Multibeam sonar used to derive high resolution 3D visualization of a marine megaplume.

First detailed 3D image of marine megaplume downwelling and intrusion layer formation.

Evidence supportive that currents help stabilize plumes against massive detrainment.

Multibeam sonar has applications including better modeling seep methane fate.

Intrusion layer forms above thermocline, elevated around the plume by upwelling flow.