Upper-ocean currents around Taiwan

Liang, Wei-Li; Tang, Tie-Qiao; Yang, Yiing Jang; Ko, Meng-Chu; Chuang, Wen‐Ssn

doi:10.1016/s0967-0645(03)00011-0

Cited by 263 publications

(199 citation statements)

References 15 publications

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“…The model-derived velocity structure exhibited two segments: one was the southward CCC, which was confined in a narrow zone hugging the west coast of the TWS; the other was the northward flowing Taiwan Strait Warm Current located in the rest of the TWS. Such a pattern was consistent with previous results from in situ observations, supporting the validity of our numerical model (Fu et al, 1991;Liang et al, 2003;Chen et al, 2010).…”

Section: Model Verification and Model Resultssupporting

confidence: 93%

Inter-shelf nutrient transport from the East China Sea as a major nutrient source supporting winter primary production on the northeast South China Sea shelf

et al. 2013

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Abstract. The East China Sea (ECS) and the South China Sea (SCS) are two major marginal seas of the North Pacific with distinct seasonal variations of primary productivity. Based upon field observations covering both the ECS and the northern SCS (NSCS) during December 2008-January 2009, we examined southward long-range transport of nutrients from the ECS to the northeastern SCS (NESCS) carried by the China Coastal Current (CCC) driven by the prevailing northeast monsoon in wintertime. These escaped nutrients from the ECS shelf, where primary production (PP) was limited in winter, might however refuel the PP on the NESCS shelf at lower latitude, where the water temperature remained favorable, but river-sourced nutrients were limited. By combining the field observation of nitrate+nitrite (NO 3 +NO 2 , DIN) with our best estimate of volume transport of the CCC, we derived a first-order estimate for DIN flux of 1430 ± 1024 mol s −1 . Under the assumption that DIN was the limiting nutrient, such southward DIN transport would have stimulated 8.84 ± 6.33 × 10 11 gC of new production (NP), accounting for 33-74 % of the NP or 14-22 % of PP in winter on the NESCS shelf shallower than 100 m.

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Section: Model Verification and Model Resultssupporting

confidence: 93%

Inter-shelf nutrient transport from the East China Sea as a major nutrient source supporting winter primary production on the northeast South China Sea shelf

et al. 2013

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“…They suspected that the eddy was formed by the convergence of the northward Kuroshio intrusion and southward coastal flow. Later, Liang et al (2003) and Wu et al (2005) confirmed the existence of the anticyclonic circulation pattern southwest of Taiwan through Acoustic Doppler Current Profilers data. Wu et al (2005) also showed intraseasonal variation of the circulation structure as it sometimes could be cyclonic, and they suggested it was likely triggered by the variation of strong wind stress curl.…”

Section: Introductionmentioning

confidence: 68%

Evolution of an anticyclonic eddy southwest of Taiwan

Wang

et al. 2013

Ocean Dynamics

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Satellite images of sea-surface temperature, surface chlorophyll a concentration, and sea-level anomaly, together with ocean reanalysis data of Asia and Indian-Pacific Ocean (AIPOcean1.0), are utilized to study the three-dimensional characteristics and evolution of an anticyclonic warm eddy adjacent to the southwest coast of Taiwan during October and November 2006. Originated from the Kuroshio intrusion in the Luzon Strait, but unlike previously found westward moving anticyclonic eddies (AE) in the northeastern South China Sea, this AE was so close to the Taiwan coast and stayed where it was formed for over 1 month until it dissipated. Energy analysis is utilized to study the evolution process of the AE, and it shows that the barotropic instability (BTI) and baroclinic instability introduced by the Kuroshio intrusion flow appear to be the main energy sources for the AE. Periodical enhancement/relaxation of local northeasterly monsoon and its associated negative wind stress curl modify the current patterns in this region, reinforce the intraseasonal variability of the Kuroshio intrusion flow, and act together with Kuroshio to form the AE. Eddies detected from AIPOcean1.0 data also show that AEs are most likely to be generated southwest of Taiwan during the transition period of summer monsoon to winter monsoon, and generally, the BTI of Kuroshio intrusion contributes more than the direct wind stress work to the increase of the eddy kinetic energy for the generation and growth of the AEs.

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“…Based on the climatology reported in Liang et al [2003] and Rudnick et al [2011], we selected the KTV1 transect from 121.72 to 123 E (Figure 1) for the repeated shipboard measurements, which is wide enough to capture the Kuroshio. Table 1 lists the durations of the nine ship surveys which are indicated by Surveys 1-9 hereafter.…”

Section: Observationsmentioning

confidence: 99%

“…The dominant wind pattern off eastern Taiwan is the winter northeast monsoon from October to February and the summer southwest monsoon in May through August [Liang et al, 2003]. The mean speed of winter monsoon is approximately 10 m s 21 and is normally stronger than that of the summer monsoon.…”

Section: Observationsmentioning

confidence: 99%

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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Upper-ocean currents around Taiwan

Cited by 263 publications

References 15 publications

Inter-shelf nutrient transport from the East China Sea as a major nutrient source supporting winter primary production on the northeast South China Sea shelf

Inter-shelf nutrient transport from the East China Sea as a major nutrient source supporting winter primary production on the northeast South China Sea shelf

Evolution of an anticyclonic eddy southwest of Taiwan

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

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