<P> In northern Panthalassa there was mid-latitude westerlies north of 60 ° N with easterlies between 60 ° N and the Equator . Atmospheric circulation north of 30 ° N is associated with the North Panthalassa High which created Ekman convergence between 15 ° N and 50 ° N and Ekman divergence between 5 ° N and 10 ° N. A pattern which resulted in northward Sverdrup transport in divergence regions and southward in convergence regions . Western boundary currents resulted in an anti-cyclonic subtropical North Panthalassa gyre at mid-latitudes and a meridional anti-cyclonic circulation centred on 20 ° N . </P> <P> In tropical northern Panthalassa trade winds created westward flows while equatorward flows were created by westerlies at higher latitudes . Consequently, trade winds moved water away from Gondwana towards Laurasia in the northern Panthalassa Equatorial Current . When the western margins of Panthalassa were reached intense western boundary currents would form the Eastern Laurasia Current . At mid-latitudes the North Panthalassa Current would bring the water back east where a weak Northwestern Gondwana Current would finally close the gyre . The accumulation of water along the western margin coupled with the Coriolis effect would have created a Panthalassa Equatorial Counter Current . </P> <P> In the southern Panthalassa the four currents of the subtropical gyre, the South Panthalassa Gyre, rotated counterclockwise . The South Equatorial Panthalassa Current flowed westward between the Equator and 10 ° S into the western, intense South Panthalasssa Current . The South Polar Current then completes the gyre as the Southwestern Gondwana Current . Near the poles easterlies created a subpolar gyre that rotated clockwise . </P>

Which ocean basin is a remnant of the universal ocean panthalassa