Variability of the Pacific North Equatorial Current and its implications on Japanese eel (Anguilla japonica) larval migration
Hsu, AC; Xue, HJ; Chai, F; Xiu, P; Han, YS; chentien.hsu@maine.edu
2017
发表期刊FISHERIES OCEANOGRAPHY
卷号26期号:3页码:251-267
摘要The zonal velocity produced by a Regional Ocean Modeling System (ROMS)-based Pacific Ocean circulation model was validated against in situ measurements along the 137 degrees E longitude. The Pacific model successfully reproduced the position and the shape of the North Equatorial Current (NEC) as well as the latitude of maximum surface velocity in the NEC region (8-17 degrees N). The flow field produced by the Pacific model was then used to conduct numerical Lagrangian experiments, in which passive particles were released along a transect (142.5 degrees E, 12.5-17 degrees N) that traverses the known Japanese eel spawning area, and the effects of NEC strength and bifurcation latitude on the particle advection in the northwest Pacific were studied. Our results suggest that, in the 20-yr period (1993-2012), the variability of the currents alone can cause interannual variability of one order of magnitude in the Kuroshio Entrance (KE), the percentage of particles entering the Kuroshio, the range of which varies from 43% in 1997 to 6% in 2012. The yearly-averaged KE is not sensitive to the NEC bifurcation latitude. Instead, it is controlled by the average zonal velocity of a fixed domain (125-143 degrees E, 13.5-17 degrees N) and related to a recently-developed climate index, the Philippines-Taiwan Oscillation (PTO). During the positive phase of the PTO, the zonal velocity in the domain, hence the yearly-averaged KE, increases, and the opposite is true in the negative phase of the PTO. Considering only the trajectories, diel vertical migrations (DVM) in the top 400 m do not significantly affect Japanese eel larval transport, as incorporating DVM schemes does not increase the KE.
部门归属[Hsu, Ango C.; Xue, Huijie; Chai, Fei] Univ Maine, Sch Marine Sci, Orono, ME 04469 USA; [Xue, Huijie; Xiu, Peng] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Han, Yu-San] Natl Taiwan Univ, Inst Fisheries Sci, Taipei 106, Taiwan; [Han, Yu-San] Natl Taiwan Univ, Coll Life Sci, Dept Life Sci, Taipei 106, Taiwan
关键词Interannual Variability Japanese Eel Lagrangian Modeling Larval Migration North Equatorial Current
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16446
专题热带海洋环境国家重点实验室(LTO)
通讯作者chentien.hsu@maine.edu
推荐引用方式
GB/T 7714
Hsu, AC,Xue, HJ,Chai, F,et al. Variability of the Pacific North Equatorial Current and its implications on Japanese eel (Anguilla japonica) larval migration[J]. FISHERIES OCEANOGRAPHY,2017,26(3):251-267.
APA Hsu, AC,Xue, HJ,Chai, F,Xiu, P,Han, YS,&chentien.hsu@maine.edu.(2017).Variability of the Pacific North Equatorial Current and its implications on Japanese eel (Anguilla japonica) larval migration.FISHERIES OCEANOGRAPHY,26(3),251-267.
MLA Hsu, AC,et al."Variability of the Pacific North Equatorial Current and its implications on Japanese eel (Anguilla japonica) larval migration".FISHERIES OCEANOGRAPHY 26.3(2017):251-267.
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