Coastal upwelling by wind-driven forcing in Jervis Bay, New South Wales: A numerical study for 2011

Sun, Youn-Jong; Jalón‐Rojas, Isabel; Wang, Xiaohua; Jiang, Donghui

doi:10.1016/j.ecss.2017.11.022

Cited by 16 publications

(8 citation statements)

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“…Residence time is one of the most frequently used timescales to reflect the water-exchange capacity of a bay. Eulerian definition of residence time is applied in this paper, which has been widely used in numerous shallow coastal areas such as the Archachon Bay (Plus et al, 2009), Bay of Biscay (Grifoll et al, 2013), Jervis Bay (Sun et al, 2018), and Jiaozhou Bay (Yuan et al, 2021). A Eulerian passive tracer with a concentration of 1 was released at each grid cell inside the JZB on 1st February (time t 0 ).…”

Section: Residence Time Calculationmentioning

confidence: 99%

“…The waterexchange capacity of Venice Lagoon in Italy decreased due to land reclamation, dredging, and mobile-barrier construction (Ferrarin et al, 2013). Many researchers have paid attention to the environment change of different bays due to human intervention (Plus et al, 2009;Patgaonkar et al, 2012;Grifoll et al, 2013;Zarzuelo et al, 2015;Sun et al, 2018). Understanding the longterm evolution of water environment in human-impacted bays may require specific modeling of individual bays (Zhu et al, 2015;Jia et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Response of Water Environment to Land Reclamation in Jiaozhou Bay, China Over the Last 150 Years

Zhou

et al. 2021

Front. Mar. Sci.

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Jiaozhou Bay (JZB), located at Qingdao City, north China, is a semi-enclosed shallow bay that has undergone large-scale land reclamation and is suffering from a deteriorated water environment. Long-term evolution of JZB with respect of coastline, tidal prism, tidal dynamics, water-exchange capacity, and pollutant transport from 1863 to 2020 was investigated in this paper, using remote sensing images, historical charts, and a numerical model. The JZB was predominated by natural evolution from 1863 to 1935, during which the coastline barely changed. Thereafter, human intervention became intense and more and more natural tidal flats were replaced by salt ponds, aquaculture area, and reclamation very quickly. As a result, tidal prism, area of tidal flats, and area of JZB decreased sharply by 0.290 km3, 182 km2, and 223 km2, respectively, from 1935 to 2020, corresponding to annual decreasing rates being of 123 times, 10 times, 12 times, respectively, as that of before 1935. A numerical model showed that the residual current in JZB tended to be weaker due to the change of coastline and bathymetry, which is not favoring the water-exchange and pollutant transport, especially in the northeast of JZB. The basin residence time increased from 15.5 days in 1935 to 17.6 days in 2020, because of weaker residual tidal current and smaller tidal prism. Local residence time increased significantly near the area with large land reclamation, especially in the northeast and west of JZB. Distribution of dissolved inorganic nitrogen (DIN), in each year, which is the dominant pollutant in JZB, indicated higher DIN concentration and weaker transport along with reclamation. The research on JZB evolution over the last 150 years can provide useful suggestions for the decision-makers of the local government to improve the marine ecosystem. The systematic method to investigate long-term water environment evolution of JZB can be used to study other semi-closed bays.

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Section: Residence Time Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response of Water Environment to Land Reclamation in Jiaozhou Bay, China Over the Last 150 Years

Zhou

et al. 2021

Front. Mar. Sci.

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“…The reference 3-D approaches used the whole 3-D velocity dataset. Weak and strong vertical turbulences were defined by low (10 −5 m 2 s −1 ) and high (10 −4 m 2 s −1 ) values of the vertical diffusivity coefficients typical of marine systems (Talley et al, 2011). With weak turbulence, particles remained near the surface during the whole simulation (standard deviation of particles depths, σ , equals 0.7 m), whereas strong turbulent conditions induced high vertical displacements of particles (σ equals 2.5 m).…”

Section: Model Settingsmentioning

confidence: 99%

“…C j i (τ ) was thus calculated for five time intervals τ = 1, 2, 3, 4 and 5 d. This results in five 18 × 18 connectivity matrices that describe the probability of microplastics particles being transported between different sites along the whole Jervis Bay coast. Readers should refer to van Sebille et al (2018) and Mitarai et al (2009) for a detailed description and application of both probability-density maps and connectivity analysis.…”

Section: Coastal Connectivity Analysismentioning

confidence: 99%

Technical note: On the importance of a three-dimensional approach for modelling the transport of neustic microplastics

Jalón‐Rojas¹,

Xiao-hua²,

Fredj

2019

Ocean Sci.

