C031
Recent Advances in Understanding Glacier Surges and other Flow Instabilities
Session ID#: 161004
Session Description:
The rapid acceleration of glacier motion associated with surges has long fascinated scientists and the public. Our understanding of the physical mechanisms involved is rooted in theoretical and process-based studies, concentrated in the 1970s and 1980s, that illuminated both the role of water and thermal processes. Recent years have seen a revival in the interest in surge-type glaciers, flow instabilities, and glacier hazards in general. The remote-sensing data revolution has led to more frequent and detailed observations of fast and/or unstable glacier flow, while in-situ measurements and monitoring have seen considerable advances. New ideas about surge mechanisms have also been proposed. In this session we invite contributions on all aspects of glacier surges and other flow instabilities, including remote-sensing, experimental, field-based, theoretical, and process-oriented studies.
Index Terms:
0720 Glaciers [CRYOSPHERE]
0774 Dynamics [CRYOSPHERE]
0776 Glaciology [CRYOSPHERE]
4308 Other [NATURAL HAZARDS]
Primary Convener: Martin Truffer, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States
Conveners: Gwenn E Flowers, Simon Fraser University, Department of Earth Sciences, Burnaby, BC, Canada and Coline Bouchayer, University of Oslo, Geosciences, Oslo, Norway
Combining Existing Approaches Towards a Universal Model of Glacier Surges. (Invited) (1042447)
Yoram Terleth1, Ward van Pelt2, Timothy C Bartholomaus3, Flavien Beaud1, Veijo A Pohjola2 and Rickard Pettersson2, (1)University of Idaho, Moscow, United States, (2)Uppsala University, Uppsala, Sweden, (3)University of Idaho, Moscow, ID, United States
Estimating the dominant creep mechanisms and viscous stress exponent (n) in fast-flowing glaciers (Invited) (1048828)
Meghana Ranganathan, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, United States; Georgia Institute of Technology Main Campus, School of Earth and Atmospheric Sciences, Atlanta, United States and Brent Minchew, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
Forward Modelling the Kinematic Evolution of Kilometer-Scale Fold Trains in Surge-Type Glaciers (1069886)
Gwenn E Flowers1, Erik M Young1, Hester Jiskoot2 and Dan Gibson1, (1)Simon Fraser University, Earth Sciences, Burnaby, BC, Canada, (2)University of Lethbridge, Geography and Environment, Lethbridge, AB, Canada
An Intercomparison Between the Surge Propagation of the Sít’ Kusá (Turner) and Nàłùdäy (Lowell) Glaciers Using Optical Imagery from PlanetScope Satellites (1090087)
Madeline Gendreau1, Ellyn M Enderlin2, Julia Liu2, Christine F Dow3 and Luke Copland4, (1)Boise State University, Geosciences, Boise, United States, (2)Boise State University, Department of Geosciences, Boise, ID, United States, (3)University of Waterloo, Department of Geography and Environmental Management, Waterloo, ON, Canada, (4)University of Ottawa, Department of Geography, Environment and Geomatics, Ottawa, ON, Canada
The Surge of Negribreen, Svalbard (1092283)
Helmut Mayer, Terra Mobilis, Lafayette, CO, UNITED STATES, Ute C Herzfeld, University Colorado Boulder, Geomathematics, Remote Sensing and Cryospheric Sciences Laboratory; Electrical, Computer and Energy Engineering, Boulder, United States, Thomas Trantow, University of Colorado Boulder, ECEE, Boulder, CO, United States, Matthew William Lawson, University of Colorado Boulder, Computer Science, Boulder, CO, United States, Lawrence J Hessburg IV, University of Colorado Boulder, Boulder, CO, United States and Huilin Han, University of Colorado Boulder, Geomathematics, Remote Sensing and Cryospheric Sciences Laboratory; Department of Computer Sciences, Boulder, United States
Observing the on-going destabilisation of an Arctic surge-type glacier, Kongsvegen. (1147978)
Coline Bouchayer1,2, Ugo Nanni1, Louise Steffensen Schmidt1, Pierre-Marie Lefeuvre3, John Hult1, Francois Renard2,4 and Thomas Schuler1,2, (1)University of Oslo, Geosciences, Oslo, Norway, (2)The Njord Center, Department of Geosciences and Physics, University of Oslo, Oslo, Norway, (3)Norwegian polar insitute, Tromsø, Norway, (4)University Grenoble Alpes, University Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, France
Velocity Record of the 2020-22 Muldrow Glacier Surge, Denali National Park, Alaska (1176106)
David Polashenski1, Chad Hults2, Martin Truffer3, Mark A Fahnestock3 and Emily R Fedders4, (1)University of Alaska Fairbanks, Fairbanks, AK, United States, (2)National Park Service Anchorage, Anchorage, United States, (3)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (4)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States
Evolution of driving and resistive stresses throughout the recent surge cycle of Sít’ Kusá, Lingít Aaní, from surface velocity and elevation observations (1189820)
Julia Liu1, Ellyn M Enderlin2, Timothy C Bartholomaus3, Dylan Mikesell4, Flavien Beaud5 and Yoram Terleth5, (1)Boise State University, Geosciences, Boise, ID, United States, (2)Boise State University, Department of Geosciences, Boise, ID, United States, (3)University of Idaho, Moscow, ID, United States, (4)Boise State University, Department of Geosciences, Boise, United States, (5)University of Idaho, Moscow, United States
A CENTURY OF SURGES OF THE SIT'TLEIN (MALASPINA) GLACIER, SOUTHEAST ALASKA (1190548)
Victor Devaux-Chupin1, Martin Truffer1, Mark A Fahnestock1, Douglas Brinkerhoff2 and Brandon Tober3, (1)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (2)University of Montana, Department of Computer Science, Missoula, MT, United States, (3)University of Arizona, Department of Geosciences, Tucson, AZ, United States
Continued Build-Up to a New Surge of Kongsvegen, Svalbard (1194294)
Jack Kohler1, Pierre-Marie Lefeuvre2, Christopher Nuth3 and Ceslav Czyz1, (1)Norwegian Polar Institute, Tromsø, Norway, (2)Norwegian polar insitute, Tromsø, Norway, (3)The Norwegian Defense Research Establishment, Kjeller, Norway
