| Performance of Mixed Layer Models in Simulating SST in the Equatorial Pacific Ocean |
23 FEB 2008 |
17 pages |
| Authors:
Birol Kara; Alan J. Wallcraft; Paul J. Martin; Eric P. Chassignet; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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 | This paper examines the ability of three ocean mixed layer submodels to depict inter-annual variations of sea surface temperature (SST) in a global configuration of the HYbrid Coordinate Ocean Model (HYCOM). The mixed layer submodels are (1) the K-Profile Parameterization (KPP), (2) the NASA Goddard Institute for Space Studies (GISS) turbulence closure, and (3) the Mellor-Yamada Level 2.5 (MY) turbulence closure. Accuracy of SSTs from the submodels is investigated during ... |
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| A Real-Time Coastal Ocean Prediction Experiment for MREA04 |
JAN 2008 |
13 pages |
| Authors:
Dong S. Ko; Clark D. Rowley; Paul J. Martin; Ruth H. Preller; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| To provide a short-tern ocean forecast for sea level variation, current temperature, and salinity, an ocean nowcast/forecast system has been developed The system is an integration of a data-assimilating, dynamical ocean model, a statistical data-analysis model, and various data streams for ocean bathymetry, climatological data, surface forcing, open boundary forcing, and observations. The system assimilates satellite data and in-situ measurements to produced an estimations of the current ocean State or ... |
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| Multi-Model Super-Ensemble Ocean Prediction: An Operational Example Using a Kalman Filter in the Adriatic Sea |
APR 2007 |
2 pages |
| Authors:
Michel Rixen; Jeffery W. Book; Paul J. Martin; Nadia Pinardi; Paolo Oddo; Jacopo Chiggiato; Nello Russo; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Multi-model Super-Ensembles (SE) aim at combining optimally different models. A dynamic Kalman Filter version of this technique was applied to a unique set of in-situ data and operational ocean models during the Dynamics of the Adriatic in Real-Time (DART) field experiment. The technique was shown to significantly improve forecasting skills. |
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| Modeling the Northern Adriatic Double-Gyre Response to Intense Bora Wind: A Revist |
27 DEC 2006 |
28 pages |
| Authors:
Milivoj Kuzmic; Ivica Janekovic; Jeffrey W. Book; Paul J. Martin; James D. Doyle; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| A combination of recent intensive observations and simulations with two numerical models is used to revisit the issue of the northern Adriatic response to strong bora episodes. New observed and simulated data reinforce the view that an episode of a strong bora wind provokes a double-gyre (cyclonic, Trieste, and anticyclonic, Rovinj) response north of the Po Delta-Pula line. During an intense bora episode, both measured and modeled statistics picture a ... |
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| Formulation, Implementation and Examination of Vertical Coordinate Choices in the Global Navy Coastal Ocean Model (NCOM) |
2006 |
31 pages |
| Authors:
Charlie N. Barron; A. B. Kara; Paul J. Martin; Robert C. Rhodes; Lucy F. Smedstad; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| A 1/8 degrees global version of the Navy Coastal Ocean Model (NCOM) is described with details of its formulation, implementation, and configuration of the vertical coordinate. NCOM is a baroclinic, hydrostatic, Boussinesq, free-surface ocean model that allows its vertical coordinate to consist of sigma coordinates for the upper layers and z-levels below a user-specified depth. This flexibility allows implementation of a hybrid sigma-z coordinate system that is expected to mitigate ... |
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| Validation of Interannual Simulations From the 1/8 deg Global Navy Coastal Oecan Model (NCOM) |
2006 |
25 pages |
| Authors:
A. B. Kara; Charlie N. Barron; Paul J. Martin; Lucy F. Smedstad; Robert C. Rhodes; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| A 1/8 degrees global version of the Navy Coastal Ocean Model (NCOM) is used for simulation of upper-ocean quantities on interannual time scales. The model spans the global ocean from 80 degrees to a complete Arctic cap, and includes 19 terrain-following sigma- and 21 fixed z-levels. The global NCOM assimilates three-dimensional (3D) temperature and salinity fields produced by the Modular Ocean Data Assimilation System (MODAS) which generates synthetic temperature and ... |
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| Second-Mode Internal Tides in the East China Sea Deduced from Historical Hydrocasts and a Model |
16 MAR 2005 |
6 pages |
| Authors:
Jae-Hun Park; Magdalena Andres; Paul J. Martin; Mark Wimbush; D. R. Watts; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| From historical hydrocasts in the Okinawa Trough region of the East China Sea (ECS), acoustic echo time from 700 dbar to the surface shows a tight relationship with temperature (T) except near the 100-200-dbar layer. This is caused by 2nd- or higher-mode baroclinic variations. Significant out-of-phase correlation between upper and lower layer T from the hydrocasts confirms that 2nd-mode variations are strong. Furthermore, the 2nd-mode variations are dominant during the ... |
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| Dependence of Ocean Heating on the Distribution of Spectral Irradiance in the North Atlantic |
1992 |
12 pages |
| Authors:
Robert A. Arnone; Gregory E. Terrie; Paul J. Martin; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
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| Subsurface heating rates from visible solar irradiance were computed for the North Atlantic for May 1979 during the period of the spring bloom. The visible spectrum between 400 and 700 nm accounts for a substantial fraction, about 43%, of the total solar irradiance at the sea surface, and comprises most of the solar irradiance that penetrates more than a meter into the sea. The mean monthly spectral diffuse attenuation coefficients ... |
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