Density‐dependent egg production in chub mackerel in the Kuroshio Current system

2020 ◽  
Vol 30 (1) ◽  
pp. 38-50
Author(s):  
Akinori Takasuka ◽  
Michio Yoneda ◽  
Yoshioki Oozeki
Keyword(s):  
Egg Production ◽  
Current System ◽  
Kuroshio Current ◽  
Chub Mackerel ◽  
Density Dependent ◽  
The Kuroshio

scholarly journals Validation of the Kuroshio Current System in the dual-domain Pacific Ocean Model framework

2012 ◽  
Vol 105 ◽  
pp. 102-124 ◽  
Author(s):  
Yu-Heng Tseng ◽  
Mao-Lin Shen ◽  
Sen Jan ◽  
David E. Dietrich ◽  
Chia-Ping Chiang
Keyword(s):  
Pacific Ocean ◽  
Current System ◽  
Kuroshio Current ◽  
Ocean Model ◽  
Model Framework ◽  
Dual Domain ◽  
The Kuroshio

scholarly journals Phase Synchronisation in the Kuroshio Current System

2019 ◽  
Author(s):  
Ann Kristin Klose ◽  
René M. van Westen ◽  
Henk A. Dijkstra
Keyword(s):  
Wind Stress ◽  
North Pacific ◽  
Time Scale ◽  
Rossby Waves ◽  
Model Simulation ◽  
Current System ◽  
Global Climate Model ◽  
Kuroshio Current ◽  
Study Phase ◽  
The Kuroshio

Abstract. The Kuroshio Current System in the North Pacific displays path transitions on a decadal time scale. It is known that both internal variability involving barotropic and baroclinic instabilities and remote Rossby waves induced by North Pacific wind-stress anomalies are involved in these path transitions. However, the precise coupling of both processes and its consequences for the dominant decadal transition time scale are still under discussion. Here, we analyse the output of a multi-centennial long high-resolution global climate model simulation and study phase synchronisation between Pacific zonal wind-stress anomalies and Kuroshio Current System path variability. We apply the Hilbert transform technique to determine the phase and find epochs where such phase synchronisation appears. The physics of this synchronisation is shown to occur through the effect of the vertical motion of isopycnals, as induced by the propagating Rossby waves, on the instabilities of the Kuroshio Current System.

Occurrence and density of Pacific sauryCololabis sairalarvae and juveniles in relation to environmental factors during the winter spawning season in the Kuroshio Current system

2014 ◽  
Vol 23 (4) ◽  
pp. 304-321 ◽  
Author(s):  
Akinori Takasuka ◽  
Hiroshi Kuroda ◽  
Takeshi Okunishi ◽  
Yugo Shimizu ◽  
Yuichi Hirota ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Current System ◽  
Kuroshio Current ◽  
Spawning Season ◽  
The Kuroshio

New progress of the Kuroshio Current System research by using ADEOS-OCTS

2000 ◽  
Vol 25 (5) ◽  
pp. 967-968
Author(s):  
Yoshiaki Toba ◽  
Hiroshi Murakami
Keyword(s):  
Current System ◽  
Kuroshio Current ◽  
System Research ◽  
The Kuroshio

scholarly journals Intrinsic low-frequency variability and predictability of the Kuroshio Current and of its extension

2014 ◽  
Vol 5 (2) ◽  
pp. 79 ◽  
Author(s):  
Stefano Pierini ◽  
Henk A. Dijkstra ◽  
Mu Mu
Keyword(s):  
Particle Filtering ◽  
Current System ◽  
Kuroshio Extension ◽  
Low Frequency ◽  
Kuroshio Current ◽  
Western Boundary ◽  
Boundary Current ◽  
Model Studies ◽  
Low Frequency Variability ◽  
The Kuroshio

Investigations of the intrinsic low-frequency variability and predictability of the Kuroshio Current and of its extension jet (the Kuroshio Extension, KE) are reviewed. The Kuroshio and KE in the North Pacific constitute a western boundary current system of great relevance from climatological and ecological viewpoints. Both the Kuroshio south of Japan and the KE display remarkable changes of bimodal character on interannual time scales that are believed to be intrinsic, i.e., basically generated by nonlinear oceanic mechanisms rather than by direct atmospheric forcing. Model studies of the Kuroshio and KE with climatological forcing are thus reviewed. Moreover, as these changes are chaotic, their predictability requires peculiar mathematical approaches: theoretical results concerning this important issue are therefore reviewed as well. Model studies aimed at determining the optimal precursors and optimally growing initial errors for the Kuroshio are described. Techniques based on Lyapunov exponents (including their Lagrangian extension) and on data assimilation techniques (namely, sequential importance sampling using a particle-filtering approach) are reviewed for the KE. The key problem of how to identify the areas where targeted observations can improve the forecast is also addressed. The role of wind forcing in triggering the KE oscillations is finally considered.

scholarly journals Phase synchronisation in the Kuroshio Current System

Ocean Science ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 435-449
Author(s):  
Ann Kristin Klose ◽  
René M. van Westen ◽  
Henk A. Dijkstra
Keyword(s):  
Wind Stress ◽  
North Pacific ◽  
Rossby Waves ◽  
Climate Model ◽  
Model Simulation ◽  
Current System ◽  
Global Climate Model ◽  
Kuroshio Current ◽  
Study Phase ◽  
The Kuroshio

Abstract. The Kuroshio Current System in the North Pacific displays path transitions on a decadal timescale. It is known that both internal variability involving barotropic and baroclinic instabilities and remote Rossby waves induced by North Pacific wind stress anomalies are involved in these path transitions. However, the precise coupling of both processes and its consequences for the dominant decadal transition timescale are still under discussion. Here, we analyse the output of a multi-centennial high-resolution global climate model simulation and study phase synchronisation between Pacific zonal wind stress anomalies and Kuroshio Current System path variability. We apply the Hilbert transform technique to determine the phase and find epochs where such phase synchronisation appears. The physics of this synchronisation are shown to occur through the effect of the vertical motion of isopycnals, as induced by the propagating Rossby waves, on the instabilities of the Kuroshio Current System.

Extracting Lagrangian coherent structures in the Kuroshio current system

2019 ◽  
Vol 69 (6) ◽  
pp. 641-656
Author(s):  
Fenglin Tian ◽  
Qiu He ◽  
ZhanPing Liu ◽  
Ge Chen
Keyword(s):  
Coherent Structures ◽  
Current System ◽  
Kuroshio Current ◽  
Lagrangian Coherent Structures ◽  
The Kuroshio
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