Zobrazeno 1 - 10
of 288
pro vyhledávání: '"Martin J. Siegert"'
Autor:
Shinan Lang, Mingzhu Yang, Xiangbin Cui, Lin Li, Xiaofeng Wang, Jingxue Guo, Jamin S. Greenbaum, Bo Sun, Martin J. Siegert
Publikováno v:
Journal of Glaciology, Vol 71 (2025)
Ridge B is one of the least studied areas in Antarctica but has been considered to be a potential location for the oldest ice on Earth. Among important parameters for calculating where very old ice may exist, geothermal heat flux (GHF) is critical bu
Externí odkaz:
https://doaj.org/article/cf18c9dadfb44709b9986ce5a870ecce
Autor:
Stewart S. R. Jamieson, Neil Ross, Guy J. G. Paxman, Fiona J. Clubb, Duncan A. Young, Shuai Yan, Jamin Greenbaum, Donald D. Blankenship, Martin J. Siegert
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-12 (2023)
Abstract The East Antarctic Ice Sheet (EAIS) has its origins ca. 34 million years ago. Since then, the impact of climate change and past fluctuations in the EAIS margin has been reflected in periods of extensive vs. restricted ice cover and the modif
Externí odkaz:
https://doaj.org/article/6055859aefcc4f1c87517a5b85bbf38e
Autor:
Martin J. Siegert, Mike J. Bentley, Angus Atkinson, Thomas J. Bracegirdle, Peter Convey, Bethan Davies, Rod Downie, Anna E. Hogg, Caroline Holmes, Kevin A. Hughes, Michael P. Meredith, Neil Ross, Jane Rumble, Jeremy Wilkinson
Publikováno v:
Frontiers in Environmental Science, Vol 11 (2023)
There is increasing evidence that fossil-fuel burning, and consequential global heating of 1.1°C to date, has led to the increased occurrence and severity of extreme environmental events. It is well documented how such events have impacted society o
Externí odkaz:
https://doaj.org/article/b4239950cf0f47e2b455cb4e84cd544b
Autor:
Shinan Lang, Ben Xu, Xiangbin Cui, Kun Luo, Jingxue Guo, Xueyuan Tang, Yiheng Cai, Bo Sun, Martin J. Siegert
Publikováno v:
Journal of Glaciology, Vol 67, Pp 560-568 (2021)
During the last few decades, bed-elevation profiles from radar sounders have been used to quantify bed roughness. Various methods have been employed, such as the ‘two-parameter’ technique that considers vertical and slope irregularities in topogr
Externí odkaz:
https://doaj.org/article/41bebf03000244df9332dd2fa582d282
Autor:
Ian M. Shoemaker, Alexander Kusenko, Peter Kuipers Munneke, Andrew Romero-Wolf, Dustin M. Schroeder, Martin J. Siegert
Publikováno v:
Annals of Glaciology, Vol 61, Pp 92-98 (2020)
The Antarctic Impulsive Transient Antenna (ANITA) balloon experiment was designed to detect radio signals initiated by high-energy neutrinos and cosmic ray (CR) air showers. These signals are typically discriminated by the polarization and phase inve
Externí odkaz:
https://doaj.org/article/2df485aba40a4013b3afd3ae6544d9b1
Autor:
Bangbing Wang, Bo Sun, Jiaxin Wang, Jamin Greenbaum, Jingxue Guo, Laura Lindzey, Xiangbin Cui, Duncan A. Young, Donald D. Blankenship, Martin J. Siegert
Publikováno v:
Annals of Glaciology, Vol 61, Pp 124-134 (2020)
Radio-echo sounding (RES) can be used to understand ice-sheet processes, englacial flow structures and bed properties, making it one of the most popular tools in glaciological exploration. However, RES data are often subject to ‘strip noise’, cau
Externí odkaz:
https://doaj.org/article/1bf237a1e8dd4fad90b1c9f187ea8e8a
Publikováno v:
Annals of Glaciology, Vol 61, Pp 188-197 (2020)
Numerical ice-sheet models are commonly matched to surface ice velocities from InSAR measurements by modifying basal drag, allowing the flow and form of the ice sheet to be simulated. Geophysical measurements of the bed are rarely used to examine if
Externí odkaz:
https://doaj.org/article/5be9410e9f254fc59855dfc03472dc18
Autor:
Dustin M. Schroeder, Robert G. Bingham, Donald D. Blankenship, Knut Christianson, Olaf Eisen, Gwenn E. Flowers, Nanna B. Karlsson, Michelle R. Koutnik, John D. Paden, Martin J. Siegert
Publikováno v:
Annals of Glaciology, Vol 61, Pp 1-13 (2020)
Radar sounding is a powerful geophysical approach for characterizing the subsurface conditions of terrestrial and planetary ice masses at local to global scales. As a result, a wide array of orbital, airborne, ground-based, and in situ instruments, p
Externí odkaz:
https://doaj.org/article/0fdaae4326be4c03a6b2e259132b85d9
Autor:
Madison L. Goldberg, Dustin M. Schroeder, Davide Castelletti, Elisa Mantelli, Neil Ross, Martin J. Siegert
Publikováno v:
Annals of Glaciology, Vol 61, Pp 242-248 (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 pro
Externí odkaz:
https://doaj.org/article/3a2ed0b7ddc74c5c873247ad78c4b768
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Lake CookE2, upstream of Cook Glacier in East Antarctica, is an “active” subglacial lake that experiences episodic discharge and recharge of basal water. Although around 130 active lakes are known to exist, the majority are not able to be identif
Externí odkaz:
https://doaj.org/article/45c9ff20b9824eaeb40e59edef355ba8