Seasonal and interannual variability of the North Equatorial Current, the Mindanao Current, and the Kuroshio along the Pacific western boundary

1996 ◽  
Vol 101 (C5) ◽  
pp. 12315-12330 ◽  
Author(s):  
Bo Qiu ◽  
Roger Lukas
Keyword(s):  
Interannual Variability ◽  
North Equatorial Current ◽  
Western Boundary ◽  
Seasonal And Interannual Variability ◽  
The North ◽  
The Pacific ◽  
Equatorial Current ◽  
Mindanao Current ◽  
The Kuroshio

scholarly journals A Climatological Interpretation of the Circulation in the Western South Pacific*

2002 ◽  
Vol 32 (9) ◽  
pp. 2492-2508 ◽  
Author(s):  
Tangdong Qu ◽  
Eric J. Lindstrom
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Western Boundary ◽  
Guinea Coast ◽  
Boundary Currents ◽  
The North ◽  
Intermediate Layers ◽  
Water Property ◽  
The Pacific ◽  
Equatorial Current

Abstract Time-averaged circulation is examined using historical hydrographic data near the Australia and Papua New Guinea coast in the Pacific. By averaging the data along isopycnal surfaces in a 0.5° × 0.5° grid, the authors are able to show many detailed phenomena associated with the narrow western boundary currents, including the vertical structure of the bifurcation latitude of the South Equatorial Current (SEC) and the connection between the Solomon and Coral Seas. The bifurcation latitude of the SEC is found to move southward from about 15°S near the surface to south of 22°S in the intermediate layers. The origin of the Great Barrier Reef Undercurrent (GBRUC) is identified to be at about 22°S. Farther to the north, the GBRUC intensifies underlying the surface East Australian Current, and merges with the North Queensland Current (NQC) at about 15°S. The NQC turns eastward to flow along the Papua New Guinea coast and feeds into the New Guinea Coastal Undercurrent (NGCUC) through the Louisiade Archipelago. Further analysis shows that there is a strong water property connection between the Coral and Solomon Seas, confirming the earlier speculation on the water mass origins of the NGCUC.

scholarly journals The Pacific North Equatorial Current: New Insights from the Origins of the Kuroshio and Mindanao Currents (OKMC) Project

Oceanography ◽  
2015 ◽  
Vol 28 (4) ◽  
pp. 24-33 ◽  
Author(s):  
Bo Qiu ◽  
Daniel Rudnick ◽  
Ivana Cerovecki ◽  
Bruce Cornuelle ◽  
Shuiming Chen ◽  
...  
Keyword(s):  
North Equatorial Current ◽  
The Pacific ◽  
Equatorial Current ◽  
The Kuroshio

scholarly journals Effect of El Niño on migration and larval transport of the Japanese eel (Anguilla japonica)

2007 ◽  
Vol 64 (7) ◽  
pp. 1387-1395 ◽  
Author(s):  
Heeyong Kim ◽  
Shingo Kimura ◽  
Akira Shinoda ◽  
Takashi Kitagawa ◽  
Yoshikazu Sasai ◽  
...  
Keyword(s):  
El Niño ◽  
Western North Pacific ◽  
El Nino ◽  
Anguilla Japonica ◽  
Japanese Eel ◽  
Larval Transport ◽  
North Equatorial Current ◽  
The North ◽  
Equatorial Current ◽  
The Kuroshio

Abstract Kim, H., Kimura, S., Shinoda, A., Kitagawa, T., Sasai, Y., and Sasaki, H. 2007. Effect of El Niño on migration and larval transport of the Japanese eel (Anguilla japonica). – ICES Journal of Marine Science, 64: –. To clarify the effect of an El Niño on the migration of Japanese eels (Anguilla japonica) in the western North Pacific, differences in migration patterns of eel larvae (leptocephali) in El Niño and non-El Niño years were compared qualitatively through a numerical particle-tracking model. Depending on interannual meridional displacements of the salinity front and bifurcation of the North Equatorial Current, transport of Japanese eel larvae to the Kuroshio was much less than to the Mindanao Current in an El Niño year, and recruitment to coastal habitats in Japan decreased in those years. In non-El Niño years, transport to the Kuroshio was twice as high, and recruitment to coastal habitats increased. If the spawning area of eels was independent of El Niño, transport differences between the two currents were not clear. In the western North Pacific, mesoscale eddies also played a significant role in dispersing eel larvae and prolonging their migration. Consequently, the changing oceanic conditions associated with climate change have resulted in decreased recruitment of Japanese eels, and the eddy effect on migration of the Japanese eel larvae needs to be added into the North Equatorial Current–Kuroshio system.

scholarly journals Mindanao Current and Undercurrent: Thermohaline Structure and Transport from Repeat Glider Observations

2017 ◽  
Vol 47 (8) ◽  
pp. 2055-2075 ◽  
Author(s):  
Martha C. Schönau ◽  
Daniel L. Rudnick
Keyword(s):  
North Pacific Ocean ◽  
Maximum Velocity ◽  
Sea Surface Salinity ◽  
North Equatorial Current ◽  
Western Boundary ◽  
Thermocline Depth ◽  
Boundary Current ◽  
Surface Salinity ◽  
The North ◽  
Mindanao Current

AbstractAutonomous underwater Spray gliders made repeat transects of the Mindanao Current (MC), a low-latitude western boundary current in the western tropical North Pacific Ocean, from September 2009 to October 2013. In the thermocline (<26 kg m−3), the MC has a maximum velocity core of −0.95 m s−1, weakening with distance offshore until it intersects with the intermittent Mindanao Eddy (ME) at 129.25°E. In the subthermocline (>26 kg m−3), a persistent Mindanao Undercurrent (MUC), with a velocity core of 0.2 m s−1 and mean net transport, flows poleward. Mean transport and standard deviation integrated from the coast to 130°E is −19 ± 3.1 Sv (1 Sv ≡ 106 m3 s−1) in the thermocline and −3 ± 12 Sv in the subthermocline. Subthermocline transport has an inverse linear relationship with the Niño-3.4 index and is the primary influence of total transport variability. Interannual anomalies during El Niño are greater than the annual cycle for sea surface salinity and thermocline depth. Water masses transported by the MC/MUC are identified by subsurface salinity extrema and are on isopycnals that have increased finescale salinity variance (spice variance) from eddy stirring. The MC/MUC spice variance is smaller in the thermocline and greater in the subthermocline when compared to the North Equatorial Current and its undercurrents.

The change features of the west boundary bifurcation line of the North Equatorial Current in the Pacific

2015 ◽  
Vol 14 (6) ◽  
pp. 957-968 ◽  
Author(s):  
Junru Guo ◽  
Yulong Liu ◽  
Jun Song ◽  
Xianwen Bao ◽  
Yan Li ◽  
...  
Keyword(s):  
North Equatorial Current ◽  
The West ◽  
The North ◽  
Bifurcation Line ◽  
The Pacific ◽  
Equatorial Current
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