C51E:
Advances in Understanding Processes at the Beds of Glaciers and Ice Sheets Posters


Submit an Abstract to this Session


Session ID#: 51125

Session Description:
The dynamic behavior of land-based and marine-terminating glaciers depends on processes at the ice-bed interface that are difficult to observe directly. However, these processes are crucial for understanding ice movement and the development of landscapes under past and future climates.

This session includes contributions that focus on glaciological, geomorphic, geochemical, and geobiological phenomena at glacier beds. Processes of interest include ice and bed deformation, basal slip, subglacial hydrology, subglacial erosion and sediment transport, development of subglacial landforms and stratigraphy, and microbial alteration of the basal environment, among others. We invite a range of approaches that address the spatiotemporal scales of these processes, including field and geophysical observations, laboratory experiments, sedimentological and morphometric studies, and modeling efforts.
Primary Convener:  Lucas Zoet, University of Wisconsin Madison, Department of Geoscience, Madison, United States
Conveners:  Winnie Chu, Stanford University, Department of Geophysics, Stanford, CA, United States, Knut A Christianson, University of Washington, Earth and Space Sciences, Seattle, United States and Neal R Iverson, Iowa State University, Geological and Atmospheric Sciences, Ames, IA, United States
Primary Liaison:  Lucas Zoet, University of Wisconsin Madison, Department of Geoscience, Madison, United States
Chairs:  Lucas Zoet, University of Wisconsin, Madison, Department of Geoscience, Madison, United States and Neal R Iverson, Iowa State univ, Ames, IA, United States
OSPA Liaison:  Winnie Chu, Georgia Institute of Technology Main Campus, Atlanta, United States
Index Terms:

0720 Glaciers [CRYOSPHERE]
0726 Ice sheets [CRYOSPHERE]
0774 Dynamics [CRYOSPHERE]
0776 Glaciology [CRYOSPHERE]

Abstracts Submitted to this Session:

