| Summary: | 碩士 === 國立中山大學 === 海洋地質研究所 === 81 === In order to understand the water mass exchange between the
South China Sea and the West Philippine Sea, and to study the
dissolved carbonate system in the seas surrounding Taiwan, we
participated in five WOCE cruises (cruise 257, 262, 266, 287,
316)aboard R/V Ocean Researcher 1. The areas studied were the
South China Sea,the West Philippine Sea and the Luzon Strait.
Temperature, Salinity, pH alkalinity and total carbon dioxide
were measured. Our data indicate that because of the
interference of the submarine topography and the Kuroshio
axis, there exists a " front " near the Lan Yu island. East
of it, the water mass belongsto the West Philippine Sea, On
the west is the mixed water of the South China Sea and the West
Philippine Sea. The South China Sea Deep Water should have the
characteri- stics similar to the water at about 2200 m in the
West Phili- ppine Sea. The calculated results from the
residence time, the inorganic carbon dissolution rate and the
organic carbon decomposition rate show that the differences
between these two water masses should be less than 0.017 in
pH, 3.6ueq/kg in alkalinity and 5.6umol/kg in total carbon
dioxide, respec- tively. The measured results show that
there are no dis- tinguishable difference between these
two water masses, implying a short deep water residence time
of approximately 40 yrs. Kuroshio and the North Pacific
Intermediate Water occupy the Luzon Strait in summer(cruise
287). In the winter(cruise 266 ), sea water of Luzon strait
was influenced by Kuroshio only north of 19°N. The " intrusion
" of Kuroshio in winter, however, was stronger than in summer.
Total carbon dioxide obtained by potentiometric titration
correlate well with that obtained by coulometry.Nevertheless,
systematic analytical difference exists between these two
methods: Normalized total carbon dioxide(potentiometric
titration)= 0.9814 X Normalized total carbon dioxide(
coulometry)+63
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