Rossby Waves and Eddies Observed at a Temperature Mooring in Northern South China Sea

Lin, Yu‐Chun; Oey, Lie Yauw; Wang, J.; Liu, K.-K.

doi:10.1175/jpo-d-15-0094.1

Cited by 18 publications

(20 citation statements)

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“…These six periodic eddies are highly correlated with the local wind stress curl, with influences from oceanic processes including the Kuroshio intrusion and the SCS outflow via the Luzon Strait or the Mindoro Strait. Specifically, the LCE is forced by the wind stress curl (Lin et al, ) associated with wintertime orographic wind jets (Wang et al, ). It weakens in El Niño winters and intensifies in La Niña winters due to variation of the local wind stress curl (He et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…The tracking results show it is the LCE which propagates westward along the northern slope (see its trajectory in Figure a). By studying the subsurface thermocline movements from a mooring at 18.3°N, 115.5°E, Lin et al () concluded the propagating eddies past Dongsha area originate mainly from the east, either from Luzon or from southwestern Taiwan. Trajectories of the LCE and LWE shown in Figures a and z verify this assessment.…”

Section: Resultsmentioning

confidence: 99%

“…Specifically, the LCE is forced by the wind stress curl (Lin et al, 2016) associated with wintertime orographic wind jets (Wang et al, 2008). It weakens in El Niño winters and intensifies in La Niña winters due to variation of the local wind stress curl .…”

Section: Journal Of Geophysical Research: Oceansmentioning

confidence: 99%

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Periodic Mesoscale Eddies in the South China Sea

Chu

Chen

2020

JGR Oceans

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Although numerous mesoscale eddies are observed in the South China Sea (SCS), a comprehensive study that focuses on periodic eddies has not yet been reported. Periodic eddies are a type of eddies that occur nearly annually in fixed time frames with similar patterns and trajectories. On the basis of in situ and satellite observations, this paper reports a periodic anticyclonic eddy in the western SCS (the Western SCS Anticyclonic Eddy, WAE) and elucidates the underlying processes responsible for its generation and evolution. The WAE is a seasonal phenomenon modulated by the Asian monsoon and basin-scale circulation. Usually, the WAE generates around 112°E, 14°N in February-March, induced by the cyclonic gyre in the northern SCS associated with the winter monsoon. The WAE occupies the western SCS for 5 months and finally dissipates in July due to the reversal of the monsoon and thus the circulation transition. The WAE shows important interannual variations associated with large-scale climate variation, and the Niño-3.4 index could be a potential predictor for its interannual variation. Finally, we summarize 13 periodic eddies in the SCS, including those unreported by previous studies. The period eddies in the SCS exhibit an inverse "L" shape vortex train structure along the western boundary and around the 17°N section, with an anticyclonic "phase" in summer and a cyclonic "phase" in winter. This study provides new knowledge for periodic eddies in the SCS and will benefit targeted observations of periodic eddies.Plain Language Summary Some mesoscale eddies in the ocean are observed to occur nearly annually, we here call them periodic eddies. Due to high occurrence rates, those periodic eddies have profound impacts on local physics, fishery, biology, and air-sea interaction. This study first reports a periodic anticyclonic eddy in the western South China Sea from in situ and satellite observations. By eddy reoccurrence rate, we then summarized all periodic eddies in the SCS. These eddies form the mean state of the mesoscale eddy field in the SCS. This study provides new knowledge for periodic eddies in the SCS and it also carries implications for future studies of periodic eddies in other regions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Periodic Mesoscale Eddies in the South China Sea

Chu

Chen

2020

JGR Oceans

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“…The islands contribute greatly to eddy development (Evans et al, ), propagation (Schultz Tokos et al, ; Waterman, ), and dissipation (Cheney & Richardson, ; Mcwilliams & Flierl, ). Using singular value decomposition analysis of the covariability between temperature from moorings and satellite altimetry data, Lin et al () identified two types of mesoscale eddy pattern, one travelling westward from the Luzon Strait and the other travelling southwestward from southwestern Taiwan. Theoretical studies suggest that anticyclonic eddies are shed from Kuroshio intrusions into the SCS that take the form of an anticyclonic loop (Li et al, ).…”

