A Theory of the Mechanism of the Generation of the Cold Water Region in the Offing of Enshûnada

A Suppimentary Note to the Previous Paper “A Theory of the Mechanism of the Generation of the Cold Water Region in the Offing of Enshûnada ”

“…Next, to generate a cold water region, the intermediate water must be supplied to this area which in the future occupies the central portion of the circular region. This cold water supply can only occur in the offing of EnshiMada, namely at the corner of the acute angle sea (NAN'NITI 1958). In this stage, the horizontal pressure gradient becomes weaker, ap 10 x 10 -3 erg/cm .…”

“…Usually observers have seen by experience that weaker currents are apt to vary much in direction than strong currents, and that the latter do not fluctuate in their directions easily (NAN'NITI 1954, 1958. Now take the x-coordinate to cross-stream, then the variation of direction 0 may be given by O=tan-1 u/ V+v where V is mean velocity and u, v are the x-and y-components of fluctuations respectively due to the perturbation dV.…”

“…In conclusion, the author proposed the theory (NAN'NITI, 1958) that the upwelling intermediate water will push the weaker Kuroshio stream towards the open sea, and the cold water region will be formed.…”

“…As already mentioned (NAN'NITI 1958), the period of the development of the cold water region and the velocity of the Kuroshio is supposed to be about 15 years. Now let us consider the necessary conditions to the fluctuation in the current's directions.…”