The nascent Kuroshio of Lamon Bay

Gordon, Arnold L.; Flament, Pierre; Villanoy, Cesar L.; Centurioni, Luca

doi:10.1002/2014jc009882

Cited by 66 publications

(77 citation statements)

References 31 publications

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“…The water mass within Lamon Bay (LMB) is a mixture of NEC and WPS waters; the ratio varies with the NEC bifurcation latitude. Our experiment site was located on a channel where South China Sea (SCS) water may intrude into the WPS, as observed and reported by Gordon et al (2014).…”

Section: Water Mass Propertiesmentioning

confidence: 97%

“…Originating as the northward branch of the bifurcation of the NEC, the Kuroshio also interacts with westward-propagating eddies carrying Western Philippine Sea (WPS) water. Gordon et al (2014) suggest that the Kuroshio east of Luzon Island consists primarily of NEC and WPS waters. The water mass within Lamon Bay (LMB) is a mixture of NEC and WPS waters; the ratio varies with the NEC bifurcation latitude.…”

Section: Water Mass Propertiesmentioning

confidence: 98%

“…Previous studies conclude that Kuroshio transport is inversely correlated with the bifurcation latitude of the NEC (Qiu and Lukas, 1996;J. Yang et al, 2013;Gordon et al, 2014) considering that the bifurcation moves northward in winter and during El Niño events (Kim et al, 2004;Qu and Lukas, 2003).…”

mentioning

confidence: 97%

“…Gordon et al (2014) report on surveys conducted during 2011 and 2012 in Lamon Bay, an embayment within the eastern margin of Luzon ( Figure 1). Using meridional velocities recorded by the shipboard acoustic Doppler current profiler (ADCP), they estimate the transport in the upper 600 m crossing 16°30'N and 18°20'N as 9-10 Sv in May 2011 and 14-17 Sv in May 2012, attributing the ~50% increase in 2012 to a southward shift in the NEC bifurcation location, which enriched the Kuroshio with NEC thermocline water while reducing the salinity minimum imprint of the North Pacific Intermediate Water (NPIW; Talley, 1993).…”

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confidence: 99%

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The Kuroshio and Luzon Undercurrent East of Luzon Island

Lien¹,

Ma²,

Lee³

et al. 2015

Oceanog

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Section: Water Mass Propertiesmentioning

confidence: 97%

Section: Water Mass Propertiesmentioning

confidence: 98%

mentioning

confidence: 97%

mentioning

confidence: 99%

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The Kuroshio and Luzon Undercurrent East of Luzon Island

Lien¹,

Ma²,

Lee³

et al. 2015

Oceanog

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“…This location is about 100 km south (upstream) of the Kuroshio's entrance into the East China Sea. In the "Luzon Array, " HPIESs were deployed in the western Philippine Basin northeast of Luzon, Philippines, from 2012 near the origin of the Kuroshio (Gordon et al, 2014).In addition to these measurements made with several iterations of inverted echo sounders, time series measurements across the Kuroshio have included arrays with acoustic Doppler current profilers (ADCPs), current meters, and tide gauges spanning the current (e.g., Kawabe, 1988;Johns et al, 2001;Lien et al, 2014;Y. Yang et al, 2015, in mean circulation with a swift ribbon-like Kuroshio along the western boundary from northeastern Luzon to southeastern Japan ( Figure 2c).…”

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confidence: 99%

Mean Structure and Variability of the Kuroshio from Northeastern Taiwan to Southwestern Japan

Andres¹,

Jan²,

Sanford³

et al. 2015

Oceanog

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Mean Structure and Variability of the Kuroshio from Northeastern Taiwan to Southwestern JapanABSTRACT. In the subtropical western North Pacific Ocean, the Kuroshio delivers heat, salt, and momentum poleward, much like its North Atlantic analog, the Gulf Stream. Though the Kuroshio generally flows along the western boundary from Taiwan to southeastern Japan as an "attached" current, the Kuroshio's strength, vertical structure, and horizontal position undergo significant temporal and spatial variability along this entire route. Ubiquitous mesoscale eddies and complicated topography associated with a string of marginal seas combine to make the western North Pacific a region with complex circulation. Here, we synthesize results from the recent US Origins of the Kuroshio and Mindanao Currents and Taiwan Observations of Kuroshio Transport Variability observational programs with previous findings to build a comprehensive picture of the Kuroshio on its route from northeastern Taiwan to southeastern Japan, where the current finally transitions from a western boundary current into the Kuroshio Extension, a vigorously meandering free jet. in the western North Pacific over the past decades, many of them supported by ONR, that have focused on different sections along the Kuroshio (Table 1). Here, we summarize some of these earlier field programs and synthesize them with OKMC/OKTV results to describe the downstream evolution of the Kuroshio along its route from the western Philippine Basin through the East China Sea to south of Japan (Figure 1a). MEASURING THE KUROSHIODue to the rich eddy field in the western North Pacific (Figure 2a), individual synoptic sections across the Kuroshio from shipboard measurements are often not representative of the current's mean state. Longer duration measurements (or many crossings) are needed to estimate the current's mean transport and velocity structure. Since 1991, arrays of inverted echo sounders (IESs) have been deployed at various sections across the Kuroshio (e.g., Table 1 and the green lines in Figure 3a) to measure variability at hourly resolution for durations of one year or more. In most cases, the IESs were also equipped with pressure sensors (PIESs) and additional current sensors (CPIESs) or horizontal electric field sensors (HPIESs) to help establish the Kuroshio's time-varying position, absolute geostrophic transport, and velocity structure (see Meinen et al., 2002;Donohue et al., 2010;and Szuts, 2012, for reviews of the methodologies and the title page photo [opposite] for an image of a PIES). One of these experiments was along the Affiliated Surveys of the Kuroshio off Cape Ashizuri (ASUKA) Line, which extends 1,000 km southeastward from Shikoku, Japan, into the Philippine Basin (Figure 3a). A full array of instruments was deployed there from 1993 to 1995 (Book et al., 2002) with a reduced two-IES array maintained through (Kakinoki et al., 2008. Two IES arrays were also deployed along the PN Line, a repeat hydrographic line in the East China Sea northwest of Okinawa (labele...

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Strengthening Kuroshio observed at its origin during November 2010 to October 2012

Chen

Qiu

et al. 2015

JGR Oceans

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SSH trend can be adequately reproduced by a 1.5 layer nonlinear reduced gravity model, suggesting an important role of upper ocean response to low-frequency wind forcing in the western Pacific. Salinity at 500 m depth is also found to increase during the concurrent 2 years. This subthermocline salinity increase is a combined outcome of vertical (basin-scale isopycnal surface movement) and horizontal advections (i.e., strengthened Kuroshio) due to changes in the large-scale wind-driven ocean circulation.

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The nascent Kuroshio of Lamon Bay

Abstract: A northward flowing current, emanating from the North Equatorial Current (NEC) bifurcation at

Cited by 66 publications

References 31 publications

The Kuroshio and Luzon Undercurrent East of Luzon Island

The Kuroshio and Luzon Undercurrent East of Luzon Island

Mean Structure and Variability of the Kuroshio from Northeastern Taiwan to Southwestern Japan

Strengthening Kuroshio observed at its origin during November 2010 to October 2012

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