A new model for Antarctic subglacial lakes (412953)
Emma Mackie1, Celine Scheidt2, Jef Caers3 and Dustin M Schroeder1, (1)Stanford University, Department of Geophysics, Stanford, United States, (2)Stanford University, Department of Energy Resources Engineering, Stanford, CA, United States, (3)Stanford University, Earth and Planetary Sciences, Stanford, United States
Modelling the Filling and Draining of Connected Glacial Lakes (421981)
Aaron Grey Stubblefield, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, Timothy T Creyts, Columbia University-LDEO, Palisades, NY, United States, Marc W Spiegelman, Columbia University, Earth and Environmental Science/Applied Physics & Applied Math, New York, United States and Jonathan Kingslake, Lamont-Doherty Earth Observatory, Palisades, NY, United States
New insights from an airborne geophysical survey over the hypersaline subglacial lakes beneath Devon Ice Cap, Canadian Arctic (465144)
Anja Rutishauser1, Donald D Blankenship1, Lucas Beem2, Jamin Stevens Greenbaum1, Duncan A Young1, Cyril Grima2 and Alison S Criscitiello3, (1)University of Texas, Institute for Geophysics, Austin, United States, (2)University of Texas, Institute for Geophysics, Austin, TX, United States, (3)University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB, Canada
Subglacial meltwater export from the Greenland Ice Sheet observed during winter (422629)
Lincoln H H Pitcher, University of California Los Angeles, Los Angeles, United States, Laurence C Smith, Brown University, Institute at Brown for Environment and Society (IBES); Department of Earth, Environmental, and Planetary Sciences (DEEPS), Providence, RI, United States, Colin J Gleason, University of Massachusetts Amherst, Civil & Environmental Engineering, Amherst, MA, United States, Clément Miège, University of Utah, Salt Lake City, United States; Rutgers University New Brunswick, New Brunswick, United States, Birgit Hagedorn, University of Alaska Anchorage, Anchorage, AK, United States, Johnny Ryan, University of Oregon, Eugene, United States, Dirk van As, Geological Survey of Denmark and Greenland, København K, Denmark and Richard R Forster, University of Utah, School of Environment, Society, and Sustainability, Salt Lake City, UT, United States
Bed roughness as a control on the drainage of subglacial water (457826)
Timothy T Creyts, Columbia University-LDEO, Palisades, NY, United States, Winnie Chu, Stanford University, Department of Geophysics, Stanford, CA, United States, Cyril Grima, University of Texas, Institute for Geophysics, Austin, TX, United States and Dustin M Schroeder, Stanford University, Department of Geophysics, Stanford, United States
Characterizing the onset of fast flow at Institute Ice Stream, West Antarctica (428245)
Marnie Bryant1,2, Elisa Mantelli3, Jenny Suckale4, Davide Castelletti5, Martin J Siegert6 and Dustin M Schroeder5, (1)Stanford University, Stanford, United States, (2)University of California Santa Cruz, Santa Cruz, United States, (3)Stanford University, Stanford, CA, United States, (4)Stanford University, Department of Civil and Environmental Engineering, Stanford, CA, United States, (5)Stanford University, Department of Geophysics, Stanford, United States, (6)Imperial College London, London, United Kingdom
On the verge of a surge; Kongsvegen, northwestern Svalbard. (453882)
Jack Kohler1, Doug Benn2, Chris Borstad3, Samuel Huckerby Doyle4, Svein-Erik Hamran5, Bryn P Hubbard4, Adrian J Luckman6, Brittany Main7, Alexandra Messerli1, Katie E Miles4, Mats Jørgen Øyan5, Christopher Nuth8 and Philip R Porter9, (1)Norwegian Polar Institute, Tromsø, Norway, (2)UNIS, Longyearbyen, Norway, (3)University Centre in Svalbard, Longyearbyen, Norway, (4)Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, United Kingdom, (5)University of Oslo, Oslo, Norway, (6)Swansea University, Glaciology Group, Swansea, United Kingdom, (7)University of Ottawa, Ottawa, ON, Canada, (8)University of Oslo, Department of Geosciences, Oslo, Norway, (9)University of Hertfordshire, Hatfield, United Kingdom
Subglacial Channelization Through Till Deformation and Failure at the Shear Margin (449969)
Indraneel Kasmalkar1, Anders Damsgaard2, Liran Goren3, Jenny Suckale4 and Alejandro Cabrales-Vargas4, (1)Nanyang Technological University, Singapore, United States, (2)Stanford University, Department of Geophysics, Stanford, CA, United States, (3)Ben Gurion University of the Negev, Department of Earth and Environmental Sciences, Beer-Sheva, Israel, (4)Stanford Earth Sciences, Stanford, CA, United States
Basal Signatures of Subglacial Impact Structures (449963)
Mark A Fahnestock1, Joseph A MacGregor2, Kurt Henrik Kjaer3, Nicolaj Krog K Larsen4, Tobias Binder5, Anders Anker Bjørk6, Olaf Eisen7, Veit Helm8, Kristian K Kjeldsen3, Horst Machguth9, Prof. Mathieu Morlighem10, John Drysdale Paden11 and Michael Studinger2, (1)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States, (2)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (3)Natural History Museum, Copenhagen, Denmark, (4)University of Aarhus, Aarhus, Denmark, (5)Alfred Wegener Inst, Bremenhaven, Germany, (6)University of Copenhagen, Department of Geosciences and Natural Resource Management, Copenhagen, Denmark, (7)University of Bremen, Department of Geosciences, Bremen, Germany, (8)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany, (9)University of Fribourg, Fribourg, Switzerland, (10)Dartmouth College, Department of Earth Sciences, Hanover, NH, United States, (11)Center for Remote Sensing of Ice Sheets, Lawrence, KS, United States
Sensitivity of the Northeast Greenland Ice Stream to uncertainties in geothermal heat flux (347917)
Silje Smith-Johnsen, University of Bergen, Bjerknes Centre for Climate Research, Bergen, Norway, Nicole Jeanne Schlegel, NOAA Geophysical Fluid Dynamics Laboratory, Princeton, United States, Basile de Fleurian, University of Bergen, Bjerknes Center for Climate Research, Bergen, Norway and Prof. Kerim Hestnes Nisancioglu, Ph.d. , University of Bergen and the Bjerknes Centre for Climate Research, Bergen, Norway
Spectral Characteristics of the Castleguard Glacier Forefield, Alberta, CA (356570)
