Variation of the sea surface temperature distribution across the Kuroshio in the Tokara Strait

Nagata, Yutaka; Takeshita, Katsuichi

doi:10.1007/bf02109274

Cited by 22 publications

(20 citation statements)

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“…Studies of frontal disturbances of the Kuroshio in upstream regions of our study showed similar periods as the 11-20 days for the East China sea (Eguchi et al, 1982;Shibata, 1983;Sugimoto et al, 1988;Qiu et al, 1990), 20 and 15 to 30 days for the Tokara Strait (Nagata and Takeshita, 1985;Akiyama and Ameya, 1991), and 20 and 50 days for the Enshu-nada and Kumano-nada seas (Kimura and Sugimoto, 1983;Kasai et al, 1993). Sugimoto et al (1992a) observed that streamers spiraling around the WCR 86B, in the Perturbed Area east of Japan, had a generation frequency from the Kuroshio Extension of once in 20 days and 40-50 days.…”

Section: Short-term and Seasonal Variability Of The Northward Spreadsupporting

confidence: 82%

Spreading of warm water from the Kuroshio Extension into the Perturbed Area

Sainz-Trápaga

Sugimoto

1998

J Oceanogr

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The path of the Kuroshio Extension describes two stationary meanders with crests at approximately 144°E and 150°E. The short-term meridional fluctuations of the warm water spreading northward from the first crest at the surface and its vertical structure were analyzed by using 5-day-mean surface temperature maps published by JAFIC, monthly 100-m-depth temperature maps edited by the JMA, and CTD data obtained by the R.Vs. Kofu-Maru, Hakuho-Maru and Tansei

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Section: Short-term and Seasonal Variability Of The Northward Spreadsupporting

confidence: 82%

Spreading of warm water from the Kuroshio Extension into the Perturbed Area

Sainz-Trápaga

Sugimoto

1998

J Oceanogr

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“…We may disregard the fluctuations with the period range, because those do not relate to the front migration. The significant time range from 17 to 50 days is nearly equal to that of the Kuroshio front migration in the Tokara Strait (Nagata and Takeshita, 1985;Akiyama and Ameya, 1991). The distribution caused by the front migration is thought to be mainly reflected in the sea level fluctuation at Nakano-shima, because energy densities of the sea level fluctuation at Nakano-shima and of the slope fluctuations from Naze to Nakano-shima and from Nakano-shima to Ohdomari relatively concentrate at nearly the same period range (Fig.…”

Section: Distribution Fluctuation Of the Volume Transport In The Tokamentioning

confidence: 96%

“…A dominant temperature rise happened on the days from 26 to 28 February and the resulted higher temperature continued into 4 March. The period of the temperature rising happened together a northward migration of the Kuroshio front in the Tokara Strait shown in a space-time diagram of the SST produced by Nagata and Takeshita (1985). That is, the northward shift of the Kuroshio front in the Tokara Strait causes the inflow into the Kagoshima Bay.…”

Section: Effects Of the Migration To Kagoshima Bay And To The Obcmentioning

confidence: 99%

“…The front is well defined by sea surface temperature (SST) from late autumn to early summer. By analysing the SST measured by a ferryboat regularly crossing the Tokara Strait, Nagata and Takeshita (1985) found the Kuroshio front migrating between Nakano-shima and Sata-misaki with a period range from 15 to 30 days. However, they supposed that the period varied from year to year.…”

Section: Introductionmentioning

confidence: 99%

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Fluctuation in volume transport distribution accompanied by the Kuroshio front migration in the Tokara Strait

1993

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A relation between migration of the Kuroshio front and fluctuation of distribution of volume transport in the Tokara Strait was described, using sea level records at five tide gauge stations around the strait and data which were composed of sea surface temperature, XBT casts, sea surface salinity and velocities at 20 m, 75 m and 150 m depths taken en route a ferryboat. The Kuroshio front extends to about 150 m depth. The sea surface salinity and the horizontal velocities abruptly change at the front. There is a good correlation in a period range from half a month to two months between the migration of the front, which is not only at the surface but also in the subsurface, and the sea level fluctuation at Nakano-shima. A northward migration of the front with a period range from 17 to 50 days decreases the transport in the southern strait between Naze and Nakano-shima but increases in the northern strait between Nakano-shima and Sata-misaki. The northward migration intensifies inflow into Kagoshima Bay and the Ohsumi Branch Current. Correlation between the transport in the northern strait and the Ohsumi Branch Current is significant in the period range from 30 to 50 days. In this significant period range, the former leads the latter by about 3 days.

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“…Sea surface temperature (SST) and velocity observed by using ferry boats are useful for the analyses. Nagata and Takeshita (1985) analyzed the SST data in the Tokara Strait obtained by a ferry boat, and found that the continuous observation of the SST across the strait yields a good tool for monitoring fluctuations of the Kuroshio path. Sugimoto and Kobayashi (1987) developed the observational system for ferry boats to obtain the sea surface temperature and current velocity with ship drift simultaneously.…”

Section: Introductionmentioning

confidence: 99%