Добірка наукової літератури з теми "Thermohaline variability"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Thermohaline variability".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Thermohaline variability"
Greatbatch, Richard J., and K. Andrew Peterson. "Interdecadal variability and oceanic thermohaline adjustment." Journal of Geophysical Research: Oceans 101, no. C9 (September 15, 1996): 20467–82. http://dx.doi.org/10.1029/96jc01531.
Повний текст джерелаFerrari, Raffaele, and Daniel L. Rudnick. "Thermohaline variability in the upper ocean." Journal of Geophysical Research: Oceans 105, no. C7 (July 15, 2000): 16857–83. http://dx.doi.org/10.1029/2000jc900057.
Повний текст джерелаWeaver, Andrew J., Jochem Marotzke, Patrick F. Cummins, and E. S. Sarachik. "Stability and Variability of the Thermohaline Circulation." Journal of Physical Oceanography 23, no. 1 (January 1993): 39–60. http://dx.doi.org/10.1175/1520-0485(1993)023<0039:savott>2.0.co;2.
Повний текст джерелаLatif, M., C. Böning, J. Willebrand, A. Biastoch, J. Dengg, N. Keenlyside, U. Schweckendiek, and G. Madec. "Is the Thermohaline Circulation Changing?" Journal of Climate 19, no. 18 (September 15, 2006): 4631–37. http://dx.doi.org/10.1175/jcli3876.1.
Повний текст джерелаZhai, Xiaoming, Helen L. Johnson, and David P. Marshall. "A Simple Model of the Response of the Atlantic to the North Atlantic Oscillation." Journal of Climate 27, no. 11 (May 29, 2014): 4052–69. http://dx.doi.org/10.1175/jcli-d-13-00330.1.
Повний текст джерелаBensi, Manuel, Vedrana Kovačević, Leonardo Langone, Stefano Aliani, Laura Ursella, Ilona Goszczko, Thomas Soltwedel, et al. "Deep Flow Variability Offshore South-West Svalbard (Fram Strait)." Water 11, no. 4 (April 2, 2019): 683. http://dx.doi.org/10.3390/w11040683.
Повний текст джерелаHellmer, H. H. "Variability Of Thermohaline Circulation Under An Ice Shelf." Annals of Glaciology 14 (1990): 338. http://dx.doi.org/10.3189/s0260305500009009.
Повний текст джерелаTziperman, Eli, and Petros J. Ioannou. "Transient Growth and Optimal Excitation of Thermohaline Variability." Journal of Physical Oceanography 32, no. 12 (December 2002): 3427–35. http://dx.doi.org/10.1175/1520-0485(2002)032<3427:tgaoeo>2.0.co;2.
Повний текст джерелаHellmer, H. H. "Variability Of Thermohaline Circulation Under An Ice Shelf." Annals of Glaciology 14 (1990): 338. http://dx.doi.org/10.1017/s0260305500009009.
Повний текст джерелаLehmann, Andreas, and Hans-Harald Hinrichsen. "On the thermohaline variability of the Baltic Sea." Journal of Marine Systems 25, no. 3-4 (July 2000): 333–57. http://dx.doi.org/10.1016/s0924-7963(00)00026-9.
Повний текст джерелаДисертації з теми "Thermohaline variability"
Hughes, Tertia M. C. "Uniqueness and variability of the ocean's thermohaline circulation." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28780.
Повний текст джерелаAnother new result is the range of Conveyor equilibria found under mixed boundary conditions. Rare cases with North Pacific sinking are characterized by a very fresh halocline in the Southern Ocean and a reversed pole-to-pole surface density contrast. A more quantitative investigation leads to an approximately linear relationship between the Atlantic overturning and the meridional gradient of zonally-averaged depth-integrated steric height from the northern boundary of the ocean to the southern tip of Africa; on the other hand, the local linear relationships postulated in most two-dimensional plane models of the overturning circulation could not be validated.
In the second part, the climatology of a global ocean model is presented, and the importance in the model of the warm water route of the Conveyor through the Indian Ocean relative to the cold water route through Drake Passage is noted. The implied ocean heat and freshwater transports from the Canadian Climate Centre second generation atmospheric general circulation model are then presented, and are shown to be incompatible with the present-day thermohaline circulation.
