| Sediment Transport on Continental Shelves: Storm Bed Formation and Preservation in Heterogeneous Sediments |
Jan 2012 |
17 pages |
| Authors:
Timothy R Keen; R L Slingerland; San J Bentley; Yoko Furukawa; William J Teague; James D Dykes; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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 | Many storm beds are constructed of silt/sand layers interbedded with mud. The coarse sediment fraction originates from reworking of marine sands and/or erosion of the coastal active zone, which extends from fair-weather wave base to the beach berm or coastal dune. Observations and modelling studies show that some sand is removed from the active zone to the inner shelf during extratropical and tropical cyclones. On continental shelves that have large ... |
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| WAVEWATCH III: Transition to Naval Operations |
Nov 2011 |
5 pages |
| Authors:
James D Dykes; W E Rogers; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Knowledge of the sea state and ocean wave conditions is important for Naval operations, and it calls for real-time operational support of wave forecasts. Two operational centers have been providing such support. The Fleet Numerical Meteorology and Oceanography Center (FNMOC) in Monterey, California, produces and delivers wave forecasts covering large spatial and long time scales to support general operations. The Naval Oceanographic Office (NAVOCEANO) at Stennis Space Center, Mississippi, provides ... |
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| Implementation of the Automated Numerical Model Performance Metrics System |
26 Sep 2011 |
31 pages |
| Authors:
James D Dykes; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Known as AutoMetrics, this set of software modules was developed to provide model-observation and model-model comparison matchups and statistics to help modellers and forecasters assess the performance of ocean circulation models, primarily the Navy Coastal Ocean Model (NCOM) and the Hybrid Coordinate Ocean Model (HYCOM). This system is fully automatic and gives users much flexibility in what model runs to be evaluated by this system, in real-time operations or for ... |
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| Integrating Numerical Models with Data Analysis in Site Assessment |
Feb 2011 |
10 pages |
| Authors:
Timothy R Keen; James D Dykes; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS
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| The characterization and assessment of contaminated sites can be made more effective with the interactive use of in situ data, historical records, and results from predictive process-based numerical models. These three components can be difficult to merge because of space and time scales, as well as data formats and availability. We are developing an Application and Programming Interface (API) tool to make this procedure more accessible to a range of ... |
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| Automation of Ocean Model Performance Metrics |
15 Jan 2010 |
8 pages |
| Authors:
James D Dykes; Jay F Shriver; Sean Ziegeler; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| A system to rapidly and automatically assess the performance of numerical ocean modeling systems was developed by the U.S. Naval Research Laboratory (NRL). This includes the calculation of quantitative, objective metrics of the accuracy of ocean forecasts. The authors will present the results from this system, including metrics of surface and subsurface analysis and forecast fields. This work supports the U.S. Naval Oceanographic Office (NAVOCEANO), which provides oceanographic products in ... |
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| An Evaluation of a High-Resolution Operational Wave Forecasting System in the Adriatic Sea |
Jan-2009 |
20 pages |
| Authors:
Jeffrey W Book; James D Dykes; David W Wang; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| The SWAN (Simulating Waves Nearshore) wave model using wind inputs generated by the ALADIN 8-km, operational high-resolution, atmospheric model was run in real-time to provide surface waves forecast for the semi-enclosed Adriatic Sea in support of the Dynamics of the Adriatic in Real-Time (DART) field experiments. Together with predictions from other wave and wind models, the successful prediction of a high sea-state event by this model led to a real-time ... |
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| The Integrated Ocean Prediction System (IOPS) |
Jan 2002 |
11 pages |
| Authors:
Richard A Allard; James Kaihatu; Y L Hsu; James D Dykes; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
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| Knowledge of wave and surf conditions can play a major role in planning and executing a successful amphibious assault on a targeted beach (Figure 1). The dynamic surf zone is affected by waves that may have propagated from long distances (swell) and by refraction, which causes waves to become aligned with depth contours as they approach the coast. Local wind waves and tides can also change the character and width ... |
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