| Records |
| 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 |
$loc['typeAbstract'] |
| Year |
2018 |
Publication |
American Geophysical Union |
Abbreviated Journal |
AGU |
| Volume |
Fall Meeting |
Issue |
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Pages |
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| Keywords |
3307 Boundary layer processes, ATMOSPHERIC PROCESSESDE: 4504 Air/sea interactions, OCEANOGRAPHY: PHYSICALDE: 4560 Surface waves and tides, OCEANOGRAPHY: PHYSICALDE: 4572 Upper ocean and mixed layer processes, OCEANOGRAPHY: PHYSICAL |
| Abstract |
Concurrent measurements by surface drifters of different configurations and HF radar reveal substantial differences in estimates of the near-surface seawater velocity. On average, speeds of small ultra-thin (5 cm) drifters are significantly greater than co-located drifters with a traditional shallow drogue design, while velocity measurements from the drogued drifters closely match HF radar velocity estimates. Analysis of directional wave spectra measurements from a nearby buoy reveals that Stokes drift accounts for much of the difference between the velocity measurements from the drogued drifters and the ultra-thin drifters, except during times of wave breaking. Under wave breaking conditions, the difference between the ultra-thin drifter velocity and the drogued drifter velocity is much less than the computed Stokes drift. The results suggest that surface currents measured by more common approaches or simulated in models may underrepresent the velocity at the very surface of the ocean that is important for determining momentum and enthalpy fluxes between the ocean and atmosphere and for estimating transport of material at the ocean surface. However, simply adding an estimate of Stokes drift may also not be an appropriate method for estimating the true surface velocity from models or measurements from drogued drifters or HF radar under all sea conditions. |
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$loc['no'] |
| Call Number |
COAPS @ user @ |
Serial |
1008 |
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| Author |
Subrahmanyam, S.; Robinson, S. |
| Title |
Sea Surface Height Variability in the Indian Ocean from TOPEX/POSEIDON Altimetry and Model Simulations |
Type |
$loc['typeJournal Article'] |
| Year |
2000 |
Publication |
Marine Geodesy |
Abbreviated Journal |
Marine Geodesy |
| Volume |
23 |
Issue |
3 |
Pages |
167-195 |
| Keywords |
Kelvin And Rossby Waves; Eddies; Sea Level Variability |
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| ISSN |
0149-0419 |
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$loc['no'] |
| Call Number |
COAPS @ mfield @ |
Serial |
792 |
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| 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 |
$loc['typeJournal Article'] |
| Year |
2018 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
| Volume |
10 |
Issue |
10 |
Pages |
1633 |
| Keywords |
surface drifters; surface currents; HF Radar; STOKES DRIFT; SEA-SURFACE; WAVES; BREAKING; VALIDATION; TRANSPORT |
| Abstract |
Concurrent measurements by satellite tracked drifters of different hull and drogue configurations and coastal high-frequency radar reveal substantial differences in estimates of the near-surface velocity. These measurements are important for understanding and predicting material transport on the ocean surface as well as the vertical structure of the near-surface currents. These near-surface current observations were obtained during a field experiment in the northern Gulf of Mexico intended to test a new ultra-thin drifter design. During the experiment, thirty small cylindrical drifters with 5 cm height, twenty-eight similar drifters with 10 cm hull height, and fourteen drifters with 91 cm tall drogues centered at 100 cm depth were deployed within the footprint of coastal High-Frequency (HF) radar. Comparison of collocated velocity measurements reveals systematic differences in surface velocity estimates obtained from the different measurement techniques, as well as provides information on properties of the drifter behavior and near-surface shear. Results show that the HF radar velocity estimates had magnitudes significantly lower than the 5 cm and 10 cm drifter velocity of approximately 45% and 35%, respectively. The HF radar velocity magnitudes were similar to the drogued drifter velocity. Analysis of wave directional spectra measurements reveals that surface Stokes drift accounts for much of the velocity difference between the drogued drifters and the thin surface drifters except during times of wave breaking. |
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2072-4292 |
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$loc['no'] |
| Call Number |
COAPS @ rl18 @ |
Serial |
985 |
