Annual variation of sea surface height, dynamic topography and circulation in the South China Sea

Li, Li; Xu, Jing; Jing, Chunsheng; Wu, Risheng; Guo, Xiaogang

doi:10.1360/03yd9012

Cited by 39 publications

(40 citation statements)

References 9 publications

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“…In 1961, Wyrtki [1] pointed out for the first time that there is a western intensification in the SCS. Using satellite altimeter data, Li et al [7] noted in 1999 that the SCSWBC is mainly part of the SCS circulation, and that the strongest flow is always located in the southeast coast of the Sino-Indian Peninsula, which is southward in winter and northward in summer and whose velocity can reach 1 m s 1 . Wang et al [12] described the relationship between the dynamic field and the thermal field of the upper-ocean circulation in the SCS in terms of seasonal cycle, and indicated that the intensity of the SCSWBC is related to the monsoons in the SCS.…”

Section: Structure and Variability Of The Scswbcmentioning

confidence: 99%

“…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%

“…Before 2006, the oceanographic research of the SCS is mostly based on early observations and analyses; after that, quantitative numerical calculations and simulations of the SCS circulation became more common [5,6]. As new observations increase, particularly the ocean remote sensing data widely used in recent years [7], studies of vertical structure, transport and variability of the SCS circulation become possible. However, the observations and research of the SCS WBC (SCSWBC) have only just started, which consists of the SCS Warm Current (SCSWC) [8] and the Vietnam Coastal Current (VCC) [9,10].…”

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

et al. 2013

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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

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Section: Structure and Variability Of The Scswbcmentioning

confidence: 99%

Section: Observationmentioning

confidence: 99%

mentioning

confidence: 99%

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

et al. 2013

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“…In recent years, satellite altimeter data have been extensively employed to describe the circulation in the SCS due to the trait of large coverage, long time series and good resolution. Using TOPEX/Poseidon (T/P) data, previous studies [3][4][5] described the average monthly circulation structure in the SCS and analyzed mesoscale circulation such as the Luzon cold eddy, and the western SCS summer offshore current. Based on a composite of sea surface height anomalies data from several satellites, some studies [6,7] presented the mesoscale eddy spatial distribution in the SCS.…”

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confidence: 99%

Variability of surface circulation in the South China Sea from satellite altimeter data

Guo

Fang

et al. 2006

CHINESE SCI BULL

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11-year satellite altimeter sea surface height (SSH) anomaly data from January 1993 to December 2003 are used to present the dominant spatial patterns and temporal variations of the South China Sea (SCS) surface circulation through Empirical Orthogonal Function (EOF) analysis. The first three EOF modes show the obvious seasonal variations of SSH in the SCS. EOF mode one is generally characterized by a basin-wide circulation. Mode two describes the double-cell basin scale circulation structure. The two cells were located off west of the Luzon Island and southeast of Vietnam, respectively. EOF mode three presents the mesoscale eddy structure in the western SCS, which develops into a strong cyclonic eddy rapidly from July to September. EOF mode one and mode three are also embedded with interannual signals, indicating that the SCS surface circulation variation is influenced by El Niño events prominently. The strong El Niño of 1997/98 obviously changed the SCS circulation structure. This study also shows that there existed a series of mesoscale eddies in the western SCS, and their temporal variation indicates intra-seasonal and interannual signals.

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“…One branch continues to fl ow southward towards the Java Sea through the Karimata Strait. The other turns eastward and forms a cyclonic gyre Shaw et al, 1999;Hu et al, 2000;Li et al, 2000;Fang et al, 2005;Liu et al, 2008b;Fang et al, 2012). In summer, SCSwbc structure is very complex, it starts from the Karimata Strait and fl ows northward in June.…”

Section: Introductionmentioning

confidence: 99%

Reversal process of the South China Sea western boundary current in autumn 2011

Zhang

Guo

2015

Chin. J. Ocean. Limnol.

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Annual variation of sea surface height, dynamic topography and circulation in the South China Sea

Cited by 39 publications

References 9 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

Variability of surface circulation in the South China Sea from satellite altimeter data

Reversal process of the South China Sea western boundary current in autumn 2011

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