Jacob Woodard, University of Wisconsin-Madison, Geoscience, Madison, WI, United States, Lucas Zoet, University of Wisconsin Madison, Department of Geoscience, Madison, United States and Neal R Iverson, Iowa State univ, Ames, IA, United States
Experimental Constraints on Subglacial Abrasion (356766)
Dougal Hansen, Washington University, Department of Earth, Environmental, and Planetary Sciences, St. Louis, United States and Lucas Zoet, University of Wisconsin-Madison, Department of Geoscience, Madison, United States
Continuous Simulations over the Last 34 Million Years with a Coupled Antarctic Ice Sheet and Sediment Model (350144)
David Pollard, Pennsylvania State University Main Campus, University Park, PA, United States and Rob DeConto, University of Massachusetts Amherst, Department of Earth, Geographic and Climate Sciences, Amherst, MA, United States
BedMachine Antarctica v1: a new subglacial bed topography and ocean bathymetry dataset of Antarctica combining mass conservation, gravity inversion and streamline diffusion (412117)
Prof. Mathieu Morlighem1, Eric J Rignot2, Tobias Binder3, Donald D Blankenship4, Reinhard Drews5, Graeme Eagles6, Olaf Eisen7, Peter Fretwell8, Veit Helm9, Coen M Hofstede10, Angelika Humbert11, Wilfried Jokat12, Nanna B. Karlsson13, Won Sang Lee14, Romain Millan1, Jeremie Mouginot2, John Drysdale Paden15, Sebastian Harry Reid Rosier16, Antonia Stefanie Ruppel17, Helene L Seroussi18, Emma Clare Smith8, Daniel Steinhage9 and Duncan A Young19, (1)University of California Irvine, Irvine, CA, United States, (2)University of California Irvine, Department of Earth System Science, Irvine, CA, United States, (3)Alfred Wegener Inst, Bremenhaven, Germany, (4)University of Texas, Institute for Geophysics, Austin, United States, (5)University of Bremen, Bremen, Germany, (6)Royal Holloway Univ. London, Bremerhaven, Germany, (7)AWI Bremerhaven, Bremerhaven, Germany, (8)NERC British Antarctic Survey, Cambridge, United Kingdom, (9)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany, (10)Alfred Wegener Institute, Helmholtz-Center for Polar and Marine Research (AWI), Division of Geosciences, Bremerhaven, Germany, (11)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Glaciology Section, Bremerhaven, Germany, (12)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (13)University of Copenhagen, Copenhagen, Denmark, (14)Korea Polar Research Institute, Division of Glacier and Earth Sciences, Incheon, South Korea, (15)Center for Remote Sensing of Ice Sheets (CReSIS), University of Kansas, Lawrence, United States, (16)NERC British Antarctic Survey, Cambridge, CB3, United Kingdom, (17)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (18)Dartmouth College, Thayer School of Engineering, Hanover, NH, United States, (19)Institute for Geophysics, Austin, TX, United States
The challenge of spatio-temporal variability of processes across Antarctic ice-bed-ocean interfaces: past evolution of Antarctic sensitivity to climatic conditions (357121)
Florence Colleoni1, Laura De Santis2, Christine S Siddoway3, Andrea Bergamasco4, Nicholas R Golledge5, Gerrit Lohmann6, Sandra Passchier7, Martin J Siegert8, Enea Montoli9, Elisabetta Olivo1, Christopher C Sorlien10, Philip J Bart11, Edward Gasson12, Chiara Sauli13, Nigel Wardell2 and Stefano Prato14, (1)National Institute of Oceanography and Applied Geophysics OGS, Trieste, Italy, (2)National Institute of Oceanography and Applied Geophysics OGS, Geophysics, Trieste, Italy, (3)Colorado College, Geology, Colorado Springs, CO, United States, (4)CNR-ISMAR Inst. of Marine Sciences, Bologna, Italy, (5)Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand, (6)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany, (7)Montclair State--EES, Montclair, NJ, United States, (8)Imperial College London, London, United Kingdom, (9)Euro Mediterranean Centre on Climate Change, Bologna, Italy, (10)Earth Research Institute, Santa Barbara, CA, United States, (11)Department of Geology and Geophysics, Louisiana State University, Baton Rouge, United States, (12)University of Exeter, Department of Earth and Environmental Sciences, Penryn, United Kingdom, (13)Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS, Trieste, Italy, (14)A.P.E Research srl, Trieste, Italy
Tectonic and Climate Influences on Spatial and Temporal Variations of Subglacial Erosion; Bering Glacier, Alaska (433824)
Michelle L Penkrot1, John M. Jaeger1, Ellen A Cowan2, Maureen H Walczak3, Alan C Mix3 and Leah LeVay4, (1)University of Florida, Gainesville, FL, United States, (2)Appalachian State University, Boone, NC, United States, (3)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (4)Texas A&M University, International Ocean Discovery Program, College Station, TX, United States
ESTABLISHING THE LAST GLACIAL MAXIMUM-TO-MODERN SPATIAL PATTERNS OF GLACIAL EROSION IN THE BERING-BAGLEY GLACIAL SYSTEM, GULF OF ALASKA, FROM IODP EXPEDITION 341 SITE U1421 (423227)
Krista McGillivray1, John M. Jaeger1, Ellen A Cowan2 and Sarah Zellers3, (1)University of Florida, Gainesville, FL, United States, (2)Appalachian State University, Boone, NC, United States, (3)University of Central Missouri, Physical Sciences, Warrensburg, MO, United States
Improving the Understanding of Subglacial Weathering Using Variations in Silicon Isotope Composition. (362315)
Jade Hatton, Charles University, Department of Ecology, Prague, Czech Republic, Katharine R Hendry, University of Bristol, School of Earth Sciences, Bristol, United Kingdom, Jon Hawkings, University of Bristol, Bristol, BS8, United Kingdom and Jemma Wadham, University of Bristol, Bristol Glaciology Centre, Bristol, United Kingdom
Holocene Antarctic subglacial weathering and ice-sheet history reconstructed using the authigenic 10Be/9Be ratios of sediments from lake Maruwan Oike, Antarctica (365888)
Adam David Sproson, Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, Yusuke Yokoyama, The University of Tokyo, Atmosphere and Ocean Research Institute (AORI), Kashiwa, Japan, Yoshinori Takano, JAMSTEC, Yokosuka, Japan and Yosuke Miyairi, AORI, The University of Tokyo, Kashiwa-Shi, Chiba, Japan

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