Some scientific instruments off the coast of Puerto Rico captured data revealing hurricane-related ocean dynamics that no scientist had ever recorded.
Underwater, NOAA uses other drones, or gliders, to profile the vast areas regularly traversed by tropical storms. These glidersin 2020. By contrast, the instruments that the team set in Puerto Rico’s waters in 2017 collected over 250 million data points, including current velocity and direction — a rare and especially valuable glimpse of hurricane-induced ocean dynamics at a single location.After the storm passed, Storlazzi was sure the hurricane had destroyed his instruments.
outside Guánica Bay, spiking PCB concentrations and threatening coral health. As of a few months after the storm, the pollution hadn’t reached the deeper reefs. Oceanographer Olivia Cheriton realized that data on ocean currents told a new story about Hurricane Maria.During the hurricane, the top 20 meters of the Caribbean Sea had consistently remained at or above 26º C, a few degrees warmer than the layers beneath. But the surface waters should have been cooled if, as expected, Maria’s winds had acted like a big spoon, mixing the warm surface with cold water stirred up from the seafloor 50 to 80 meters below.
As a result, the surface stayed warm, increasing the force of the hurricane. The cooler layers below then started to pile up vertically into distinct layers, one on top of the other, beneath the gushing waters above.
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