Tidal Motion of west ice shelf

Here's a quick animation of an exaggerated (100x) tidal motion of West Ice Shelf, Antarctica.  Here Bedmap2 data are forced with Laurie Padman's CATS2008b tide prediction model.  You'll notice that the ice shelf does not rise and fall as a solid unit; instead, at times parts are rising while other sections are falling.  A major simplification here is that the ice shelf hinges upon a clearly-defined grounding line, and any given parcel of ice exhibits either 100% of tidal flexure, or none at all.  In reality, the grounding line is more of a broad grounding zone, where the ice may move only a small fraction of the full tidal displacement, or vertical motion may even be opposite in sign of the nearby tidal forcing.

Cross-Track Radar Uncertainty Over Thwaites Glacier

Top Figure: Cross-track glacial bed topography along a 98 km flight line over a synthetic bed modeled after highland Thwaites Glacier. Black lines indicate extents of area illuminated by radar.

Bottom Figure: Along-track bed topography. "Phantom bedrock" is seen by the radar when the nearest reflector is off-nadir in the cross-track direction. For example, at an along-track distance of 90 km (0:38 in this video), a feature ~1 km to the left of the aircraft is seen as the closest reflector. Red star indicates aircraft position.

Synthetic topography generated by John Goff at the University of Texas Institute for Geophysics.

Gravity Anomalies Over Edwards Aquifer

Gravity anomalies are linked to water storage in Edwards Aquifer, Texas.

Retrograde Motion of a Rayleigh Wave

Animation depicting elliptical retrograde motion of surface particles in a Rayleigh wave

Weeknight Fun

In my free time I enjoy riding my bike with friends. Perhaps not everyone in the world needs to own a tandem bicycle, but mathematically speaking, at least 50% of us should.