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Journal articles on the topic 'Stratification thermohaline'

Author: Grafiati

Published: 23 September 2022

Last updated: 28 January 2023

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1

Schladow, S. Geoffrey, Ellen Thomas, and Jeffrey R. Koseff. "The dynamics of intrusions into a thermohaline stratification." Journal of Fluid Mechanics 236 (March 1992): 127–65. http://dx.doi.org/10.1017/s002211209200137x.

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Physical and numerical experiments were performed for a linearly stratified heat—salt system, uniformly heated at one endwall. The initial stratification was in the diffusive sense. Intrusions formed at the heated endwall and propagated out into the interior fluid. Three classes of flow were identified, based upon the gravitational stability ratio, Rp, and a lateral stability parameter, R1, For R1 > 1, a vertical lengthscale for the initial intrusion thickness was developed which agreed well with that observed in the physical experiments. In all cases, a region of salt fingering developed d

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2

Gong, Ye-Jun, Ying-Ying Luo, and Jie-Min Zhan. "Three-dimensional buoyancy-driven convection structures in thermohaline stratification." AIP Advances 6, no. 4 (2016): 045303. http://dx.doi.org/10.1063/1.4946783.

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3

Gordon, Arnold L., and Julie L. McClean. "Thermohaline Stratification of the Indonesian Seas: Model and Observations*." Journal of Physical Oceanography 29, no. 2 (1999): 198–216. http://dx.doi.org/10.1175/1520-0485(1999)029<0198:tsotis>2.0.co;2.

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4

Radko, Timour. "Thermohaline layering on the microscale." Journal of Fluid Mechanics 862 (January 14, 2019): 672–95. http://dx.doi.org/10.1017/jfm.2018.976.

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A theoretical model is developed which illustrates the dynamics of layering instability, frequently realized in ocean regions with active fingering convection. Thermohaline layering is driven by the interplay between large-scale stratification and primary double-diffusive instabilities operating at the microscale – temporal and spatial scales set by molecular dissipation. This interaction is described by a combination of direct numerical simulations and an asymptotic multiscale model. The multiscale theory is used to formulate explicit and dynamically consistent flux laws, which can be readily

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5

Stein, M. "Impacts of "Storis" on the Thermohaline Stratification off West Greenland." Journal of Northwest Atlantic Fishery Science 43 (March 17, 2010): 1–12. http://dx.doi.org/10.2960/j.v43.m655.

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6

Wright, J., and W. Shyy. "Numerical simulation of unsteady convective intrusions in a thermohaline stratification." International Journal of Heat and Mass Transfer 39, no. 6 (1996): 1183–201. http://dx.doi.org/10.1016/0017-9310(95)00214-6.

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7

Morin, P., P. Le Corre, and J. Le Févre. "Assimilation Aand Regeneration of Nutrients off the West Coast of Brittany." Journal of the Marine Biological Association of the United Kingdom 65, no. 3 (1985): 677–95. http://dx.doi.org/10.1017/s0025315400052528.

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A high degree of variation in hydrographic conditions is found in the so-called Iroise Sea, within less than 100 km of the west coast of Brittany. Tidal current maximal velocity, especially, ranges there from about 0·5 knot to more than 8 knots (locally, near the island of Ushant), i.e. practically as wide a range as found over the whole of north-west European shelf seas. Pelagic ecosystems accordingly exhibit a high degree of variety, related not only to classical inshore-offshore gradients, but also to the extent of vertical mixing or stratification. Areas where different physical and biolog

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8

Radko, Timour. "Thermohaline layering in dynamically and diffusively stable shear flows." Journal of Fluid Mechanics 805 (September 16, 2016): 147–70. http://dx.doi.org/10.1017/jfm.2016.547.

