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ARI: Seasonal Fluxes across Submarine Ice Sheet Margins: A Pilot Study in West Greenland

General

Project start
01.01.2012
Project end
31.12.2013
Type of project
ARMAP/NSF
Project theme
Cryosphere
Project topic
Cryosphere

Fieldwork / Study

Fieldwork country
Greenland (DK)
Fieldwork region
Greenland, Mid-West
Fieldwork location

Geolocation is 69.2166667, -51.1

Fieldwork start
17.07.2012
Fieldwork end
26.07.2012

SAR information

Fieldwork / Study

Fieldwork country
Greenland (DK)
Fieldwork region
Greenland, Mid-West
Fieldwork location

Geolocation is 68.9111111, -50.40194444

Fieldwork start
17.07.2012
Fieldwork end
26.07.2012

SAR information

Fieldwork / Study

Fieldwork country
Greenland (DK)
Fieldwork region
Greenland, Mid-West
Fieldwork location

Geolocation is 69.2166667, -51.1

Fieldwork start
22.07.2013
Fieldwork end
03.08.2013

SAR information

Fieldwork / Study

Fieldwork country
Greenland (DK)
Fieldwork region
Greenland, Mid-West
Fieldwork location

Geolocation is 68.9111111, -50.40194444

Fieldwork start
22.07.2013
Fieldwork end
03.08.2013

SAR information

Project details

09.04.2019
Science / project plan

.

Science / project summary
This is a pilot study to investigate seasonally varying discharge across submarine ice sheet margins (aka grounding lines), one of the most important but least accessible, and thus least well understood, regions of the polar ice sheets. Glacial meltwater provides a significant source of freshwater, chemicals, nutrients and sediment to the surrounding oceans, but the lack of observations at the submarine ocean-ice interface, where the bulk of this meltwater is released, have thus far precluded the ability to understand the magnitude and variability of these fluxes. Researchers have chosen an outlet glacier / fjord system in western Greenland that is relatively shallow and free of large iceberg calving activity as the study site, enabling measurements and sampling at the ice-ocean interface. Field work will occur during targeted field campaigns that represent both low melt/discharge (“winter”) conditions and peak melt/discharge (“summer”) conditions to investigate the temporal and spatial nature of these highly variable fluxes. Researchers will use passive and active water mass tracers following classical oceanographic methods, along with discrete water sampling, carried out by ice-edge and under-ice AUV surveys (leveraging work being done under a separate NSF-MRI award), to investigate the character and fate of meltwater released at the submarine ice edge.
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