five Click to see full answer. Furthermore, how many subtropical gyres exist worldwide?How many main currents exist within each subtropical gyre? There are five subtropical gyres: North Pacific, South Pacific, North Atlantic, South Atlantic, and the Indian Ocean below the equator.One may also ask, how many gyres are there? five Also know, what are subtropical gyres? In oceanography, a subtropical gyre is a ring-like system of ocean currents rotating clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere caused by the Coriolis Effect. They generally form in large open ocean areas that lie between land masses.How many currents does it take to make a subtropical oceanic gyre?The gyre has a clockwise circular pattern and is formed by four prevailing ocean currents: the North Pacific Current to the north, the California Current to the east, the North Equatorial Current to the south, and the Kuroshio Current to the west.