Records |
Author |
Bashmachnikov, I.L.; Fedorov, A.M.; Vesman, A.V.; Belonenko, T.V.; Dukhovskoy, D.S. |
Title |
Thermohaline convection in the subpolar seas of the North Atlantic from satellite and in situ observations. Part 2: indices of intensity of deep convection |
Type |
$loc['typeJournal Article'] |
Year |
2019 |
Publication |
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Abbreviated Journal |
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Volume |
16 |
Issue |
1 |
Pages |
191-201 |
Keywords |
deep convection, assimilation of satellite data, altimetry, water density, the Greenland Sea, the Labrador Sea, the Irminger Sea |
Abstract |
Variation in locations of the maximum development of deep convection in the subpolar seas, taking into account their small dimensions, represent difficulty in identifying its interannual variability from usually sparse in situ data. In this work, the interannual variability of the maximum convection depth, is obtained using one of the most complete datasets ARMOR, which combines in situ and satellite data. The convection depths, derived from ARMOR, are used for testing the efficiency of two indices of convection intensity: (1) sea-level anomalies from satellite altimetry and (2) the integral water density in the areas of the most frequent development of deep convection. The first index, capturing some details, shows low correlations with the interannual variability of the deep convection intensity. The second index shows high correlation with the deep convection intensity in the Greenland, Irminger and Labrador seas. Asynchronous variations in the deep convection intensity in the Labrador-Irminger seas and in the Greenland Sea are obtained. In the Labrador and in the Irminger seas, the quasi-seven-year variations in the convection intensity are identified. |
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$loc['no'] |
Call Number |
COAPS @ user @ |
Serial |
1089 |
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Author |
Dukhovskoy, D.S.; Yashayaev, I.; Proshutinsky, A.; Bamber, J.L.; Bashmachnikov, I.L.; Chassignet, E.P.; Lee, C.M.; Tedstone, A.J. |
Title |
Role of Greenland Freshwater Anomaly in the Recent Freshening of the Subpolar North Atlantic |
Type |
$loc['typeJournal Article'] |
Year |
2019 |
Publication |
Journal of Geophysical Research: Oceans |
Abbreviated Journal |
J. Geophys. Res. Oceans |
Volume |
124 |
Issue |
5 |
Pages |
3333-3360 |
Keywords |
Greenland ice sheet melting; freshwater anomaly; subpolar North Atlantic; subpolar gyre; passive tracer numerical experiment; freshwater budget |
Abstract |
The cumulative Greenland freshwater flux anomaly has exceeded 5000 km3 since the 1990s. The volume of this surplus fresh water is expected to cause substantial freshening in the North Atlantic. Analysis of hydrographic observations in the subpolar seas reveal freshening signals in the 2010s. The sources of this freshening are yet to be determined. In this study, the relationship between the surplus Greenland freshwater flux and this freshening is tested by analyzing the propagation of the Greenland freshwater anomaly and its impact on salinity in the subpolar North Atlantic based on observational data and numerical experiments with and without the Greenland runoff. A passive tracer is continuously released during the simulations at freshwater sources along the coast of Greenland to track the Greenland freshwater anomaly. Tracer budget analysis shows that 44% of the volume of the Greenland freshwater anomaly is retained in the subpolar North Atlantic by the end of the simulation. This volume is sufficient to cause strong freshening in the subpolar seas if it stays in the upper 50�100 m. However, in the model the anomaly is mixed down to several hundred meters of the water column resulting in smaller magnitudes of freshening compared to the observations. Therefore, the simulations suggest that the accelerated Greenland melting would not be sufficient to cause the observed freshening in the subpolar seas and other sources of fresh water have contributed to the freshening. Impacts on salinity in the subpolar seas of the freshwater transport through Fram Strait and precipitation are discussed. |
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2169-9275 |
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$loc['no'] |
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COAPS @ user @ |
Serial |
1029 |
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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 |
$loc['typeJournal Article'] |
Year |
2014 |
Publication |
Marine Technology Society Journal |
Abbreviated Journal |
Mar Technol Soc J |
Volume |
48 |
Issue |
4 |
Pages |
15-26 |
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0025-3324 |
