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Journal articles on the topic 'Thermohaline variables'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Döös, Kristofer, Johan Nilsson, Jonas Nycander, Laurent Brodeau, and Maxime Ballarotta. "The World Ocean Thermohaline Circulation*." Journal of Physical Oceanography 42, no. 9 (2012): 1445–60. http://dx.doi.org/10.1175/jpo-d-11-0163.1.

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Abstract A new global streamfunction is presented and denoted the thermohaline streamfunction. This is defined as the volume transport in terms of temperature and salinity (hence no spatial variables). The streamfunction is used to analyze and quantify the entire World Ocean conversion rate between cold/warm and fresh/saline waters. It captures two main cells of the global thermohaline circulation, one corresponding to the conveyor belt and one corresponding to the shallow tropical circulation. The definition of a thermohaline streamfunction also enables a new method of estimating the turnover

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2

Taboada, J. J., and M. N. Lorenzo. "Effects of the synoptic scale variability on the thermohaline circulation." Nonlinear Processes in Geophysics 12, no. 4 (2005): 435–39. http://dx.doi.org/10.5194/npg-12-435-2005.

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Abstract. In this paper the effect of the synoptic scale variability is analyzed using a simple atmosphere-ocean coupled model. This high frequency variability has been taken into account in the model adding white gaussian noise in variables related to zonal and meridional temperature differences. Results show that synoptic scale frequency variability on longitudinal heating contrast between land and sea can produce a collapse of thermohaline circulation when a threshold of noise is overcome. This result is significant because if synoptic scale variability in the next century increases due to

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3

Lucarini, Valerio, and Peter H. Stone. "Thermohaline Circulation Stability: A Box Model Study. Part I: Uncoupled Model." Journal of Climate 18, no. 4 (2005): 501–13. http://dx.doi.org/10.1175/jcli-3278.1.

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Abstract A thorough analysis of the stability of the uncoupled Rooth interhemispheric three-box model of thermohaline circulation (THC) is presented. The model consists of a northern high-latitude box, a tropical box, and a southern high-latitude box, which correspond to the northern, tropical, and southern Atlantic Ocean, respectively. Restoring boundary conditions are adopted for the temperature variables, and flux boundary conditions are adopted for the salinity variables. This paper examines how the strength of THC changes when the system undergoes forcings that are analogous to those of g

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Kaabar, Mohammed K. A., Francisco Martínez, Inmaculada Martínez, Zailan Siri, and Silvestre Paredes. "Novel Investigation of Multivariable Conformable Calculus for Modeling Scientific Phenomena." Journal of Mathematics 2021 (November 23, 2021): 1–12. http://dx.doi.org/10.1155/2021/3670176.

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New investigation on the conformable version (CoV) of multivariable calculus is proposed. The conformable derivative (CoD) of a real-valued function (RVF) of several variables (SVs) and all related properties are investigated. An extension to vector-valued functions (VVFs) of several real variables (SRVs) is studied in this work. The CoV of chain rule (CR) for functions of SVs is also introduced. At the end, the CoV of implicit function theorem (IFThm) for SVs is established. All results in this work can be potentially applied in studying various modeling scenarios in physical oceanography suc

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5

Obata, Atsushi. "Climate–Carbon Cycle Model Response to Freshwater Discharge into the North Atlantic." Journal of Climate 20, no. 24 (2007): 5962–76. http://dx.doi.org/10.1175/2007jcli1808.1.

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Abstract The response of a coupled climate–carbon cycle model to discharge of freshwater into the North Atlantic is investigated with regard to cold reversals caused by meltwater from northern continental ice sheets such as the Younger Dryas during the last deglaciation. The extreme case in which the North Atlantic thermohaline circulation ceases in several decades is discussed. In the preindustrial case, northern severe cooling is reproduced by the collapse of the Atlantic northward heat transport, and land carbon decreases because of a decrease in net primary production (NPP) by the cooling

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6

Meunier, Thomas, Paula Pérez-Brunius, and Amy Bower. "Reconstructing the Three-Dimensional Structure of Loop Current Rings from Satellite Altimetry and In Situ Data Using the Gravest Empirical Modes Method." Remote Sensing 14, no. 17 (2022): 4174. http://dx.doi.org/10.3390/rs14174174.