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In this study we examine two-component shear flows that are stable with respect to Kelvin–Helmholtz and to double-diffusive instabilities individually. Our focus is on diffusively stratified ocean regions, where relatively warm and salty water masses are located below cool fresh ones. It is shown that such systems may be destabilized by the interplay between shear and thermohaline effects, caused by unequal molecular diffusivities of density components. Linear stability analysis suggests that parallel two-component flows can be unstable for Richardson numbers exceeding the critical value for n

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9

Arnon, A., J. S. Selker, and N. G. Lensky. "Thermohaline stratification and double diffusion diapycnal fluxes in the hypersaline Dead Sea." Limnology and Oceanography 61, no. 4 (2016): 1214–31. http://dx.doi.org/10.1002/lno.10285.

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10

Liblik, T., and U. Lips. "Variability of synoptic-scale quasi-stationary thermohaline stratification patterns in the Gulf of Finland in summer 2009." Ocean Science 8, no. 4 (2012): 603–14. http://dx.doi.org/10.5194/os-8-603-2012.

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Abstract. We present and analyze high-resolution observational data of thermohaline structure and currents acquired in the Gulf of Finland (Baltic Sea), using an autonomous buoy profiler and bottom-mounted acoustic Doppler current profiler during July–August 2009. Vertical profiles of temperature and salinity were measured in the upper 50-m layer with a 3 h time resolution, and vertical profiles of current velocity and direction were recorded with a 10 min time resolution. Although large temporal variations of vertical temperature and salinity distributions were revealed, it was possible to de

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11

Sijp, Willem P., and Matthew H. England. "Southern Hemisphere Westerly Wind Control over the Ocean's Thermohaline Circulation." Journal of Climate 22, no. 5 (2009): 1277–86. http://dx.doi.org/10.1175/2008jcli2310.1.

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Abstract The effect of the position of the Southern Hemisphere subpolar westerly winds (SWWs) on the thermohaline circulation (THC) of the World Ocean is examined. The latitudes of zero wind stress curl position exert a strong control on the distribution of overturning between basins in the Northern Hemisphere. A southward wind shift results in a stronger Atlantic THC and enhanced stratification in the North Pacific, whereas a northward wind shift leads to a significantly reduced Atlantic THC and the development of vigorous sinking (up to 1500-m depth) in the North Pacific. In other words, the

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12

Sayın, Erdem, and Canan Eronat. "The dynamics of İzmir Bay under the effects of wind and thermohaline forces." Ocean Science 14, no. 2 (2018): 285–92. http://dx.doi.org/10.5194/os-14-285-2018.

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Abstract. The dominant circulation pattern of İzmir Bay on the Aegean Sea coast of Turkey is studied taking into consideration the influence of wind and thermohaline forces. İzmir Bay is discussed by subdividing the bay into outer, middle and inner areas. Wind is the most important driving force in the İzmir coastal area. There are also thermohaline forces due to the existence of water types of different physical properties in the bay. In contrast to the two-layer stratification during summer, a homogeneous water column exists in winter. The free surface version of the Princeton model (Killwor

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13

Suárez, F., J. E. Aravena, M. B. Hausner, A. E. Childress, and S. W. Tyler. "Assessment of a vertical high-resolution distributed-temperature-sensing system in a shallow thermohaline environment." Hydrology and Earth System Sciences 15, no. 3 (2011): 1081–93. http://dx.doi.org/10.5194/hess-15-1081-2011.

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Abstract. In shallow thermohaline-driven lakes it is important to measure temperature on fine spatial and temporal scales to detect stratification or different hydrodynamic regimes. Raman spectra distributed temperature sensing (DTS) is an approach available to provide high spatial and temporal temperature resolution. A vertical high-resolution DTS system was constructed to overcome the problems of typical methods used in the past, i.e., without disturbing the water column, and with resistance to corrosive environments. This paper describes a method to quantitatively assess accuracy, precision

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14

Brown, Justin M., and Timour Radko. "Initiation of diffusive layering by time-dependent shear." Journal of Fluid Mechanics 858 (November 6, 2018): 588–608. http://dx.doi.org/10.1017/jfm.2018.790.

