Offshore Detachment Process of the Low-Salinity Water around Changjiang Bank in the East China Sea

Moon, Jae‐Hong; Hirose, Nobuyoshi; Yoon, Jong Hwan; Pang, Ig Chan

doi:10.1175/2010jpo4167.1

Cited by 73 publications

(87 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this period tides around the Changjiang Bank also have their largest tidal range (sea level amplitude is approximately 1.6 m) because of spring tides. These conditions for the CDW's detachment may support the interpretation of Moon et al (2010) for the detachment process around the Changjiang Bank. They suggested that the offshore detachment of CDW occurs in the sloping side of the Changjiang Bank where the tidal energy dissipation is strong enough to overcome the buoyancy effect during spring tide.…”

Section: Low-salinity Water Detached From Main Cdw Plumesupporting

confidence: 68%

“…11. This shows that both the intense tide-induced vertical mixing and winddriven cross-shelf transport largely contribute to the detachment process of the CDW (Moon et al 2010). …”

Section: Low-salinity Water Detached From Main Cdw Plumementioning

confidence: 86%

“…Chen and Beardsley (1995) suggested that when stratification is included, tidal currents become modified over the sloping sides of the bottom by nonlinear advection, the baroclinic pressure gradient, and vertical friction, and then tidal mixing occurs in the bottom boundary layer leading a horizontal tidal mixing front. Lee and Beardsley (1999) suggested that the bottom mixed layer thickness varies with the spring-neap cycle in the tidal current, and Moon et al (2010) showed that the water column over the Changjiang Bank could be well mixed during spring tide when tidal currents become stronger. In this study, we found that under strong along-shore (southeasterly) winds caused by the typhoons that cause a cross-shelf (northeastward) freshwater transport in the ECS, a large low-salinity water lens (~200 km) occurs due to intense vertical mixing during spring tide.…”

Section: Low-salinity Water Detached From Main Cdw Plumementioning

confidence: 99%

See 2 more Smart Citations

Modeling Offshore Freshwater Dispersal from the Changjiang River and Controlling Factors During Summer

Moon¹,

Hirose²,

Pang³

et al. 2012

Terr. Atmos. Ocean. Sci.

Self Cite

View full text Add to dashboard Cite

In this study we examine offshore transport and dispersal pathways of the freshwater discharge from the Changjiang River in the East China Sea (ECS), using a regional ECS model. Comparison between the results for 1996 and 1998 clearly shows that the summer monsoon winds play a significant role in spreading the freshwater discharge offshore and determining the dispersal of freshwater in the ECS. Analysis of 10-year simulation demonstrates that a northeastward freshwater transport to Jeju Island across the northwestern shelf of the ECS dominates during the summer period due to the surface Ekman flow by the southeasterly along-shore wind. Meanwhile, there is virtually no relationship between the amount of the summer discharge and the freshwater pathway toward Jeju Island. Our analysis also suggests that when the summer wind is relatively weak, another freshwater pathway toward the central ECS appears with the ambient along-shelf current between the Taiwan Strait and the Korea Strait.

show abstract

Section: Low-salinity Water Detached From Main Cdw Plumesupporting

confidence: 68%

“…11. This shows that both the intense tide-induced vertical mixing and winddriven cross-shelf transport largely contribute to the detachment process of the CDW (Moon et al 2010). …”

Section: Low-salinity Water Detached From Main Cdw Plumementioning

confidence: 86%

Section: Low-salinity Water Detached From Main Cdw Plumementioning

confidence: 99%

See 1 more Smart Citation

Modeling Offshore Freshwater Dispersal from the Changjiang River and Controlling Factors During Summer

Moon¹,

Hirose²,

Pang³

et al. 2012

Terr. Atmos. Ocean. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In summer (Fig. 5c), tidal currents shift the core of the plume slightly to the south of Changjiang mouth and therefore bring the model result closer to observations (e.g., Moon et al 2010). The northward intrusion into the Yellow Sea is much reduced.…”

Section: Changjiang Plume Dispersalsupporting

confidence: 61%

“…A few intermediate models Rong and Li 2012) examined interactions between Changjiang plumes and tides in the absence of mean circulation. Moving one step further, Moon et al (2010) and Wu et al (2011) included the mean shelf circulation in addition to river and tidal forcing, focusing on how tides induce the offshore detachment of Changjiang plume in summer. By including tides, the modeled summer intrusion of Changjiang plume into the Yellow Sea is much reduced, bringing the modeled plume dispersal closer to reality (Wu et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Tidal Effects on Circulation in and near the East China Sea

Lee¹,

Chao²,

Liu³

et al. 2014

Terr. Atmos. Ocean. Sci.

