Application of the Spline Interpolation in Simulating the Distribution of Phytoplankton in a Marine NPZD Type Ecosystem Model

Li, Xiaona; Zheng, Quanxin; Lv, Xianqing

doi:10.3390/ijerph16152664

Cited by 6 publications

(3 citation statements)

References 39 publications

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“…is the diffusion term. The transport model has been used in previous studies and proven to be stable and reliable [21][22][23]. The region of the model is the Bohai Sea (37~41…”

Section: Modelmentioning

confidence: 99%

Study on Total Control of Total Nitrogen in the Laizhou Bay

Peng

Geng

Mao

et al. 2021

Water

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Human activity imposes a stronger and increasing impact on the coastal environment by land-based discharge and run-off pollution inputs. Land-based total nitrogen (TN) pollution, as the main cause of eutrophication in the Laizhou Bay, China, should be controlled effectively. Based on a three-dimensional pollution transport model, 20 groups of allocation schemes were designed under the requirement that the allocations of three estuaries in the inner bay were adjusted properly, while the two estuaries in the outer bay, i.e., the Yellow River and the Jiehe River, were kept unchanged. The statistical results show that the area ratio of heavily polluted seawater to the entire Laizhou Bay reached the maximum (35.14%) when the load allocation of the Xiaoqinghe River accounted for a high proportion (65%), and the Yuhe River and the Jiaolaihe River accounted for 15% and 20%, respectively. Overall, the pollution levels of the Laizhou Bay were positively associated with the allocation of the Xiaoqinghe River. Reducing pollutant allocation in the Xiaoqinghe River contributed most to the improvement of the seawater quality of the entire Laizhou Bay, and it was followed by a reduction in the Yuhe River and the Jiaolaihe River.

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“…is the diffusion term. The transport model has been used in previous studies and proven to be stable and reliable [21][22][23]. The region of the model is the Bohai Sea (37~41…”

Section: Modelmentioning

confidence: 99%

Study on Total Control of Total Nitrogen in the Laizhou Bay

Peng

Geng

Mao

et al. 2021

Water

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“…Wang et al [35] established a three-dimensional viscous sediment transport model with the adjoint assimilation method, and obtained good numerical simulation results. In addition, the adjoint assimilation method has also been applied in numerous other ecosystem dynamics and pollutant simulation studies [36][37][38][39].…”

Section: Adjoint Modelmentioning

confidence: 99%

Inversion of Initial Field Based on a Temperature Transport Adjoint

Jiao

Huang

Wang

et al. 2021

JMSE

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The setting of initial values is one of the key problems in ocean numerical prediction, with the accuracy of sea water temperature (SWT) simulation and prediction greatly affected by the initial field quality. In this paper, we describe the development of an adjoint assimilation model of temperature transport used to invert the initial temperature field by assimilating the observed data of sea surface temperature (SST) and vertical temperature. Two ideal experiments were conducted to verify the feasibility and validity of this method. By assimilating the “observed data”, the mean absolute error (MAE) between the simulated temperature data and the “observed data” decreased from 1.74 °C and 1.87 °C to 0.13 °C and 0.14 °C, respectively. The spatial distribution of SST difference and the comparison of vertical data also indicate that the regional error of vertical data assimilation is smaller. In the practical experiment, the monthly average temperature field provided by World Ocean Atlas 2018 was selected as background filed and optimized by assimilating the SST data and Argo vertical temperature observation data, to invert the temperature field at 0 a.m. on 1 December 2014 in the South China Sea. Through data assimilation, MAE was reduced from 1.29 °C to 0.65 °C. In terms of vertical observations data comparison and SST spatial distribution, the temperature field obtained by inversion is in good agreement with SST and Argo observations.

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“…The adjoint assimilation model can further simulate the real ocean scenario accurately through optimizing control parameters including initial conditions, boundary conditions and empirical parameters, which has been widely applied in oceanography for decades [28][29][30][31][32][33][34][35][36]. For example, Li et al and Zheng et al used the transport model to simulate the distribution of pollutants in the Bohai Sea [37,38]. Huang et al used a model of transport and degradation to estimate the degradation coefficient of petroleum hydrocarbon pollutants [39].…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Marine Ecosystem Damage from the Penglai 19-3 Oil Spill Accident

Han

Huang

Liu³

et al. 2021

JMSE

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Oil spills have immediate adverse effects on marine ecological functions. Accurate assessment of the damage caused by the oil spill is of great significance for the protection of marine ecosystems. In this study the observation data of Chaetoceros and shellfish before and after the Penglai 19-3 oil spill in the Bohai Sea were analyzed by the least-squares fitting method and radial basis function (RBF) interpolation. Besides, an oil transport model is provided which considers both the hydrodynamic mechanism and monitoring data to accurately simulate the spatial and temporal distribution of total petroleum hydrocarbons (TPH) in the Bohai Sea. It was found that the abundance of Chaetoceros and shellfish exposed to the oil spill decreased rapidly. The biomass loss of Chaetoceros and shellfish are 7.25×1014~7.28×1014 ind and 2.30×1012~2.51×1012 ind in the area with TPH over 50 mg/m3 during the observation period, respectively. This study highlights the evaluation of ecological resource loss caused by the oil spill, which is useful for the protection and restoration of the biological resources following the oil spill.

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Application of the Spline Interpolation in Simulating the Distribution of Phytoplankton in a Marine NPZD Type Ecosystem Model

Cited by 6 publications

References 39 publications

Study on Total Control of Total Nitrogen in the Laizhou Bay

Study on Total Control of Total Nitrogen in the Laizhou Bay

Inversion of Initial Field Based on a Temperature Transport Adjoint

An Assessment of Marine Ecosystem Damage from the Penglai 19-3 Oil Spill Accident

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