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The Arctic halocline is generally stable to the development of double-diffusive and dynamic instabilities – the two major sources of small-scale mixing in the mid-latitude oceans. Despite this, observations show the abundance of double-diffusive staircases in the Arctic Ocean, which suggests the presence of some destabilizing process facilitating the transition from smooth-gradient to layered stratification. Recent studies have shown that an instability can develop in such circumstances if weak static shear is present even when the flow is dynamically and diffusively stable. However, the impac

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15

Nilsson, Johan, Göran Broström, and Gösta Walin. "The Thermohaline Circulation and Vertical Mixing: Does Weaker Density Stratification Give Stronger Overturning?" Journal of Physical Oceanography 33, no. 12 (2003): 2781–95. http://dx.doi.org/10.1175/1520-0485(2003)033<2781:ttcavm>2.0.co;2.

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16

Bao, Ting, and Zhen (Leo) Liu. "Geothermal energy from flooded mines: Modeling of transient energy recovery with thermohaline stratification." Energy Conversion and Management 199 (November 2019): 111956. http://dx.doi.org/10.1016/j.enconman.2019.111956.

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17

Liblik, T., and U. Lips. "Short-term variations of thermohaline structure in the Gulf of Finland." Ocean Science Discussions 9, no. 2 (2012): 877–908. http://dx.doi.org/10.5194/osd-9-877-2012.

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Abstract. We present and analyze high-frequency observational data of thermohaline structure and currents acquired in the Gulf of Finland (Baltic Sea) using an autonomous buoy profiler and a bottom mounted acoustic Doppler current profiler in July–August 2009. Vertical profiles of temperature and salinity were measured in the upper 50-m layer with a time resolution of 3 h and vertical profiles of current velocity and direction were recorded with a time resolution of 10 min. Although high temporal variations of the vertical temperature and salinity distributions were revealed, it was possible t

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18

Johnston, T. M. Shaun, and Daniel L. Rudnick. "Observations of the Transition Layer." Journal of Physical Oceanography 39, no. 3 (2009): 780–97. http://dx.doi.org/10.1175/2008jpo3824.1.

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Abstract The transition layer is the poorly understood interface between the stratified, weakly turbulent interior and the strongly turbulent surface mixed layer. The transition layer displays elevated thermohaline variance compared to the interior and maxima in current shear, vertical stratification, and potential vorticity. A database of 91 916 km or 25 426 vertical profiles of temperature and salinity from SeaSoar, a towed vehicle, is used to define the transition layer thickness. Acoustic Doppler current measurements are also used, when available. Statistics of the transition layer thickne

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19

Gibson, John A. E. "The meromictic lakes and stratified marine basins of the Vestfold Hills, East Antarctica." Antarctic Science 11, no. 2 (1999): 175–92. http://dx.doi.org/10.1017/s0954102099000243.

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Thirty-four permanently stratified water bodies were identified in a survey of the Vestfold Hills. Of these, 21 were lakes, six were seasonally isolated marine basins (SIMBs), and seven were marine basins with year round connection to the open ocean. The basins varied markedly in salinity (4 g l−1 to 235 g l−1), temperature (−14°C to 24°C), depth (5 m to 110 m), area (3.6 ha to 146 ha) and surface level (−30 m to 29 m above sea level). The stratification in all the basins was maintained by increases in salinity. During winter, a thermohaline convection cell was present in all lakes and SIMBs d

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20

Yang, Yantao, Wenyuan Chen, Roberto Verzicco, and Detlef Lohse. "Multiple states and transport properties of double-diffusive convection turbulence." Proceedings of the National Academy of Sciences 117, no. 26 (2020): 14676–81. http://dx.doi.org/10.1073/pnas.2005669117.

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When fluid stratification is induced by the vertical gradients of two scalars with different diffusivities, double-diffusive convection (DDC) may occur and play a crucial role in mixing. Such a process exists in many natural and engineering environments. Especially in the ocean, DDC is omnipresent since the seawater density is affected by temperature and salinity. The most intriguing phenomenon caused by DDC is the thermohaline staircase, i.e., a stack of alternating well-mixed convection layers and sharp interfaces with very large gradients in both temperature and salinity. Here we investigat

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21

Bao, Ting, Han Cao, Yinghong Qin, Guosheng Jiang, and Zhen (Leo) Liu. "Critical insights into thermohaline stratification for geothermal energy recovery from flooded mines with mine water." Journal of Cleaner Production 273 (November 2020): 122989. http://dx.doi.org/10.1016/j.jclepro.2020.122989.

