C009
Archives and Observations From Sub-Ice Environments
Session ID#: 159141
Session Description:
Interconnected physical and geobiological systems in the subglacial environment modulate modern ice-sheet processes. Floating ice shelves restrain the flow of continental ice and, thus, changes within them can lead to acceleration of ice with direct impacts on the subglacial environment and global sea level. A holistic view of the extent, magnitude, and timescale of glaciological, geochemical, geomorphic, hydrological, and geobiological processes in sub-ice-sheet and sub-ice-shelf environments can help refine our quantification of past, present, and future ice-sheet states and related ice-sheet influence on connected systems. This session aims to bring together studies from a variety of fields to explore how modern observations and models of sub-ice systems can improve our interpretation of paleoclimate records and how inferences from paleoclimate records can help contextualize the relevance and magnitude of modern ice sheet processes. We encourage contributions that cover a wide-range of methods to improve our collective process-to-paleo perspective.
Index Terms:
0720 Glaciers [CRYOSPHERE]
0726 Ice sheets [CRYOSPHERE]
0728 Ice shelves [CRYOSPHERE]
0730 Ice streams [CRYOSPHERE]
Primary Convener: Matthew Siegfried, Colorado School of Mines, Department of Geophysics, Hydrologic Science & Engineering Program, Golden, CO, United States
Conveners: Ryan Venturelli, Colorado School of Mines, Department of Geology and Geological Engineering, Geochemistry Program, Golden, CO, United States and Jon Hawkings, Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States
Student/Early Career Convener: Ryan Venturelli, Colorado School of Mines, Department of Geology and Geological Engineering, Geochemistry Program, Golden, CO, United States
Downstream impacts of sub-ice processes on coastal ocean nutrient supply (Invited) (1047760)
Amber Luella Annett1, Rhiannon Jones2, Pinghe Cai3, Malcolm Woodward4, James Williams5, Oliver Flanagan2, Mehul Vora6, Alejandro Roman Gonzalez7,8, Maeve C Lohan9, Michael Paul Meredith10, James Scourse11 and Chester Sands10, (1)University of Southampton, Southampton, SO14, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)Xiamen University, State Key Laboratory of Marine Environmental Science, Xiamen, China, (4)Plymouth Marine Laboratory, Plymouth, United Kingdom, (5)Cardiff University, Cardiff, United Kingdom, (6)ModOmics Ltd., Southampton, United Kingdom, (7)University of Exeter, Exeter, United Kingdom, (8)University of Portsmouth, Portsmouth, United Kingdom, (9)University of Southampton, Ocean and Earth Sciences, National Oceanography Centre, Southampton, United Kingdom, (10)NERC British Antarctic Survey, Cambridge, United Kingdom, (11)University of Exeter, College of Life and Environmental Sciences, Penryn, United Kingdom
Modeling sediment entrainment at the ice-bed interface (1082517)
Ethan Pierce, University of Colorado Boulder, Institute of Arctic and Alpine Research, Boulder, CO, United States, Irina Overeem, University of Colorado, Institute of Arctic and Alpine Research and Department of Geological Sciences, Boulder, CO, United States and Brandee Carlson, University of Houston, Earth and Atmospheric Sciences, Houston, United States
Reorganization of subglacial drainage processes during rapid melting of former ice sheets (1090189)
Adam Hepburn1, Christine F Dow2, Antti Ojala3, Elina Ahokangas3, Joni Kalevi Mäkinen3, Jukka-Pekka Palmu4 and Kari Kajuutti3, (1)University of Waterloo, Waterloo, ON, Canada, (2)University of Waterloo, Department of Geography and Environmental Management, Waterloo, ON, Canada, (3)University of Turku, Turku, Finland, (4)Geological Survey of Finland, Espoo, Finland
Subglacial Processes Inferred from Grain-shape Alteration of Till and Meltwater Plume Deposits from Antarctica and Greenland (1133102)
Allison Lepp, University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States, Lauren Miller Simkins, University of Virginia, Department of Environmental Sciences, Charlottesville, United States, John B Anderson, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States and Matt O'Regan, Stockholm University, Department of Geological Sciences, Stockholm, Sweden
Characterizing Bed Roughness on a Deglaciated Continental Margin and its Impact on Past Streaming Ice Flow (1150909)
Santiago Munevar Garcia1, Lauren Miller Simkins1, Francesca A.M. Falcini2 and Leigh A Stearns3, (1)University of Virginia, Department of Environmental Sciences, Charlottesville, United States, (2)University of York, Department of Environment and Geography, York, United Kingdom, (3)University of Kansas, Department of Geology, Lawrence, KS, United States
Geographical Repositioning Efforts and Vertical Calibration of Z-scopes from SPRI-NSF-TUD surveys at Ross Ice Shelf, Antarctica (1160430)
Angelo Tarzona1, Winnie Chu2, Hannah Verboncoeur3, Matthew Siegfried4, Dustin M Schroeder5, Laila Combs6, Aadhav Prabu7, Abdullah Altaweel1 and Kiera Tran8, (1)Georgia Institute of Technology Main Campus, Atlanta, United States, (2)Georgia Institute of Technology Main Campus, School of Earth and Atmospheric Science, Atlanta, United States, (3)Colorado School of Mines, Golden, CO, United States, (4)Colorado School of Mines, Department of Geophysics, Hydrologic Science & Engineering Program, Golden, CO, United States, (5)Stanford University, Department of Geophysics, Stanford, CA, United States, (6)Houston Community College, Houston, United States, (7)Stanford University, Stanford, United States, (8)Georgia Institute of Technology, Dunwoody, GA, United States
Combined Geophysical Techniques Constrain the Devon Ice Cap, Canadian High Arctic, Subglacial Environment (1173142)
Siobhan Killingbeck, University of Alberta, Edmonton, AB, Canada, Tim Hill, Simon Fraser University, Burnaby, BC, Canada, James Killingbeck, University of Alberta, Edmonton, Canada, Brittany Main, University of Ottawa, Ottawa, ON, Canada, Martyn Jonathan Unsworth, University of Alberta, Department of Physics, Edmonton, AB, Canada, Eric Brossier, Independent, NA, France, Christine F Dow, University of Waterloo, Department of Geography and Environmental Management, Waterloo, ON, Canada, Ashley Dubnick, Montana State University, Earth Sciences, Bozeman, MT, United States, Alison S Criscitiello, University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB, Canada and Anja Rutishauser, Geological Survey of Denmark and Greenland, København K, Denmark
Ice-bed interactions and recent retreat at Thwaites Glacier (1188327)
Britney Schmidt1, Peter Washam2, James A Smith3, Peter E D Davis4, Keith W Nicholls5, Kiya L Riverman6, Justin Lawrence7, David Holland8, Andrew David Mullen9, Matthew Ryan Meister9 and ITGC Melt team, (1)Cornell University, Astronomy and Earth and Atmospheric Sciences, Ithaca, NY, United States, (2)Cornell University, Ithaca, United States, (3)NERC British Antarctic Survey, Cambridge, United Kingdom, (4)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (5)British Antarctic Survey, Cambridge, United Kingdom, (6)University of Oregon, Eugene, United States, (7)Honeybee Robotics, Altadena, United States, (8)New York University, Courant Institute of Mathematical Sciences, New York, NY, United States, (9)Cornell University, School of Earth and Atmospheric Sciences, Ithaca, United States
Using englacial layer slopes to identify basal processes. (1199946)
Georgia Carroll, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Erin C Pettit, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, Kiya L Riverman, University of Portland, Portland, United States and Nicholas Holschuh, Amherst College, Geology, Amherst, MA, United States
