Velocity fluctuations of the Kuroshio near the Izu Ridge and their relationship to current path

Taira, Keisuke; Teramoto, Toshihiko

doi:10.1016/0198-0149(81)90055-8

Cited by 31 publications

(9 citation statements)

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“…The same general comment would apply to a comparison of 152øE data with existing 4000 m depth KE data along 70øW in the North Atlantic[Schmitz, 1977]. The abyssal and intermediate depth K• values along 152øE are larger than those found near the Kuroshio west of the South Honshu Ridge[Taft, 1978], and comparable to K• estimates at about 1700 m depth over this ridge[Taira and Teramoto, 1981]. At 4000 m, the 152øE and 55øW K• values approach each other near 28 ø and 31ø-32øN, respectively, and are approximately the same as those found by lmawaki and Takano[1982] near 30øN in the vicinity at 147øEgeneral, a very low energy abyssal interior relative to western regions seems to be characteristic of both oceans.The lower latitudinal maximum for abyssal K• at 152øE relative to either 55 ø or 70øW could represent a general difference between the two oceans or it could be due to differences in the relative zonal location for the existing datasets.…”

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confidence: 70%

Recent long‐term moored instrument observations in the western North Pacific

Schmitz¹,

Niiler²,

Bernstein³

et al. 1982

J. Geophys. Res.

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Selected results based on the first deployment (duration was 298-324 days depending on specific location) of an array of 38 current-temperature meters on 10 moorings along 152øE from 28øN to 41øN are discussed. Abyssal eddy kinetic energies along 152øE near the Kuroshio Extension are a factor of 2 to possibly 5 lower than those previously observed at similar depths close to the energetic regions of the Gulf Stream. The thermocline kinetic energy frequency distribution at 28øN, 152øE is similar in shape to that observed at a site near 31øN, 70øW (but not 28øN, 70øW), although the total energy levels are quite different. However, the distance from the corresponding strong current regimes is nearly the same. The largest scale latitudinal distribution of the off-diagonal component of horizontal Reynolds' stress has a characteristic general shape, that is, negative to the south and positive to the north of the Gulf Stream or Kuroshio Extension or mid-latitude jet, at all depths for all longitudes where such data are available in both oceans, and in the numerical experiments examined.

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mentioning

confidence: 70%

Recent long‐term moored instrument observations in the western North Pacific

Schmitz¹,

Niiler²,

Bernstein³

et al. 1982

J. Geophys. Res.

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“…The intrusion is associated with the local "S" shape meandering of the Kuroshio path and spreads into the whole coastal region. Taira and Teramoto (1981) measured the current velocity in the large meandering Kuroshio and they found fluctuations in two periodic bands; one is near 33 days and the other is near 100 days. Their study agreed with our result that the fluctuations of the Kuroshio have two characteristic periods but disagreed with respect to the periods.…”

Section: Discussionmentioning

confidence: 99%

Warm water intrusion from the Kuroshio into the coastal areas south of Japan

1993

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“…We can explain this apparent discrepancy by looking at the main elements of present-day ocean-water circulation relative to the control that bathymetry exerts over turbidity currents. The western boundary current of the North Pacific is known as the Kuroshio Current (Taft 1972(Taft , 1978White & McCreary 1976;Taira & Teramoto 1981). This current is swift and deep (equivalent to the Gulf Stream in the North Atlantic), and it acts as the dominant agent for east to NE-directed transport of surface-water plumes from Kyushu and western Shikoku into the Muroto transect area of the subduction margin (Fig.…”

Section: Q U a T E R N A R Y D I S P E R S A L S Y S T E M ( < 0 4 mentioning

confidence: 99%

Late Cenozoic evolution of the Nankai trench-slope system: evidence from sand petrography and clay mineralogy

Underwood

Fergusson

2005

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Submarine slope systems in subduction zones evolve in response to a combination of tectonic and sedimentary forcing. It can be difficult to determine how and when tectonic forcing affects sedimentation, especially when investigating ancient rock successions, but one of the more reliable indicators is a change in sediment composition. During Leg 190 of the Ocean Drilling Program, sandy turbidites were recovered from a Quaternary trench wedge (Nankai Trough), a Pliocene-Pleistocene slope basin, the underlying Pliocene-Miocene accretionary prism, and a Miocene turbidite facies in the Shikoku Basin. Differences in detrital provenance between the sand and clay-sized fractions indicate that turbidity currents did not follow pathways of suspended-sediment transport during the past 10 Ma. During the middle and late Miocene, the sand probably was eroded from a newly exposed accretionary complex (Shimanto Belt). In contrast, high contents of detrital smectite in Miocene mudstones (> 50 wt% of the <2 fxm size fraction, relative to illite, chlorite + kaolinite, and quartz) point to a strong volcanic component of suspended-sediment input (Izu-Bonin island arc). The sand in accreted Pliocene turbidites was also eroded from the Shimanto Belt and transported by transverse flow down the insular slope. The trench-wedge facies then switched to axial flow during the Quaternary, when the sand supply tapped a mixed volcanicmetasedimentary provenance in the rapidly uplifted Izu-Honshu collision zone. Progressive depletion of smectite during the Pliocene and Pleistocene (<20 wt%) points to increased movement of illite-and chlorite-rich clay toward the east and NE from sources on Kyushu and Shikoku. That shift in mud composition coincides with intensification of the North Pacific western boundary current (Kuroshio Current) at approximately 3 Ma. Overall, the depositional system in the Nankai Trough and Shikoku Basin shifted its sand sources because of regional tectonics, whereas the suspendedsediment budget was modulated by hemispheric changes in ocean-water circulation.

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Velocity fluctuations of the Kuroshio near the Izu Ridge and their relationship to current path

Cited by 31 publications

References 1 publication

Recent long‐term moored instrument observations in the western North Pacific

Recent long‐term moored instrument observations in the western North Pacific

Warm water intrusion from the Kuroshio into the coastal areas south of Japan

Late Cenozoic evolution of the Nankai trench-slope system: evidence from sand petrography and clay mineralogy

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