Relevance of field observations as boundary conditions for understanding ice-sheet-ocean interactions
ORCID: https://orcid.org/0000-0002-6380-962X, Smith, Emma C.
ORCID: https://orcid.org/0000-0002-8672-8259, Schannwell, Clemens, Eisermann, Hannes, Hattermann+, Tore, Zeising, Ole
ORCID: https://orcid.org/0000-0002-1284-8098, Ötting, Astrid, Berger, Sophie
ORCID: https://orcid.org/0000-0003-4095-9323, Hofstede, Coen
ORCID: https://orcid.org/0000-0002-6015-6918, Drews, Reinhard, Ehlers, Todd, Mayer, Christoph, Lambrecht, Astrid, Gromig, Raphael, Kuhn, Gerhard
ORCID: https://orcid.org/0000-0001-6069-7485, Tiedemann, Ralf
ORCID: https://orcid.org/0000-0001-7211-8049, Wilhelms, Frank
ORCID: https://orcid.org/0000-0001-7688-3135, Läufer, Andreas, Franke, Dieter, Gaedicke, Christoph and Pattyn, Frank
;
The direct contact of warm ocean water with the front and base of ice shelves is the main driver for accelerated mass loss of the Antarctic ice sheet. We present a compilation of observations from various projects and methodological approaches applied over the last decade along the Dronning Maud Land coast and highlight their importance for understanding the ice-ocean interactions. With a focus on the Ekström ice shelf, these include spatially continuous seismic observations in combination with airborne gravity inversion to yield sub-shelf bathymetry and geomorphological evidence of past ice-flow activity; ice-dynamic numerical modelling to investigate the role of seafloor/subglacial substrate characteristics to enhance or reduce ice-sheet extent and advance/retreat rates; sub-shelf CTD measurements to determine ocean properties driving basal melting; satellitebased remote sensing to determine ice-shelf height changes and spatially-distributed basal melting; and point measurements of basal melt with surface-based phase-sensitive radar to determine ocean-driven melt and validate remote-sensing products. As the Dronning Maud Land coast plays a critical role in preconditioning the water mass of the coastal current before it enters the Filcher ice-shelf cavity, we argue that a coordinated inter- and transdisciplinary observational network is required to facilitate monitoring a potential ice-sheet mass loss in this part of Antarctica.
ORCID: https://orcid.org/0000-0002-6380-962X, Smith, Emma C.
ORCID: https://orcid.org/0000-0002-8672-8259, Schannwell, Clemens, Eisermann, Hannes, Hattermann+, Tore, Zeising, Ole
ORCID: https://orcid.org/0000-0002-1284-8098, Ötting, Astrid, Berger, Sophie
ORCID: https://orcid.org/0000-0003-4095-9323, Hofstede, Coen
ORCID: https://orcid.org/0000-0002-6015-6918, Drews, Reinhard, Ehlers, Todd, Mayer, Christoph, Lambrecht, Astrid, Gromig, Raphael, Kuhn, Gerhard
ORCID: https://orcid.org/0000-0001-6069-7485, Tiedemann, Ralf
ORCID: https://orcid.org/0000-0001-7211-8049, Wilhelms, Frank
ORCID: https://orcid.org/0000-0001-7688-3135, Läufer, Andreas, Franke, Dieter, Gaedicke, Christoph and Pattyn, Frank
;
AWI Organizations > Geosciences > Glaciology
AWI Organizations > Geosciences > Marine Geology and Paleontology
AWI Organizations > Climate Sciences > Physical Oceanography of the Polar Seas
AWI Organizations > Geosciences > Junior Research Group: LIMPICS
Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 3: Lessons from the Past > WP 3.2: Tectonic, Climate and Biosphere Development from Greenhouse to Icehouse
Helmholtz Research Programs > PACES II (2014-2020) > TOPIC 1: Changes and regional feedbacks in Arctic and Antarctic > WP 1.2: Ice sheet dynamics and mass balance
