Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Glaciological model experiments"'
Autor:
Emily Schwans, Byron R. Parizek, Richard B. Alley, Sridhar Anandakrishnan, Mathieu M. Morlighem
Publikováno v:
Journal of Glaciology, Vol 69, Pp 1241-1259 (2023)
Thwaites Glacier (TG) plays an important role in future sea-level rise (SLR) contribution from the West Antarctic Ice Sheet. Recent observations show that TG is losing mass, and its grounding zone is retreating. Previous modeling has produced a wide
Externí odkaz:
https://doaj.org/article/49c795a45d994bd7befe71ea2df13313
Publikováno v:
Journal of Glaciology, Vol 69, Pp 1393-1402 (2023)
Initialising model glaciers such that they match well with their real counterparts and are thus able to make more accurate predictions is an ongoing challenge in glacier modelling. We set out a data-assimilation approach using an ensemble Kalman filt
Externí odkaz:
https://doaj.org/article/5499c82f2e5644d68262e404daa5ca96
Publikováno v:
Journal of Glaciology, Vol 69, Pp 433-444 (2023)
Mass loss at the Greenland Ice Sheet is influenced by atmospheric processes controlling its surface mass balance, and by submarine melt and calving where glaciers terminate in fjords. There, an ice mélange – a composite matrix of calved ice bergs
Externí odkaz:
https://doaj.org/article/bb2130b5821f4a389ccdfe4a3965a011
Publikováno v:
Journal of Glaciology, Vol 69, Pp 513-524 (2023)
In this study, we investigate the differences between two transient, three-dimensional, thermomechanically coupled ice-sheet models, namely, a first-order approximation model (FOM) and a ‘full’ Stokes ice-sheet model (FSM) under the same numerica
Externí odkaz:
https://doaj.org/article/19e4c6a248ac4a5f8c253cfbd7c5d1cb
Autor:
Lou-Anne Chevrollier, Joseph M. Cook, Laura Halbach, Hans Jakobsen, Liane G. Benning, Alexandre M. Anesio, Martyn Tranter
Publikováno v:
Journal of Glaciology, Vol 69, Pp 333-341 (2023)
Pigmented microalgae inhabiting snow and ice environments lower the albedo of glacier and ice-sheet surfaces, significantly enhancing surface melt. Our ability to accurately predict their role in glacier and ice-sheet surface mass balance is limited
Externí odkaz:
https://doaj.org/article/cba51e234e6f4208b7df62652032bf62
Autor:
Maria McQuillan, Leif Karlstrom
Publikováno v:
Journal of Glaciology, Vol 67, Pp 999-1012 (2021)
Englacial water transport is an integral part of the glacial hydrologic system, yet the geometry of englacial structures remains largely unknown. In this study, we explore the excitation of fluid resonance by small amplitude waves as a probe of engla
Externí odkaz:
https://doaj.org/article/b39610eb00464273851f95f4e1963697
Autor:
Douglas R. MacAyeal, Olga V. Sergienko, Alison F. Banwell, Grant J. Macdonald, Ian C. Willis, Laura A. Stevens
Publikováno v:
Journal of Glaciology, Vol 67, Pp 885-902 (2021)
We develop a two-dimensional, plan-view formulation of ice-shelf flow and viscoelastic ice-shelf flexure. This formulation combines, for the first time, the shallow-shelf approximation for horizontal ice-shelf flow (and shallow-stream approximation f
Externí odkaz:
https://doaj.org/article/f560b7c12bff44e4985f1dc2f7373dd1
Autor:
Vasileios Gkinis, Christian Holme, Emma C. Kahle, Max C. Stevens, Eric J. Steig, Bo M. Vinther
Publikováno v:
Journal of Glaciology, Vol 67, Pp 450-472 (2021)
Advances in analytical methods have made it possible to obtain high-resolution water isotopic data from ice cores. Their spectral signature contains information on the diffusion process that attenuated the isotopic signal during the firn densificatio
Externí odkaz:
https://doaj.org/article/563dc54dc42346cfb37df0bc076b6027
Publikováno v:
Journal of Glaciology, Vol 66, Pp 755-765 (2020)
Streaming ice accounts for a major fraction of global ice flux, yet we cannot yet fully explain the dominant controls on its kinematics. In this contribution, we use an anisotropic full-Stokes thermomechanical flow solver to characterize how mechanic
Externí odkaz:
https://doaj.org/article/3bef1268bb694444bf765602f8ece5b2
Publikováno v:
Journal of Glaciology, Vol 66, Pp 643-657 (2020)
The Antarctic Ice Sheet loses mass via its ice shelves predominantly through two processes: basal melting and iceberg calving. Iceberg calving is episodic and infrequent, and not well parameterized in ice-sheet models. Here, we investigate the impact
Externí odkaz:
https://doaj.org/article/0a5997009523444392212e3fe4373f7c