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The three-dimensional structure of Gulf of Mexico’s warm-core rings, detaching from the Loop Current, is investigated using satellite altimetry and a large set of ARGO float profiles. Reconstruction of the Loop Current rings (LCRs) vertical structure from sea surface height observations is made possible by the use of the gravest empirical modes method (GEM). The GEMs are transfer functions that associate a value of temperature and salinity for each variable pair {dynamic height; pressure}, and are computed by estimating an empirical relationship between dynamic height and the vertical thermoha

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7

Ospina-Alvarez, N., and al. et. "Oceanographical patterns during a summer upwelling-downwelling event in the Northern Galician Rias." Continental Shelf Research 30 (January 1, 2010): 1362–72. https://doi.org/10.1016/j.csr.2010.04.018.

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Ospina-Alvarez N, Prego R, Alvarez I, deCastro M, Alvarez-Ossorio MT, Pazos Y, Campos M, Bernardez P, Garcia-Soto C, Gomez- Gesteira M, Varela M (2010) Oceanographical patterns during a summer upwelling-downwelling event in the Northern Galician Rias. Comparison with the whole ria system (NW of Iberian Peninsula). Continental Shelf Research 30:1362–1372 

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8

de Pablo, Hilda, João Sobrinho, Mariangel Garcia, Francisco Campuzano, Manuela Juliano, and Ramiro Neves. "Validation of the 3D-MOHID Hydrodynamic Model for the Tagus Coastal Area." Water 11, no. 8 (2019): 1713. http://dx.doi.org/10.3390/w11081713.

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The hydrodynamics of the TagusROFI (Regions of Freshwater Influence) is affected by the coastal upwelling, the estuarine tidal flow, the thermohaline circulation that is modulated by the Tagus freshwater discharge, and by its complex bathymetry. The use of numerical models is the best way to explain the processes that characterize this region. These models are also crucial to answer important scientific and management questions. Nevertheless, the robustness of the products derived from models depend on their accuracy and therefore models must be validated to determine the uncertainty associate

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9

Glowacki, Oskar, and Grant B. Deane. "Quantifying iceberg calving fluxes with underwater noise." Cryosphere 14, no. 3 (2020): 1025–42. http://dx.doi.org/10.5194/tc-14-1025-2020.

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Abstract. Accurate estimates of calving fluxes are essential in understanding small-scale glacier dynamics and quantifying the contribution of marine-terminating glaciers to both eustatic sea-level rise (SLR) and the freshwater budget of polar regions. Here we investigate the application of acoustical oceanography to measure calving flux using the underwater sounds of iceberg–water impact. A combination of time-lapse photography and passive acoustics is used to determine the relationship between the mass and impact noise of 169 icebergs generated by subaerial calving events from Hansbreen, Sva

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10

Vannitsem, Stéphane, and Pierre Ekelmans. "Causal dependences between the coupled ocean–atmosphere dynamics over the tropical Pacific, the North Pacific and the North Atlantic." Earth System Dynamics 9, no. 3 (2018): 1063–83. http://dx.doi.org/10.5194/esd-9-1063-2018.

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Abstract. The causal dependences (in a dynamical sense) between the dynamics of three different coupled ocean–atmosphere basins, the North Atlantic, the North Pacific and the tropical Pacific region (Nino3.4), have been explored using data from three reanalysis datasets, namely ORA-20C, ORAS4 and ERA-20C. The approach is based on convergent cross mapping (CCM) developed by Sugihara et al. (2012) that allows for evaluating the dependences between variables beyond the classical teleconnection patterns based on correlations. The use of CCM on these data mostly reveals that (i) the tropical Pacifi

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11

Denamiel, Cléa, Petra Pranić, Damir Ivanković, Iva Tojčić, and Ivica Vilibić. "Performance of the Adriatic Sea and Coast (AdriSC) climate component – a COAWST V3.3-based coupled atmosphere–ocean modelling suite: atmospheric dataset." Geoscientific Model Development 14, no. 6 (2021): 3995–4017. http://dx.doi.org/10.5194/gmd-14-3995-2021.