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$loc['no'] |
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COAPS @ mfield @ |
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145 |
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Author |
Hiester, H.R.; Morey, S.L.; Dukhovskoy, D.S.; Chassignet, E.P.; Kourafalou, V.H.; Hu, C. |
Title |
A topological approach for quantitative comparisons of ocean model fields to satellite ocean color data |
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$loc['typeJournal Article'] |
Year |
2016 |
Publication |
Methods in Oceanography |
Abbreviated Journal |
Methods in Oceanography |
Volume |
17 |
Issue |
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Pages |
232-250 |
Keywords |
Satellite data; Ocean model; Ocean color; Sea surface salinity; Shape comparison; Hausdorff distance |
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2211-1220 |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
78 |
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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 |
$loc['typeJournal Article'] |
Year |
2013 |
Publication |
Ocean Modelling |
Abbreviated Journal |
Ocean Modelling |
Volume |
69 |
Issue |
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Pages |
50-63 |
Keywords |
Ocean modeling; Model nesting; Topographic flows; USA; Gulf of Mexico; Sigsbee Escarpment |
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1463-5003 |
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DeepStar, HYCOM Consortium |
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$loc['no'] |
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COAPS @ mfield @ |
Serial |
183 |
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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 |
$loc['typeJournal Article'] |
Year |
2009 |
Publication |
Ocean Modelling |
Abbreviated Journal |
Ocean Modelling |
Volume |
28 |
Issue |
4 |
Pages |
250-265 |
Keywords |
Numerical models; Deep currents; Topographic waves; Numerical truncation error; Vertical discretization; Sigsbee Escarpment; Gulf of Mexico |
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1463-5003 |
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$loc['no'] |
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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'] |
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COAPS @ mfield @ |
Serial |
443 |
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Author |
Dukhovskoy, D.S.; Leben, R.R.; Chassignet, E.P.; Hall, C.A.; Morey, S.L.; Nedbor-Gross, R. |
Title |
Characterization of the uncertainty of loop current metrics using a multidecadal numerical simulation and altimeter observations |
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$loc['typeJournal Article'] |
Year |
2015 |
Publication |
Deep Sea Research Part I: Oceanographic Research Papers |
Abbreviated Journal |
Deep Sea Research Part I: Oceanographic Research Papers |
Volume |
100 |
Issue |
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Pages |
140-158 |
Keywords |
Eddies and mesoscale processes; Gulf of Mexico; Loop Current; Satellite altimetry; Ocean modeling; Ocean front detection |
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0967-0637 |
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$loc['no'] |
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COAPS @ mfield @ |
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100 |
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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 |
$loc['typeJournal Article'] |
Year |
2009 |
Publication |
Continental Shelf Research |
Abbreviated Journal |
Continental Shelf Research |
Volume |
29 |
Issue |
9 |
Pages |
1264-1275 |
Keywords |
River plumes; Climate variability; Ocean color; West Florida Shelf; Apalachicola River |
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0278-4343 |
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NASA, OVWST |
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$loc['no'] |
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COAPS @ mfield @ |
Serial |
393 |
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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 |
$loc['typeJournal Article'] |
Year |
2009 |
Publication |
Continental Shelf Research |
Abbreviated Journal |
Continental Shelf Research |
Volume |
29 |
Issue |
1 |
Pages |
333-351 |
Keywords |
Baroclinic motion; Topographic waves; Low-frequency internal waves; Hurricanes; Caribbean Sea |
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0278-4343 |
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NOAA, NASA |
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$loc['no'] |
Call Number |
COAPS @ mfield @ |
Serial |
397 |
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