Kuroshio subsurface water feeds the wintertime Taiwan Warm Current on the inner East China Sea shelf

Journal of Geophysical Research Oceans, Journal Year: 2016, Volume and Issue: 121(7), P. 4790 - 4803

Published: June 15, 2016

Abstract The Taiwan Warm Current (TWC) has an overwhelming influence on the heat, salt, and nutrients balance one of broadest shelf in world, East China Sea shelf. In winter, TWC flows unusual upwind direction reaches Changjiang (Yangtze River) Estuary, but its origin pathway are intensely debated. Here combined evidences from current measurement, hydrographic, stable isotopic data all suggest that wintertime intrusion off Estuary mainly originates Kuroshio subsurface water northeast Taiwan, rather than Strait warm water. Kuroshio‐branched can intrude into inner near Zhe‐Min Coast via bottom layer, manifesting by a pronounced boundary at 50 m isobath around 28°N, thereby feeds Estuary. complicates hydrological process estuary sea, impact marine environment deserves more research attentions.

Language: Английский

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Controlling factors of summer phytoplankton community in the Changjiang (Yangtze River) Estuary and adjacent East China Sea shelf

Continental Shelf Research, Journal Year: 2015, Volume and Issue: 101, P. 71 - 84

Published: April 10, 2015

Language: Английский

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Investigation of hypoxia off the Changjiang Estuary using a coupled model of ROMS-CoSiNE

Progress In Oceanography, Journal Year: 2017, Volume and Issue: 159, P. 237 - 254

Published: Oct. 19, 2017

Language: Английский

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Progress on circulation dynamics in the East China Sea and southern Yellow Sea: Origination, pathways, and destinations of shelf currents

Progress In Oceanography, Journal Year: 2021, Volume and Issue: 193, P. 102553 - 102553

Published: March 19, 2021

In recent years, advances have been made toward understanding the oceanic circulation dynamics in Taiwan and Tsushima straits, as well over central shelf of East China Sea (ECS) southern Yellow Sea. ECS between 50 m 100 isobaths is attributed to confluences northeastward Strait Current (TSC) Kuroshio intrusion northeast Taiwan. Although relative importance interaction these two currents not documented, driving mechanisms underlying TSC extensively studied decades. The first set long-term (2009–2011) observations showed that a stronger/weaker (~2.37 Sv/~0.64 Sv) appears summer/winter. However, against northeasterly winds winter are still debatable. destination current formation Warm better understood. volume transport this ~2.67 Sv. northeastward-flowing has branches isobaths. northwestward (YSWC) characterizes circulations Trough winter, propagation coastally trapped waves greatly regulates flow pattern YSWC. Cold Water Mass alters summer.

Language: Английский

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Reconstructing the Preindustrial Coastal Carbon Cycle Through a Global Ocean Circulation Model: Was the Global Continental Shelf Already Both Autotrophic and a CO₂ Sink?

Global Biogeochemical Cycles, Journal Year: 2021, Volume and Issue: 35(2)

Published: Feb. 1, 2021

Abstract The contribution of continental shelves to the marine carbon cycle is still poorly understood. Their preindustrial state is, for one, essentially unknown, which strongly limits quantitative assessment their anthropogenic perturbation. To date, approaches developed investigate and quantify fluxes on have simplified physical biogeochemical features. In this study, we enhance global ocean biogeochemistry model HAMburg Ocean Carbon Cycle by explicitly representing riverine loads nutrients, as well improving representation organic matter dynamics in coastal ocean. Our simulations, at a resolution ∼0.4°, reveal globally averaged shelf water residence time (RT) 12–17 months, much shorter than RTs previously assumed benchmark studies (>4 years). This RT, induced primarily through outer regions with large oceanic inflows, promotes an efficient offshore transport terrestrial (0.44 PgCyr −1 ) dissolved inorganic sink from cycling (net ecosystem productivity [NEP] equal +0.20 ). turn, autotrophic contributes weak atmospheric CO 2 (0.04 ), dominated extensive inflows positive NEPs, such Patagonian shelf, East China Sea North Sea. contemporary uptake 0.15 furthermoresuggests that (0.11 less respect open