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Abstract. In this evaluation study, the coupled atmosphere–ocean Adriatic Sea and Coast (AdriSC) climate model, which was implemented to carry out 31-year evaluation and climate projection simulations in the Adriatic and northern Ionian seas, is briefly presented. The kilometre-scale AdriSC atmospheric results, derived with the Weather Research and Forecasting (WRF) 3 km model for the 1987–2017 period, are then thoroughly compared to a comprehensive publicly and freely available observational dataset. The evaluation shows that overall, except for the summer surface temperatures, which are syst

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12

Alvarez, I., N. Ospina-Alvarez, M. deCastro, M. Varela, M. Gomez-Gesteira, and R. Prego. "Poleward intrusion in the northern Galician shel." Estuarine, Coastal and Shelf Science 87 (January 1, 2010): 545–52. https://doi.org/10.1016/j.ecss.2010.02.009.

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13

Baines, Peter G., and Chris K. Folland. "Evidence for a Rapid Global Climate Shift across the Late 1960s." Journal of Climate 20, no. 12 (2007): 2721–44. http://dx.doi.org/10.1175/jcli4177.1.

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Abstract It is shown that a number of important characteristics of the global atmospheric circulation and climate changed in a near-monotonic fashion over the decade, or less, centered on the late 1960s. These changes were largest or commonest in tropical regions, the Southern Hemisphere, and the Atlantic sector of the Northern Hemisphere. Some, such as the decrease in rainfall in the African Sahel, are well known. Others appear to be new, but their combined extent is global and dynamical linkages between them are evident. The list of affected variables includes patterns of SST; tropical rainf

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14

Assunção, Ramilla, Anne Lebourges-Dhaussy, Alex C. da Silva, et al. "Fine-scale vertical relationships between environmental conditions and sound scattering layers in the Southwestern Tropical Atlantic." PLOS ONE 18, no. 8 (2023): e0284953. http://dx.doi.org/10.1371/journal.pone.0284953.

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Ocean dynamics initiate the structure of nutrient income driving primary producers, and these, in turn, shape the distribution of subsequent trophic levels until the whole pelagic community reflects the physicochemical structure of the ocean. Despite the importance of bottom-up structuring in pelagic ecosystems, fine-scale studies of biophysical interactions along depth are scarce and challenging. To improve our understanding of such relationships, we analyzed the vertical structure of key oceanographic variables along with the distribution of acoustic biomass from multi-frequency acoustic dat

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15

Tailleux, Rémi. "Spiciness theory revisited, with new views on neutral density, orthogonality, and passiveness." Ocean Science 17, no. 1 (2021): 203–19. http://dx.doi.org/10.5194/os-17-203-2021.

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Abstract. This paper clarifies the theoretical basis for constructing spiciness variables optimal for characterising ocean water masses. Three essential ingredients are identified: (1) a material density variable γ that is as neutral as feasible, (2) a material state function ξ independent of γ but otherwise arbitrary, and (3) an empirically determined reference function ξr(γ) of γ representing the imagined behaviour of ξ in a notional spiceless ocean. Ingredient (1) is required because contrary to what is often assumed, it is not the properties imposed on ξ (such as orthogonality) that determ

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16

Slizhe, M. O., N. A. Berlinskyi, and Y. El Hadri. "MESOSCALE EDDIES OF THE BRAZIL-MALVINAS CONFLUENCE ZONE AND THEIR INFLUENCE ON THE FORMATION OF THE SEA SURFACE TEMPERATURE FIELDS." Odesa National University Herald. Geography and Geology 29, no. 1(44) (2024): 44–56. http://dx.doi.org/10.18524/2303-9914.2024.1(44).305369.

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Problem Statement and Purpose. The Brazil-Malvinas Confluence zone is one of the productive zones of the World Ocean. The mixing of the warm tropical waters of the Brazilian Current with the cold subantarctic waters of the Malvina Current leads to the formation of layers of water with different thermohaline characteristics, and this alternation in combination with the action of mesoscale and submesoscale eddies leads to an increased growth of phytoplankton, which is not only one of the main suppliers of oxygen to the atmosphere and a source of food for marine inhabitants, but it can also have

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17

Edwards, Neil R., and John G. Shepherd. "Multiple thermohaline states due to variable diffusivity in a hierarchy of simple models." Ocean Modelling 3, no. 1-2 (2001): 67–94. http://dx.doi.org/10.1016/s1463-5003(01)00002-6.

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18

Aricò, Costanza, and Tullio Tucciarelli. "The MAST FV/FE scheme for the simulation of two-dimensional thermohaline processes in variable-density saturated porous media." Journal of Computational Physics 228, no. 4 (2009): 1234–74. http://dx.doi.org/10.1016/j.jcp.2008.10.015.

