Fuzzy set study of water mass mixing in the source region of the Tsushima Warm Current

Lu Zhongfa

doi:10.1007/BF02849679

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Fuzzy set study of water mass mixing in the source region of the Tsushima Warm Current

Updated：2023-05-16

- Fuzzy set study of water mass mixing in the source region of the Tsushima Warm Current
- Journal of Oceanology and Limnology Vol. 8, Issue 4, Pages: 336-347(1990)
- Affiliations：
  
  First Institute of Oceanography
- Author bio：
- Funds：
- DOI：10.1007/BF02849679
  CLC：
- Published：1990
- Accepted：
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Zhongfa, L. Fuzzy set study of water mass mixing in the source region of the Tsushima Warm Current., Chin. J. Ocean. Limnol. 8, 336–347 (1990). https://doi.org/10.1007/BF02849679
DOI：

Zhongfa, L. Fuzzy set study of water mass mixing in the source region of the Tsushima Warm Current., Chin. J. Ocean. Limnol. 8, 336–347 (1990). https://doi.org/10.1007/BF02849679 DOI：

摘要

Abstract

PFS-Fuzzy classification (Lu

1989) was used on observational data obtained during a cruise (July–August

1987) to classify the water masses in the source area of the Tsushima Warm Current. Their mixing features were studied by using numerical index analysis of fuzzy sets. The calculated results showed there are nine water masses belonging to three basic types. The analyses suggest that

though

in summer

the Surface Water of the Tsushima Warm Current located in a strongly mixed area is a mixture of the East China Sea Mixed Water

the Kuroshio Surface Water and the Kyushu Westerm Coastal Water

it originates mainly from the Kuroshio Surface Water and its deep water comes from the Kuroshio Subsurface Water. This study reveals that 1) regions such as the intensely mixed region

the frontal zone and the transition zone

Water

it originates deep water comes from water

usually have a higher fuzzy degree; 2) water masses with higher stability and little modification have a lower fuzzy degree; and 3) mixed water has a medium fuzzy degree. The differences and similarities in the size and density of these water masses and other waters are discussed.

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Keywords

references

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