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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 |
$loc['typeJournal Article'] |
| Year |
2009 |
Publication |
Ocean Modelling |
Abbreviated Journal |
Ocean Modelling |
| Volume |
28 |
Issue |
4 |
Pages |
250-265 |
| Keywords |
Numerical models; Deep currents; Topographic waves; Numerical truncation error; Vertical discretization; Sigsbee Escarpment; Gulf of Mexico |
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| ISSN |
1463-5003 |
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$loc['no'] |
| Call Number |
COAPS @ mfield @ |
Serial |
399 |
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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 |
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$loc['typeJournal Article'] |
| Year |
2006 |
Publication |
Ocean Modelling |
Abbreviated Journal |
Ocean Modelling |
| Volume |
14 |
Issue |
1-2 |
Pages |
45-60 |
| Keywords |
numerical models; ocean mathematical models; topographic waves; double Kelvin waves; continental shelves; shelf waves |
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1463-5003 |
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ONR, NASA |
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$loc['no'] |
| Call Number |
COAPS @ mfield @ |
Serial |
443 |
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Spiesberger, J.L.; Hurlburt, H.E.; Johnson, M.; Keller, M.; Meyers, S.; O'Brien, J. |
| Title |
Acoustic thermometry data compared with two ocean models: the importance of Rossby waves and ENSO in modifying the ocean interior |
Type |
$loc['typeJournal Article'] |
| Year |
1998 |
Publication |
Dynamics of Atmospheres and Oceans |
Abbreviated Journal |
Dynamics of Atmospheres and Oceans |
| Volume |
26 |
Issue |
4 |
Pages |
209-240 |
| Keywords |
Rossby waves ENSO Ocean |
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0377-0265 |
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$loc['no'] |
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COAPS @ mfield @ |
Serial |
741 |
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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 |
$loc['typeJournal Article'] |
| Year |
2009 |
Publication |
Continental Shelf Research |
Abbreviated Journal |
Continental Shelf Research |
| Volume |
29 |
Issue |
1 |
Pages |
333-351 |
| Keywords |
Baroclinic motion; Topographic waves; Low-frequency internal waves; Hurricanes; Caribbean Sea |
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0278-4343 |
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NOAA, NASA |
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$loc['no'] |
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COAPS @ mfield @ |
Serial |
397 |
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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 |
$loc['typeJournal Article'] |
| Year |
2006 |
Publication |
Continental Shelf Research |
Abbreviated Journal |
Continental Shelf Research |
| Volume |
26 |
Issue |
1 |
Pages |
82-103 |
| Keywords |
seasonal circulation; gyres; coastally trapped waves; ENSO; Gulf of California |
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0278-4343 |
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$loc['no'] |
| Call Number |
COAPS @ mfield @ |
Serial |
442 |
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| Author |
Shinoda, T.; Kiladis, G.N.; Roundy, P.E. |
| Title |
Statistical representation of equatorial waves and tropical instability waves in the Pacific Ocean |
Type |
$loc['typeConference Article'] |
| Year |
2009 |
Publication |
Atmospheric Research |
Abbreviated Journal |
Atmospheric Research |
| Volume |
94 |
Issue |
1 |
Pages |
37-44 |
| Keywords |
Equatorial waves; Tropical instability waves; Tropical air-sea interaction |
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0169-8095 |
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$loc['no'] |
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COAPS @ mfield @ |
Serial |
381 |
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| Author |
Perrie, W.; Zhang, W.; Bourassa, M.; Shen, H.; Vachon, P.W. |
| Title |
Impact of Satellite Winds on Marine Wind Simulations |
Type |
$loc['typeJournal Article'] |
| Year |
2008 |
Publication |
Weather and Forecasting |
Abbreviated Journal |
Wea. Forecasting |
| Volume |
23 |
Issue |
2 |
Pages |
290-303 |
| Keywords |
Satellite observations; Data assimilation; Hurricanes; Waves, oceanic; Ocean modeling; Numerical analysis |
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| ISSN |
0882-8156 |
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NASA, OVWST |
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$loc['no'] |
| Call Number |
COAPS @ mfield @ |
Serial |
680 |
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