Overview of Operational Ocean Forecasting in the U.S. Navy: Past, Present &amp; Future

Burnett, William; Harper, Scott; Preller, Ruth H.; Jacobs, Gregg A.; LaCroix, Kevin

doi:10.5670/oceanog.2002.31

Cited by 11 publications

(4 citation statements)

References 4 publications

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“…Hodur, 1997) and for ocean forecasting (e.g. Burnett et al, 2002). These immensely complex codes combine pseudo‐laminar fluid dynamics variously with empirical parametrization schemes for unresolved internal processes and for imposed surface fluxes, significant orography, complex bathymetry including basin shape, radiative transfer and a host of other important features.…”

Section: Introductionmentioning

confidence: 99%

Initial-boundary compatibility for inverse regional models

Muccino¹,

Bennett²

2004

Tellus A

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In this paper we investigate the importance of compatibility conditions in inverse regional models. In forward models, the initial condition and boundary condition must be continuous at the space–time corner to ensure that the solution is continuous at the space–time corner and along the characteristic emanating from it. Furthermore, the initial condition, boundary condition and forcing must satisfy the partial differential equation at the space–time corner to ensure that the solution is continuously differentiable at the space–time corner and along the characteristic emanating from it. Assimilation of data into a model requires a null hypothesis regarding residuals in the dynamics (including, for example, forcing, boundary conditions and initial conditions) and data. In most published work, these errors are assumed to be uncorrelated, although Bogden does investigate the importance of correlation between boundary conditions and forcing, and shows that by generalizing the penalty functional to include this cross‐correlation the open boundaries behave more like an interface with a true ocean. In this paper, the more general importance of cross‐correlations and their impact on the smoothness of the optimal solution are discussed. It is shown that in the absence of physical diffusion, cross‐correlations are necessary to obtain a smooth solution; if errors are assumed to be uncorrelated, discontinuities propagate along the characteristic emanating from the space–time corner, even when the initial condition, boundary condition and forcing are compatible, as described above. Although diffusion damps such discontinuities, it does not reproduce the inherently smooth solution achieved when cross‐correlation of residuals are accounted for. Rather, the discontinuity is smoothed into a spurious front.

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Section: Introductionmentioning

confidence: 99%

Initial-boundary compatibility for inverse regional models

Muccino¹,

Bennett²

2004

Tellus A

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“…Until computer resources become sufficient to run a global model at resolutions to accurately describe the required dynamics, a nesting approach (figure 5) is required. Burnett et al (2002) provides a table of current operational or near-operational prediction systems, from ocean currents to thermal structure to surface waves, and how they are used. The present global, dynamic ocean prediction capability is based on a combination of the Navy Layered Ocean Model (NLOM) and the global application of the Navy Coastal Ocean Model (NCOM) as described by Rhodes et al (2002).…”

Section: Link To Godaementioning

confidence: 99%

“…Technological change has greatly influenced the nature of these transformations. The longer time scales of navigational charting and ocean data base creation, while still important, are being superseded by more immediate response capabilities where near-real-time oceanographic knowledge can now provide relevant environmental information within the warfighter's tactical decision loop (Burnett et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…U.S. NAVY operational oceanography structure Burnett et al (2002) provides a comprehensive description of how the U.S. Navy conducts operational oceanography with two production centers and several geographically-distributed regional centers and detachments associated with the various U.S. fleets around the world. In keeping with the history of changing requirements and the necessity to provide ever more user-focused, ocean information within the warfighter's decision loop, this geographic-centered approach began changing in late 2004 (Rear Admiral Timothy McGee, Commander, Naval Meteorology and Oceanography Command (CNMOC), personal communication).…”

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confidence: 99%

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Operational Oceanography in the U.S. Navy: A GODAE Perspective

Harding

Rigney

Ocean Weather Forecasting

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Operational oceanography, throughout its long history, has continually evolved in order to remain relevant to the changing operational needs of the U.S. Navy. This transformation continues today as operational oceanography plays a key role in the rapidly shrinking tactical decision timelines of the naval warfighter. Understanding the warfighter's tactical questions and translating the information available from the ocean sciences into tactically useful answers is key to this transformation. Appreciating and applying advances in oceanography, such as those provided by the international Global Ocean Data Assimilation Experiment (GODAE), assures the highest technical quality of these answers. We address these transformation and translation processes and the nature of U.S. Navy operational oceanography today with specific emphasis on its interaction with GODAE.

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Perspectives from the Global Ocean Data Assimilation Experiment

Smith

Ocean Weather Forecasting

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Overview of Operational Ocean Forecasting in the U.S. Navy: Past, Present & Future

Cited by 11 publications

References 4 publications

Initial-boundary compatibility for inverse regional models

Initial-boundary compatibility for inverse regional models

Operational Oceanography in the U.S. Navy: A GODAE Perspective

Perspectives from the Global Ocean Data Assimilation Experiment

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