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22

Dyakonov, Gleb S., and Rashit A. Ibrayev. "Long-term evolution of Caspian Sea thermohaline properties reconstructed in an eddy-resolving ocean general circulation model." Ocean Science 15, no. 3 (2019): 527–41. http://dx.doi.org/10.5194/os-15-527-2019.

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Abstract. Decadal variability in Caspian Sea thermohaline properties is investigated using a high-resolution ocean general circulation model including sea ice thermodynamics and air–sea interaction forced by prescribed realistic atmospheric conditions and riverine runoff. The model describes synoptic, seasonal and climatic variations of sea thermohaline structure, water balance, and sea level. A reconstruction experiment was conducted for the period of 1961–2001, covering a major regime shift in the global climate during 1976–1978, which allowed for an investigation of the Caspian Sea response

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23

Suárez, F., J. E. Aravena, M. B. Hausner, A. E. Childress, and S. W. Tyler. "Assessment of a vertical high-resolution distributed-temperature-sensing system in a shallow thermohaline environment." Hydrology and Earth System Sciences Discussions 8, no. 1 (2011): 29–58. http://dx.doi.org/10.5194/hessd-8-29-2011.

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Abstract. In shallow thermohaline-driven lakes it is important to measure temperature on fine spatial and temporal scales to detect stratification or different hydrodynamic regimes. Raman spectra distributed temperature sensing (DTS) is an approach available to provide high spatial and temporal temperature resolution. A vertical high-resolution DTS system was constructed to overcome the problems of typical methods used in the past, i.e., without disturbing the water column, and with resistance to corrosive environments. This system monitors the temperature profile each 1.1 cm vertically and in

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24

Silva, Brenno J., Felipe L. Gaspar, Pedro Tyaquiçã, Nathalie Lefèvre, and Manuel J. Flores Montes. "Carbon chemistry variability around a tropical archipelago." Marine and Freshwater Research 70, no. 6 (2019): 767. http://dx.doi.org/10.1071/mf18011.

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Oceanic islands affect the surrounding oceanic circulation by producing upwelling or vortices, resulting in the rising of a richer and colder subsurface water mass. This process increases primary production and can change some biogeochemical processes, such as carbon chemistry and the biological pump. The aim of this study was to describe the vertical variability of carbon chemistry around Fernando de Noronha Archipelago (FNA) and to verify how the island mass effect (IME) can affect carbon distribution. Two transects on opposite sides of the FNA were established according to the direction of

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25

Zhou, S. Q., L. Qu, Y. Z. Lu, and X. L. Song. "The instability of diffusive convection and its implication for the thermohaline staircases in the deep Arctic Ocean." Ocean Science 10, no. 1 (2014): 127–34. http://dx.doi.org/10.5194/os-10-127-2014.

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Abstract. In the present study, the classical description of diffusive convection is updated to interpret the instability of diffusive interfaces and the dynamical evolution of the bottom layer in the deep Arctic Ocean. In the new consideration of convective instability, both the background salinity stratification and rotation are involved. The critical Rayleigh number of diffusive convection is found to vary from 103 to 1011 in the deep Arctic Ocean as well as in other oceans and lakes. In such a wide range of conditions, the interface-induced thermal Rayleigh number is shown to be consistent

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26

Zhou, S. Q., L. Qu, Y. Z. Lu, and X. L. Song. "The instability of diffusive convection and its implication for the thermohaline staircases in the deep Arctic Ocean." Ocean Science Discussions 10, no. 4 (2013): 1343–66. http://dx.doi.org/10.5194/osd-10-1343-2013.

