South China Sea throughflow as evidenced by satellite images and numerical experiments

Yu, Zuojun; Shen, Suhung; McCreary, Julian P.; Yaremchuk, Max; Furue, Ryo

doi:10.1029/2006gl028103

Cited by 47 publications

(35 citation statements)

References 25 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The north branch of the North Equatorial Current (NEC) will enter the Indonesian Seas after flowing through the Luzon Strait into the SCS and flowing out of the SCS through the Karimata Strait [95]. The SCS branch of the Pacific-to-Indian Ocean throughflow in winter, is confirmed by drifter buoys [96] and numerical modeling results [24,97]. The net outflow from the SCS plays an important role in the net transport of the ITF, and 25% of the net heat transport from the Pacific Ocean to the Indian Ocean is through the SCSTF [98], and the role of the SCSTF has been confirmed by the subsurface salinity structure in the interior SCS [97,99].…”

Section: Implication Of the Scs Throughflow (Scstf)mentioning

confidence: 71%

See 1 more Smart Citation

Progress of regional oceanography study associated with western boundary current in the South China Sea

et al. 2013

View full text Add to dashboard Cite

Recent progress of physical oceanography in the South China Sea (SCS) associated with the western boundary current (WBC) and eddies is reviewed in this paper. It includes Argo observations of the WBC, eddy detection in the WBC based on satellite images, cross-continental shelf exchange in the WBC, eddy-current interaction, interannual variability of the WBC, air-sea interaction, the SCS throughflow (SCSTF), among others. The WBC in the SCS is strong, and its structure, variability and dynamic processes on seasonal and interannual time scales are yet to be fully understood. In this paper, we summarize progresses on the variability of the WBC, eddy-current interaction, air-sea interaction, and the SCSTF achieved in the past few years. Firstly, using the drifting buoy observations, we point out that the WBC becomes stronger and narrower after it reaches the central Vietnam coast. The possible mechanisms influencing the ocean circulation in the northern SCS are discussed, and the dynamic mechanisms that induce the countercurrent in the region of northern branch of WBC in winter are also studied quantitatively using momentum balance. The geostropic component of the WBC was diagnosed using the ship observation along 18°N, and we found that the WBC changed significantly on interannual time scale. Secondly, using the ship observations, two anti-cyclonic eddies in the winter of 2003/2004 in the northern SCS, and three anti-cyclonic eddies in the summer of 2007 along 18°N were studied. The results show that the two anti-cyclonic eddies can propagate southwestward along the continental shelf at the speed of first Rossby wave (~0.1 m s 1 ) in winter, and the interaction between the three anti-cyclonic eddies in summer and the WBC in the SCS is preliminarily revealed. Eddies on the continental shelf of northern SCS propagated southeastward with a maximum speed of 0.09 m s 1 , and those to the east of Vietnam coast had the largest kinetic energy, both of which imply strong interaction between eddy activity and WBC in the SCS. Thirdly, strong intraseasonal variability (ISV) of sea surface temperature (SST) near the WBC regions was found, and the ISV signal of SST in winter weakens the ISV signal of latent heat flux by 20%. Fourthly, the long-term change of SCSTF volume transport and its connection with the ocean circulation in the Pacific were discussed.South China Sea, western boundary current, eddy, eddy-current interaction, intraseasonal variability, South China Sea thoughflow Citation:Wang D X, Liu Q Y, Xie Q, et al. Progress of regional oceanography study associated with western boundary current in

show abstract

Section: Implication Of the Scs Throughflow (Scstf)mentioning

confidence: 71%

“…The SCSWBC is the focus of some studies through hydrological observations and altermeter data [7,[16][17][18][19][20], and can be reproduced by ocean models [21][22][23][24]. There are limitations in these studies, however, so the full picture of the SCSWBC is yet to be seen.…”

Section: Observationmentioning

confidence: 99%

Progress of regional oceanography study associated with western boundary current in the South China Sea

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Although the agreement that the Kuroshio mainly inflows into SCS at the Luzon Strait has been reached (Li and Wu , 1989;Liang et al, 2008), estimation of the mean LST into the SCS in different papers still have big differences, varying from 0.5 to 10 Sv (Wyrtki, 1961;Metzger and Hurlburt, 1996;Lebedev and Yaremchuk, 2000;Chu and Li, 2000;Xue et al, 2004;Yaremchuk and Qu, 2004;Song, 2006;Wang et al, 2006;Yu et al, 2007). The big differnces between these estimates may be caused by time-scale and precision of the observations, data processing methods, numerical model settings and other factors.…”

Section: Introductionmentioning

confidence: 92%

Sub-seasonal variability of Luzon Strait Transport in a high resolution global model

Zhao

Liu

2010

Acta Oceanol. Sin.

