Effect of the Yellow Sea warm current fronts on the westward shift of the Yellow Sea warm tongue in winter

Wang, Fan; Liu, Chuanyu; Meng, Qingjia

doi:10.1016/j.csr.2012.06.005

Cited by 42 publications

(24 citation statements)

References 20 publications

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“…The marine water is dominated by the flow of the YS Warm Current (YSWC). The YSWC, as one of the main components of YS circulation, is the only flow transporting warm salt water toward the YS and Bohai Sea in winter (Wang, Liu, and Meng 2012). The climate of International Journal of Remote Sensing 4423…”

Section: Introductionmentioning

confidence: 99%

The regional impacts of climate change on coastal environments and the aquaculture of Japanese scallops in northeast Asia: case studies from Dalian, China, and Funka Bay, Japan

Liu

Saitoh

Igarashi

et al. 2014

International Journal of Remote Sensing

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Climate changes affect coastal environments and aquaculture, threatening food security and economic growth. Japanese scallop (Mizuhopecten yessoensis) culture is economically important for the coastal communities of Dalian, China, and Funka Bay, Japan. In this study, we combined satellite remote-sensing data, in situ observations, and a suitable aquaculture site selection model to explore the interactions between marine environments and climate variability over a recent 10-year period (2003-2012). Our selection of appropriate zones in these two Far Eastern regions and our analyses of climatic event (Arctic Oscillation (AO), winter East Asian monsoon (EAM), and El Niño/La Niña Southern Oscillation (ENSO)) and meteorological (precipitation, temperature, and wind) data allowed us to determine the impacts of climate change on regional coastal environments and prospects for scallop aquaculture. These analyses showed that AO and EAM strongly influenced the aquaculture areas on the Dalian coast through their effects on temperature during winter. We also determined that wind was the main driving force behind regional environmental changes during spring. Conversely, ocean conditions and suitable areas in Funka Bay changed rapidly relative to oceanic and atmospheric circulation. In Funka Bay, areas appropriate for scallop aquaculture and variations in chlorophyll-a concentration (which reflect the availability of algal food for scallops) were strongly correlated with ENSO, precipitation, and air temperature. These correlations demonstrate the influence of oceanic and atmospheric parameters on the productivity of scallop aquaculture in Funka Bay. Adaptation to oceanic and atmospheric changes should be considered when developing plans and management strategies for coastal scallop aquaculture in northeast Asia.

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Section: Introductionmentioning

confidence: 99%

The regional impacts of climate change on coastal environments and the aquaculture of Japanese scallops in northeast Asia: case studies from Dalian, China, and Funka Bay, Japan

Liu

Saitoh

Igarashi

et al. 2014

International Journal of Remote Sensing

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“…However, the frontal structure and circulation are still poorly understood, mainly because of limited hydrographic and current measurements in the frontal zone. Climatological charts of temperature and salinity and sea surface temperature deduced from satellite imagery indicate clearly the persistence of the front during the winter monsoon [ Zheng and Klemas , ; Lie , ; Chen and Editorial Board , ; Ichikawa and Beardsley , ; Park and Chu , ; Huang et al ., ; Wang et al ., ]. The density front around the warm tongue is not so distinct as the temperature and salinity fronts, because in the frontal zone the temperature contribution to density is compensated by the salinity contribution [ Lie , ].…”

Section: Introductionmentioning

confidence: 99%

Frontal circulation and westward transversal current at the Yellow Sea entrance in winter

2013

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[1] During the wintertime monsoon, a tongue-shaped thermohaline front is established at the Yellow Sea (YS) entrance where the Cheju Warm Current (CWC) water, originating in the Kuroshio, and the YS cold water meet. The frontal circulation as well as the frontal structure has been investigated by analyzing comprehensive conductivity-temperaturedensity data, float tracks, current data, and wind data. The front develops by the westward advance of the CWC water, but it is bounded by the shallow Changjiang Banks (CB) that acts like a stopper in the deep part of the YS entrance. The northern part of the tongueshaped front displays a wave-like motion of 20 km in amplitude and 80 km in wavelength and isotherms, isohalines, and isopycnals are declined downward toward the north. The geostrophic current field indicates formation of a cyclonic circulation along the front which consists of a westward transversal current (TC) along 34 N and a southeastward outflow along the 50 m isobath of the CB. The westward trajectories of floats along the northern front support existence of the TC and a superposition of float tracks evidences cyclonic frontal circulation. The new observational findings of the TC and the cyclonic circulation do not match the classical paradigm of a northerly wind-driven circulation which consists of the northward inflow through the central trough and the southward outflow on the coastal sides. The cyclonic turning of the cold water around the warm tongue stands in contrast with the anticyclonic rounding of the warm CWC water around Jeju-do.