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Abstract. In the present study, the classical description of diffusive convection is updated to interpret the instability of diffusive interfaces and the dynamical evolution of the bottom layer in the deep Arctic Ocean. In the new consideration of convective instability, both the background salinity stratification and rotation are involved. The critical Rayleigh number of diffusive convection is found to vary from 103 to 1011 in the deep Arctic Ocean as well as in other oceans and lakes. In such a wide range of conditions, the interface-induced thermal Rayleigh number is indicated to be consis

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27

Smith, K. Shafer, and Raffaele Ferrari. "The Production and Dissipation of Compensated Thermohaline Variance by Mesoscale Stirring." Journal of Physical Oceanography 39, no. 10 (2009): 2477–501. http://dx.doi.org/10.1175/2009jpo4103.1.

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Abstract Temperature–salinity profiles from the region studied in the North Atlantic Tracer Release Experiment (NATRE) show large isopycnal excursions at depths just below the thermocline. It is proposed here that these thermohaline filaments result from the mesoscale stirring of large-scale temperature and salinity gradients by geostrophic turbulence, resulting in a direct cascade of thermohaline variance to small scales. This hypothesis is investigated as follows: Measurements from NATRE are used to generate mean temperature, salinity, and shear profiles. The mean stratification and shear ar

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28

Miranda, Luiz Bruner de, Eugenio Dalle Olle, Alessandro Luvizon Bérgamo, Lourval dos Santos Silva, and Fernando Pinheiro Andutta. "Circulation and salt intrusion in the Piaçaguera Channel, Santos (SP)." Brazilian Journal of Oceanography 60, no. 1 (2012): 11–23. http://dx.doi.org/10.1590/s1679-87592012000100002.

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Analysis of thermohaline properties and currents sampled at an anchor station in the Piaçaguera Channel (Santos Estuary) in the austral winter was made in terms of tidal (neap and spring tidal cycles) and non-tidal conditions, with the objective to characterize the stratification, circulation and salt transport due to the fortnightly tidal modulation. Classical methods of observational data analysis of hourly and nearly synoptic observations and analytical simulations of nearly steady-state salinity and longitudinal velocity profiles were used. During the neap tidal cycle the flood (v<0) an

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29

Erbacher, Jochen, Brian T. Huber, Richard D. Norris, and Molly Markey. "Increased thermohaline stratification as a possible cause for an ocean anoxic event in the Cretaceous period." Nature 409, no. 6818 (2001): 325–27. http://dx.doi.org/10.1038/35053041.

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30

FERSHALOV, M. YU, D. V. STEPANOV, E. A. SHTRAIKHERT, V. V. FOMIN, V. E. NECHAYUK, and N. A. DIANSKY. "INFLUENCE OF THERMOHALINE STRATIFICATION ON THE EVOLUTION OF COASTAL UPWELLING ON THE NORTHEASTERN SHELF OF SAKHALIN." Meteorologiya i Gidrologiya, no. 9 (September 2022): 20–31. http://dx.doi.org/10.52002/0130-2906-2022-9-20-31.

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Satellite data on sea surface temperature and temperature and salinity profiles in the northeastern shelf of Sakhalin showed that during the periods of advection of warm and low-salinity water to the eastern shelf of Sakhalin, intensive coastal upwelling did not develop, even under favorable wind conditions. Regular deepening of the thermocline/halocline has prevented the rise of cold and salt water to the sea surface. Numerical experiments with the INMOM-JRA55-do model showed a significant deepening of the thermocline/halocline accompanied by the increasing density stratification, which preve

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31

Fershalov, M. Yu, D. V. Stepanov, E. A. Shtraikhert, V. V. Fomin, V. E. Nechayuk, and N. A. Diansky. "Influence of Thermohaline Stratification on the Evolution of Coastal Upwelling on the Northeastern Shelf of Sakhalin." Russian Meteorology and Hydrology 47, no. 9 (2022): 652–59. http://dx.doi.org/10.3103/s1068373922090023.

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32

Ballarotta, M., S. Falahat, L. Brodeau, and K. Döös. "On the glacial and inter-glacial thermohaline circulation and the associated transports of heat and freshwater." Ocean Science Discussions 11, no. 2 (2014): 979–1022. http://dx.doi.org/10.5194/osd-11-979-2014.

