edward Krula, Anatoly Mironov, Jim McManis, Graham Roberts, Brad E. Rosenheim, Brent C. Christner, Kathy Kasic, Helen A. Fricker, W. Berry Lyons, Joel Barker, Mark Bowling, Billy Collins, Christina Davis, Al Gagnon, Christopher Gardner, Chloe Gustafson, Ok-Sun Kim, Wei Li, Alex Michaud, Molly O. Patterson, Martyn Tranter, Ryan Venturelli, Trista Vick-Majors, Cooper Elsworth
Publikováno v:
Annals of Glaciology, Vol 62, Pp 340-352 (2021)
The Subglacial Antarctic Lakes Scientific Access (SALSA) Project accessed Mercer Subglacial Lake using environmentally clean hot-water drilling to examine interactions among ice, water, sediment, rock, microbes and carbon reservoirs within the lake w
Externí odkaz:
https://doaj.org/article/39e16336c1ca4fa490c7bca21450f9f6
Publikováno v:
Annals of Glaciology, Vol 61, Pp 74-83 (2020)
Here we use polarimetric measurements from an Autonomous phase-sensitive Radio-Echo Sounder (ApRES) to investigate ice fabric within Whillans Ice Stream, West Antarctica. The survey traverse is bounded at one end by the suture zone with the Mercer Ic
Externí odkaz:
https://doaj.org/article/a099c7635758466585bce37be0f0d791
Publikováno v:
Annals of Glaciology, Vol 61, Pp 206-213 (2020)
Fast ice flow on the Antarctic continent constitutes much of the mass loss from the ice sheet. However, geophysical methods struggle to constrain ice flow history at depth, or separate the signatures of topography, ice dynamics and basal conditions o
Externí odkaz:
https://doaj.org/article/8fff51a672d44bdf9e715bc7e320a178
Autor:
Matthew R. Siegfried, Helen A. Fricker
Publikováno v:
Annals of Glaciology, Vol 59, Pp 42-55 (2018)
The ability to detect the surface expression of moving water beneath the Antarctic ice sheet by satellite has revealed a dynamic basal environment, with implications for regional ice dynamics, grounding-line stability, and fluxes of freshwater and nu
Externí odkaz:
https://doaj.org/article/3b7461eaa8b24006a974dcdfe1b78c02
Autor:
ANDERS DAMSGAARD, JENNY SUCKALE, JAN A. PIOTROWSKI, MORGANE HOUSSAIS, MATTHEW R. SIEGFRIED, HELEN A. FRICKER
Publikováno v:
Journal of Glaciology, Vol 63, Pp 1034-1048 (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
Externí odkaz:
https://doaj.org/article/f713897efd4948f2ad17c0cc488d1640
Autor:
KERRY KEY, MATTHEW R. SIEGFRIED
Publikováno v:
Journal of Glaciology, Vol 63, Pp 755-771 (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. Ground-based electromagnetic (EM) geophysical metho
Externí odkaz:
https://doaj.org/article/e17458a25e3d426ab2fe794316d0d004
Autor:
Hannah Verboncoeur, Matthew R. Siegfried, Nicholas Holschuh, J. Paul Winberry, Duncan Byrne, Wilson Sauthoff, Tyler C. Sutterley, Brooke Medley
Publikováno v:
Journal of Glaciology, Pp 1-27
Externí odkaz:
https://doaj.org/article/75923ec56c664be19a2e7342ab5f4783