Session 3: Ice Sheets and Ice Shelves - Hydrology & Dynamics

Summary and recommendations

1. We saw lots of focus on sub-glacial hydrology, from a variety of sensors with a variety of techniques.

• Need to compare estimates from independent techniques to learn more about process and drivers

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2. Subglacial lake drainage can be a large temporally variable source of freshwater.

• Need to conduct more research into the impact of sub glacial lake drainage on freshwater budget of southern ocean, and its impact on nutrient levels

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3. Elevation change from altimetry likely has implications for ice-dynamic change.

• Need to combine these results with ice velocity change measurements from SAR to understand the processes driving ice dynamic change

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4. Grounding-line locations are an integral part of many of the studies in this session.

• Need more measurements of this parameter from any technique, and comparisons between techniques over lightly grounded regions.

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Session 3: Ice Sheets and Ice Shelves - Hydrology & Dynamics

Summary and recommendations

4. Altimetry measurements have implications for more than just ice-sheet mass balance, and more than just one mission.

• Need user-friendly products that resolve DEM changes over multiple decades / multiple mission

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5. Sonar data is only available over 3 supra-glacial lakes in Greenland

• There is a need for more lake depth measurements to validate satellite data

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6. There was huge community interest in this session, the room was packed – demonstrating strength of community.

• Please can we have more ESA-NASA joint meetings to bring these communities together???!

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