Observations of Inflow of Philippine Sea Surface Water into the South China Sea through the Luzon Strait

Centurioni, Luca; Niiler, Pearn P.; Lee, Dong‐Kyu

doi:10.1175/1520-0485(2004)034<0113:ooiops>2.0.co;2

Cited by 206 publications

(183 citation statements)

References 16 publications

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“…During the northeast monsoon period, the Kuroshio curves more westward when flowing across the Luzon Strait than in the summer [Centurioni et al, 2004;Yuan et al, 2006;Chern et al, 2010]. Part of the Kuroshio intrusion water joins the cyclonic circulation in the northern South China Sea.…”

Section: 1002/2014jc010614supporting

confidence: 91%

Large variability of the Kuroshio at 23.75°N east of Taiwan

et al. 2015

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Synoptic features of the Kuroshio at 23.75 N were quantified using nine ship-based surveys between September 2012 and September 2014. The new ship-based data set provides an unprecedented view of the Kuroshio east of Taiwan and suggest tremendous variability in its velocity, hydrography, volume, heat, and salt transports, and water masses. The Kuroshio maximum velocity varied in 0.7-1.4 m s 21 ; the core current width, delineated with the limit v 0.2 m s 21 , ranged from 85 to 135 km, and the thickness varied from 400 to 600 m. A dual velocity maximum in the Kuroshio core current, though unexpected, was observed in three of nine cruises. The Kuroshio core transport, integrated from the directly measured velocity, varied between 10.46 and 22.92 Sv (1 Sv510 6 m 3 s 21 ). The corresponding heat transport referenced to 0 C was 0.838-1.793 3 10 15 W, and the salt transport was 345.0-775.9 3 10 6 kg s 21 . The geostrophic transport estimated using the thermal wind relation with the observed hydrographic data and reference velocity at 900 m is comparable to the directly measured Kuroshio transport during most of the surveys, suggesting the directly measured velocity is mostly in geostrophic balance.

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Section: 1002/2014jc010614supporting

confidence: 91%

Large variability of the Kuroshio at 23.75°N east of Taiwan

et al. 2015

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“…Many observed current vectors, which are larger than 0.8 m s À1 (red arrows), were located to the right of the path of the storm center under all TCs. [12] In order to display the 2-D current field at all TC intensity levels, these flow vectors were processed by the ensemble average method [Freeland, 1975;Centurioni and Niiler, 2003;Centurioni et al, 2004;Lee and Niiler, 2005]. Figure 3 shows the number of independent observations of SVP drifters and their standard error ellipses.…”

Section: Resultsmentioning

confidence: 99%

Observed near‐surface flows under all tropical cyclone intensity levels using drifters in the northwestern Pacific

et al. 2013

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[1] Data from drifters of the surface velocity program and tropical cyclones (TCs) of the Joint Typhoon Warning Center during 1985-2009 were analyzed to demonstrate strong currents under various storm intensities such as category-4 to À5, category-2 to À3, and tropical storm to category-1 TCs in the northwestern Pacific. Current speeds over 2.0 m s À1 are observed under major TCs with the strongest mean currents to the right of the storm track. This study provides the characterization of the near-surface velocity response to all recorded TCs, and agrees roughly with Geisler's theory (1970). Our observations also verify earlier modeling results of Price (1983).

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“…The nSCS is also strongly influenced by Kuroshio intrusion through the Luzon Strait (Farris and Wimbush, 1996). The intruded Kuroshio waters with higher temperature and salinity but lower nutrients are often transported westward via eddies and Ekman advection (Centurioni et al, 2004) influencing the large area of the nSCS on seasonal timescales.…”

Section: Site Description Field Sampling and Measurementsmentioning

confidence: 97%

“…Wind-driven coastal upwelling, river discharge and inter-shelf nutrient transport were important mechanisms supplying nutrients to the euphotic zone of the nSCS (Liu et al, 2002;Gan et al, 2010;Han et al, 2013), while their contributions to primary production were mostly limited to coastal regions as these nutrients would be mostly utilized in the coastal waters before reaching the large area of the nSCS. Kuroshio intrusion would dilute the nSCS waters with the low-nutrient North Pacific waters (Farris and Wimbush, 1996), which appeared to be much weaker during April-September (Centurioni et al, 2004). Contribution of nitrogen fixation to new production of the nSCS was generally negligible compared to the nitrate-based new production (Chen, 2005;Bombar et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton dynamics driven by vertical nutrient fluxes during the spring inter-monsoon period in the northeastern South China Sea

Dong

Wang

2016

Biogeosciences

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Abstract.A field survey from the coastal ocean zones to the offshore pelagic zones of the northeastern South China Sea (nSCS) was conducted during the inter-monsoon period of May 2014 when the region was characterized by prevailing low-nutrient conditions. Comprehensive field measurements were made for not only hydrographic and biogeochemical properties but also phytoplankton growth and microzooplankton grazing rates. We also performed estimations of the vertical turbulent diffusivity and diffusive nutrient fluxes using a Thorpe-scale method and the upwelling nutrient fluxes by Ekman pumping using satellite-derived wind stress curl. Our results indicated a positive correlation between the integrated phytoplankton chlorophyll a and vertical nutrient fluxes in the offshore region of the nSCS during the study period. We generally found an increasing role of turbulent diffusion but a decreasing role of curl-driven upwelling in vertical transport of nutrients from the coastal ocean zones to the offshore pelagic zones. Elevated nutrient fluxes near Dongsha Islands supported high new production leading to net growth of the phytoplankton community, whereas the low fluxes near the southwest of Taiwan had resulted in a negative net community growth leading to decline of a surface phytoplankton bloom. Overall, phytoplankton dynamics in the large part of the nSCS could be largely driven by vertical nutrient fluxes including turbulent diffusion and curl-driven upwelling during the spring inter-monsoon period.

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Observations of Inflow of Philippine Sea Surface Water into the South China Sea through the Luzon Strait

Cited by 206 publications

References 16 publications

Large variability of the Kuroshio at 23.75°N east of Taiwan

Large variability of the Kuroshio at 23.75°N east of Taiwan

Observed near‐surface flows under all tropical cyclone intensity levels using drifters in the northwestern Pacific

Phytoplankton dynamics driven by vertical nutrient fluxes during the spring inter-monsoon period in the northeastern South China Sea

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