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Lie, Heung‐Jae; Cho, Cheol-Ho; Lee, Jae-Hak; Lee, Suk; Tang, Yuxiang

doi:10.1023/a:1011139313988

Cited by 88 publications

(21 citation statements)

References 9 publications

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“…However, the model-predicted northward flows in summer are inconsistent with the observed flows. In general, the northward flow along the YS trough found in previous studies is revealed in winter [Lie et al, 2000;Teague and Jacobs, 2000].…”

Section: Circulations In the Yssupporting

confidence: 66%

“…The northward flow enters the Jeju Strait by turning clockwise, and thus the eastward flow through the Jeju Strait becomes stronger than in winter. This clockwise-turning flow is named the Cheju Warm Current by Lie et al [2000]. In the lower layer (at 50 m depth), the current flows northwestward from the ECS along the 50 m isobath and then turns clockwise west of Jeju Island (Figure 4b).…”

Section: Circulations In the Ysmentioning

confidence: 99%

“…The YSWC has long been believed to exist regardless of season [Uda, 1934]. However, recent hydrographic surveys and satellite-tracked drifters have not provided any direct evidence for the continuous northward current in summer [Lie, 1986;Park, 1986;Beardsley et al, 1992;Lie et al, 2000]. The YSWC is thus not considered a permanent current, but a sporadic event in winter when strong northerly wind is dominant over the YS [Hsueh, 1988;Pang et al, 1992;Riedlinger and Jacobs, 2000;Teague and Jacobs, 2000].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of wind and tidal contributions to seasonal circulation of the Yellow Sea

2009

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[1] Seasonal circulation of the Yellow Sea (YS) in response to wind and tidal forces is examined using a three-dimensional numerical model. Wind forcing affects the wintertime circulation of the YS; on the other hand, the summer southerly monsoon is weak and therefore has little impact on the circulation, on the basis of comparative experiments with and without wind conditions. Results indicate that the Yellow Sea Warm Current (YSWC) along the YS trough exists regardless of wind forcing. However, strong winter northerly winds intensify the southward coastal flows along both coasts of the YS, and therefore, the northward intrusion of the YSWC becomes stronger. These flows in the YS are substantially weakened when wind forcing is not applied to the model. In addition to wind-driven circulation, tide-induced circulation is also dominant in the YS, particularly in summer. In winter, the tidal effect weakens the upwind and downwind flows in response to the strong northerly winds, while in summer, tidal forcing induces a strong southward residual flow along the western slope and a cyclonic gyre with a bottom cold water dome at the central region of the YS. The southward residual current possibly explains the southward movement of the Yellow Sea Bottom Cold Water as observed in summer. Comparison to the effects of parameterized tidal mixing suggests that residual flow driven by explicit tidal forcing plays an important role in the summertime circulation of the YS.

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Section: Circulations In the Yssupporting

confidence: 66%

Section: Circulations In the Ysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of wind and tidal contributions to seasonal circulation of the Yellow Sea

2009

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“…In fact, historically, the YSWC was considered either as an upstream branch of the TSWC [Nitani, 1972;Guan, 1994;Guan and Chen, 1964] or as an extension of the perennially northward flowing TWC [Beardsley et al, 1985]. However, the intrusion of the warm water along the YST is a winter-only feature [Lie, 1986;Park, 1986;Beardsley et al, 1992;Lie et al, 2000;Guo et al, 2000;Teague and Jacobs, 2000], while the transport of both the TWC and the TSWC peak in the summer. Thus, in some studies the YSWC has been considered as a locally winddriven flow or even as a sporadic response to strong northerly wind bursts [Hsueh et al, 1986;Hsueh, 1988].…”

