Search Results - "Graham, Alastair C"

Flow and retreat of the Late Quaternary Pine Island-Thwaites palaeo-ice stream, West Antarctica by Graham, Alastair G. C., Larter, Robert D., Gohl, Karsten, Dowdeswell, Julian A., Hillenbrand, Claus-Dieter, Smith, James A., Evans, Jeffrey, Kuhn, Gerhard, Deen, Tara

“…Multibeam swath bathymetry and sub‐bottom profiler data are used to establish constraints on the flow and retreat history of a major palaeo‐ice stream that…”
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Limited grounding-line advance onto the West Antarctic continental shelf in the easternmost Amundsen Sea Embayment during the last glacial period by Klages, Johann P, Kuhn, Gerhard, Hillenbrand, Claus-Dieter, Smith, James A, Graham, Alastair G C, Nitsche, Frank O, Frederichs, Thomas, Jernas, Patrycja E, Gohl, Karsten, Wacker, Lukas

“…Precise knowledge about the extent of the West Antarctic Ice Sheet (WAIS) at the Last Glacial Maximum (LGM; c. 26.5-19 cal. ka BP) is important in order to 1)…”
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An overview of realist evaluation for simulation-based education by Graham, Alastair C, McAleer, Sean

“…This article describes the key features of realist (realistic) evaluation and illustrates their application using, as an example, a simulation-based course for…”
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Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing by Hogan, Kelly A, Larter, Robert D, Graham, Alastair G. C, Arthern, Robert, Kirkham, James D, Totten Minzoni, Rebecca, Jordan, Tom A, Clark, Rachel, Fitzgerald, Victoria, Wåhlin, Anna K, Anderson, John B, Hillenbrand, Claus-Dieter, Nitsche, Frank O, Simkins, Lauren, Smith, James A, Gohl, Karsten, Arndt, Jan Erik, Hong, Jongkuk, Wellner, Julia

“…The geometry of the sea floor immediately beyond Antarctica's marine-terminating glaciers is a fundamental control on warm-water routing, but it also describes…”
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The marine geological imprint of Antarctic ice shelves by Smith, James A., Graham, Alastair G. C., Post, Alix L., Hillenbrand, Claus-Dieter, Bart, Philip J., Powell, Ross D.

“…Reductions in the thickness and extent of Antarctic ice shelves are triggering increased discharge of marine-terminating glaciers. While the impacts of recent…”
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Diverse landscapes beneath Pine Island Glacier influence ice flow by Bingham, Robert G., Vaughan, David G., King, Edward C., Davies, Damon, Cornford, Stephen L., Smith, Andrew M., Arthern, Robert J., Brisbourne, Alex M., De Rydt, Jan, Graham, Alastair G. C., Spagnolo, Matteo, Marsh, Oliver J., Shean, David E.

“…The retreating Pine Island Glacier (PIG), West Antarctica, presently contributes ~5–10% of global sea-level rise. PIG’s retreat rate has increased in recent…”
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Size, shape and spatial arrangement of mega-scale glacial lineations from a large and diverse dataset by Spagnolo, Matteo, Clark, Chris D., Ely, Jeremy C., Stokes, Chris R., Anderson, John B., Andreassen, Karin, Graham, Alastair G. C., King, Edward C.

“…ABSTRACT Mega‐scale glacial lineations (MSGLs) are a characteristic landform on ice stream beds. Solving the puzzle of their formation is key to understanding…”
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New gravity-derived bathymetry for the Thwaites, Crosson, and Dotson ice shelves revealing two ice shelf populations by Jordan, Tom A, Porter, David, Tinto, Kirsty, Millan, Romain, Muto, Atsuhiro, Hogan, Kelly, Larter, Robert D, Graham, Alastair G. C, Paden, John D

“…Ice shelves play a critical role in the long-term stability of ice sheets through their buttressing effect. The underlying bathymetry and cavity thickness are…”
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Seabed corrugations beneath an Antarctic ice shelf revealed by autonomous underwater vehicle survey: Origin and implications for the history of Pine Island Glacier by Graham, Alastair G. C., Dutrieux, Pierre, Vaughan, David G., Nitsche, Frank O., Gyllencreutz, Richard, Greenwood, Sarah L., Larter, Robert D., Jenkins, Adrian

“…Ice shelves are critical features in the debate about West Antarctic ice sheet change and sea level rise, both because they limit ice discharge and because…”
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Major advance of South Georgia glaciers during the Antarctic Cold Reversal following extensive sub-Antarctic glaciation by Graham, Alastair G. C., Kuhn, Gerhard, Meisel, Ove, Hillenbrand, Claus-Dieter, Hodgson, Dominic A., Ehrmann, Werner, Wacker, Lukas, Wintersteller, Paul, dos Santos Ferreira, Christian, Römer, Miriam, White, Duanne, Bohrmann, Gerhard