Language: Английский

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Circulations associated with cold pools in the Bohai Sea on the Chinese continental shelf

Continental Shelf Research, Journal Year: 2017, Volume and Issue: 137, P. 25 - 38

Published: Feb. 13, 2017

Language: Английский

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Provenance discrimination of sediments in the Zhejiang-Fujian mud belt, East China Sea: Implications for the development of the mud depocenter

Journal of Asian Earth Sciences, Journal Year: 2017, Volume and Issue: 151, P. 1 - 15

Published: Oct. 17, 2017

Language: Английский

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Coupling and Decoupling of High Biomass Phytoplankton Production and Hypoxia in a Highly Dynamic Coastal System: The Changjiang (Yangtze River) Estuary

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: May 28, 2020

The global increase in coastal hypoxia over the past decades has resulted from a considerable rise anthropogenically-derived nutrient loading. spatial relationship between surface phytoplankton production and subsurface hypoxic zones is often explained by considering oceanographic conditions associated with basin size, shape, or bathymetry, but this not case where nutrient-enriched estuarine waters merge into complex circulation systems. We investigated physical biogeochemical processes that create high-biomass blooms off Changjiang (Yangtze) Estuary East China Sea (ECS). Extensive situ datasets were linked coupled Regional Ocean Modelling Systems (ROMS) Carbon, Silicate Nitrogen Ecosystem (CoSiNE) model to explain connect disconnect of hypoxia. Diatoms major contributor carbon export, even though concentrations generally three times greater above zones, distributions during summer-fall period did closely align zones. A cause for decoupling was non-uniform offshore advection detachment segments water underlying river plume, which carried organic-rich northeast mouth. remineralization dissolved organic matter transit created patches spatially temporally independent nearshore high biomass blooms. absence offshore, 1–8 weeks time-lag inshore diatom hypoxia, made it otherwise difficult mechanistically observations. findings here highlight value developing integrated models aid forecasting dynamics under both contemporary future ocean conditions.

Language: Английский

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Mean Structure and Variability of the Kuroshio from Northeastern Taiwan to Southwestern Japan

Oceanography, Journal Year: 2015, Volume and Issue: 28(4), P. 84 - 95

Published: Dec. 1, 2015

In the subtropical western North Pacific Ocean, Kuroshio delivers heat, salt, and momentum poleward, much like its Atlantic analog, Gulf Stream.Though generally flows along boundary from Taiwan to southeastern Japan as an "attached" current, Kuroshio's strength, vertical structure, horizontal position undergo significant temporal spatial variability this entire route.Ubiquitous mesoscale eddies complicated topography associated with a string of marginal seas combine make region complex circulation.Here, we synthesize results recent US Origins Mindanao Currents Observations Transport Variability observational programs previous findings build comprehensive picture on route northeastern Japan, where current finally transitions into Extension, vigorously meandering free jet.

Language: Английский

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Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China

Journal of Geophysical Research Oceans, Journal Year: 2020, Volume and Issue: 125(5)

Published: April 4, 2020

Abstract Water export rate of shelf seas is a pivotal factor impacting the global carbon cycle. Tides have important impacts on hydrodynamics but are excluded in many climate models. To assess effect tides rates water, this study used regional hydrodynamic model and water residence time (WRT) adjoint examined runs with without for eastern China. The results show that average WRTs Bohai, Yellow, East China were 11.60, 4.95, 0.39 years, respectively. When excluded, decreased by >70% Bohai Yellow ~10% Sea, indicating significant acceleration due to absence tides. tidal has spatial variability associated depth. Sensitivity experiments suggest mean WRT was stronger than other dynamical factors (winds, rivers, boundary currents). In tides, weakened wind‐driven coastal current intensifying bottom resistance thus slowed inner middle portions shelf, compared Parameterization friction could significantly improve result. This highlights crucial role long‐term transport significance parameterizing

Language: Английский

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