This summer, researchers drilled far beneath the Atlantic Ocean near the northeastern coast of the United States and accessed a vast, enigmatic supply of fresh water — what they found may hold significant consequences for a planet facing ongoing challenges.an ever-worsening water crisis.
Freshwater under the Atlantic has been recognized for many years, yet it has remained largely unexamined. During the 1960s and 1970s, scientific missions and corporations exploring the ocean for resources like oil occasionally encountered fresh water.
Later, in 2019, researchers from the Woods Hole Oceanographic Institution and Columbia University made an announcementa “surprising discovery.”They used electromagnetic waves to discover a massive area of fresh water beneath the ocean, extending along the coastline from Massachusetts to New Jersey, and possibly even more.
“It seems to be the biggest of its kind ever discovered globally,” the scientists stated in astatement at the time.
It sparked significant questions: how did it arrive there? How ancient is the water? Is it being renewed? And, importantly: Could coastal aquifers such as this serve as a new source of fresh water for a world in need? The enormous reservoir near the US coast isjust one of manythought to be located beneath the Earth’s oceans.
A group of global scientists, involved in a project known asExpedition 501, chose to seek solutions — that involved drilling straight into the aquifer.
In May, they departed from Bridgeport, Connecticut, aboard a vessel fitted with a drilling platform. They remained at sea for three months, drilling between approximately 1,000 to 1,300 feet below the ocean floor at various sites to collect sediment and water samples.
They found water with a salt concentration significantly lower than that of seawater, matching the levels recommended by U.S. and global organizations for potable water. It is currently being sent to a laboratory for analysis to identify the types of microorganisms present and to assess its safety for consumption.
Another enigma to solve is the age of the water. It might be 200 years old, or it could be as ancient as 20,000 years, noted Brandon Dugan, a geophysics professor at the Colorado School of Mines and a key figure on the expedition.
The existence of younger water implies the reserve is being refilled; older water suggests it is a limited resource that isn’t being recharged. Dugan stated they should have the answers within approximately six months.
Scientists will also conduct experiments to identify the source of the water — it could have originated from a melting glacier or from precipitation.
“We believe the freshwater arrived there thousands of years ago, when the sea level was significantly lower and the continental shelf was visible above water,” said Holly Michael, a professor of Earth sciences and civil and environmental engineering at the University of Delaware, who participated in the expedition.
Understanding the source will aid in uncovering “how these systems have developed over time,” Dugan stated. Researchers can subsequently use this knowledge to examine other regions that show signs of offshore freshwater aquifers, including Indonesia, Australia, and South Africa.
It will also assist them in understanding how these underwater freshwater sources are evolving asglobal sea level rises, whether they are expanding or contracting.
“Addressing these questions is crucial for forecasting how we could utilize the water in the future,” Michael stated.
The aquifer, as verified by the expedition, is extensive, according to Eric Attias, a research assistant professor at the Jackson School of Geosciences at the University of Texas at Austin, who did not participate in the study.
It might “hold enough fresh water to provide a city as large as New York City for hundreds of years,” he said to the Muara Digital Team, and offers hope that it could “help reduce water shortages for coastal communities in the future.”
Almost half of the world’s population resides within 60 miles of a coastline, and many depend on coastal aquifers — sources that arerapidly shrinkingbecause of excessive pumping and climate change effects like increasing sea levels, which may pollute groundwater.
“In the future, coastal water resources are expected to face even greater pressure,” Michael stated, pushing communities to seek out more costly water sources, like desalination. Submarine aquifers might offer another option.
There are numerous obstacles to address first, however. Water is dense, and lifting it up and moving it to the shore could be extremely energy-consuming and costly, although Dugan proposes that wind power might offer a solution. There’s also the issue of who will oversee, purify, and cover the costs of the water, which will be drawn from federal waters before being distributed to states and then to cities.
Another technical difficulty involves preventing freshwater from becoming polluted by the saltwater that is located both above and below it. If the two systems are linked, pumping could also result in the contamination of inland aquifers, according to Attias.
Extracting groundwater from offshore areas will be costly, and it isn’t limitless,” Michael stated. “Preserving the freshwater we have on land remains our best approach. … Naturally, this doesn’t imply we shouldn’t explore other alternatives, which is why we are conducting this research.
Dugan is hopeful regarding the possibilities. “All the necessary elements are present,” he mentioned, adding that it’s simply a matter of time. He believes it may take approximately 10 years before offshore aquifers can be effectively utilized.
What the researchers discover over the coming months may hold worldwide significance. According to Dugan, evidence indicates there are offshore freshwater sources on every continent. “We can apply what we’ve learned in this small area of New England and begin considering how it applies to other regions.”
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