Tropical Pacific Ocean model error covariances from Monte Carlo simulations

2005 ◽  
Vol 131 (613) ◽  
pp. 3643-3658 ◽  
Author(s):  
O. Alves ◽  
C. Robert
Keyword(s):  
Monte Carlo ◽  
Pacific Ocean ◽  
Monte Carlo Simulations ◽  
Model Error ◽  
Ocean Model ◽  
Tropical Pacific ◽  
Tropical Pacific Ocean

A Comparison of Adaptive Kalman Filters for a Tropical Pacific Ocean Model

1997 ◽  
Vol 125 (1) ◽  
pp. 40-58 ◽  
Author(s):  
Isabelle Blanchet* ◽  
Claude Frankignoul ◽  
Mark A. Cane
Keyword(s):  
Pacific Ocean ◽  
Kalman Filters ◽  
Ocean Model ◽  
Tropical Pacific ◽  
Tropical Pacific Ocean

Tropical-ocean-atmosphere interactions in a coupled model

1989 ◽  
Vol 329 (1604) ◽  
pp. 207-223 ◽  
Keyword(s):  
Pacific Ocean ◽  
General Circulation ◽  
Southern Oscillation ◽  
Heat Budget ◽  
Circulation Model ◽  
Ocean Model ◽  
Tropical Pacific ◽  
Sea Surface ◽  
Tropical Pacific Ocean ◽  
Tropical Ocean

A high-resolution tropical Pacific Ocean model coupled to a medium-resolution atmospheric general circulation model has been integrated for 2 years. A seasonal cycle was included. The atmospheric model when forced with climatological seasonally varying sea surface temperatures simulates the surface stress and net surface heating over the tropical Pacific Ocean to within the uncertainty in the climatological estimates in these quantities. When coupled, however, the models drift into an annually recurring anomalous state, similar in many respects to the El Nino Southern Oscillation observed in the ocean and atmosphere. The model results emphasize the role of off-equatorial anomalies in temperature, atmospheric heating and wind response. Air—sea heat exchange is found to be dominant in determining sea surface temperature changes in these off-equatorial regions. Both cloud and evaporative feedbacks are important in the anomalous surface heat budget.

Numerical simulation of the dispersion of a sediment plume induced by seabed dredging in the northeastern tropical Pacific Ocean

2021 ◽  
Author(s):  
Kaveh Purkiani ◽  
Benjamin Gillard ◽  
André Paul ◽  
Matthias Haeckel ◽  
Sabine Haalboom ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Numerical Models ◽  
Sediment Concentration ◽  
Ocean Model ◽  
Tropical Pacific ◽  
Far Field ◽  
Plume Dispersion ◽  
Tropical Pacific Ocean ◽  
Seabed Topography ◽  
Ocean Hydrodynamics

<p>Prediction of the dispersion of sediment plumes induced by potential mining activities is still very limited due to operational limitations on <em>in-situ</em> observations required for a thorough validation and calibration of numerical models. Here we report on a plume dispersion experiment carried out in the German License Area for the exploration of polymetallic nodules in the northeastern tropical Pacific Ocean. The dispersion of a sediment plume induced by a dredging experiment in April 2019 was investigated by employing a hydrodynamic high-resolution regional ocean model coupled to a sediment transport module.</p><p>Various aspects including sediment characteristics and ocean hydrodynamics are examined to obtain the best statistical agreement between observation and model results. Results show that the model is capable to reproduce suspended sediment concentration and re-deposition patterns observed in the dredging experiment. Due to a strong southward current during the experiment, the model predicts no sediment deposition and plume dispersion north of the dredging tracks. The sediment re-deposition thickness reaches up to 9 mm at the dredging tracks and 0.01 mm at far-field at a distance of about 500 m from the dredging tracks.</p><p>The model results suggest that seabed topography and variable sediment release heights above the seafloor cause significant changes especially for the low sedimentation pattern in the far-field region due to different current regimes. The termination of seawater stratification can rise sediment plume above the seafloor and spread it in a larger vertical distances up to 10 m from the seafloor.</p>

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