09/09/2026
🌊 It's no secret that our coastlines are constantly evolving. Powerful storms can reshape coastal cliffs in a matter of days. Beaches shapeshift as a result of wave impact, tide changes and wind activity. And cliffs retreat over time. To understand these changes, you first need to know exactly what the coastline looked like before the next big event.
That's where the Scripps Oceanography Air-Sea Interaction Laboratory comes in with its MASS instrument, which includes a topographic LiDAR alongside visible, hyperspectral, and infrared imagery.
The team is set to conduct its seventh statewide survey of California's coastline using MASS to create a high-resolution baseline for tracking both seasonal and longer-term coastal changes, as funded by the State of California.
✈️ So, how does the survey work? Researchers and engineers take to the skies to operate MASS from a small plane during low tides. The LiDAR uses laser pulses that are emitted from a small airplane to map the elevation of the coastline in remarkable detail. When the data is combined with the collected imagery, it can create a telling 3D point cloud visualization. The surveys capture everything from gradual, centimeter-scale cliff retreat to individual collapses that can move meters of earth.
The goal? To build a record of coastal change that helps scientists understand how California's coastline responds to storms and other events, to improve models of future change, and to provide data that informs coastal planning and infrastructure decisions. The Air-Sea Lab works closely with labs across Scripps, including the Coastal Processes Group, to provide a holistic view of the state's changing coastlines.
Nick Statom, an associate development engineer with the Air-Sea Interaction Lab, also brings a handheld camera on board to document the changes in photos while operating the instruments.
“We can mobilize quickly with the MASS to basically create a snapshot before and after a particular set of storms,” says Statom. “When paired with photos of familiar landmarks along our coastline, it can help raise awareness of the changes that are taking place.”
By turning those snapshots into a long-term record, researchers can better understand where California's coast is changing most and help communities prepare for what comes next. The team is looking ahead to the end of this month, when the next survey is set to take flight. 🌎
Learn more about the survey: https://airsea.ucsd.edu/fieldwork/coast/