Simulation of mesoscale circulation in the Tatar Strait of the Japan Sea

Пономарев, В. И.; Fayman, Pavel A.; Prants, S. V.; Budyansky, M. V.; Uleysky, M. Yu.

doi:10.1016/j.ocemod.2018.04.006

Cited by 14 publications

(3 citation statements)

References 26 publications

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“…The PAM survey in this study, as well as the cases of the Zhejiang‐Fujian Coastal Current (Wu et al, ) and currents across the Taiwan Strait (Liu et al, ), has proven to be an effective and practical approach to obtain the subtidal cross‐sectional current profiles. It can conceivably be applied to straits (e.g., the Denmark Strait, the Gibraltar Strait, the Otranto Strait, and the Tatar Strait) where spatial variations of currents are pronounced (Astraldi et al, ; Ferentinos & Kastanos, ; Ponomarev et al, ; Ypma et al, ). Limited and scattered moorings or bottom‐mounted instruments are insufficient to illustrate the distribution of inflow and outflow through these straits.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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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“…Here (𝜑(𝑡 1 ), 𝜆(𝑡 1 )) and (𝜑(𝑡 2 ), 𝜆(𝑡 2 )) are initial and final positions of the particle, 𝜑′(𝑡) and 𝜆′(𝑡) are time derivatives, R=6371 km is the Earth's radius. The values of L in km are represented by gradation of grey color on the path or L-maps [24]. These maps are parameterized by the starting date and the integration period T. Each L-map contains information about the length of the paths travelled by a large number of virtual particles for T=30 days prior to the date indicated on a L-map.…”

Section: Lagrangian Methodsmentioning

confidence: 99%

Evolution and Structure of a Mesoscale Anticyclonic Eddy in the Northwestern Japan Sea and Its Exchange with Surrounding Waters: In Situ Observations and Lagrangian Analysis

Budyansky,

Ladychenko,

Lobanov

et al. 2023

Preprint

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We have found a region in the northwestern Japan Sea near the Subpolar Front where mesoscale eddies regularly form and circulate. The anticyclonic eddy with a strong dynamic feature, vertically extended to the bottom (~3500 m), multilayer core structure and extreme values of temperature and salinity was sampled there in the cruise in May 2004. The altimetry-based eddy tracking showed that it had a life span of nine months with the size reaching 120 km. CTD observational data were used to explore the eddy’s features and vertical structure. The eddy had a multilayer core with different thermohaline characteristics which could be originated by eddy interaction with the surrounding waters during its life. The evolution of the eddy has been studied and analyzed with the help of altimetry-based Lagrangian indicators of water motion. Performing the particle-tracking numerical experiments, we computed the Lagrangian maps that contain information on the origin of water inside the eddy core and its ‘age’ on every day of the eddy’s life. Inspecting daily-computed Lagrangian maps, we documented the essential events in the evolution of the eddy including its formation, splitting, merger, entrainment and detrainment of water, erosion and eventual decay. All these observations have been verified with the infrared satellite images. The new Lagrangian technique has been applied to calculate day by day the content of water of various origin (coastal, subtropical and subarctic) entrained into the eddy core. It has been found that the surface core has been filled mainly with subtropical water originated in the southern flank of the Subpolar Front. The episodes with cardinal changes of ratio of different water types have been recorded and verified with the infrared satellite images and maps of the origin of water inside the eddy core.

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“…Tatar Strait is relatively shallow when compared to the Japan Sea as a whole so the potential for significant change is even greater. Annual fluctuations in circulation appear to be intimately associated with the rate at which the Amur River discharges into the Okhotsk Sea across from the northernmost part of Sakhalin Island, and then spills over into Tatar Strait, thus influencing the northward migration of the Tsushima Current, and impacting both the thermohaline structure and circulation of water in the strait (Andreev, 2018;Ponomarev et al, 2018). As the Amur River is one of the largest rivers in East Asia, it has been hypothesized that increased water usage by humans as it courses through Mongolia, China, and Russia might lead to unintended changes in the thermohaline structure of Tatar Strait (Shevchenko et al, 2011).…”

Section: Potential For Climatic Fluctuations To Produce Significant T...mentioning

confidence: 99%

Ocean Dynamics and Methane Plume Activity in Tatar Strait, Far Eastern Federal District, Russia as Revealed by Seawater Chemistry, Hydroacoustics, and Noble Gas Isotopes

et al. 2022

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This investigation presents methane, noble gas isotopes, CTD, and stable isotopic data for water samples collected in Niskin bottles at Tatar Strait during the spring seasons of 2015 and 2019 onboard the Russian R/V Akademik M.A. Lavrentyev. The results are compared to previous research carried out in 1999 in a nearby portion of the Strait and demonstrate that salinity and temperature can change appreciably. The CTD data from 1999 shows warm surface waters underlain by cold subsurface waters. In contrast, the 2015 data show the CTD data that show warm temperatures and high salinity extending down from the surface well into intermediate waters, while the 2019 data show cold surface waters underlain by even colder subsurface waters. CTD data collected above active gas plume sites along Sakhalin Island’s western shore show no substantial difference in temperature or salinity from the non-plume sites, and the methane concentrations at all of the measured sites are significantly above saturation, even in the shallow waters. Hydroacoustic data also suggest the presence of free gas and gas hydrate–coated methane bubbles from the seafloor at least to the base of upper intermediate waters. All of the intermediate and deep Japan Sea Proper waters in Tatar Strait still retain tritiogenic 3He, similar to that observed throughout much of the Japan Sea, indicating limited vertical exchange between these layers and surface waters. An analysis of the δ13C of dissolved inorganic carbon in the seawater shows that positive values are limited to surface waters and that the waters become progressively more depleted in 13C with depth. The results are consistent with research over the past several decades which has shown that ventilation of intermediate and deep Japan Sea Proper water is somewhat limited, while both the temperature and salinity of surface and subsurface water layers within the strait are sensitive to the balance between cold, less saline waters contributed by the Amur River/Primorye Current from the north and warm, saline waters contributed by the Tsushima Current from the south.

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Simulation of mesoscale circulation in the Tatar Strait of the Japan Sea

Cited by 14 publications

References 26 publications

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

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

Evolution and Structure of a Mesoscale Anticyclonic Eddy in the Northwestern Japan Sea and Its Exchange with Surrounding Waters: In Situ Observations and Lagrangian Analysis

Ocean Dynamics and Methane Plume Activity in Tatar Strait, Far Eastern Federal District, Russia as Revealed by Seawater Chemistry, Hydroacoustics, and Noble Gas Isotopes

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