Integrating altimetry and coastal ocean observing systems for coastal circulation applications at multiple temporal and spatial scales

John Wilkin (Rutgers University, United States)


Douglas Vandemark (University of New Hampshire, United States); Hui Feng (University of New Hampshire, United States); Julia Levin (Rutgers University, United States); Javier Zavala-Garay (Rutgers University, United States)

Event: 2020 Ocean Surface Topography Science Team Meeting (virtual)

Session: Salient results from the 2017-2020 OSTST PIs

Presentation type: Type Forum

Multi-mission near-to-coast range corrected “coastal altimetry” SSH is merged with a high-resolution ocean circulation model (ROMS; Regional Ocean Modeling System) using 4-dimensional variational (4D-Var) methods for data assimilation (DA).

The system is implemented for the Gulf of Maine, Mid-Atlantic Bight and adjacent Slope Sea of the Northwest Atlantic Ocean.

The near-real-time DA model produces a 3-day forecast every day in support of U.S. IOOS. The impact of altimeter data in the system is evaluated using the Observation Impact analysis approach made possible by the ROMS 4D-Var design.

Altimeter based data products (including GlobCurrent analyses and Sentinel-3A SAR) are also evaluated for their ability to represent mean and variability of coastal currents in the Gulf of Maine and adjacent shelf waters.
John Wilkin
Rutgers University
United States