Records |
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 |
$loc['typeJournal Article'] |
Year |
2018 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
Volume |
10 |
Issue |
10 |
Pages |
1633 |
Keywords |
surface drifters; surface currents; HF Radar |
Abstract |
Concurrent measurements by satellite tracked drifters of different hull and drogue configurations and coastal high-frequency radar reveal substantial differences in estimates of the near-surface velocity. These measurements are important for understanding and predicting material transport on the ocean surface as well as the vertical structure of the near-surface currents. These near-surface current observations were obtained during a field experiment in the northern Gulf of Mexico intended to test a new ultra-thin drifter design. During the experiment, thirty small cylindrical drifters with 5 cm height, twenty-eight similar drifters with 10 cm hull height, and fourteen drifters with 91 cm tall drogues centered at 100 cm depth were deployed within the footprint of coastal High-Frequency (HF) radar. Comparison of collocated velocity measurements reveals systematic differences in surface velocity estimates obtained from the different measurement techniques, as well as provides information on properties of the drifter behavior and near-surface shear. Results show that the HF radar velocity estimates had magnitudes significantly lower than the 5 cm and 10 cm drifter velocity of approximately 45% and 35%, respectively. The HF radar velocity magnitudes were similar to the drogued drifter velocity. Analysis of wave directional spectra measurements reveals that surface Stokes drift accounts for much of the velocity difference between the drogued drifters and the thin surface drifters except during times of wave breaking. |
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2072-4292 |
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$loc['no'] |
Call Number |
COAPS @ rl18 @ |
Serial |
987 |
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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 |
Morey, S.L.; Baig, S.; Bourassa, M.A.; Dukhovskoy, D.S.; O'Brien, J.J. |
Title |
Remote forcing contribution to storm-induced sea level rise during Hurricane Dennis |
Type |
$loc['typeJournal Article'] |
Year |
2006 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
Geophys. Res. Lett. |
Volume |
33 |
Issue |
19 |
Pages |
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ISSN |
0094-8276 |
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Funding |
NOAA, NASA, OVWST |
Approved |
$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
433 |
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Author |
Morey, S.L.; Bourassa, M.A.; Dukhovskoy, D.S.; O'Brien, J.J. |
Title |
Modeling studies of the upper ocean response to a tropical cyclone |
Type |
$loc['typeJournal Article'] |
Year |
2006 |
Publication |
Ocean Dynamics |
Abbreviated Journal |
Ocean Dynamics |
Volume |
56 |
Issue |
5-6 |
Pages |
594-606 |
Keywords |
air-sea interaction; tropical cyclones; ocean modeling; air-sea fluxes |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1616-7341 |
ISBN |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
432 |
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Author |
Morey, S.L.; Dukhovskoy, D.S. |
Title |
A downscaling method for simulating deep current interactions with topography – Application to the Sigsbee Escarpment |
Type |
$loc['typeJournal Article'] |
Year |
2013 |
Publication |
Ocean Modelling |
Abbreviated Journal |
Ocean Modelling |
Volume |
69 |
Issue |
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Pages |
50-63 |
Keywords |
Ocean modeling; Model nesting; Topographic flows; USA; Gulf of Mexico; Sigsbee Escarpment |
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Edition |
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ISSN |
1463-5003 |
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Funding |
DeepStar, HYCOM Consortium |
Approved |
$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
183 |
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Author |
Morey, S.L.; Dukhovskoy, D.S. |
Title |
Analysis Methods for Characterizing Salinity Variability from Multivariate Time Series Applied to the Apalachicola Bay Estuary |
Type |
$loc['typeJournal Article'] |
Year |
2012 |
Publication |
Journal of Atmospheric and Oceanic Technology |
Abbreviated Journal |
J. Atmos. Oceanic Technol. |
Volume |
29 |
Issue |
4 |
Pages |
613-628 |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0739-0572 |
