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Full-Text Articles in Physical Sciences and Mathematics
Ams Radiocarbon Chronology Of Glacier Fluctuations In The South Shetland Islands During The Last Glacial/Interglacial Hemicycle:Implications For Global Climate Change, Brenda L. Hall
University of Maine Office of Research Administration: Grant Reports
This award supports a two year program to produce a new reconstruction of ice extent, elevation and thickness at the Last Glacial Maximum (LGM) for the South Shetland Islands in the Antarctic Peninsula. One field season on Livingston Island will involve mapping the areal extent and geomorphology of glacial drift and determining the elevation and distribution of trimlines. In addition, ice flow direction will be determined by mapping and measuring the elevation of erosional features and the position of erratic boulders. One of the main goals of this work will be to demonstrate whether or not organic material suitable for …
Mri: Acquisition Of A Modern Electron Microprobe At The University Of Maine, Charles V. Guidotti
Mri: Acquisition Of A Modern Electron Microprobe At The University Of Maine, Charles V. Guidotti
University of Maine Office of Research Administration: Grant Reports
This award, made through the Major Research Instrumentation (MRI) Program, provides support for the acquisition of a state-of-the-art electron microprobe (EMP) for the microchemical characterization of geological materials. A new EMP will replace an aging (vintage 1981) ARL SEMQ in the Department of Geological Sciences at the University of Maine. The instrument will facilitate research on a range of topics in metamorphic petrology including, the speciation of Fe and distribution of OH- in metapelites, and light element (i.e. Li, B, Be) partitioning in granulite facies rocks. Research in paleoclimatology will also be enhanced by this instrument. The probe will be …
Collaborative Research: Volcanic Records From The Siple And Taylor Dome Ice Cores, Antarctica, George A. Zielinski
Collaborative Research: Volcanic Records From The Siple And Taylor Dome Ice Cores, Antarctica, George A. Zielinski
University of Maine Office of Research Administration: Grant Reports
The primary goals of this project were to, 1) evaluate the volcanic acidity record in the Siple Dome A (SDMA) and B (SDMB) ice cores and the Taylor Dome ice core available through the sulfate time series developed by the glaciochemistry group at the University of Maine, 2) undertake a continuous scan of the SDMA core and scan specific sections in the SDMB core to locate and analyze volcanic glass to determine glass composition, and thus source eruptions for the glass and potentially for volcanic sulfate found in the same layer, and 3) evaluate specific sections containing volcanic glass in …
Collaborative Research: Did The Laurentine Ice Sheet Control Abrupt Climate Change?, Terence J. Hughes, James L. Fastook, David Bromwich, E. Richard Toracinta
Collaborative Research: Did The Laurentine Ice Sheet Control Abrupt Climate Change?, Terence J. Hughes, James L. Fastook, David Bromwich, E. Richard Toracinta
University of Maine Office of Research Administration: Grant Reports
This is a collaborative project with the University of Maine and Ohio State University. The Principal Investigators will model the late glacial Laurentide Ice Sheet from near steady-state equilibrium at - 25,000 BP (years before present), through reversible stadial/interstadial transitions associated with Laurentide iceberg outbursts (Heinrich events 2 and 1), and across the threshold of irreversible Laurentide collapse after the last iceberg outburst at - 1 1,000 BP (Heinrich event 0). The goals are to determine if ice-sheet changes could have triggered climate changes by abrupt ice sheet change and to investigate the structure of these changes. The Principal Investigators …
Science Management For The United States Component Of The International Trans-Antarctic Expedition, Paul Mayewski
Science Management For The United States Component Of The International Trans-Antarctic Expedition, Paul Mayewski
University of Maine Office of Research Administration: Grant Reports
US ITASE is effectively a polar research vessel. It offers the ground-based opportunities of traditional style traverse travel coupled with the modern technology of GPS, crevasse detecting radar, satellite communications and multi-disciplinary research. By operating as a ground-based transport system US ITASE offers scientists the opportunity to experience the dynamic environment they are studying. US ITASE also offers an important interactive venue for research (currently eleven integrated science projects) similar to that afforded by oceanographic research vessels and large polar field camps, without the cost of the former or the lack of mobility of the latter. More importantly the combination …
Studying Byrd Glacier As A Rock-Floored Ice Stream Ending As A Calving Ice Shelf: Phase I, Terence J. Huges, Roger Hooke, James Fastook
Studying Byrd Glacier As A Rock-Floored Ice Stream Ending As A Calving Ice Shelf: Phase I, Terence J. Huges, Roger Hooke, James Fastook
University of Maine Office of Research Administration: Grant Reports
This award supports a one-year study of the floating part of Byrd Glacier, from its grounding line located halfway up a fjord through the Transantarctic Mountains to the end of its lateral rift zone on the Ross Ice Shelf beyond the fjord. Over this l00 km distance, the side boundary changes from rigid between the fjord sidewalls, to nearly free in the lateral rift zone, to deforming when the rifts are healed and Bryd Glacier becomes fully coupled to the Ross Ice Shelf. The stress field for these changing conditions will be calculated a using a gridpoint finite-element model for …