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“…1b,c). The historical data for 15 standard depths (surface, 10,20,30,50,75,100,125,150,200,250, 300, 350, 400, and 500 m) of the unevenly distributed stations are archived, where 4-49 and 1-42 vertical profiles of temperature and salinity at each station are available for February and April (mostly north of 32.5°N), respectively. In addition to the in-situ observations, daily and monthly mean gridded data with 0.25° horizontal resolution of satellite altimetry-derived SSH and satellite microwave-based SST from the Copernicus Marine Environment Monitoring Service (CMEMS) were used (http://marine.copernicus.eu/services-portfolio/access-to-products).…”

Section: Methodsmentioning

confidence: 99%

“…In the winter of 2002-2003, the structure of episodic large temperature inversion at the entrance of the Yellow Sea along 34°N was reported to be associated with the northward advection of the CWC water and the westward advection of the Korean Coastal Water [17][18][19] . Wang et al revealed the physical connection between the westward shift of the warm-tongue and the northern front, wherein the westward shift of the warm-tongue is strengthened when the northern front migrates more southward or grows stronger 20 . Based on in-situ hydrographic data, Lie et al disclosed the frontal circulation of the warm-tongue wherein the geostrophic current pattern indicates a cyclonic circulation along the front and the northern front of the warm-tongue shows a wave-like shape during the winter monsoon 14 .…”

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confidence: 99%

Observations of the warm-tongue circulation in the northern East China Sea

Lee

Nam

et al. 2020

Sci Rep

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A subsurface thermohaline front semi-permanently formed in association with near-bottom cyclonic circulation in the northern east china Sea was newly found from detailed hydrographic data collected during two cruises in February 2017 (winter) and April 2018 (spring) along with supplementary satellite remote sensing and historical hydrographic data. An alternate intruding frontal structure in water properties was observed across the cyclonic circulation in both seasons as formed by two contrasting water masses-low-temperature and low-salinity (i.e., low spiciness) water transported by the East China Sea Current and high-temperature and high-salinity (i.e., high spiciness) water transported by the Tsushima Warm Current. Consistent structures were confirmed from current observations during the two cruises, historical hydrographic observations, and satellite altimetry-derived sea surface height and surface frontal structure, indicative of retroflection of the Cheju Warm Current as deemed by the seasonal development of thermal stratification in spring. Our results reveal significant heat and material exchanges between the open Pacific and the broad shelf, particularly via diapycnal mixing and cross-front transports associated with across-front flow and cyclonic circulation, in the northern East China Sea. Understanding the structure of the thermohaline front and associated circulation in the northern East China Sea is of great importance because the northern East China Sea is located in the middle of heat and material exchange between the open Pacific and the neighbouring marginal seas such as the Yellow Sea, East China Sea, and coastal waters around Korea 1-3. The formation and dissipation of the thermohaline front in the northern East China Sea are very closely linked with the variation of the seasonal currents 2. The currents and circulation of the northern East China Sea are driven and modified by four factors: the Kuroshio main stream, northeast Asian Monsoon, tides, and the buoyancy formed by surface solar heating and freshwater discharge 4. Among these factors, the northeast Asian Monsoon has the prominent effect on the currents and circulation of the northern East China Sea 4,5. The northeast Asian Monsoon is dominated by northerly winds in winter and southerly winds in summer 1. During the winter monsoon, the Korea Coastal Current (KCC) and the China Coastal Current (CCC) transport relatively low-temperature and low-salinity waters southward along the west coast of Korea and the east coast of China, respectively 4. In contrast, the Yellow Sea Warm Current (YSWC) intermittently transports high-temperature and high-salinity water of Tsushima Warm Water (TWW) origin northward toward the west trough of the Yellow Sea when the northerly wind bursts 6,7. The YSWC branches from the Tsushima Warm Current (TWC) to the west of Cheju Island. The divergence formed by the southward wind-driven CCC and the northward YSWC drives the CCC to move in the southeast direction, creating an offshore East China Sea Current (ECSC) 8...

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Effect of the Yellow Sea warm current fronts on the westward shift of the Yellow Sea warm tongue in winter

Cited by 42 publications

References 20 publications

The regional impacts of climate change on coastal environments and the aquaculture of Japanese scallops in northeast Asia: case studies from Dalian, China, and Funka Bay, Japan

The regional impacts of climate change on coastal environments and the aquaculture of Japanese scallops in northeast Asia: case studies from Dalian, China, and Funka Bay, Japan

Frontal circulation and westward transversal current at the Yellow Sea entrance in winter

Observations of the warm-tongue circulation in the northern East China Sea

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