Section: Introductionmentioning

confidence: 99%

Eddy‐Induced Transport of Saline Kuroshio Water Into the Northern South China Sea

Yang

Wang

et al. 2019

JGR Oceans

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To better understand eddy-induced heat and salt transport, a targeted joint hydrographic investigation focusing on an anticyclonic eddy was carried out in July 2017 in the northern South China Sea. In situ and satellite observations together with Hybrid Coordinate Ocean Model (HYCOM) output show the transport of subsurface saline Kuroshio water into the northern South China Sea by an anticyclonic eddy. Subsurface high-salinity cores are consistent with the anticyclonic eddy centers. The transport of saline Kuroshio water occurs in two stages accompanied by eddy shedding. First, saline Kuroshio water is trapped within the anticyclonic eddy at its generation location. Then, although the salinity within the eddy gradually weakens as the eddy carries the saline water westward, the quantity of saline water (>34.70 psu) shows a sharp increase, dominated by eddy-induced salinity advection. A diagnosis of the salinity budget further confirms that the contribution of eddy flow advection is greater than that of mean flow advection. The saline Kuroshio water is trapped and conveyed in this anticyclonic eddy, providing vital evidence and important implications for eddy-induced salt transport and water exchange.

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“…Due to the Sea's low latitude and relatively narrow width, the Rossby wave response time is short. The western boundary current varies seasonally, it is driven by wind stress curl as well as inflow from the Luzon Strait (Xu and Oey 2015;Lin et al 2016), and modulated by rich interannual and interdecadal variability due to, e.g., the El Niño-Southern Oscillation and the Philippines-Taiwan Oscillation (Chang and Oey 2012). Quan et al (2016) propose that the South China Sea western boundary current (SCSWBC) should be defined as the current that flows southwestward and southward along the northern and western slopes of the SCS, while the flow along the Sea's southwestern shelf is considered as part of the locally wind-driven shelf circulation.…”

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confidence: 99%

Editorial—the 7th International Workshop on Modeling the Ocean (IWMO 2015)

et al. 2017

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IWMO 2015 was held in the pristine campus of the Australian National University, Canberra, Australia, from June 1-5, 2015. Despite the negative Coriolis spin that many of us from the northern half of the globe experienced for the first time, we were positively impressed by the vastness and beauty of Australia and the kindness and friendliness of its people. Late fall in Canberra displayed spectacular starry nights and brisk sunny days. The workshop was attended by more than 80 participants from 16 countries around the globe. Seventy papers including both oral and posters were presented, covering a very broad range of topics on observations and models: climate variability, basin circulation and coastal oceanography, air-sea interaction, sea-ice dynamics, sediment transport, tropical cyclones, biogeochemical-physical coupling, boundary currents, sea level rise, extreme events, ocean prediction, and others. As in the past years, many of the participants were students and young scientists-all presented very high-quality research, and three were selected to receive the Outstanding Young Scientist Awards (OYSA). In order that some of us may have a chance to also receive some recognition for our hard work, new this year were three Best Presentation Prizes (BPP), given to any presenters deemed qualified by the audience to receive the honors. Also, new this year were special lunch-time sessions when young and more senior scientists exchanged ideas on a wide range topics.The 10 papers in this Topical Collection were selected from a total of 20 originally submitted papers after they underwent the usual process of reviews and revisions. There were at least 2 reviewers for each paper. The reviews were solicited from both the workshop attendees and the scientific community at large.

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Rossby Waves and Eddies Observed at a Temperature Mooring in Northern South China Sea

Cited by 18 publications

References 58 publications

Periodic Mesoscale Eddies in the South China Sea

Periodic Mesoscale Eddies in the South China Sea

Eddy‐Induced Transport of Saline Kuroshio Water Into the Northern South China Sea

Editorial—the 7th International Workshop on Modeling the Ocean (IWMO 2015)

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