September 24, 2021 — As part of the Biden administration’s commitment to tackling climate change, it wants to develop 30,000 megawatts of offshore wind power by 2030 — enough to light up 10 million homes. Only two small wind farms now exist in the United States: the five-turbine farm off the coast of Block Island, Rhode Island, operated by a unit of the Danish energy company Orsted, and a small pilot project in Virginia operated by Dominion Energy. The Bureau of Ocean Energy Management, or BOEM, has already awarded 17 lease areas between Massachusetts and North Carolina, and this year it added another eight between Long Island and Cape May.

New Jersey was awarded the largest leasing area yet: Hundreds of turbines will rise more than 80 stories tall, like a forest of steel bolstered by a bed of rocks on the seabed and stretching over hundreds of thousands of acres 10 to 15 miles from shore.

[Tom] Dameron says clammers will compete for a smaller patch of ocean.

“It’s going to lead to localized overfishing,” he says, “which will lead to the boats targeting smaller and smaller clams, which has the potential to lead to the collapse of this fishery in Atlantic City.”

Researchers, funded by a mix of grants from the fishing industry, the New Jersey Board of Public Utilities, the Department of Energy, and the wind industry, are racing to figure out what this massive industrialization — which includes 1.7 million acres of lease area along the East Coast and more than 1,500 structures in the seabed — will mean for fisheries, marine mammals, and ecosystems.

“From my perspective as a fishery scientist, that’s a lot of ocean and a lot of fisheries and a lot of marine habitat that is on the table,” says shellfish ecologist Daphne Monroe, who works at Rutgers Haskin Shellfish Research Lab. “So it’s a lot to think about.”

Monroe recently had to shift her focus to the impact of wind. Her computer modelling shows fishermen like Dameron and [Charlie] Quintana are right to be fearful.

Another fear is what could happen to a unique feature of New Jersey’s coastal fishery — the “cold pool.” Though surface waters warm each summer, lower parts of the mid-Atlantic ocean don’t mix very much with the warmer surface waters unless there’s a strong storm like a hurricane. So that deeper, colder water acts as a refrigerator for species like clams and scallops, along with bottom fish like summer flounder, or fluke.

In fact, the same ecosystem that makes fishing along the Jersey coast so lucrative, its flat sandy bottom, makes it ideal to construct a wind farm. But it’s unclear whether the wind turbines will affect that mix of ocean temperatures for better or for worse. Or whether they will shift migration patterns.

Travis Miles, a meteorologist and physical oceanographer at Rutgers University, says that in the summertime, the mid-Atlantic ocean is one of the most highly stratified and stable water columns. Warm on top, cold on the bottom, with very little mixing. He says that we can learn some things from the large wind farms that have been built in the North Sea, but that it’s a very different ecosystem.

“Europe has very strong tidal currents,” he says. “Tides happen every day, twice or more, and those strong currents can cause mixing, the faster the water goes past a structure the more mixing. The mid-Atlantic has very weak tides, what usually causes mixing are very strong storms, cyclones, or nor’easters.”

The Science Center for Marine Fisheries funded Miles to do research on both the impact of the North Sea wind farms and local impacts. He recently published his results in a peer-reviewed journal, Marine Technology Journal.

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