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A Comparison of Data Assimilation Methods Using a Planetary Geostrophic Model
Publisher: American Meteorological Society
Abstract: Assimilating hydrographic observations into a planetary geostrophic model is posed as a problem in control theory. The cost functional is the sum of weighted model and data residuals. Model errors are assumed to be spatially ...
Ocean and Ice Shelf Tides from CryoSat-2 Altimetry
Publisher: American Meteorological Society
Abstract: AbstractA new empirical model of ocean tides has been developed for the Weddell Sea, south of 66°S, between 90°W and 0°, using six years of radar altimeter data from the CryoSat-2 satellite mission. Because of its long ...
Baroclinic Tidal Sea Level from Exact-Repeat Mission Altimetry
Publisher: American Meteorological Society
Abstract: A near-global model for the sea surface expression of the baroclinic tide has been developed using exact-repeat mission altimetry. The methodology used differs in detail from other altimetry-based estimates of the open ...
Estimates of Baroclinic Tidal Sea Level and Currents from Lagrangian Drifters and Satellite Altimetry
Publisher: American Meteorological Society
A New Look at Richardson Number Mixing Schemes for Equatorial Ocean Modeling
Publisher: American Meteorological Society
Abstract: A reexamination of turbulence dissipation measurements from the equatorial Pacific shows that the turbulence diffusivities are not a simple function of the gradient Richardson number. A widely used mixing scheme, the ...
An Analysis of Secular Change in Tides at Open-Ocean Sites in the Pacific
Publisher: American Meteorological Society
Abstract: ourly sea level is examined at 25 open-ocean stations in the Pacific Ocean with records longer than 30 yr. A search for trends finds that the amplitude of the dominant semidiurnal tide M2 is increasing at 12 of the 13 sites ...
Time-Variable Refraction of the Internal Tide at the Hawaiian Ridge
Publisher: American Meteorological Society
Abstract: he interaction of the dominant semidiurnal M2 internal tide with the large-scale subtidal flow is examined in an ocean model by propagating the tide through an ensemble of background fields in a domain centered on the ...
Identification and Reduction of Retracker-Related Noise in Altimeter-Derived Sea Surface Height Measurements
Publisher: American Meteorological Society
Abstract: ata from the Jason-2 calibration/validation mission phase have been analyzed to identify the correlation between sea surface height (SSH) and significant wave height (SWH) errors. A cross-spectral analysis indicates that ...
Estimating Open-Ocean Barotropic Tidal Dissipation: The Hawaiian Ridge
Publisher: American Meteorological Society
Abstract: The generalized inverse of a regional model is used to estimate barotropic tidal dissipation along the Hawaiian Ridge. The model, based on the linear shallow-water equations, incorporates parameterizations for the dissipation ...
Internal Gravity Waves and Meso/Submesoscale Currents in the Ocean: Anticipating High-Resolution Observations from the SWOT Swath Altimeter Mission
Publisher: American Meteorological Society