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Characterization and Modeling of Archipelago Strait Dynamics

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Research rept.

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The goal of this project is to meet future Navy environmental forecasting requirements through a better understanding of the importance of atmospheric forcing mechanisms on the ocean and scales to numerical model resolution in coastal and other complex geometry regions. The objectives of this project are to evaluate high-resolution atmospheric numerical modeling skill through real-time forecast support of research cruise operations and ocean modeling experiments over the Philippine archipelago, and to investigate the sensitivity of atmospheric and ocean model forecasts to horizontal model resolution in the straits and coastal regions of this complex archipelago, using both one-way and two-way coupling between the ocean and atmosphere. Accurate ocean prediction in coastal regions, such as the Philippine archipelago, depends on atmospheric forcing with sufficient resolution to represent complex flow through the straits, around islands, and in coastal boundary regions. Our approach is to use the existing atmospheric and ocean data assimilation and modeling infrastructure of the Coupled OceanAtmosphere Mesoscale Prediction System COAMPS to provide high-resolution atmospheric fields to support ocean modeling research over the Philippine archipelago. COAMPS and COAMPS-OS are registered trademarks of the Naval Research Laboratory. COAMPS has four major components the NRL Atmospheric Variational Data Assimilation System NAVDAS for atmospheric analyses the NRL Coupled Ocean Data Assimilation System NCODA system for ocean analyses the NRL nested, non-hydrostatic atmospheric model and the NRL Coastal Ocean Model NCOM. Two-way atmosphere-ocean coupling is available using the Earth Systems Modeling Framework ESMF to provide communication between the atmosphere COAMPS and ocean NCOM.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Computer Programming and Software

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