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Ansong, J.K.; Arbic, B.K.; Simmons, H.L.; Alford, M.H.; Buijsman, M.C.; Timko, P.G.; Richman, J.G.; Shriver, J.F.; Wallcraft, A.J. | ||||
| Title | Geographical Distribution of Diurnal and Semidiurnal Parametric Subharmonic Instability in a Global Ocean Circulation Model | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Journal of Physical Oceanography | Abbreviated Journal | J. Phys. Oceanogr. |
| Volume | 48 | Issue | 6 | Pages | 1409-1431 |
| Keywords | Baroclinic flows; Internal waves; Nonlinear dynamics; Ocean dynamics; Baroclinic models; Ocean models | ||||
| Abstract | The evidence for, baroclinic energetics of, and geographic distribution of parametric subharmonic instability (PSI) arising from both diurnal and semidiurnal tides in a global ocean general circulation model is investigated using 1/12.5° and 1/25° simulations that are forced by both atmospheric analysis fields and the astronomical tidal potential. The paper examines whether PSI occurs in the model, and whether it accounts for a significant fraction of the tidal baroclinic energy loss. Using energy transfer calculations and bispectral analyses, evidence is found for PSI around the critical latitudes of the tides. The intensity of both diurnal and semidiurnal PSI in the simulations is greatest in the upper ocean, consistent with previous results from idealized simulations, and quickly drops off about 5° from the critical latitudes. The sign of energy transfer depends on location; the transfer is positive (from the tides to subharmonic waves) in some locations and negative in others. The net globally integrated energy transfer is positive in all simulations and is 0.5%�10% of the amount of energy required to close the baroclinic energy budget in the model. The net amount of energy transfer is about an order of magnitude larger in the 1/25° semidiurnal simulation than the 1/12.5° one, implying the dependence of the rate of energy transfer on model resolution. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0022-3670 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 976 | ||
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| Author |
Dukhovskoy, D.S.; Morey, S.L.; Martin, P.J.; O'Brien, J.J.; Cooper, C. | ||||
| Title | Application of a vanishing, quasi-sigma, vertical coordinate for simulation of high-speed, deep currents over the Sigsbee Escarpment in the Gulf of Mexico | Type | $loc['typeJournal Article'] | ||
| Year | 2009 | Publication | Ocean Modelling | Abbreviated Journal | Ocean Modelling |
| Volume | 28 | Issue | 4 | Pages | 250-265 |
| Keywords | Numerical models; Deep currents; Topographic waves; Numerical truncation error; Vertical discretization; Sigsbee Escarpment; Gulf of Mexico | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1463-5003 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 399 | ||
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| Author |
Dukhovskoy, D.S.; Morey, S.L.; O'Brien, J.J. | ||||
| Title | Generation of baroclinic topographic waves by a tropical cyclone impacting a low-latitude continental shelf | Type | $loc['typeJournal Article'] | ||
| Year | 2009 | Publication | Continental Shelf Research | Abbreviated Journal | Continental Shelf Research |
| Volume | 29 | Issue | 1 | Pages | 333-351 |
| Keywords | Baroclinic motion; Topographic waves; Low-frequency internal waves; Hurricanes; Caribbean Sea | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0278-4343 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | NOAA, NASA | Approved | $loc['no'] | ||
| Call Number | COAPS @ mfield @ | Serial | 397 | ||
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| Author |
Dukhovskoy, D.S.; Morey, S.L.; O'Brien, J.J. | ||||
| Title | Influence of multi-step topography on barotropic waves and consequences for numerical modeling | Type | $loc['typeJournal Article'] | ||
| Year | 2006 | Publication | Ocean Modelling | Abbreviated Journal | Ocean Modelling |
| Volume | 14 | Issue | 1-2 | Pages | 45-60 |
| Keywords | numerical models; ocean mathematical models; topographic waves; double Kelvin waves; continental shelves; shelf waves | ||||
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| ISSN | 1463-5003 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | ONR, NASA | Approved | $loc['no'] | ||
| Call Number | COAPS @ mfield @ | Serial | 443 | ||
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| Author |
Maksimova, E.V. | ||||
| Title | A conceptual view on inertial internal waves in relation to the subinertial flow on the central west Florida shelf | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Abbreviated Journal | Sci Rep | |
| Volume | 8 | Issue | 1 | Pages | 15952 |
| Keywords | GRAVITY-WAVES; HARMONIC-ANALYSIS; OCEAN; GENERATION; PATHWAYS; SPECTRUM | ||||
| Abstract | The study reported here focuses on inertial internal wave currents on the west Florida midshelf in 50 m depth. In situ observations showed that the seasonal shifts in stratification change both the frequency range of inertial internal waves and their modulation time scales. According to the analysis, the subinertial flow evolution time scales also undergo compatible seasonal variations, and the inertial internal wave currents appear to be temporally and spatially related to the subinertial flow. Specifically, the subinertial flow evolving on frontal-/quasi-geostrophic time scales appears to be accompanied by the near-inertial oscillations/inertia-gravity waves in corresponding small/finite Burger number regimes, respectively. The quasi-geostrophic subinertial currents on the west Florida shelf are probably associated with the synoptic wind-forced flow, whereas the frontal-geostrophic currents are related to the evolution of density fronts. Further details of this conceptual view should, however, be elucidated in the future. | ||||
| Address | Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, Florida, 32306, USA. evm07c@my.fsu.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2045-2322 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | 0374060PMC6206015 | Approved | $loc['no'] | ||
| Call Number | COAPS @ rl18 @ | Serial | 982 | ||
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| Author |
Morey, S. L.; Wienders, N.; Dukhovskoy, D. S.; Bourassa, M. A. | ||||
| Title | Impact of Stokes Drift on Measurements of Surface Currents from Drifters and HF Radar | Type | $loc['typeAbstract'] | ||
