|
The U.S. Naval Research Laboratory (NRL) Marine Meteorology Division team will investigate numerical modeling of turbulent flux and atmospheric surface layer profiles of wind, heat and moisture in coastal and littoral zones using the Navy’s state-of-the-science numerical weather prediction (NWP) systems. The primary aim is to develop, in collaboration with other CLASI investigation groups, a “coast-aware” parameterization of the atmospheric surface layer for NWP systems that will more accurately capture the complex physical processes affecting the atmospheric surface layer in coastal and littoral regions. Improved characterization and parameterization of these processes will contribute toward more accurate modeling of near-surface wind speed and direction as well as the atmospheric boundary layer in general.
The team will first quantify and characterize discrepancies between Navy model predictions and measurements of key atmospheric surface layer fields using available field measurement datasets and the Navy’s Coupled |
A 12-hr forecast of wind speed (filled contours) and direction (arrows) from COAMPS® at the lowest model vertical level (approximately 10 m above the surface) over the Monterey Bay, California, USA region valid at 5:00 PM local time on August 16th, 2021. The COAMPS fields shown here are from a grid with 333-m horizontal resolution; the wind speed is shown at the grid resolution and the wind direction is shown at a 3.3 km resolution. The grid is approximately 99 km from west to east and 85 km from north to south. Figure created by Jacob Yung, Science Applications International Corporation.
|
Ocean/Atmosphere Mesoscale Prediction System (COAMPS®). Investigators at NRL will then evaluate COAMPS prediction fields through both real and idealized simulations of the coastal environment to understand how the prediction fields adhere to expectations from theory and existing field observations. The team will further investigate the COAMPS performance against large-eddy simulation of coastal and littoral zones through collaboration with the University of Minnesota.
Using new, groundbreaking, long-duration measurements taken by the CLASI investigation groups at fields sites along and adjacent to the coastline, the NRL team will then add new capability to existing NWP parameterizations that incorporates the impacts of coastal and littoral processes on the atmospheric surface layer. The team will validate this new parameterization in COAMPS and later implement the parameterization for use within the Navy’s next-generation NWP system: the Navy Environmental Prediction system Using a Nonhydrostatic Engine (NEPTUNE).
Using new, groundbreaking, long-duration measurements taken by the CLASI investigation groups at fields sites along and adjacent to the coastline, the NRL team will then add new capability to existing NWP parameterizations that incorporates the impacts of coastal and littoral processes on the atmospheric surface layer. The team will validate this new parameterization in COAMPS and later implement the parameterization for use within the Navy’s next-generation NWP system: the Navy Environmental Prediction system Using a Nonhydrostatic Engine (NEPTUNE).
U.S. Naval Research Laboratory Team
To find the experimental forecasts for CLASI Monterey, follow this link:
https://cavu.nrlmry.navy.mil/COAMPSOS/archer/CLASI/
https://cavu.nrlmry.navy.mil/COAMPSOS/archer/CLASI/
COAMPS® is a registered trademark of the U.S. Naval Research Laboratory
