Explanation of the ocean current map
Explanation of "Kuroshio axis"
gKuroshio pathh is shown in the area between Yonaguni Island and off Boso Peninsula. And gKuroshio extensionh is also indicated.
- The width of Kuroshio is 40 nautical mile (nm) from the northern edge of the Kuroshio Current.
- The Kuroshio axis has the maximum surface current. It exists at about 13 nm from the northern edge of the Kuroshio Current.
- Northern edge of the Kuroshio Current is determined from synthetically analyzing each area as below.
- The area where the current velocity is faster than about 2 knot. Those current data is observed by ships, HF radars and drifting / mooring buoys.
- The area where the contours for sea surface temperature (SST) are thick. This SST data is derived from ships and satellites.
- The area where the sea surface gradient derived from satellite altimeter increases sharply.
- The area where the contours for the temperature at the layer of 200m are thick around 15-16.
- The area where the current becomes faster suddenly south of a cold eddy on the Enshu Sea.
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Last Update: Jan 9, 2009