Results 71 to 80 of about 487,910 (214)

Modelling erratic dispersal accounting for shifting ice flow geometries: A new method and explanations of erratic dispersal of the British–Irish Ice Sheet

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Glacial erratics are geologically distinctive rocks transported away from their source area by ice sheets and deposited in lithologically different bedrock areas. They have attracted much scientific curiosity with >24 000 observations across the British Isles.
R. L. Veness   +5 more
wiley   +1 more source

Hydrological and Kinematic Precursors of the 2017 Calving Event at the Petermann Glacier in Greenland Observed from Multi-Source Remote Sensing Data

open access: yesRemote Sensing, 2021
Both a decrease of sea ice and an increase of surface meltwater, which may induce ice-flow speedup and frontal collapse, have a significant impact on the stability of the floating ice shelf in Greenland.
Daan Li, Liming Jiang, Ronggang Huang
doaj   +1 more source

Sense‐Making Phenomena‐Based Planning: Development of Professional Vision on Ambitious Science Teaching

open access: yesScience Education, EarlyView.
ABSTRACT In the era of the Framework for K‐12 Science Education and Next Generation Science Standards (NGSS), research on preparing preservice science teachers (PSTs) for NGSS‐aligned teaching practices is important. In this study, we explored PSTs' sense‐making around planning for Ambitious Science Teaching (AST) during their discussions of teaching ...
Arzu Tanis Ozcelik, Scott McDonald
wiley   +1 more source

Sensitivity of a calving glacier to ice–ocean interactions under climate change: new insights from a 3-D full-Stokes model

open access: yesThe Cryosphere, 2019
. Iceberg calving accounts for between 30 % and 60 % of net mass loss from the Greenland Ice Sheet, which has intensified and is now the single largest contributor to global sea level rise in the cryosphere.
J. Todd   +4 more
semanticscholar   +1 more source

A high‐altitude thermal infrared method for estimating moose abundance and demography in Rocky Mountain National Park, USA

open access: yesWildlife Biology, EarlyView.
Resource managers require accurate estimates of large herbivore abundance and demography to maintain ecological integrity. Common methods to count these species, including observations from low altitude helicopter flights, may conflict with other protected area management objectives and struggle to produce precise estimates for more cryptic species. To
Hanem G. Abouelezz, N. Thompson Hobbs
wiley   +1 more source

De Geer moraine internal architecture based on sedimentological and geophysical investigations and implications for ice‐marginal reconstructions

open access: yesBoreas, EarlyView.
De Geer moraines may act as valuable ice‐marginal indicators; however, to date, their variable mode of formation has presented challenges for this utility. Here, we present sedimentological and ground penetrating radar data of DGMs located in southwest Finland.
Gwyneth E. Rivers   +5 more
wiley   +1 more source

Calving rate linearly dependent on sub-aerial terminus cliff height at tidewater glaciers around the Antarctic Peninsula

open access: yesAnnals of Glaciology
Calving is the process of ice loss through the breaking of ice from a glacier’s terminus. Ice-flow models describe calving in various ways, although no consensus exists on the optimal approach.
Richard Parsons   +2 more
doaj   +1 more source

Calving of Fuerza Aérea Glacier (Greenwich Island, Antarctica) observed with terrestrial laser scanning and continuous video monitoring

open access: yesJournal of Glaciology, 2016
A short-term series of quantitative observations of calving activity of Fuerza Aérea Glacier (Greenwich Island, the South Shetland Islands, Antarctica) was conducted in order to test new methods of monitoring calving.
MICHAŁ PĘTLICKI, CHRISTOPHE KINNARD
doaj   +1 more source

Ice calving and deformation from Antarctic Ice margins using RISAT-1 circular polarization SAR data

open access: yes, 2014
In the present study, quantification of spatial and temporal changes has been carried out between Indian Antarctic Research station Bharati and Amery ice shelf by monitoring the ice margins using RISAT-1 Synthetic Aperture Radar (SAR) data.
P. Jayaprasad   +5 more
semanticscholar   +1 more source

Iceberg calving from the Amery Ice Shelf, East Antarctica [PDF]

open access: yesAnnals of Glaciology, 2002
AbstractWe investigate the iceberg-calving cycle of the Amery Ice Shelf (AIS), East Antarctica, using evidence acquired between 1936 and 2000. The most recent major iceberg-calving event occurred between late 1963 and early 1964, when a large berg totalling about 10 000 km2 in area broke from the ice front.
Helen A. Fricker   +3 more
openaire   +2 more sources

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