| Year | 2018 | Publication | American Geophysical Union | Abbreviated Journal | AGU |
| Volume | Fall Meeting | Issue | Pages | ||
| Keywords | 3307 Boundary layer processes, ATMOSPHERIC PROCESSESDE: 4504 Air/sea interactions, OCEANOGRAPHY: PHYSICALDE: 4560 Surface waves and tides, OCEANOGRAPHY: PHYSICALDE: 4572 Upper ocean and mixed layer processes, OCEANOGRAPHY: PHYSICAL | ||||
| Abstract | Concurrent measurements by surface drifters of different configurations and HF radar reveal substantial differences in estimates of the near-surface seawater velocity. On average, speeds of small ultra-thin (5 cm) drifters are significantly greater than co-located drifters with a traditional shallow drogue design, while velocity measurements from the drogued drifters closely match HF radar velocity estimates. Analysis of directional wave spectra measurements from a nearby buoy reveals that Stokes drift accounts for much of the difference between the velocity measurements from the drogued drifters and the ultra-thin drifters, except during times of wave breaking. Under wave breaking conditions, the difference between the ultra-thin drifter velocity and the drogued drifter velocity is much less than the computed Stokes drift. The results suggest that surface currents measured by more common approaches or simulated in models may underrepresent the velocity at the very surface of the ocean that is important for determining momentum and enthalpy fluxes between the ocean and atmosphere and for estimating transport of material at the ocean surface. However, simply adding an estimate of Stokes drift may also not be an appropriate method for estimating the true surface velocity from models or measurements from drogued drifters or HF radar under all sea conditions. | ||||
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| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1008 | ||
| Permanent link to this record | |||||
| Author |
Morey, S.; Wienders, N.; Dukhovskoy, D.; Bourassa, M. | ||||
| Title | Measurement Characteristics of Near-Surface Currents from Ultra-Thin Drifters, Drogued Drifters, and HF Radar | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Remote Sensing | Abbreviated Journal | Remote Sensing |
| Volume | 10 | Issue | 10 | Pages | 1633 |
| Keywords | surface drifters; surface currents; HF Radar; STOKES DRIFT; SEA-SURFACE; WAVES; BREAKING; VALIDATION; TRANSPORT | ||||
| Abstract | Concurrent measurements by satellite tracked drifters of different hull and drogue configurations and coastal high-frequency radar reveal substantial differences in estimates of the near-surface velocity. These measurements are important for understanding and predicting material transport on the ocean surface as well as the vertical structure of the near-surface currents. These near-surface current observations were obtained during a field experiment in the northern Gulf of Mexico intended to test a new ultra-thin drifter design. During the experiment, thirty small cylindrical drifters with 5 cm height, twenty-eight similar drifters with 10 cm hull height, and fourteen drifters with 91 cm tall drogues centered at 100 cm depth were deployed within the footprint of coastal High-Frequency (HF) radar. Comparison of collocated velocity measurements reveals systematic differences in surface velocity estimates obtained from the different measurement techniques, as well as provides information on properties of the drifter behavior and near-surface shear. Results show that the HF radar velocity estimates had magnitudes significantly lower than the 5 cm and 10 cm drifter velocity of approximately 45% and 35%, respectively. The HF radar velocity magnitudes were similar to the drogued drifter velocity. Analysis of wave directional spectra measurements reveals that surface Stokes drift accounts for much of the velocity difference between the drogued drifters and the thin surface drifters except during times of wave breaking. | ||||
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| ISSN | 2072-4292 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ rl18 @ | Serial | 985 | ||
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| Author |
Nyadjro, E.S.; Jensen, T.G.; Richman, J.G.; Shriver, J.F. | ||||
| Title | On the Relationship Between Wind, SST, and the Thermocline in the Seychelles-Chagos Thermocline Ridge | Type | $loc['typeJournal Article'] | ||
| Year | 2017 | Publication | IEEE Geoscience and Remote Sensing Letters | Abbreviated Journal | IEEE Geosci. Remote Sensing Lett. |
| Volume | 14 | Issue | 12 | Pages | 2315-2319 |
| Keywords | Altimetry; HYbrid Coordinate Ocean Model (HYCOM); Indian Ocean Dipole (IOD); ocean-atmosphere coupling; Rossby waves; sea surface temperature (SST); thermocline depth; winds | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1545-598X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 465 | ||
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| Author |
Paget, A.C.; Bourassa, M.A.; Anguelova, M.D. | ||||
| Title | Comparing in situ and satellite-based parameterizations of oceanic whitecaps | Type | $loc['typeJournal Article'] | ||
| Year | 2015 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 120 | Issue | 4 | Pages | 2826-2843 |
| Keywords | whitecap fraction; foam fraction; whitecap coverage; breaking waves; actively breaking waves; air-sea interaction processes; in situ whitecap observations scatterometers; QuikSCAT; WindSat; microwave radiometry; passive remote sensing; satellite oceanography | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 108 | ||
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| Author |
Palacios-Hernández, E.; Carrillo, L.; Lavín, M.F.; Zamudio, L.; García-Sandoval, A. | ||||
| Title | Hydrography and circulation in the Northern Gulf of California during winter of 1994-1995 | Type | $loc['typeJournal Article'] | ||
| Year | 2006 | Publication | Continental Shelf Research | Abbreviated Journal | Continental Shelf Research |
| Volume | 26 | Issue | 1 | Pages | 82-103 |
| Keywords | seasonal circulation; gyres; coastally trapped waves; ENSO; Gulf of California | ||||
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| ISSN | 0278-4343 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 442 | ||
| Permanent link to this record | |||||
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