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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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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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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0149-0419
ISBN Medium
Area Expedition Conference
Funding Approved $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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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-4292
ISBN Medium
Area Expedition Conference
Funding Approved $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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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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 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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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
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 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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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0377-0265
ISBN Medium
Area Expedition Conference
Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 741
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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
Abstract
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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 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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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0278-4343
ISBN Medium
Area Expedition Conference
Funding Approved $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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Language Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 0169-8095
ISBN Medium
Area Expedition Conference
Funding Approved $loc['no']
Call Number 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
Abstract
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0882-8156
ISBN Medium
Area Expedition Conference
Funding NASA, OVWST
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 680
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