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Illustrated map showing coastal ocean current around Massachusetts.

Illustrated map showing coastal ocean current around Massachusetts.
Illustrated map showing coastal ocean current around Massachusetts.
Illustrated map showing coastal ocean current around Massachusetts.
Illustrated map showing coastal ocean current around Massachusetts.
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197638
Caracappa-Qubeck, Amy
Illustrated map showing coastal ocean current around Massachusetts.
Illustration
12/29/2011
GeoBankSalinityMap-01.jpg
Caption from Oceanus magazine, Vol. 49, No. 1, page 50:
The Great South Channel is an undersea canyon between shallower Nantucket Shoals and Georges Bank. A relatively fresh coastal current flows south along the New England coast, bringing copepods along with it. In the channel, the coastal current collides with saltier, denser water to form an ocean front. Denser, saltier water sinks beneath the lighter, fresher water. Copepods sinking with the water swim back toward the surface, aggregating in dense patches along the front.
Image of The Day caption:
Around this time of year, whales and other marine animals find rich feeding areas in the Great South Channel, an undersea canyon between shallower Nantucket Shoals and Georges Bank. Scientists think several factors combine to create these vital feeding areas, including currents, winds, tides, and the bathymetry of the seafloor. MIT/WHOI Joint Program graduate student Nick Woods has been pursuing a hypothesis that a relatively fresh coastal current, flowing south along the New England coast, brings an abundance of zooplankton called copepods to the channel. There, the current collides with saltier, denser water to form an ocean front. The copepods aggregate in dense patches along the front, creating a buffet for larger predators.
Illustration by Amy Caracappa-Qubeck
© Woods Hole Oceanographic Institution
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