(PDF) Kuroshio And Oyashio Currents (2001) | Bo Qiu | 187 Citations (2024)

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Deep-sea Research Part Ii-topical Studie...

Abstract: Satellite telemetry of 43 juvenile loggerhead sea turtles (Caretta caretta) in the western North Pacific together with satellite-remotely sensed oceanographic data identified the Kuroshio Extension Bifurcation Region (KEBR) as a forage hotspot for these turtles. In the KEBR juvenile loggerheads resided in Kuroshio Extension Current (KEC) meanders and the associated anti-cyclonic (warm core) and cyclonic (cold core) eddies during the fall, winter, and spring when the KEC water contains high surface chlorophyll. Turtles often remained at a specific feature for several months. However, in the summer when the KEC waters become vertically stratified and surface chlorophyll levels are low, the turtles moved north up to 600 km from the main axis of KEC to the Transition Zone Chlorophyll Front (TZCF). In some instances, the loggerheads swam against geostrophic currents, and seasonally all turtles moved north and south across the strong zonal flow. Loggerhead turtles traveling westward in the KEBR had their directed westward movement reduced 50% by the opposing current, while those traveling eastward exhibited an increase in directed zonal movement. It appears, therefore, that these relatively weak-swimming juvenile loggerheads are not passive drifters in a major ocean current but are able to move east, west, north, and south through this very energetic and complex habitat. These results indicate that oceanic regions, specifically the KEBR, represent an important juvenile forage habitat for this threatened species. Interannual and decadal changes in productivity of the KEBR may be important to the species’s population dynamics. Further, conservation efforts should focus on identifying and reducing threats to the survival of loggerhead turtles in the KEBR. r 2006 Elsevier Ltd. All rights reserved.

Progress in Earth and Planetary Science

TL;DR: Foraminiferal proxy data suggests eastward deflection of the Kuroshio Current from its present path at 24 °N into the Pacific Ocean due to East Taiwan Channel restriction during the Last Glacial Maximum.

Deep-sea Research Part Ii-topical Studie...

TL;DR: The Oyashio shelf region and the seasonally ice-covered areas north of Hokkaido are highly productive, supporting a wide range of species including marine mammals, seabirds and commercially important species in the western subarctic Pacific as discussed by the authors.

Journal of Oceanography

TL;DR: In this paper, a portion of seawater for dissolved species (D) was passed through a 0.2 µm Nuclepore filter and acidified to pH 2.2 with HCl and HF.

TL;DR: To the best of the knowledge, this is the first report that Pu contamination, which originated from Bikini and Enewetak nuclear weapon test series in the 1950s, has extended westwards as far as the Japanese coast.

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TL;DR: In this article, what drives the ocean currents? temperature, salinity, density and the oceanic pressure field the Coriolis force, geostropy, Rossby waves and the westwood intensification Ekman layer transports, Ekman pumping and the Sverdrup balance water mass formation, subduction and oceanic heat budget Antarctic oceanography Arctic oceanography.

TL;DR: In this paper, the authors describe ocean dimensions, shapes and bottom materials Physical properties of sea-water Typical distributions of water characteristics in the oceans Water, salt and heat budgets of the oceans Instruments and methods Circulation and water masses of oceans Coastal oceanography Some directions for future work Appendix Bibliography Index.

Journal of Physical Oceanography

TL;DR: In this article, a composite of the paths of the Kuroshio (i.e., the 12°C isotherm) from the individual seasonal maps, and the total variance map, finds nodes (minima) and anti-nodes (e.g., maxima) of variability to have existed along the mean Kuroshia path.

Journal of Physical Oceanography

TL;DR: In this paper, the variations of the Kuroshio current path and their relations with current velocity, volume transport, and upstream position were examined using sea level data, and it was shown that the formation and decay of the large meander are associated with the velocity and position of the kokara Strait south of Kyushu.

Paleoceanography

Progress in Oceanography

Nature

Astronomy and Astrophysics