View full text Add to dashboard Cite

We incorporate tidal currents into a previously validated, three-dimensional, subtidal circulation model to assess tidal effects on the circulation in and around the East China Sea. Of particular interest is the tide-enhanced Changjiang plume dispersal and circulation in the southern East China Sea. The modeling results show that without tides, the Changjiang plume in summer presents itself as a stagnant, expansive pool in regions bordering the northern East China Sea and Yellow Sea, too far north and too accumulating relative to observations. The winter plume dispersal pushed by the north-northeast monsoon follows the China coastline southeastward as a coastal current that matches more closely with observations with or without tides. Incorporating the effect of tides brings the model closer to observation, especially in summer. During summer the Taiwan Warm Current shifts to lower latitudes, enhances upwelling off southeast China and induces a southward tidal residual coastal flow off southeast China. Tides also induce the observed seaward detachment of the summer plume. In winter, the prevailing north-northeast monsoon suppresses the Taiwan Warm Current to the minimum. However, if the winter monsoon is weakened for a few weeks, the Taiwan Warm Current reappears and these three mechanisms begin to operate as in summer. CTD surveys and satellite observations south of the Changjiang River estuary contribute to a better understanding of the tidal effects on regional ocean currents.

show abstract

Stable isotope ratios of carbon and nitrogen in suspended organic matter: Seasonal and spatial dynamics along the Changjiang (Yangtze River) transport pathway

Gao

Ishizaka

2014

J. Geophys. Res. Biogeosci.

View full text Add to dashboard Cite

Seven cruises were conducted in the Changjiang (Yangtze River) Estuary and the adjacent western East China Sea (ECS) from 2010 to 2012 to study the seasonal variations of δ 13 C and δ 15 N in suspended organic matter. In addition, two cruises in the northeastern ECS in July 2011 and in Tsushima Strait in July 2012 were conducted to evaluate the distribution patterns of these isotopes over the entire Changjiang transport pathway. In summer, the surface δ 13 C was lowest in the Changjiang Channel, increasing from land to sea, reaching highest values in the central ECS, and then decreasing and remaining relatively constant. In winter, the surface δ 13 C in the western ECS showed lower values with less variation in general. At most stations, δ 13 C increased from the sea surface to the seabed, reflecting the degradation of sinking organic matter; however, these trends could be changed in the summer by surface phytoplankton accumulation. Combining data from all the Changjiang Estuary and western ECS cruises revealed that when the suspended particulate matter (SPM) was > 135 mg/L, the δ 13 C values were fairly constant (À24.5‰ to À20.5‰); when the SPM was < 135 mg/L, the δ 13 C values showed much greater variability (À28.4‰ to À16.6‰). The surface δ 15 N also showed generally higher values in the central ECS in summer and lower values in winter. The seasonal variations of δ 13 C and δ 15 N were largely attributed to the SPM composition change, i.e., more phytoplankton cells in the summer whereas more resuspended sediment particles were present in winter.

show abstract

Offshore Detachment Process of the Low-Salinity Water around Changjiang Bank in the East China Sea

Cited by 73 publications

References 37 publications

Modeling Offshore Freshwater Dispersal from the Changjiang River and Controlling Factors During Summer

Modeling Offshore Freshwater Dispersal from the Changjiang River and Controlling Factors During Summer

Tidal Effects on Circulation in and near the East China Sea

Stable isotope ratios of carbon and nitrogen in suspended organic matter: Seasonal and spatial dynamics along the Changjiang (Yangtze River) transport pathway

Contact Info

Product

Resources

About