Hurricanes Transported Deep-Sea Carbonate Since 1978
Long-term monitoring revealed how storm-generated currents inject shallow-water sediments into the deep ocean.
Updated on Oct. 1, 2026 in Environmental
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Data from the Oceanic Flux Program spanning 1978 to the present confirmed that hurricanes actively transport shallow-water sediment, including phosphorus and carbonate minerals, to depths of 10,500 feet. Researchers identified these storm events as a previously underestimated mechanism for shifting minerals into deep-sea environments.
Why it matters
This transport process influences ocean chemistry, as carbonate minerals dissolve in cold, deep water to help neutralize carbon dioxide and mitigate acidification. Understanding this sediment conveyor is critical for predicting how the deep ocean will respond as Atlantic storms intensify.
Sediment traps at 10,500 feet captured carbonate-rich sand following Hurricane Fabian in 2003 and Hurricane Igor in 2010. These deposits originated from the Bermuda Pedestal, where hurricane-driven near-inertial waves—oscillatory currents triggered by wind stress—propagate downward to mobilize seafloor materials.
The players
Oceanic Flux Program
A long-standing research initiative funded by the National Science Foundation that operates deep-ocean observatories.
National Science Foundation
The U.S. government agency that supports fundamental research and education in all non-medical fields of science and engineering.
The details
Hurricanes generate near-inertial waves—cyclical currents that rotate at a frequency near the Earth's rotation—which travel downward and strike the slope of the Bermuda Pedestal, an extinct volcano. This impact mobilizes shallow-water sediment and plumes containing clay, phosphorus, and lead, which then descend into the deep ocean. Once these carbonate minerals reach depths of 7,900 feet or more, they begin to dissolve in the colder, more acidic deep-sea environment, thereby affecting local alkalinity.
Timeline
1978: The Oceanic Flux Program began collecting deep-ocean particle records.
1990s: Leaded gasoline was burned on Bermuda, leaving chemical signatures in sediment.
2003: Hurricane Fabian struck, resulting in sediment deposition at 10,500 feet.
2010: Hurricane Igor struck, depositing additional material in deep-sea traps.
Every six months: The team recovers the mooring and particles in a day-long operation.
The Tech Race
This finding extends the longitudinal record established by the Oceanic Flux Program to quantify how extreme weather alters the abyssal plain. It bridges the gap between atmospheric storm modeling and deep-sea geochemistry to define the modern sediment conveyor.
The findings help scientists improve climate models by accounting for how coastal reefs and storm activity interact with global ocean chemistry. These insights provide better accuracy for researchers tracking how carbon absorption changes in response to intensifying Atlantic storm seasons.
The takeaway
Hurricanes serve as significant, yet often overlooked, pumps that deliver shallow-water materials into the deep ocean. Future research will likely focus on quantifying the specific volume of carbon neutralisation enabled by these episodic storm events.
Further reading
Explore more long-term research on the Environmental impact of shifting climate patterns.
Source note: This article includes information reported by Earth.
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