A model study of Luzon cold eddies in the northern South China Sea

He, Yinghui; Cai, Shuqun; Wang, Dongxiao; He, Jianling

doi:10.1016/j.dsr.2014.12.007

Cited by 29 publications

(14 citation statements)

References 22 publications

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“…This structure becomes more remarkable in December–January (Figures d and g). The maximum CE probability (Figures a, d, and g) west of the Luzon Island is over 60%, which corresponds to the LCE reported in previous studies [e.g., Qu , ; He et al ., ]. The maximum AE probabilities southwest of the Luzon Island and CE west of the Mindoro Island are over 60% and 50% (Figure g), respectively, which corresponds to the eddy dipole observed in the lee of the Luzon and Mindoro islands [ Pullen et al .…”

Section: Resultsmentioning

confidence: 96%

“…The model setup is identical with He et al . []. Based on the 105 years spin‐up state, experiment 1 (Exp.…”

Section: Resultsmentioning

confidence: 99%

“…One of the main eddy generation sites in the SCS is located west of the Luzon and Mindoro Islands [ Wang et al ., ]. A well‐known seasonal cold eddy, the Luzon cold eddy (LCE), is located to the west of the Luzon Island, [ Shaw et al ., ; Qu , ; Hwang and Chen , ; Wang and Gan , ], which is mainly generated by the winter positive wind stress curl (WSC) [ Metzger , ; Yang and Liu , ; He et al ., ]. Wang et al .…”

Section: Introductionmentioning

confidence: 99%

“…One of the main eddy generation sites in the SCS is located west of the Luzon and Mindoro Islands [Wang et al, 2003]. A well-known seasonal cold eddy, the Luzon cold eddy (LCE), is located to the west of the Luzon Island, [Shaw et al, 1996;Qu, 2000;Hwang and Chen, 2000;Wang and Gan, 2014], which is mainly generated by the winter positive wind stress curl (WSC) [Metzger, 2003;Yang and Liu, 2003;He et al, 2015]. Wang et al [2008] further note that the orographic wind jets associated with the northeast winter monsoon and the gaps in the mountainous island chain along the eastern boundary of the SCS are responsible for eddy generation west of the Luzon Island.…”

Section: Introductionmentioning

confidence: 99%

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Interannual variability of winter eddy patterns in the eastern South China Sea

Xie

Cai

2016

Geophysical Research Letters

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Merged altimetry data collected over 21 years are analyzed to study the interannual variability of winter eddy activities in the eastern South China Sea (SCS) associated with the El Niño–Southern Oscillation. Composite analyses of eddy probability reveal that a Luzon cold eddy (LCE) northwest of the Luzon Island, an anticyclonic eddy northwest of the Mindoro Island (referred as MAE) and a cyclonic eddy west of the Mindoro Island (referred as MCE) are common for winter. Further studies indicate that LCE and MAE weaken and MCE strengthens in El Niño winters, whereas data show the opposite behavior for La Niña winters. In addition, the geographical pattern of MAE and MCE in an El Niño winter is different from that in a La Niña winter. The interannual wind curl anomalies west of the Luzon and Mindoro Islands and the outflow from the SCS via the Mindoro Strait may be responsible for the interannual eddy variability.

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Section: Resultsmentioning

confidence: 96%

“…The model setup is identical with He et al . []. Based on the 105 years spin‐up state, experiment 1 (Exp.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interannual variability of winter eddy patterns in the eastern South China Sea

Xie

Cai

2016

Geophysical Research Letters

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“…The mean ULT is ~120 m and becomes thicker toward the east. There are two eddy-like thinner ULT areas at 18°N, 118°E and 14°N, 111°E, corresponding to the cold eddy northwest of the Luzon Island [13,29] and the cold eddy off the Vietnamese coast [27,30], respectively. Figure 5b shows that the distribution of  in the South China Sea.…”

Section: Parameter Determinationmentioning

confidence: 99%

Evaluation of Satellite-Altimetry-Derived Pycnocline Depth Products in the South China Sea

Chen

et al. 2017

Remote Sensing

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Abstract:The climatological monthly gridded World Ocean Atlas 2013 temperature and salinity data and satellite altimeter sea level anomaly data are used to build two altimeter-derived high-resolution real-time upper layer thickness products based on a highly simplified two-layer ocean model of the South China Sea. One product uses the proportional relationship between the sea level anomaly and upper layer thickness anomaly. The other one adds a modified component (η M ) to account for the barotropic and thermodynamic processes that are neglected in the former product. The upper layer thickness, in this work, represents the depth of the main pycnocline, which is defined as the thickness from the sea surface to the 25 kg/m 3 isopycnal depth. The mean upper layer thickness in the semi-closed South China Sea is~120 m and the mean reduced gravity is~0.073 m/s 2 , which is about one order of magnitude larger than the value obtained in the open deep ocean. The long-term temperature observations from three moored buoys, the conductivity-temperature-depth profiles from three joint cruises, and the Argo measurements from 2006 to 2015 are used to compare and evaluate these two upper layer thickness products. It shows that adding the η M component is necessary to simulate the upper layer thickness in some situations, especially in summer and fall in the northern South China Sea.

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Seasonal–interannual–decadal variations of sea level in the South China Sea and connections with the tropical–subtropical Pacific

Tan

Sun

et al. 2023

Intl Journal of Climatology

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Different timescale contributions to the sea‐level variation in the South China Sea (SCS) are evaluated in this paper. On seasonal timescale, the large variance of the sea‐level anomaly (SLA) could account for more than 70% of the monthly sea‐level variation in the western shallow continental shelf and the area of Luzon cold eddy. Besides, the seasonal explained variance percentage (skill) has 2 weak centres (50%–70%) off eastern Vietnam, which is related to the summertime eddy pair in the SCS. On interannual‐to‐decadal (low‐frequency) timescale, the skill has two large‐value regions (Zone A and Zone B). Zone A is characterized by double centres off eastern Vietnam, but the meridional position of the double centres is farther north than that of the eddy pair. The skill in Zone A is in the range of 35%–55%, and about 50%–70% of the low‐frequency variation comes from the steric effect. Zone B is off the west coast of the Philippines. The skill in Zone B increases southward, and it is dominated by the wind‐induced dynamic process which is attributed to the remote Rossby wave from the tropical Pacific. Based on the S‐EOF analysis, the SEOF‐1 mode mainly portrays the decadal variation of the SLA, while the SEOF‐2 mode reflects the interannual variation of the SLA. In Zone B, almost all of the low‐frequency variation could be attributed to ENSO and PDO, especially to PDO which has a larger contribution. However, the double centres in Zone A are governed by the SCS summer monsoon, instead of ENSO and PDO.

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A model study of Luzon cold eddies in the northern South China Sea

Cited by 29 publications

References 22 publications

Interannual variability of winter eddy patterns in the eastern South China Sea

Interannual variability of winter eddy patterns in the eastern South China Sea

Evaluation of Satellite-Altimetry-Derived Pycnocline Depth Products in the South China Sea

Seasonal–interannual–decadal variations of sea level in the South China Sea and connections with the tropical–subtropical Pacific

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