ISBN |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
253 |
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Author |
Morey, S.L.; Dukhovskoy, D.S.; Bourassa, M.A. |
Title |
Connectivity of the Apalachicola River flow variability and the physical and bio-optical oceanic properties of the northern West Florida Shelf |
Type |
$loc['typeJournal Article'] |
Year |
2009 |
Publication |
Continental Shelf Research |
Abbreviated Journal |
Continental Shelf Research |
Volume |
29 |
Issue |
9 |
Pages |
1264-1275 |
Keywords |
River plumes; Climate variability; Ocean color; West Florida Shelf; Apalachicola River |
Abstract |
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Edition |
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ISSN |
0278-4343 |
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Funding |
NASA, OVWST |
Approved |
$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
393 |
Permanent link to this record |
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Author |
Morey, SL; Dukhovskoy, DS |
Title |
A Multi-Model Nesting Approach for Simulating Deep Ocean Dynamics and Topographic Interactions |
Type |
$loc['typeConference Article'] |
Year |
2011 |
Publication |
OCEANS 2011 |
Abbreviated Journal |
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Medium |
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Area |
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Conference |
MTS/IEEE OCEANS Conference |
Funding |
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Approved |
$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
316 |
Permanent link to this record |
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Author |
Morrison, T.; Dukhovskoy, D. S.; McClean, J.; Gille, S. T.; Chassignet, E. |
Title |
Causes of the anomalous heat flux onto the Greenland continental shelf |
Type |
$loc['typeAbstract'] |
Year |
2018 |
Publication |
American Geophysical Union |
Abbreviated Journal |
AGU |
Volume |
Fall Meeting |
Issue |
|
Pages |
|
Keywords |
0726 Ice sheets, CRYOSPHEREDE: 4207 Arctic and Antarctic oceanography, OCEANOGRAPHY: GENERALDE: 4215 Climate and interannual variability, OCEANOGRAPHY: GENERALDE: 4255 Numerical modeling, OCEANOGRAPHY: GENERAL |
Abstract |
On the continental shelf around Greenland, warm-salty Atlantic water at depth fills the deep narrow fjords where Greenland's tidewater glaciers terminate. Changes in the quantity or properties of this water mass starting in the mid 1990s is thought to be largely responsible for increased ocean-driven melting of the Greenland Ice Sheet. Using high-resolution (nominal 0.1-degree) ocean circulation models we cannot accurately resolve small-scale processes on the shelf or within fjords. However, we can assess changes in the flux of heat via Atlantic water onto the continental shelf. To understand the causes of the anomalous heat that has reached the shelf we examine heat content of subtropical gyre water and shifts in the North Atlantic and Atlantic Multidecadal Oscillations.
We compare changes in heat transport in two eddy permitting simulations: a global 0.1 degree (5-7km around Greenland) resolution coupled hindcast (1970-2009) simulation of the Parallel Ocean Program (POP) and a regional 0.08 degree (3-5km around Greenland) resolution coupled HYbrid Coordinate Ocean Model (HYCOM) hindcast (1993-2016) simulation. Both models are coupled to the Los Alamos National Laboratory Community Ice CodE version 4 and forced by atmospheric reanalysis fluxes. In both models we look for processes that could explain the increase in heat; processes that are present in both are likely to be robust causes of warming. |
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$loc['no'] |
Call Number |
COAPS @ user @ |
Serial |
1009 |
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Author |
Nedbor-Gross, R.; Dukhovskoy, D.S.; Bourassa, M.A.; Morey, S.L.; Chassignet, E.P. |
Title |
Investigation of the Relationship Between the Yucatan Channel Transport and the Loop Current Area in a Multidecadal Numerical Simulation |
Type |
$loc['typeJournal Article'] |
Year |
2014 |
Publication |
Marine Technology Society Journal |
Abbreviated Journal |
Mar Technol Soc J |
Volume |
48 |
Issue |
4 |
Pages |
15-26 |
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Series Editor |
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Edition |
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ISSN |
0025-3324 |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
145 |
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