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19

Qi, Jifeng, Bowen Xie, Delei Li, Jianwei Chi, Baoshu Yin, and Guimin Sun. "Estimating thermohaline structures in the tropical Indian Ocean from surface parameters using an improved CNN model." Frontiers in Marine Science 10 (April 24, 2023). http://dx.doi.org/10.3389/fmars.2023.1181182.

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Accurately estimating the ocean’s subsurface thermohaline structure is essential for advancing our understanding of regional and global ocean dynamics. In this study, we propose a novel neural network model based on Convolutional Block Attention Module-Convolutional Neural Network (CBAM-CNN) to simultaneously estimate the ocean subsurface thermal structure (OSTS) and ocean subsurface salinity structure (OSSS) in the tropical Indian Ocean using satellite observations. The input variables include sea surface temperature (SST), sea surface salinity (SSS), sea surface height anomaly (SSHA), eastwa

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20

Wurl, Oliver, Lisa Gassen, Thomas H. Badewien, et al. "HALOBATES: An autonomous surface vehicle for high-resolution mapping of the sea-surface microlayer and near-surface layer on essential climate variables." Journal of Atmospheric and Oceanic Technology, October 28, 2024. http://dx.doi.org/10.1175/jtech-d-24-0021.1.

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Abstract Essential climate variables (ECVs) are physical, chemical, or biological parameters supporting the characterization of the climate system. The oceanic ECVs temperature and salinity have been defined for the sea surface (upper 1 mm) and bulk water (upper 2 meters). Direct observation and sampling of the sea surface from ships and buoys is limited due to the potential loss of integrity of the sea surface and contamination by the research platform. The design, development, and operation of a research vehicle with autonomous capabilities based on commercially available components are desc

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21

Takeda, Yoichi. "Surface C, N, O, and Na abundances of RR Lyrae variables implying the nature of internal mixing in low-mass stars." Monthly Notices of the Royal Astronomical Society, May 24, 2022. http://dx.doi.org/10.1093/mnras/stac1431.

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Abstract Photospheric abundances of C, N, O, and Na were determined by applying the synthetic spectrum-fitting technique to 34 snap-shot high-dispersion spectra of 22 RR Lyr stars covering a metallicity range of $-1.8 \lesssim $ [Fe/H] $\lesssim 0.0$, with an aim of investigating the mixing mechanism in the interior of low-mass giant stars by examining the abundance anomalies of these elements possibly affected by the evolution-induced dredge-up of nuclear burning products. Special attention was paid to check the recent theoretical stellar evolution simulations indicating the importance of the

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22

Mishonov, Alexey, Dan Seidov, and James Reagan. "Revisiting the multidecadal variability of North Atlantic Ocean circulation and climate." Frontiers in Marine Science 11 (February 22, 2024). http://dx.doi.org/10.3389/fmars.2024.1345426.

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The World Ocean’s surface, particularly in the North Atlantic, has been heating up for decades. There was concern that the thermohaline circulation and essential climate variables, such as the temperature and salinity of seawater, could undergo substantial changes in response to this surface warming. The Atlantic Meridional Overturning Circulation (AMOC) has changed noticeably over the last centennial and possibly slowed down in recent decades. Therefore, concerns about the future of the North Atlantic Ocean climate are warranted. The key to understanding the North Atlantic current climate tra

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23

Falor, Devang, Bishakhdatta Gayen, Debasis Sengupta, and Gregory N. Ivey. "Evaporation induced convection enhances mixing in the upper ocean." Frontiers in Marine Science 10 (May 16, 2023). http://dx.doi.org/10.3389/fmars.2023.1176226.

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The upper ocean surface layer is directly affected by the air-sea fluxes. The diurnal variations in these fluxes also cause the upper ocean mixed layer turbulence and mixing to diurnally vary. The underlying thermohaline structure also varies accordingly throughout the day. Here we use large-eddy simulation to quantify the role of surface evaporation in modulating the diurnal mixed layer turbulence and mixing in the presence of wind forcing. During daytime, the upper ocean boundary layer becomes thermally stratified, and a salinity inversion layer is formed in the upper 10m, leading to double

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24

Sampognaro, L., M. C. López-Abbate, and D. Calliari. "Microzooplankton community structure in a subtropical South-West Atlantic coastal site." Journal of the Marine Biological Association of the United Kingdom 103 (2023). http://dx.doi.org/10.1017/s0025315423000358.

