Observational and model studies of synoptic current fluctuations in the Bohai Strait on the Chinese continental shelf

Ding, Yang; Bao, Xianwen; Yao, Zhigang; Bi, Congcong; Wan, Kai; Bao, Min; Jiang, Zhipeng; Song, Jun Yeob; Jia, Gao

doi:10.1007/s10236-019-01247-5

Cited by 29 publications

(26 citation statements)

References 27 publications

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“…The unstructured‐grid Finite Volume Community Ocean Model (FVCOM; C. Chen et al, 2003) is used. The model mesh and configuration used in the study are the same as those in Ding et al (2018) and Ding et al (2019), which investigated coastally trapped waves and ocean current fluctuations under storms in the ECSs. In this study, the model is named as FVCOM‐ECSs.…”

Section: Methodsmentioning

confidence: 99%

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Drivers of Marine Heatwaves in the East China Sea and the South Yellow Sea in Three Consecutive Summers During 2016–2018

et al. 2020

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In 3 consecutive years from 2016 to 2018, extreme ocean warming events, or marine heatwaves (MHWs), occurred during boreal summers in the East China Sea (ECS) and South Yellow Sea (SYS), which is unprecedented in the past four decades based on the satellite record. In this study, we used a high‐resolution hydrodynamic model based on Finite Volume Community Ocean Model (FVCOM) to simulate the evolution of these warming events. An upper ocean temperature budget (0–20 m) analysis based on the model results shows that the shortwave radiation and the ocean advection anomalies jointly contributed to the anomalous warming in the three successive summers (June–August) in the SYS and the north part of the ECS. In addition, the reduction of surface wind speeds during the 2016 and 2017 summers further weakened the vertical mixing, thereby enhancing the anomalous warming in the north part of the ECS adjacent to the SYS. During the three summers, the increases of shortwave radiation were closely related to the East Asian Summer Monsoon (EASM) variability, which reduced the cloud cover in the ECS and SYS, whereas the advection anomalies were mostly associated with regional wind anomalies. In summer 2018, upper ocean heat was transported into the central trough of the SYS, accumulated in an anticyclonic eddy generated by the anomalous wind stress curls. Therefore, despite the primary driver of the MHWs is the EASM variation, regional processes are critical to driving the spatial pattern of the MHW intensity in the ECS and SYS.

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Section: Methodsmentioning

confidence: 99%

“…The FVCOM-ECSs has been extensively validated in terms of barotropic tides, subtidal sea levels and currents, temperature, salinity, and surface waves (Ding et al, 2011(Ding et al, , 2018(Ding et al, , 2019G. D. Gao et al, 2018).…”

Section: Model Validationmentioning

confidence: 99%

Drivers of Marine Heatwaves in the East China Sea and the South Yellow Sea in Three Consecutive Summers During 2016–2018

et al. 2020

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“…Currents across the Bohai Strait are rather complicated and very sensitive to synoptic events, such as the gale bursts (Ding et al, 2019) and wind relaxations (this study). Therefore, to some extent, simply averaged winds used as surface forcing data in previous models might slur some critical processes and enlarge the errors in the long-term estimation.…”

Section: Implications For Estimating Long-term Sediment Flux Through mentioning

confidence: 97%

Novel, Repeated Surveys Reveal New Insights on Sediment Flux Through a Narrow Strait, Bohai, China

Wang

et al. 2019

JGR Oceans

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Straits are both a choke point and passage through which material and energy are exchanged between two adjoining water bodies. Understanding the mechanisms that drive these exchanges therefore is vital to quantifying the water and sediment budgets in regional and global oceans. Here we present a study in which a novel, phase‐averaging method was employed to better estimate the net‐suspended sediment fluxes through the entire Bohai Strait, the only passage for the massive Yellow River‐delivered sediment to leave the enclosed Bohai Sea for the open Yellow Sea. In winter, the transport through the strait was nearly barotropic in waters well mixed by the energetic winter monsoons. The transport became primarily baroclinic (opposite directions between upper and lower layers) in spring due to stratification, especially in the southern part of the strait. Intermittent but frequent southerly winds in northerly dominated winters were responsible for a net westward sediment transport into the Bohai Sea, a finding contrary to a status quo view. Hence, previous studies in which these intermittent southerly wind busts were not included are believed to have overestimated the sediments export from the Bohai Sea.

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“…The changed spatial distribution of the SSH formed a northward pressure gradient field. Meanwhile, the relatively high SSH was distributed along the northern Shandong Peninsula, along with strong NSCC enhanced by geostrophic balance [32,33]. Correspondingly, the BHS was characterized by the strong outflow (i.e., from BH to NYS).…”

Section: Changes In Bhs Circulations Due To the Synoptic Eventsmentioning

confidence: 99%

“…Previous studies mostly focused on the monthly or seasonal variation of the circulation using observations or numerical models [28,29]. However, recent studies showed that certain synoptic events, such as winter storms or summer typhoons, can significantly modulate the circulation system and sediment transport patterns (e.g., [30][31][32][33]). Due to lack of enough temporal (long, continuous time-series) and spatial (synchronized measurements at multiple locations) coverage of field data, how synoptic events such as the strengthening and weakening of winter storm winds alter the sediment transport patterns in the BHS is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Periodic Oscillation of Sediment Transport Influenced by Winter Synoptic Events, Bohai Strait, China

Duan

et al. 2020

Water

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Instruments on two bottom-mount platforms deployed in the Bohai Strait during a cruise from January 6–13, 2018 recorded an intense northerly wind event. The responses of hydrodynamic and hydrographical characteristics in Bohai Sea and Yellow Sea to the wind event were analyzed aided by the wind, wave, sea surface suspended sediment concentration and sea surface height datasets from open sources. It is shown that the strong wind event had a significant impact on the redistribution of sea surface height, regional wave conditions, regional circulations and the accompanying sediment transport pattern. Specifically, the sediment transport through the Bohai Strait may be divided into two chronological phases related to the wind event: (1) the enhanced sediment transport phase during the buildup and peak of the wind event when both the Northern Shandong Coastal Current and regional suspended sediment concentration were sharply increased; and (2) the relaxation phase when the northerly wind subsided or even reversed, accompanied by the enhanced Yellow Sea Warm Current with lowered suspended sediment concentration. Such results at synoptic scale would improve our capability of quantifying sediment exchange between the Bohai and Yellow sea, through the Bohai Strait and provide valuable reference for the study of other similar environments worldwide.

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Observational and model studies of synoptic current fluctuations in the Bohai Strait on the Chinese continental shelf

Cited by 29 publications

References 27 publications

Drivers of Marine Heatwaves in the East China Sea and the South Yellow Sea in Three Consecutive Summers During 2016–2018

Drivers of Marine Heatwaves in the East China Sea and the South Yellow Sea in Three Consecutive Summers During 2016–2018

Novel, Repeated Surveys Reveal New Insights on Sediment Flux Through a Narrow Strait, Bohai, China

Periodic Oscillation of Sediment Transport Influenced by Winter Synoptic Events, Bohai Strait, China

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