Residual effects of treated effluent diversion on a seaweed farm in a tidal strait using a multi-nested high-resolution 3-D circulation-dispersal model

Influences of the Kuroshio on Interisland Remote Connectivity of Corals Across the Nansei Archipelago in the East China Sea

“…The JCOPE2 product is provided as daily-averaged sea surface height (SSH), temperature, salinity, and meridional and zonal horizontal current velocities, which are spatiotemporally projected onto the perimeter of the ROMS-L1 model for the open boundary conditions. The one-way off-line nesting approach described in Mason et al (2010), Uchiyama et al (2014), Uchiyama, McWilliams, et al (2017), Uchiyama, Suzue, et al (2017), Uchiyama, Kanki, et al (2017), Uchiyama et al (2018), Kamidaira et al (2017Kamidaira et al ( , 2018, and Tada et al (2018) is applied to successively decreasing grid spacing from~10 km (JCOPE2) to 3 km (ROMS-L1), and further down to 1 km (ROMS-L2). The parent ROMS-L1 model is designed to encompass a wide area to account for the Kuroshio flowing from the Taiwan Strait, consisting of 768 × 768 horizontal grid cells and 32 vertically stretched terrain-and surface-following s layers (Shchepetkin & McWilliams, 2005).…”

A three-dimensional numerical assessment on the influences of treated sewage effluent on an adjacent seaweed farm with different discharge operations

“…We employed a quadruple-nested downscaling model based on Regional Oceanic Modeling System (ROMS; Shchepetkin and McWilliams, 2005 [5]) model. A 3-D Eulerian passive tracer model (Uchiyama et al, 2014 [6]; U18 [4]) was implemented into the innermost ROMS-L4 model to track the coastal dispersal of the sewage effluent. The…”

“…Thus, the innermost ROMS-L4 model resolution ultimately reached 20 m with vertically stretched 32 s-layers. The ROMS configurations were the same as those in U18 [4]; for instance, the L4 model was forced by surface wind stress from the Japan Meteorological Agency (JMA) Grid-Point Values-MesoScale Model (GPV-MSM), the monthly climatological surface heat/freshwater fluxes from the Comprehensive Ocean-Atmosphere Data Set (COADS). The principal ten tidal constituents from the TPXO7.0 global reanalysis provided additional sea surface elevation along the open boundaries of the L2 model, which spontaneously generated intrinsic barotropic and baroclinic tides through the open boundaries of the embedded L3 and L4 models.…”

“…The capability of tracking the sewage effluent is implemented into the innermost ROMS-L4 based on the non-dimensional Eulerian passive tracer concentration c with the near-field dilution submodel (Uchiyama et al, 2014 [6]; U18 [4]):…”

Residual circulations and associated water mass transport in the South China sea analyzed with a coupled HYCOM-ROMS downscaling ocean model

“…In the present study, we primarily aimed to develop a high-resolution, high-precision downscaling model for the SCS based on the Regional Oceanic Modeling System (ROMS, Shchepetkin and McWilliams, 2005 [2]), initialized and forced by the global HYbrid Coordinate Ocean Model (HYCOM) reanalysis conducted by the HYCOM consortium. A prototype of the proposing modeling system is the JCOPE2-ROMS system (e.g., Uchiyama et al, 2018 [3], 2017 [4], 2018 [5]; Tada et al 2018 [6]), where the child model relies on large-scale oceanic signals evaluated by the assimilative JCOPE2 reanalysis (Miyazawa et al, 2009 [7]). The developed HYCOM-ROMS downscaling system has a at lateral grid spacing of 5 km, which is sufficiently fine to resolve complex topography and bathymetry of the SCS, with covering not only the northern SCS but also the southern SCS including the Gulf of Thailand among others.…”