“…The history of glaciations on Southern Hemisphere sub-polar islands is unclear. Debate surrounds the extent and timing of the last glacial advance and…”
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The discovery of new deep-sea hydrothermal vent communities in the southern ocean and implications for biogeography by Rogers, Alex D, Tyler, Paul A, Connelly, Douglas P, Copley, Jon T, James, Rachael, Larter, Robert D, Linse, Katrin, Mills, Rachel A, Garabato, Alfredo Naveira, Pancost, Richard D, Pearce, David A, Polunin, Nicholas V C, German, Christopher R, Shank, Timothy, Boersch-Supan, Philipp H, Alker, Belinda J, Aquilina, Alfred, Bennett, Sarah A, Clarke, Andrew, Dinley, Robert J J, Graham, Alastair G C, Green, Darryl R H, Hawkes, Jeffrey A, Hepburn, Laura, Hilario, Ana, Huvenne, Veerle A I, Marsh, Leigh, Ramirez-Llodra, Eva, Reid, William D K, Roterman, Christopher N, Sweeting, Christopher J, Thatje, Sven, Zwirglmaier, Katrin

“…Since the first discovery of deep-sea hydrothermal vents along the Galápagos Rift in 1977, numerous vent sites and endemic faunal assemblages have been found…”
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Towards modelling of corrugation ridges at ice-sheet grounding lines by Hogan, Kelly A, Warburton, Katarzyna L. P, Graham, Alastair G. C, Neufeld, Jerome A, Hewitt, Duncan R, Dowdeswell, Julian A, Larter, Robert D

“…Improvements in the resolution of sea-floor mapping techniques have revealed extremely regular, sub-metre-scale ridge landforms produced by the tidal flexure…”
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Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations by Jeofry, Hafeez, Ross, Neil, Le Brocq, Anne, Graham, Alastair G.C., Li, Jilu, Gogineni, Prasad, Morlighem, Mathieu, Jordan, Thomas, Siegert, Martin J.

“…Satellite imagery reveals flowstripes on Foundation Ice Stream parallel to ice flow, and meandering features on the ice-shelf that cross-cut ice flow and are…”
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Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream by Larter, Robert D, Hogan, Kelly A, Hillenbrand, Claus-Dieter, Smith, James A, Batchelor, Christine L, Cartigny, Matthieu, Tate, Alex J, Kirkham, James D, Roseby, Zoe A, Kuhn, Gerhard, Graham, Alastair G. C, Dowdeswell, Julian A

“…Basal hydrological systems play an important role in controlling the dynamic behaviour of ice streams. Data showing their morphology and relationship to…”
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Geospatial simulations of airborne ice-penetrating radar surveying reveal elevation under-measurement bias for ice-sheet bed topography by Bartlett, Oliver T., Palmer, Steven J., Schroeder, Dustin M., MacKie, Emma J., Barrows, Timothy T., Graham, Alastair G. C.

“…Airborne radio-echo sounding (RES) surveys are widely used to measure ice-sheet bed topography. Measuring bed topography as accurately and widely as possible…”
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How dynamic are ice-stream beds? by Davies, Damon, Bingham, Robert G, King, Edward C, Smith, Andrew M, Brisbourne, Alex M, Spagnolo, Matteo, Graham, Alastair G. C, Hogg, Anna E, Vaughan, David G

“…Projections of sea-level rise contributions from West Antarctica's dynamically thinning ice streams contain high uncertainty because some of the key processes…”
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Deglaciation and future stability of the Coats Land ice margin, Antarctica by Hodgson, Dominic A, Hogan, Kelly, Smith, James M, Smith, James A, Hillenbrand, Claus-Dieter, Graham, Alastair G. C, Fretwell, Peter, Allen, Claire, Peck, Vicky, Arndt, Jan-Erik, Dorschel, Boris, Hübscher, Christian, Smith, Andrew M, Larter, Robert

“…The East Antarctic Ice Sheet discharges into the Weddell Sea via the Coats Land ice margin. We have used geophysical data to determine the changing ice-sheet…”
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New constraints on the timing of West Antarctic Ice Sheet retreat in the eastern Amundsen Sea since the Last Glacial Maximum by Smith, James A., Hillenbrand, Claus-Dieter, Kuhn, Gerhard, Klages, Johann Phillip, Graham, Alastair G.C., Larter, Robert D., Ehrmann, Werner, Moreton, Steven G., Wiers, Steffen, Frederichs, Thomas

“…Glaciers flowing into the Amundsen Sea Embayment (ASE) account for >35% of the total discharge of the West Antarctic Ice Sheet (WAIS) and have thinned and…”
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Fauna of the Kemp Caldera and its upper bathyal hydrothermal vents (South Sandwich Arc, Antarctica) by Linse, Katrin, Copley, Jonathan T, Connelly, Douglas P, Larter, Robert D, Pearce, David A, Polunin, Nick V C, Rogers, Alex D, Chen, Chong, Clarke, Andrew, Glover, Adrian G, Graham, Alastair G C, Huvenne, Veerle A I, Marsh, Leigh, Reid, William D K, Roterman, C Nicolai, Sweeting, Christopher J, Zwirglmaier, Katrin, Tyler, Paul A

“…Faunal assemblages at hydrothermal vents associated with island-arc volcanism are less well known than those at vents on mid-ocean ridges and back-arc…”
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Rapid retreat of Thwaites Glacier in the pre-satellite era by Graham, Alastair G. C., Wåhlin, Anna, Hogan, Kelly A., Nitsche, Frank O., Heywood, Karen J., Totten, Rebecca L., Smith, James A., Hillenbrand, Claus-Dieter, Simkins, Lauren M., Anderson, John B., Wellner, Julia S., Larter, Robert D.

“…Understanding the recent history of Thwaites Glacier, and the processes controlling its ongoing retreat, is key to projecting Antarctic contributions to future…”
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