ENSO-induced interannual variability in the southeastern South China Sea

Liu, Qinyan; Feng, Ming; Wang, Dongxiao

doi:10.1007/s10872-011-0002-y

Cited by 83 publications

(61 citation statements)

References 21 publications

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“…In contrast, the SLA signals are weak in other years (e.g., 2008). These interannual variations are likely linked to the large scale dynamic processes in the Pacific, such as the ENSO (Liu et al 2011;Zhuang et al 2013). Although transformations of the SLA signals are clear in many cases (marked with yellow dashed lines in Fig.…”

Section: Transformation Of Intra-seasonal Sla Signalsmentioning

confidence: 99%

“…In fact, the low-frequency varying winds over the North Pacific tropical gyre dominate the interannual-to-decadal variations of the sea level and circulation around the Philippines Islands (e.g., Qiu and Chen 2010;Zhuang et al 2013). In addition, oceanic passages contribute to the synchronous variations of the eastern SCS and the western Pacific through wave motions (Liu et al 2011;Zhuang et al 2013). On the interannual time scales, for example, the ENSO signals can propagate into the eastern SCS via the low-latitude channels in the form of CTWs (Liu et al 2011).…”

mentioning

confidence: 99%

“…In addition, oceanic passages contribute to the synchronous variations of the eastern SCS and the western Pacific through wave motions (Liu et al 2011;Zhuang et al 2013). On the interannual time scales, for example, the ENSO signals can propagate into the eastern SCS via the low-latitude channels in the form of CTWs (Liu et al 2011).…”

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confidence: 99%

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Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago

et al. 2015

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Section: Transformation Of Intra-seasonal Sla Signalsmentioning

confidence: 99%

mentioning

confidence: 99%

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Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago

et al. 2015

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“…Based on the modeling results, significant variation of the upper layer circulation in the SCS associated with El Niño-Southern Oscillation (ENSO) is detected [Wu et al, 1998;Wang et al, 2006b;Liu et al, 2011]. By combining different observational data during 1993-2003, Fang et al [2006 assessed the intensification trend of the surface wind, SST, and sea surface height (SSH) which may reflect a signal of decadal variability due to the limitation of satellite observations.…”

Section: Introductionmentioning

confidence: 99%

Eddy energy sources and sinks in the South China Sea

Yang

Liu

et al. 2013

JGR Oceans

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[1] The eddy energy sources and sinks in the South China Sea (SCS) are studied based on a high-resolution ocean circulation model. Eddies are found to acquire their energy from barotropic instability (BT), the release of available potential energy (APE) associated with baroclinic instability (BC) and horizontal convergence from surrounding areas, while they lose energy due to turbulent processes. Both the eddy energy sources and sinks show western intensification with their maximum around the southwestern SCS where most of the wind-input energy occurs, and the Luzon Strait where the Kuroshio intrudes the SCS in winter. Unlike that in the open ocean, the eddy energy in the inner SCS is confined to the upper layer. Besides, the eddy energy indicates clear seasonal variability, especially at the Luzon Strait where the eddy activity is much stronger in winter than in summer. Energy budget analysis suggests that APE releasing is found to be the most important eddy energy source, accounting for over 60% of the total, followed by energy convergence from surrounding areas in horizontal direction (around 20%) and energy released from BT (around 15%). Most of the generated energy is mainly balanced by the turbulent processes, while both of the downward energy flux and tendency term are negligible.

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“…10), which means that the changes in the Kuroshio intensity may not be the most important factor that controls the LST. Recent studies showed that when the westward baroclinic Rossby waves in the tropical Pacific impinge on the eastern Philippines coast, they excite coastal Kelvin waves, which propagate through the Mindoro Strait into the eastern SCS, modulate the sea level south of the Luzon Strait, and thus influence the LST (e.g., Liu et al, 2011;Zhuang et al, 2013). This dynamic process may be important for the water exchange and high-salinity water intrusion through the LS.…”

Section: Impact Of the North Equatorial Current-kuroshio Circulatimentioning

confidence: 99%

Correlation between subsurface high-salinity water in the northern South China Sea and the North Equatorial Current–Kuroshio circulation system from HYCOM simulations

Wang

Zhuang

et al. 2015

Ocean Sci.

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Abstract. The North Pacific Tropical Water (NPTW), characterized by subsurface high salinity, is observed in the South China Sea (SCS) and is often used as an indicator of the water intrusion from the northwestern Pacific into the SCS. Based on the assimilation product from a global high-resolution Hybrid Coordinate Ocean Model (HYCOM) from 2008 through 2013, this study investigates the seasonal variability of subsurface high-salinity water (SHSW) in the northern SCS and its relationship with the North Equatorial Current-Kuroshio circulation system. Results show that the obvious seasonal variability of the SHSW appears at about 100-200 m in depth. It extends as far west as southeast of Hainan, reaching its volume maximum (minimum) in January (May). The seasonal variance contribution (seasonal variance accounting for the entire variance) is 0.38 in the period we considered, albeit with significant annual variance in other years. Further analysis shows that the changes in high-salinity water volume are highly correlated with the shift in the North Equatorial Current bifurcation latitude (NECBL), which reaches its northernmost point in December and its southernmost point in May. Due to the large-scale wind changes in the Pacific, the Luzon Strait transport (LST) weakens (strengthens) when the NECBL shifts to the south (north) during summer (winter), which results in the reduced (enhanced) SHSW intrusion from the northwestern Pacific into the northern SCS. It is also found that, on a seasonal timescale, the Kuroshio transport (KT) does not vary in phase with NECBL, LST and SHSW, indicating that the KT changes are probably not the governing factor for the seasonal variability of SHSW in the northern SCS.

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ENSO-induced interannual variability in the southeastern South China Sea

Cited by 83 publications

References 21 publications

Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago

Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago

Eddy energy sources and sinks in the South China Sea

Correlation between subsurface high-salinity water in the northern South China Sea and the North Equatorial Current–Kuroshio circulation system from HYCOM simulations

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