FSU study in Nature says newfound turbulence in undersea mountains
affects ocean circulation.

http://www.evolutionarycommunism.com/news/n111.html

More than a mile beneath the Atlantic's surface, roughly halfway
between New York and Portugal, seawater rushing through the narrow
gullies of an underwater mountain range much as winds gust between a
city's tall buildings is generating one of the most turbulent areas
ever observed in the deep ocean.