Results 81 to 90 of about 19,515,932 (251)
Boreas, EarlyView.The last (Wisconsinan) glacial period was punctuated in North America by two glacial maxima, known as the Early and Late Wisconsinan glaciations. In Alaska, these maxima and their subsequent retreats have been the object of dating efforts to reconstruct local climatic events and compare them to global trends.
Bruno Belotti +5 more
wiley +1 more source
Characterization of glacial silt and clay using automated mineralogy
Annals of Glaciology, 2019 Glacial erosion produces vast quantities of fine-grained sediment that has a far-reaching impact on Earth surface processes. To gain a better understanding of the production of glacial silt and clay, we use automated mineralogy to quantify the ...
Jeff W. Crompton +2 more
doaj +1 more source
Boreas, EarlyView.Glacial erosion during the Last Glacial Maximum (LGM) has removed much evidence of earlier glaciations and interglacials in the European Alps. At Gröbminger Mitterberg (GM), beneath a blanket of LGM till, a distinctive sediment archive preserves deposits predating the LGM.
Gerit E. U. Griesmeier +7 more
wiley +1 more source
Boreas, EarlyView.The interaction between glaciers and the debris accumulating on their surfaces is critical as the Earth warms, with consequences for ice dynamics, hydrology and mass balance together with slope and sedimentary processes. Understanding this interaction is necessary since it influences ablation rates, sediment and meltwater pathways.
Paulina Mejías Osorio +5 more
wiley +1 more source
Seasonal variations in Greenland Ice Sheet motion : Inland extent and behaviour at higher elevations [PDF]
, 2011 Peer ...
Bartholomew, I. D. +6 more
core +2 more sources
Journal of Glaciology, 2018 Over recent decades, Greenland ice sheet surface melt has shown an increase both in intensity and spatial extent. Part of this water probably reaches the bed and can enhance glacier speed, advecting a larger volume of ice into the ablation area.
OLIVIER GAGLIARDINI, MAURO A. WERDER
doaj +1 more source
Geological and glacial-hydrologic controls on chemical weathering in the subglacial environment
Annals of Glaciology, 2022 A comparison of major ion chemistry of subglacial boreholes and discharging subglacial waters reveals three fundamentally different glacier hydrochemical regimes.
Joseph A. Graly, Soroush Rezvanbehbahani
doaj +1 more source
Boreas, EarlyView.We analyse the geological processes of a coastal embayment in the Kattegat. Using high‐resolution seismic data and sediment cores, we describe a geological evolution from glacial to shallow marine stages with a variety of preserved facies from different depositional settings, including glacio‐lacustrine, telmatic, limnic and coastal environments.
Katrine Juul Andresen +8 more
wiley +1 more source
Modeling saline-fluid flow through subglacial channels [PDF]
The CryosphereSubglacial hydrological systems impact ice dynamics, biological environments, and sediment transport. Previous numerical models of channelized subglacial flow have focused on freshwater in temperate ice without considering variable fluid chemistry and ...
A. Jenson +5 more
doaj +1 more source
GHOSTly flute music: drumlins, moats and the bed of Thwaites Glacier
Annals of Glaciology, 2022 Glacier-bed characteristics that are poorly known and modeled are important in projected sea-level rise from ice-sheet changes under strong warming, especially in the Thwaites Glacier drainage of West Antarctica.
Richard B. Alley +9 more
doaj +1 more source