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Abstract. The change of the thermohaline circulation (THC) between the Last Glacial Maximum (LGM, &amp;approx; 21 kyr ago) and the present day climate are explored using an Ocean General Circulation Model and stream functions projected in various coordinates. Compared to the present day period, the LGM circulation is reorganised in the Atlantic Ocean, in the Southern Ocean and particularly in the abyssal ocean, mainly due to the different haline stratification. Due to stronger wind stress, the LGM tropical circulation is more vigorous than under modern conditions. Consequently, the maximum

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Kuzmina, Natalia, Bert Rudels, Tapani Stipa, and Victor Zhurbas. "The Structure and Driving Mechanisms of the Baltic Intrusions." Journal of Physical Oceanography 35, no. 6 (2005): 1120–37. http://dx.doi.org/10.1175/jpo2749.1.

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Abstract Data from closely spaced CTD profiling performed in the eastern Gotland Basin after the 1993 inflow event are used to study thermohaline intrusions in the Baltic Sea. Two CTD cross sections display abundant intrusive layers in the permanent halocline. Despite the overwhelming dominance of the salinity stratification, diffusive convection is shown to work in the Baltic halocline enhancing diapycnical mixing. To understand the driving mechanisms of observed intrusions, these are divided into different types depending on their structural features. Only two types of observed intrusions ar

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34

Radko, Timour. "Applicability and failure of the flux-gradient laws in double-diffusive convection." Journal of Fluid Mechanics 750 (May 30, 2014): 33–72. http://dx.doi.org/10.1017/jfm.2014.244.

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AbstractDouble-diffusive flux-gradient laws are commonly used to describe the development of large-scale structures driven by salt fingers – thermohaline staircases, collective instability waves and intrusions. The flux-gradient model assumes that the vertical transport is uniquely determined by the local background temperature and salinity gradients. While flux-gradient laws adequately capture mixing characteristics on scales that greatly exceed those of primary double-diffusive instabilities, their accuracy rapidly deteriorates when the scale separation between primary and secondary instabil

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Tarkhanova, Marina A., and Elena N. Golubeva. "NUMERICAL SIMULATION OF ARCTIC HALOCLINE FORMATION." Interexpo GEO-Siberia 4, no. 1 (2020): 83–90. http://dx.doi.org/10.33764/2618-981x-2020-4-1-83-90.

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This paper discusses issues related to the analysis of the Arctic halocline state over the past decades. Observational data show that the layer of halocline in the Arctic Ocean significantly changed in the last 40 years, which may affect the Arctic ice cover. For the study we used a three-dimensional ocean and sea ice numerical model developed at the ICMMG SB RAS. The main attention was devoted to the analysis of the model distribution of water salinity in the upper 250-meter layer and its variability. Based on numerical experiments on the sensitivity of thermohaline stratification to variatio

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Ménesguen, A., and T. Hoch. "Modelling the biogeochemical cycles of elements limiting primary production in the English Channel:I. Role of thermohaline stratification." Marine Ecology Progress Series 146 (1997): 173–88. http://dx.doi.org/10.3354/meps146173.

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Trusenkova, O. O., A. G. Ostrovskii, A. Y. Lazaryuk, and V. B. Lobanov. "Evolution of the Thermohaline Stratification in the Northwestern Sea of Japan: Mesoscale Variability and Intra-annual Fluctuations." Oceanology 61, no. 3 (2021): 319–28. http://dx.doi.org/10.1134/s0001437021030152.

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38

Bao, Ting, and Zhen (Leo) Liu. "Thermohaline stratification modeling in mine water via double-diffusive convection for geothermal energy recovery from flooded mines." Applied Energy 237 (March 2019): 566–80. http://dx.doi.org/10.1016/j.apenergy.2019.01.049.

