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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 Abbreviated Journal
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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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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ISSN 2169-9275
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Call Number COAPS @ user @
Serial 1029
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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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Language Summary Language Original Title
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ISSN 0025-3324
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Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 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 Type $loc['typeJournal Article']
Year 2016 Publication Methods in Oceanography Abbreviated Journal Methods in Oceanography
Volume 17
Issue Pages 232-250
Keywords Satellite data ; Ocean model ; Ocean color ; Sea surface salinity ; Shape comparison ; Hausdorff distance
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Series Volume Series Issue Edition
ISSN 2211-1220
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Area Expedition Conference
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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 Pages 50-63
Keywords Ocean modeling ; Model nesting ; Topographic flows ; USA ; Gulf of Mexico ; Sigsbee Escarpment
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ISSN 1463-5003
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Area Expedition Conference
Funding DeepStar, HYCOM Consortium
Approved $loc['no']
Call Number 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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ISSN 1463-5003
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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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ISSN 1463-5003
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Funding ONR, NASA
Approved $loc['no']
Call Number 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 Type $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 Pages 140-158
Keywords Eddies and mesoscale processes ; Gulf of Mexico ; Loop Current ; Satellite altimetry ; Ocean modeling ; Ocean front detection
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ISSN 0967-0637
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Call Number COAPS @ mfield @
Serial 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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Series Volume Series Issue Edition
ISSN 0278-4343
ISBN Medium
Area Expedition Conference
Funding NASA, OVWST
Approved $loc['no']
Call Number 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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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
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Area Expedition Conference
Funding NOAA, NASA
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Call Number COAPS @ mfield @
Serial 397
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