Researchers at the Scripps Institution of Oceanography hope to better understand how freshwater interacts with the ocean once it leaves the Los Penasquitos Lagoon.
Giddings chose Friday morning for the dye release because a high tide was receding and that helped push the lighter freshwater out of the lagoon and into the heavy saltwater.
The team wanted a day when winter waves were rolling toward shore, pushing back at the freshwater plume. “The waves can effectively trap the river plume in the surf zone, such that it spreads along the shore instead of punching offshore,” Giddings said. “And so we’re sort of trying to understand that transition between when it punches offshore and spreads off shore versus when it gets trapped in the surf zone and spreads along shore.”
The painted water quickly began mixing with the surf, and researchers tracking the dye with drones say it quickly moved south, along the coast.Back in 2015, Scripps researchers released the pink dye just off the Southern San Diego County coast and off the coast of Mexico in an effort to track how pollution moves once it hits the ocean.
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