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39

Luo, Yingying, and Yejun Gong. "Comparative study of buoyancy-driven instability for thermohaline stratification in a Hele-Shaw cell and extended geometry." Engineering Applications of Computational Fluid Mechanics 9, no. 1 (2015): 469–76. http://dx.doi.org/10.1080/19942060.2015.1066533.

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Luis, Alvarinho J. "Oceanographic features of the Indian Ocean sector of Coastal Antarctica (Short Communication)." Czech Polar Reports 10, no. 1 (2020): 110–17. http://dx.doi.org/10.5817/cpr2020-1-10.

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A review is presented on physical oceanographic features based on expendable CTD data collected in the Indian Ocean sector of the Southern Ocean. The thermohaline structure is dominated by Circumpolar Deep Water. The temperature and salinity are affected by cyclonic circulation in the Weddell Sea and Prydz Bay. High chlorophyll-a blooms (2-4 mg m-3) evolve during austral summer due to stratification which is caused by freshwater generated from the sea ice melt and the glacial outflow which traps phytoplankton in a shallow mixed layer, where they are exposed to higher irradiances of photosynthe

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Schrum, Corinna. "Thermohaline stratification and instabilities at tidal mixing fronts: results of an eddy resolving model for the German Bight." Continental Shelf Research 17, no. 6 (1997): 689–716. http://dx.doi.org/10.1016/s0278-4343(96)00051-9.

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42

Tarkhanova, Marina A., and Elena N. Golubeva. "CHANGES IN THE HYDROLOGICAL CHARACTERISTICS OF THE ARCTIC OCEAN UNDER THE INFLUENCE OF INCREASING RIVER RUNOFF." Interexpo GEO-Siberia 4, no. 1 (2021): 210–16. http://dx.doi.org/10.33764/2618-981x-2021-4-1-210-216.

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The paper considers issues related to the influence of increased Arctic river runoff on the formation of the thermohaline structure of waters outside the Arctic shelf and, in particular, on the variability of heat content of the deep Arctic Ocean. The study is carried out using the three-dimensional numerical model of the ocean and sea ice SibCIOM and atmospheric reanalysis data NCEP/NCAR. Numerical simulation results showed that increased flow of Arctic rivers contributes to the stability of water stratification outside the shelf areas, which reduces the depth of autumn-winter mixing and allo

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Karagiorgos, John, Vassilios Vervatis, and Sarantis Sofianos. "The Impact of Tides on the Bay of Biscay Dynamics." Journal of Marine Science and Engineering 8, no. 8 (2020): 617. http://dx.doi.org/10.3390/jmse8080617.

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The impact of tides on the Bay of Biscay dynamics is investigated by means of an ocean model twin-experiment, consisted of two simulations with and without tidal forcing. The study is based on a high-resolution (1/36∘) regional configuration of NEMO (Nucleus for European Modelling of the Ocean) performing one-year simulations. The results highlight the imprint of tides on the thermohaline properties and circulation patterns in three distinct dynamical areas in the model domain: the abyssal plain, the Armorican shelf and the English Channel. When tides are activated, the bottom stress is increa

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Yankovsky, Elizabeth, and Sonya Legg. "Symmetric and Baroclinic Instability in Dense Shelf Overflows." Journal of Physical Oceanography 49, no. 1 (2019): 39–61. http://dx.doi.org/10.1175/jpo-d-18-0072.1.

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AbstractIn this study, we revisit the problem of rotating dense overflow dynamics by performing nonhydrostatic numerical simulations, resolving submesoscale variability. Thermohaline stratification and buoyancy forcing are based on data from the Eurasian basin of the Arctic Ocean, where overflows are particularly crucial to the exchange of dense water between shelves and deep basins, yet have been studied relatively little. A nonlinear equation of state is used, allowing proper representation of thermohaline structure and mixing. We examine three increasingly complex scenarios: nonrotating 2D,

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Degtyareva, L. V., E. G. Lardygina, and D. V. Kashin. "The effect of thermohaline stratification of the Northern Caspian Sea waters on oxygen mode in the near-bottom layer." Environmental Protection in Oil and Gas Complex, no. 6 (2018): 23–28. http://dx.doi.org/10.30713/2411-7013-2018-6-23-28.