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Abstract The microzooplankton community structure (species abundance, biomass, diversity) was investigated at a coastal marine station on the South-West Atlantic Ocean (34°23′S–53°45′W, Uruguay). This is a hydrographically complex site within the Subtropical Convergence zone of the SW Atlantic where knowledge of the microzooplankton is particularly scant. The main goal was to perform a first characterization of that community and evaluate its association to environmental drivers along an annual cycle. Oceanographic variables (temperature, salinity, irradiance, nutrients, chlorophyll-a) and cil

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25

Moreira, Daniel L. "Multidisciplinary Scientific Cruises for Environmental Characterization in the Santos Basin – Methods and Sampling Design." March 6, 2023. https://doi.org/10.5281/zenodo.7703121.

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The Santos Basin (SB) is the main petroliferous basin in the Brazilian continental margin and one of the most studied marine areas in Brazil. However, historical data suggest that new efforts should be carried out to acquire quantitative biological data, especially in the deep sea, to establish the baseline of essential ocean variables in different ecosystems for future monitoring programs. The Brazilian energy company Petrobras planned and executed 24 oceanographic cruises over a period of 2 years to assess the benthic (SANSED) and pelagic (SANAGU) systems of the SB (356 days at sea in 2019 a

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26

Cerutti, Julia M. B., Roi Holzman, Moshe Kiflawi, and Maoz Fine. "Regionalisation of Red Sea coral reefs based on remotely sensed environmental data identifies two distinct regions that align with large-scale climatic forcings." Coral Reefs, May 26, 2025. https://doi.org/10.1007/s00338-025-02668-z.

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Abstract “Regionalisation” refers to the identification of distinct geographical units relatively homogeneous in their biotic and/or abiotic attributes, with the aims of enhancing the understanding of ecosystem functioning and informing decision-making in conservation planning and research efforts. In the Red Sea, the paucity of in situ data and discipline-specific research interests have hampered quantitative and comprehensive regionalisation, impeding unified conservation policies in a marine biodiversity hotspot. Presented hereby is a robust regionalisation of the Red Sea based on long-term

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27

"Dynamics of a temperate fluvial estuary in early winter." Issue 3 7, no. 3 (2013): 237–43. http://dx.doi.org/10.30955/gnj.000339.

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In order to evaluate how current speed, salinity and water temperature stratification behaves under the influence of a freshwater source in a tidal domain, a 25 hour survey campaign was performed in the upper sector of the Vouga River estuary, the major source of freshwater of Ria de Aveiro, a coastal lagoon located in the Northwest of the Iberian Peninsula. The sampling campaign started at 10:30 AM of January 15th 2004 and ended next day, covering two tidal cycles, during neap tide condition (tidal range of about 1.7 m) and low river runoff (58 m3 s-1

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28

Bailey, Lewis P., Michael A. Clare, James E. Hunt, et al. "Highly variable deep-sea currents over tidal and seasonal timescales." Nature Geoscience, July 25, 2024. http://dx.doi.org/10.1038/s41561-024-01494-2.

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AbstractDeep-sea transport of sediment and associated matter, such as organic carbon, nutrients and pollutants, is controlled by near-bed currents. On the continental slope, these currents include episodic down-slope gravity-driven turbidity currents and more sustained thermohaline-driven along-slope contour currents. Recent advancements in deep-sea monitoring have catalysed a step change in our understanding of turbidity currents and contour currents individually. However, these processes rarely operate in isolation and the near-bed current regime is still to be quantified in a mixed system.

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29

Rosales, J. A., J. Petrovic, R. E. Mennickent, D. R. G. Schleicher, G. Djuraševic, and N. W. C. Leigh. "Double periodic variable V4142 Sgr: A key to approaching the stellar dynamo." Astronomy & Astrophysics, June 5, 2024. http://dx.doi.org/10.1051/0004-6361/202348290.

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In this work we focus on the double periodic variable (DPV) star V4142\,Sgr, aiming to provide a deeper understanding of its evolution, the formation of its accretion disk, and the operation of magnetic dynamos within the donor star. We analyze its characteristics in detail as well as the phenomena associated with DPV stars more generally. The model was implemented using the stellar evolution code MESA r22.11.1. The modeling process starts from the zero age main sequence and incorporates differential rotation to facilitate the creation of a stellar dynamo in the donor star. We adjusted the mod

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