Section: Introductionmentioning

confidence: 99%

An asymmetric upwind flow, Yellow Sea Warm Current: 1. New observations in the western Yellow Sea

et al. 2011

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[1] The winter water mass along the Yellow Sea Trough (YST), especially on the western side of the trough, is considerably warmer and saltier than the ambient shelf water mass. This observed tongue-shape hydrographic feature implies the existence of a winter along-trough and onshore current, often referred to as the Yellow Sea Warm Current (YSWC). However, the YSWC has not been confirmed by direct current measurements and therefore skepticism remains regarding its existence. Some studies suggest that the presence of the warm water could be due to frontal instability, eddies, or synoptic scale wind bursts. It is noted that in situ observations used in most previous studies were from the central and eastern sides of the YST even though it is known that the warm water core is more pronounced along the western side. Data from the western side have been scarce. Here we present a set of newly available Chinese observations, including some from a coordinated effort involving three Chinese vessels in the western YST during the 2006-2007 winter. The data show unambiguously the existence of the warm current on the western side of YST. Both the current and hydrography observations indicate a dominant barotropic structure of YSWC. The westward deviation of YSWC axis is particularly obvious to the south of 35°N and is clearly associated with an onshore movement of warm water. To the north of 35°N, the YSWC flows along the bathymetry with slightly downslope movement. We conclude that the barotropic current is mainly responsible for the warm water intrusion, while the Ekman and baroclinic currents play an important but secondary role. These observations help fill an observational gap and establish a more complete view of the YSWC.

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“…The distribution and variability of the warm water along the YST have been studied by many investigators since then. The warm water intrusion along the YST is a winter-only feature [Lie, 1986;Park, 1986;Lie et al, 2000]. So the YSWC has been considered in some studies as a sporadic event in winter when the strong northwesterly monsoon prevails over the Yellow Sea [Hsueh et al, 1986;Hsueh, 1988].…”

Section: Introductionmentioning

confidence: 99%

An asymmetric upwind flow, Yellow Sea Warm Current: 2. Arrested topographic waves in response to the northwesterly wind

Lin¹,

Yang²

2011

J. Geophys. Res.

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[1] A warm and salty water mass exists along the Yellow Sea Trough (YST) in winter. This oceanic water mass is distinct from the ambient shelf water and is distributed on the western side of the YST. It has long been reasoned that a Yellow Sea Warm Current (YSWC) must exist. A recent observational study indeed supports the existence of the YSWC and shows that its position moved progressively westward as the warm water intrudes further shoreward toward the northwest. In this paper, we explain mechanisms for sustaining the YSWC and for its westward displacement. The northwesterly monsoonal wind prevails in the winter and is directed against the YSWC. The crosstrough scale is small compared with the spatial scale of monsoonal variation, so one can assume, to the first order, that the wind stress is uniform across the trough. The curl of depth-averaged wind stress has opposite signs on the two sides of the trough. Consequently, two oppositely rotating gyres develop initially and they converge along the trough giving rise to a barotropic upwind flow. But this upwind flow lasts only for a few days as the two gyres evolve and propagate as topographic waves. For a northerly wind, both gyres move westward since the positive (negative) potential vorticity flux on the western (eastern) side of the trough pushes the water toward shore (trough). If the bottom friction is negligible, the steady response becomes a large anticyclonic gyre over the trough and the upwind current is squeezed toward the shore line. In this case, no YSWC is sustained along or near the trough. This runaway warm current can be arrested by a moderate bottom friction. We therefore propose that the YSWC is actually arrested topographic waves in response to local wind stress forcing.Citation: Lin, X., and J. Yang (2011), An asymmetric upwind flow, Yellow Sea Warm Current: 2. Arrested topographic waves in response to the northwesterly wind,

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Cited by 88 publications

References 9 publications

Comparison of wind and tidal contributions to seasonal circulation of the Yellow Sea

Comparison of wind and tidal contributions to seasonal circulation of the Yellow Sea

An asymmetric upwind flow, Yellow Sea Warm Current: 1. New observations in the western Yellow Sea

An asymmetric upwind flow, Yellow Sea Warm Current: 2. Arrested topographic waves in response to the northwesterly wind

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