Kyucho induced by intrusion of Kuroshio water in Sagami Bay, Japan

Matsuyama, Masaji; Ishidoya, Hiroshi; Iwata, Shizuo; Kitade, Yujiro; Nagamatsu, Hiroshi

doi:10.1016/s0278-4343(99)00031-x

Cited by 25 publications

(12 citation statements)

References 15 publications

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“…In the case of local large abalone species, onshore larval transport may be linked to current-related phenomena, such as Kyucho (stormy current; e.g. Matsuyama et al 1997, Matsuyama et al 1999. When particles were released from Stn 1, parti- cles accumulated along the southern coast of Miura Peninsula in the P1 simulation.…”

Section: Discussionmentioning

confidence: 99%

Simulating larval dispersal processes for abalone using a coupled particle-tracking and hydrodynamic model: implications for refugium design

Miyake

Kimura²,

Kawamura³

et al. 2009

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 99%

Simulating larval dispersal processes for abalone using a coupled particle-tracking and hydrodynamic model: implications for refugium design

Miyake

Kimura²,

Kawamura³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…Kondisi arus selama waktu observasi mikrostruktur relatif kencang, yaitu berkisar 0,2-0,5 m/det dengan arah konsisten ke barat laut-utara pada kedalaman 100-140 m. Kondisi arus pada saat observasi mikrostruktur ini mengalami penguatan oleh intrusi arus Kuroshio ke dalam Teluk Sagami (e.g. Kawabe and Yoneno, 1987;Matsuyama et al 1999 (Kawabe and Yoneno, 1987;Matsuyama and Iwata, 1985;Matsuyama et al, 1999). Matsuyama et al (1999), menyebutkan bahwa intrusi Kuroshio di Teluk Sagami diindikasikan oleh adanya kenaikan suhu secara tajam dan bergerak secara siklonik mengelilingi Teluk Sagami dengan kecepatan propagasi sebesar 0,6 m/det.…”

Section: Dinamika Perairan Saat Observasiunclassified

“…Kawabe and Yoneno, 1987;Matsuyama et al 1999 (Kawabe and Yoneno, 1987;Matsuyama and Iwata, 1985;Matsuyama et al, 1999). Matsuyama et al (1999), menyebutkan bahwa intrusi Kuroshio di Teluk Sagami diindikasikan oleh adanya kenaikan suhu secara tajam dan bergerak secara siklonik mengelilingi Teluk Sagami dengan kecepatan propagasi sebesar 0,6 m/det. Arus yang terjadi tiba-tiba dan kuat ini dinamai "Kyucho", yang pertama kali dilaporkan oleh Miura (1927) sebagai intrusi air hangat di lapisan permukaan yang berasal dari Kuroshio (Matsuyama et al, 1996).…”

Section: Dinamika Perairan Saat Observasiunclassified

Topographically Induced Turbulence on Continental Shelf Off Jogashima, Sagami Bay, Japan

Naulita¹

2015

J. Ilmu dan Teknologi Kelautan Tropis

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ABSTRACT Direct turbulence measurements using TurboMAP over a “small ridge” on the continental shelf off Jogashima, Sagami Bay, Japan revealed an active layer of topographically induced turbulence. The active layer ( = 10-7 - 10-6 W kg-1) located at mid-depth of 200 – 250 m, occurred on alternate side of “small ridge” depending on the direction of the tidal current. This active layer was accompanied by rebounded-isopycnal surfaces 26.0 - 26.1 σθ , in which all in qualitative manner showed an internal hydraulic flow control on the shelf. The turbulence friction velocity was two order of magnitude lower than observed- in this active layer explaining a less role of bottom friction than hydraulic flow to the high turbulence layer. Keywords: topographically induced turbulence, continental shelf, internal hydraulic flow

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“…It is well known that Kuroshio warm water (KWW) periodically (or intermittently) intrudes into Sagami Bay associated with the Kuroshio fluctuations, and the intruding warm water occasionally induces a stormy current along the northern coast of the bay [e.g., Matsuyama et al , 1999]. This stormy current, called Kyucho in Japanese frequently destroys fishing nets set in the coastal region, while the KWW intrusion (KWWI) plays an important role in planktonic larvae transport processes in the bay.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the KWWI induces upwelling of eutrophic water masses in the regions behind Oshima Island and the Izu Peninsula (IP) associated with generation of eddies and hence significantly contributes to the primary production in the bay [e.g., Atkinson et al , 1987; Kimura et al , 1994]. Given this importance of the KWWI to fisheries, a considerable number of studies have been carried out to clarify the behavior of the intruding warm water mass and the relationship between the Kuroshio fluctuations and current field in the bay [e.g., Uda , 1937; Kimura , 1940, 1942; Teramoto , 1965; Taira and Teramoto , 1981, 1986; Iwata , 1985; Kawabe and Yoneno , 1987; Iwata and Matsuyama , 1989; Matsuyama et al , 1999].…”

Section: Introductionmentioning

confidence: 99%

Wind‐induced Kuroshio warm water intrusion into Sagami Bay

Hinata

Yanagi²,

Takao

et al. 2005

J. Geophys. Res.

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The mechanisms of the periodic Kuroshio warm water intrusion (KWWI) into Sagami Bay through the Oshima West Channel (OWC) and the fluctuation of the current field in the bay were investigated using high‐frequency oceanic radar observation data, satellite imagery, and meteorological data. During the period from 15 December 2000 to 16 January 2001 the Kuroshio took a nonlarge meander path, looping south around the Kii Peninsula and then turning sharply north toward the Izu Peninsula (IP). Kuroshio warm water (KWW) then flowed into Sagami Bay periodically through the OWC on a synoptic timescale of 8–11 days. Statistical analysis of the data indicated that the occurrence of the KWWI and the variability in the Kuroshio front were highly coherent with wind velocity field fluctuations corresponding to the passage of cyclones across northern Japan. When southward to southwestward winds dominated in and around Sagami Bay, the Kuroshio front approached the southern coast of the IP, and then the KWW strongly intruded into the bay through the OWC. When eastward to northeastward winds prevailed, the front moved offshore about 10–20 km, ending the KWWI. The distances of the Kuroshio front movements were consistent with the internal radius of the deformation estimated from conductivity‐temperature‐depth data collected off the IP, suggesting that the Kuroshio front movement was induced by the onshore‐offshore surface Ekman transport associated with the wind velocity field regime shift corresponding to the passage of cyclones. In addition, examination of the vorticity dynamics in the northern part of the bay based on radar‐derived surface current data indicated that the cyclonic circulation generated in the bay was enhanced due to the transport of the positive relative vorticity by the KWWI plus the horizontal convergence accompanied by the stretching of the vorticity.

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Kyucho induced by intrusion of Kuroshio water in Sagami Bay, Japan

Cited by 25 publications

References 15 publications

Simulating larval dispersal processes for abalone using a coupled particle-tracking and hydrodynamic model: implications for refugium design

Simulating larval dispersal processes for abalone using a coupled particle-tracking and hydrodynamic model: implications for refugium design

Topographically Induced Turbulence on Continental Shelf Off Jogashima, Sagami Bay, Japan

Wind‐induced Kuroshio warm water intrusion into Sagami Bay

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