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Krasnodubets, L. A. "Multi-purpose information-measuring system for vertical profiling of the ocean environment." Monitoring systems of environment, no. 1 (March 25, 2021): 54–60. http://dx.doi.org/10.33075/2220-5861-2021-1-54-60.

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On the basis of a mathematical description of the processes of measuring the vertical profile of the density of the oceanic environment using a diving offshore autonomous probe – a profiler equipped with an onboard navigation system, a structure and a computer model of a multipurpose information-measuring system is proposed, which is intended for use in operational oceanology. The proposed system forms arrays of measurements of vertical profiles in situ of the density of seawater and its increment, as well as the speed of sound as functions of hydrostatic pressure, obtained during one sounding

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Campos, Edmo José Dias, Sueli Susana de Godói, Yoshimine Ikeda, Luis Vianna Nonato, and José E. Gonçalves. "Summertime thermohaline structure off the Brazil Current Region between Santos (SP) and Rio de Janeiro (RJ)." Boletim do Instituto Oceanográfico 42, no. 1-2 (1994): 01–18. http://dx.doi.org/10.1590/s0373-55241994000100001.

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Within the scope of the MAR-14 Project, part of the Brazil-Germany Bilateral Agreement in Marine Sciences, an oceanographic survey aboard the R/V Victor Hensen was carried out in Brazilian coastal waters between Santos (23º56'S) and Rio de Janeiro (22º54'S), from January 15 to January 22,1991. In this article we report results of preliminary analyses of the hydrographic data collected with CTD, STD, Nansen bottles and XBT's. These preliminary results show intense stratification in the first 200 m depth, and the penetration of the Brazil Current deep into the continental shelf region. Two eddy-

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Hosegood, P. J., M. C. Gregg, and M. H. Alford. "Restratification of the Surface Mixed Layer with Submesoscale Lateral Density Gradients: Diagnosing the Importance of the Horizontal Dimension." Journal of Physical Oceanography 38, no. 11 (2008): 2438–60. http://dx.doi.org/10.1175/2008jpo3843.1.

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Abstract A depth-cycling towed conductivity–temperature–depth (CTD) and vessel-mounted acoustic Doppler current profiler (ADCP) were used to obtain four-dimensional measurements of the restratification of the surface mixed layer (SML) at a submesoscale lateral density gradient near the subtropical front. With the objective of studying the role of horizontal processes in restratification, the thermohaline and velocity fields were monitored for 33 h by 16 small-scale (≤15 km2) surveys centered on a drogued float. Daytime warming by insolation caused a unidirectional displacement of the initially

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Krasnodubets, L. A. "Concept of using and modeling of a marine autonomous smart profiler." Monitoring systems of environment, no. 3 (September 24, 2020): 106–13. http://dx.doi.org/10.33075/2220-5861-2020-3-106-113.

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The article focuses on the development of technical support in terms of expanding the measuring base and improving marine profilers for operational observation systems as part of a new and developing scientific and applied field – operational oceanography. The concept of using a marine autonomous intelligent profiler for operational measurements of the thermohaline profile parameters of a stratified ocean environment with a significant reduction in the time to conduct an experiment using smart profiling is presented. At the same time, time savings are achieved due to the flexible control of th

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Cessi, Paola, and Maurizio Fantini. "The Eddy-Driven Thermocline." Journal of Physical Oceanography 34, no. 12 (2004): 2642–58. http://dx.doi.org/10.1175/jpo2657.1.

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Abstract The role of baroclinic eddies in transferring thermal gradients laterally, and thus determining the stratification of the ocean, is examined. The hypothesis is that the density differences imposed at the surface by differential heating are a source of available potential energy that can be partially released by mesocale eddies with horizontal scales on the order of 100 km. Eddy fluxes balance the diapycnal mixing of heat and thus determine the vertical scale of penetration of horizontal thermal gradients (i.e., the depth of the thermocline). This conjecture is in contrast with the cur

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