Results 41 to 50 of about 145,942 (141)

Modeling the Subglacial Sediment System of the Finnish Lake District Ice Lobe During Deglaciation [PDF]

The Cryosphere
The systematic connection of glacial conditions in ice models with subglacial geomorphological observations has been limited by an inability to model subglacial sediment processes.
A. R. A. Aitken, A. R. A. Aitken, A. J. Hepburn, A. E. K. Ojala, A. E. K. Ojala   +4 more
doaj   +1 more source

Intercomparison of surface meltwater routing models for the Greenland ice sheet and influence on subglacial effective pressures [PDF]

The Cryosphere, 2020
Each summer, large volumes of surface meltwater drain off the Greenland ice sheet (GrIS) surface through moulins to the bed, impacting subglacial hydrology and ice flow dynamics.
K. Yang, K. Yang, A. Sommers, L. C. Andrews, L. C. Smith, L. C. Smith, X. Lu, X. Lu, X. Fettweis, M. Li, M. Li   +10 more
doaj   +1 more source

Influence of subglacial drainage system evolution on glacier surface motion: Haut Glacier d'Arolla, Switzerland [PDF]

, 2002
The relationship between the evolution of subglacial drainage system morphology and spatial patterns of glacier surface velocity was investigated using dye tracing experiments and ground surveying throughout the 1995 melt season at Haut Glacier d'Arolla,
Ian Willis, Sharp, M., Wohlleben, T., Peter Nienow, Mair, D., Martin Sharp, Willis, I., Trudy Wohlleben, Douglas Mair, Nienow, P.   +9 more
core   +1 more source

Modeling Antarctic subglacial lake filling and drainage cycles [PDF]

The Cryosphere, 2016
The growth and drainage of active subglacial lakes in Antarctica has previously been inferred from analysis of ice surface altimetry data. We use a subglacial hydrology model applied to a synthetic Antarctic ice stream to examine internal controls on the
C. F. Dow, M. A. Werder, S. Nowicki, R. T. Walker   +3 more
doaj   +1 more source

Subglacial hydrology modeling predicts high winter water pressure and spatially variable transmissivity at Helheim Glacier, Greenland

Journal of Glaciology, 2023
Water pressure beneath glaciers influences ice velocity. Subglacial hydrology models are helpful for gaining insight into basal conditions, but models depend on unconstrained parameters, and a current challenge is reproducing elevated water pressures in ...
Aleah Sommers, Colin Meyer, Mathieu Morlighem, Harihar Rajaram, Kristin Poinar, Winnie Chu, Jessica Mejia   +6 more
doaj   +1 more source

SUHMO: an AMR SUbglacial Hydrology MOdel v1.0

, 2022
Abstract. Water flowing under ice sheets and glaciers can have a strong influence on ice dynamics, particularly through pressure changes, suggesting that a comprehensive ice sheet model should include the effect of basal hydrology. Modeling subglacial hydrology remains a challenge however, mainly due to the range of spatial and temporal scales involved -
Anne M. Felden, Daniel F. Martin, Esmond G. Ng   +2 more
openaire   +1 more source

Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network

The Cryosphere, 2022
The presence of subglacial lakes and subglacial hydrological networks under the East and West Antarctic ice sheets is now relatively well understood, whilst their influence on ice dynamics is the subject of ongoing research. In contrast, little is known about subglacial lakes and hydrological networks under the Antarctic Peninsula Ice Sheet and how ...
Hodgson, Dominic A., Jordan, Tom A., Ross, Neil, Riley, Teal R., Fretwell, Peter   +4 more
openaire   +5 more sources

The Importance of Solving Subglaciar Hydrology in Modeling Glacier Retreat: A Case Study of Hansbreen, Svalbard

Hydrology
Arctic tidewater glaciers are retreating, serving as key indicators of global warming. This study aims to assess how subglacial hydrology affects glacier front retreat by comparing two glacier–fjord models of the Hansbreen glacier: one incorporating a ...
Eva De Andrés, José M. Muñoz-Hermosilla, Kaian Shahateet, Jaime Otero   +3 more
doaj   +1 more source

Tidal Grounding‐Line Migration Modulated by Subglacial Hydrology [PDF]

Geophysical Research Letters, 2020
AbstractWe present a mathematical model of the hydrology of grounding‐line migration on tidal timescales, in which the ice acts elastically, overlying a connected hydrological network, with the ocean tides modeled by an oscillating far‐field fluid height. The upstream grounding‐line migration is driven by a fluid pressure gradient through the grounding
Warburton, KLP, Hewitt, DR, Neufeld, JA
openaire   +1 more source

Introducing a ramped pyrolysis/oxidation‐14CO2 analysis system operated with mobile molecular sieve traps

Limnology and Oceanography: Methods, EarlyView.
Abstract A novel instrument for the thermal degradation of sedimentary organic matter was set up at the Alfred Wegener Institute (AWI) in Bremerhaven, Germany, with the aim of enabling Ramped Pyrolysis/Oxidation‐14C analysis as direct CO2 gas measurement.
Laura Kattein, Malte Höhn, Hendrik Grotheer, Torben Gentz, Gesine Mollenhauer   +4 more
wiley   +1 more source