View full text Add to dashboard Cite

The Luzon Strait is the main impact pathway of the Kuroshio on the circulation in South China Sea (SCS). Based on the analysis of the 1997-2007 altimeter data and 2005-2006 output data from a high resolution global HYCOM model, the total Luzon Strait Transport (LST) has remarkable subseasonal oscillations with a typical period of 90 to 120 days, and an average value of 1.9 Sv into SCS. Further spectrum analysis shows that the temporal variability of the LST at different depth is remarkable different. In the upper layer (0-300 m), westward inflow has significant seasonal and subseasonal variability. In the bottom layer (below 1 200 m), eastward outflow exhibits remarkable seasonal variability, while subseasonal variability is also clear. In the intermediate layer, the westward inflow is slightly bigger than the eastward outflow, and both of them have obvious seasonal and subseasonal variability. Because the seasonal variation of westward inflow and eastward outflow is opposite, the total transport of intermediate layer exhibits significant 50-150 days variation, without obvious seasonal signals. The westward Rossby waves with a period of 90 to 120 days in the Western Pacific have very clear correlationship with the Luzon Strait Transport, this indicates that the interaction between these westward Rossby waves and Kuroshio might be the possible mechanism of the subseasonal variation of the LST.

show abstract

“…Tsimplis and Shaw (2008) suggested that local sea level rise is a combination of global sea level variability due to changes in water mass and density, as well as local and regional effects. It has been pointed out by several researchers (Qu et al, 2005, Rong et al, 2007, Yu et al, 2007 likely to be the cause for modulating the inter-annual sea level variability associated with ENSO. On the Sunda Shelf and particularly in SS, our earlier study (Tkalich et al, 2012) showed that wind over the SCS is arguably the most important factor, which determines the observed annual variability in sea level anomalies (SLAs).…”

Section: Introductionmentioning

confidence: 99%

Sea level trend and variability in the Singapore Strait

et al. 2013

View full text Add to dashboard Cite

Abstract. Sea level in the Singapore Strait (SS) exhibits response to various scale phenomena, from local to global. Longest tide gauge records in SS are analysed to derive local sea level trend and annual, inter-annual and multi-decadal sea level variability, which then are attributed to regional and global phenomena. Annual data gaps are reconstructed using functions correlating sea level variability with ENSO. At annual scale, sea level anomalies in SS are (quasi-periodic) monsoon-driven, of the order of ± 20 cm, the highest during northeast monsoon and the lowest during southwest monsoon. Interannual regional sea level drops are associated with El Niño events, while the rises are correlated with La Niña episodes; both variations are in the range of ± 5 cm. At multidecadal scale, annual measured sea levels in SS are varying with global mean sea level, rising at the rate 1.2-1.7 mm yr −1 for 1975-2009, 1.8-2.3 mm yr −1 for 1984-2009 and 1.9-4.6 mm yr −1 for 1993-2009. When SS rates are compared with the global trends (2.0, 2.4 and 2.8 mm yr −1 , respectively) derived from tide gauge measurements for the same periods, they are smaller in the earlier era and considerably larger in the recent one. Taking into account the first estimate of land subsidence rate, 1-1.5 mm yr −1 in Singapore, the recent trend of absolute sea level rise in SS follows regional tendency.

show abstract

South China Sea throughflow as evidenced by satellite images and numerical experiments

Cited by 47 publications

References 25 publications

Progress of regional oceanography study associated with western boundary current in the South China Sea

Progress of regional oceanography study associated with western boundary current in the South China Sea

Sub-seasonal variability of Luzon Strait Transport in a high resolution global model

Sea level trend and variability in the Singapore Strait

Contact Info

Product

Resources

About