CReSIS is developing sophisticated sensors and long-duration uninhabited aerial systems (UAS) to carry them. These sensors and UAS are for collecting much needed data over areas of Greenland and Antarctic ice sheets undergoing rapid changes. These data are essential to understand the processes causing rapid changes for developing improved ice sheet models to simulate how ice sheets will respond to a warming climate and predict their contribution to sea-level rise.
There are large gaps in data, particularly in ice thickness data and subglacial conditions. Identifying gaps will allow development of relevant technologies and determine where investigations need to focus.
Inventory all major ice-sheet drainage basins: area, extent, surface and bed elevations, velocity fields, snow accumulation and melting, basal conditions, etc.
Identify drainage basins undergoing significant change
Partition these changing drainage basins into those caused by perturbations in snow accumulation/ablation and those caused by changes in ice motion
Identify data gaps
Current technologies limit data acquisition to coarse spatial resolution and new types of measurements may be needed. Identify regions where detailed surveys are needed, develop the technologies to accomplish the surveys, make the measurements or collaborate to do so. Sensor miniaturization is a major part of this work.
Time-series of accumulation rates (ice coring and airborne shallow-depth radar)
Time-series of surface elevations (airborne and satellite altimeters)
Time-series of ice velocities (in situ GPS, InSAR and satellite/airborne imagery)
Time-series of surface melt rates (weather observations, satellite infrared and microwave measurements, cores and pits, and shallow radar)
Ice thickness and internal layering (radar and seismics)
Ice basal characteristics (ice coring, seismic sounding, and radar sounding)
Many different approaches will be integrated into these models to increase models' accuracy. Model studies and discussions of results with the broader community will expose questions that further challenge our understanding. CReSIS will serve as a feedback mechanism for translating the questions into requirements for next-generation technologies.
Process studies, ranging from atmosphere and surface interactions to basal sliding
Data-assimilation modeling, including derived data products
Predictive ice-sheet models, incorporating newest data and tested using all available information on ice-sheet behavior
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National Women's History Month // 3/1/2014 - all day
CReSIS Knowledge Transfer Meeting // 3/10/2014 - 2:00pm
PolarGrid Meeting // 3/11/2014 - 9:30am
CReSIS Management Teleconference // 3/11/2014 - 1:00pm
CReSIS Support Teleconference // 3/11/2014 - 2:00pm