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Understanding and estimating the distribution and transport of microplastics in marine environments has been recognized as a major global research issue. Most of the existing research on transport modelling has focused on lowdensity particles floating in surface waters, using a 2-D Lagrangian approach and ignoring the vertical displacement of particles. In this work, we evaluate to what extent the vertical movement of particles within surface waters by mixing processes may affect the horizontal transport and fate of microplastics. The aim is to determine whether a 2-D approach is sufficient for the accurate modelling of neusticmicroplastics transport or whether a 3-D approach is necessary. For this purpose, we compare visually and statistically the microplastics transport patterns of three simulations in a coastal system: one using a 2-D approach; and two using a 3-D approach with weak and strong vertical turbulence, respectively. The 2-D simulation roughly reproduced the transport and accumulation patterns, but accurate results required a 3-D approach. This was particularly important for strong vertical turbulence and regions characterized by strong vertical current shear. Moreover, a 2-D approach can lead to errors in the results even with negligible turbulence due to simplifications in the velocity field. A 3-D modelling approach is therefore key to an accurate estimation and prediction of microplastics distribution in coastal systems and consequently for planning mitigation and cleaning programmes.Published by Copernicus Publications on behalf of the European Geosciences Union.

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“…We used hydrodynamic model results from the Princeton Ocean Model (POM) as inputs. In particular, we used the hydrodynamics data from 24 June to 11 July 1998, as the model was validated using observation of currents, temperature, salinity and water level during this period, obtaining a very good fit (Wang and Symonds, 1999;Sun et al, . During this simulation period, Jervis Bay was characterized by its typical circulation pattern: clockwise and anticlockwise circulation in the northern and southern regions, respectively.…”

Section: Model Settingsmentioning

confidence: 99%

Technical note: On the importance of a three-dimensional approach for modelling the transport of neustic microplastics

Jalón‐Rojas¹,

Wang²,

Fredj³

2019

Preprint

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Abstract. Understanding and estimating the distribution and transport of microplastics in marine environments has been recognized as a major global research issue. Most of the existing research on transport modelling has focused on low-dense particles floating in surface waters, using a 2D Lagrangian approach and ignoring the vertical displacement of particles. In this work, we evaluate to what extent the vertical movement of particles within surface waters by mixing processes may affect the horizontal transport and fate of microplastics. The aim is to determinate whether a 2D approach is sufficient for the accurate modelling of neustic-microplastics transport or a 3D approach is necessary. For this purpose, we compare visually and statistically the microplastics transport patterns of three simulations in a coastal system: one using a 2D approach; and two using a 3D approach with weak and strong vertical turbulence, respectively. The 2D simulation roughly reproduced the transport and accumulation patterns, but accurate results required a 3D approach. This was particularly important for strong vertical turbulence and regions characterized by strong vertical current shear. Moreover, a 2D approach can lead to errors in the results even with negligible turbulence due to simplifications in the velocity field. A 3D modelling approach is therefore key to an accurate estimation and prediction of microplastics distribution in coastal systems, and consequently for planning mitigation and cleaning programs.

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Coastal upwelling by wind-driven forcing in Jervis Bay, New South Wales: A numerical study for 2011

Cited by 16 publications

References 45 publications

Response of Water Environment to Land Reclamation in Jiaozhou Bay, China Over the Last 150 Years

Response of Water Environment to Land Reclamation in Jiaozhou Bay, China Over the Last 150 Years

Technical note: On the importance of a three-dimensional approach for modelling the transport of neustic microplastics

Technical note: On the importance of a three-dimensional approach for modelling the transport of neustic microplastics

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