Results 171 to 180 of about 2,118,018 (212)

The geological history and evolution of West Antarctica

Nature Reviews Earth & Environment, 2020
West Antarctica has formed the tectonically active margin between East Antarctica and the Pacific Ocean for almost half a billion years, where it has recorded a dynamic history of magmatism, continental growth and fragmentation. Despite the scale and importance of West Antarctica, there has not been an integrated view of the geology and tectonic ...
Jordan, Tom A., Riley, Teal R., Siddoway, Christine   +2 more
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Observed magnetic declinations in West Antarctica

Journal of Geophysical Research, 1961
During the past four austral summers the United States has maintained an active oversnow and airborne traverse program in West Antarctica and on the adjoining Ross and Filchner ice shelves. Six of these traverses included as part of their objectives periodic determinations of magnetic declination D.
Ned A. Ostenso, Charles R. Bentley
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Depth to magnetic ‘basement’ in west Antarctica

Journal of Geophysical Research, 1963
The results of aeromagnetic flights in a portion of West Antarctica are presented and discussed. On the basis of short-wavelength magnetic anomalies, Byrd basin is shown to represent a geologic boundary. Depth determinations to anomaly sources show the absence of a thick sedimentary rock section within and to the north and west of Byrd basin and ...
John C. Behrendt, R. J. Wold
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Snow surface temperatures in West Antarctica

Antarctic Science, 1994
Snow temperatures measured at around 10 m depth over the period 1957–1992 have been used to derive a map of mean annual snow surface temperature corrected to sea level over the Antarctic Peninsula and Filchner-Ronne Ice Shelf. Multiple linear regression analysis has been used to calculate rates of change with latitude, longitude, altitude and time, for
Morris, E.M., Vaughan, D.G.
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West Antarctica: Problem child of Gondwanaland

Tectonics, 1982
The evolution of West (Lesser) Antarctica and its relation to East (Greater) Antarctica have major implications for global plate interactions, paleoclimate, and paleobiogeography, as well as Gondwanaland reconstruction. Analyses of marine geophysical data still lead to seemingly unacceptable overlap between the Antarctic Peninsula and the South ...
Ian W. D. Dalziel, David H. Elliot
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The distribution of geothermal flux in West Antarctica

2018
The West Antarctic Ice Sheet (WAIS) contains the equivalent of ∼3.3 m of global sea level rise and is the largest ice sheet on Earth grounded almost entirely below sea level. This is a potentially unstable configuration that makes WAIS prone to rapid collapse during interglacial periods, a condition known as marine instability.
Quartini, Enrica, 0000-0001-7485-543X
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Early Cretaceous Uplift in the Ellsworth Mountains of West Antarctica

Science, 1991
Apatite fission-track analysis of samples covering a 4.2-kilometer vertical section from the western flank of Vinson Massif, Antarctica's highest mountain, indicates that the Ellsworth Mountains were uplifted by 4 kilometers or more during the Early Cretaceous following the initial separation of East and West Gondwana and accompanying the opening of ...
P G, Fitzgerald, E, Stump
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Inland Thinning of Pine Island Glacier, West Antarctica

Science, 2001
The Pine Island Glacier (PIG) transports 69 cubic kilometers of ice each year from ∼10% of the West Antarctic Ice Sheet (WAIS). It is possible that a retreat of the PIG may accelerate ice discharge from the WAIS interior. Satellite altimetry and interferometry show that the grounded PIG thinned by up to 1.6 meters per year between 1992 and 1999 ...
Shepherd, Andrew, Wingham, Duncan J., Mansley, Justin A.D., Corr, Hugh F.J.   +3 more
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Structure of West Antarctica

Science, 1960
C. R. Bentley, A. P. Crary, N. A. Ostenso, E. C. Thiel   +3 more
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Will ice sheets collapse in West Antarctica?

Science, 2017
Climate The West Antarctic ice sheet is highly vulnerable to climate warming, raising the specter of substantial sea level rise. In a Perspective, Hulbe examines whether collapse of the ice sheet is inevitable. Models suggest that if the world can rein in fossil fuel emissions and follow a low-emissions pathway, the ice sheet’s retreat may stop ...
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