From Terror Symbol to Scientific Helper: Shark Back Sensors Aid Hurricane Prediction

Sharks, long depicted as symbols of terror in popular culture, are now being enlisted as scientific allies in the fight against hurricanes. Researchers are testing the feasibility of using these marine predators as mobile, near-real-time ocean data collectors.

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We are most concerned about the heat content of the ocean's surface mixed layer. This layer of the water column directly influences hurricane intensity: the warmer the mixed layer, the stronger the hurricane, because that's where the heat energy is stored that fuels the hurricane.

A team from the University of Delaware is equipping sharks with "CTD tags" that measure ocean conductivity, temperature, and depth. As sharks swim and dive, these sensors gather crucial data that can be fed into ocean, weather, and climate models. This approach leverages the sharks' extensive range and abundance, offering a novel way to gather information in areas where traditional observation methods are scarce.

Aaron Carlisle, lead researcher at the University of Delaware's School of Marine Science and Policy, explained that while animal-borne sensors are not new, sharks present unique advantages. Unlike protected marine mammals, sharks are more accessible for research. The tags are attached to the dorsal fin, allowing data transmission to satellites whenever the shark surfaces.

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The tagging process itself is as tight as a pit stop in a car race, usually not exceeding five minutes.

"We are most concerned about the heat content of the ocean's surface mixed layer," Carlisle stated. He elaborated that the temperature of this layer directly influences hurricane intensity, as warmer waters provide more energy for storms. The tagging process is quick, lasting no more than five minutes, and uses materials designed to corrode and detach over time, minimizing harm to the sharks.

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Sharks in this type of research offer a new opportunity because they are numerous, widely distributed, and more accessible than many protected marine mammals.

If successful, this project could significantly enhance hurricane intensity forecasts, particularly for coastal communities along the U.S. East Coast. Caroline Wiernicki, a doctoral student involved in the research, compared the sharks' role to diligent office workers, collecting and submitting data on schedule. This initiative promises more reliable information for communities preparing for increasingly powerful storms.

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The data collected by sharks is expected to improve hurricane intensity forecasting capabilities, especially as hurricanes approach the U.S. East Coast.