In Northeastern Taiwan Waters Upwelling System In Summer And Winter Temperature And Salinity, Nutrients 3d Structure

According to the World Ocean Atlas 2005 released by NOAA in 2007with the research and development of Matlab computer programs about dataanalysis and figure manifestation, the three-dimension temperature, salinityand nutrients structures of the upwelling system of northeastern Taiwan insummer and winter are displayed and studied, and the influences of Kuroshio,Taiwan Warm Current and continental shelf current from Eastern China Seaon the upwelling system are analyzed.In August, the cold eddy is divided into the upper and the bottom parts;In February, the cold eddy only exists in the water layer between 109m and150m. The upwelling in the center of the cold eddy is continuing, because thebottom colder water from the shelf of the Eastern China Sea and the warmerwater from the bottom of Taiwan Strait wedge the water layer between 100mand 138m, the isotherm which token Cold eddy is not close there. At theregion where Kuroshio intrudes the shelf of the East China Sea towardnortheast is stronger, Cold Eddy-upwelling system becomes stronger. At thelayer where Kuroshio intrudes the shelf toward northwest is strong, ColdEddy-upwelling system becomes weaker or disappear.From the three-dimension salinity structure in northeastern Taiwan, wecan hardly find the highest salinity center which corresponds to the closedCold eddy, but we can see the isohaline up warped in the section ofupwelling centre. On the 25.5°N section, there is a closed core ofhigh-salinity around 152m, Whenever winter and summer, the Centre salinityof the closed core is greater than 34.82‰. Affected by the bottom water fromTaiwan Strait and the Kuroshio intrudes, there exists a lower salinity eddyfrom the 128m to 150 m water layer in summer and 123m to 150 m waterlayer in winter; In the upwelling centre of Section of 25.5°N can find thewarm water from the Taiwan Strait bottom, but we can not find the EastChina Sea continental shelf current in section 122.5°E.In the phosphate three-dimensional structure, there are two hump placein summer phosphate isolines, one is 26.5°N, 123.5°E the other is 122.5°E,25°N, but in the winter isolines only one:26.5°N, 123.5°E; These humps andthe isoline of the thermohaline's are not completely coincide, because thedistribution of nutrients is not only closely related to the distribution of the thermohaline structure,but also affected by planktons and river runoff intothe sea; The humps of the phosphates isolines which from 24°N to24.5°N atthe section of 123.5°E and 122.5°E in summer, 123.5°E section in winter arerelated in the front eddy near the Kuroshio curve off eastern part of Taiwan;In summer the lower humps of the phosphate closure phenomenon in thesurface of the three-dimension block water are related to the large summerrunoff, and in winter, the phenomenon no longer exist.