Finally, in the third part, a simple new parameterization of the sea surface temperature-evaporation feedback is developed as an extension of the traditional mixed boundary conditions. The positive sign of the feedback for the thermohaline circulation is demonstrated, and three examples featuring decadal, century and millennial timescale variability in one-hemisphere idealized basins are discussed. No fundamental alterations of the mechanisms under mixed boundary conditions are found, although the timescale is altered or the variability interrupted sooner in some cases.
Stuebe, David Allen. "Temperature and salinity variability in thermohaline staircase layers." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/39194.
Повний текст джерелаIncludes bibliographical references (p. 65-67).
A moored profiler record from the western tropical North Atlantic provides the first continuous time series of temperature, salinity and velocity profiles in a thermohaline staircase. Variations in the intensity of layering and the evolution of layer properties are well documented during the 4.3 month record. Such staircases are the result of strong salt fingering at the interfaces between the mixed layers, and these data provide unique insights into the dynamics of salt fingers. In particular, a striking linear correlation between the temperature and salinity of the layers may be interpreted as resulting from vertical salt finger flux divergences. Data from this record allow new interpretations of previous work on this topic by McDougall (1991).
by David Allen Stuebe.
S.M.
Tyner, Robin D. "DECADAL variability of thermohaline structure at the SHEBA site." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA365397.
Повний текст джерела"June 1999". Thesis advisor(s): Timothy P. Stanton. Includes bibliographical references (p. 97-100). Also available online.
Myers, Paul Glen. "Seasonal forcing and low-frequency variability of the thermohaline circulation." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60722.
Повний текст джерелаDespite the presence of the forcing on the dominant seasonal timescale, it is found that the system may oscillate at the decadal period or longer. The decadal variability is excited by changes in the net surface density flux which are due to the advection of temperature and salinity anomalies in the model domain. The magnitude of the seasonal cycle also plays an important role in determining the timescale of variability. Violent overturning events may occur on the century timescale under seasonal forcing. The magnitudes of the flushes are reduced compared to those found in similar experiments without the presence of a seasonal cycle.
Bensi, Manuel. "Thermohaline variability and mesoscale dynamics observed at the E2M3A deep-site in the South Adriatic Sea." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7387.
Повний текст джерелаContinuous measurements are strictly essential to better understand the deep convection as well as for monitoring the seasonal and interannual thermohaline variability in the ocean. For these reasons, the south Adriatic Sea has been constantly monitored by means of the E2M3A deep observational site, located in its central part (Latitude 41° 50’ N, Longitude 17° 45’ E, maximum depth 1250m) since 2006. Temperature, salinity and current time series collected between 2006 and 2010 are analysed in this thesis and they represent the longest time series available for this region. Moreover, these time series are merged with Conductivity-Temperature-Depth (CTD) profiles obtained from several oceanographic cruises to provide the necessary spatial distribution of data for describing the thermohaline properties in the study area. The analysis of the data presented here shows that winter 2007 was characterized by a weak convection, while winter 2008 and following winters revealed a stronger deep convection able to reach 800-900m in February 2008. Time series highlight the abrupt temperature (T) and salinity (S) decrease, noticeable down to 600-700m depth from March 2008 on. The intermediate layer experienced a maximum decrease in T and S of ~0.4°C and ~0.06 respectively, clearly evident after each strong winter convection phase. The bottom layer (~1200m), instead, shows an opposite behaviour: it suffered a continuous T and S increase (linear trend of ~0.05 °C y-1 and ~0.004 y-1, respectively) during the whole observational period. These changes are discussed in a context of strong relationship between the variability of the Ionian surface circulation recently discovered, and the heat and salt content changes in the South Adriatic presented in this study. The results show that the mechanism triggering the salt content changes in the South Adriatic is based mainly on the winter convection, which transfers surface fresher water towards deeper layers. Nevertheless, current measurements also indicate that the passage of mesoscale eddies in the region can produce sudden thermohaline perturbations along the water column for 10-15 days. Cyclonic eddies seem to be more frequent in the proximity of the observational site than the anticyclonic ones. Interestingly, the comparison between time series and satellite images (Chl-a surface distribution) reveals, for the first time, that the vortices act along the whole water column. Their passage produces a twofold effect: the contribution to the re-stratification of the water column during the post convection phase, by exchanging the buoyancy between the mixed path and the surrounding waters, and the transfer of heat and salt between the deep and the intermediate layers.
Misure oceanografiche in continuo sono essenziali per comprendere meglio il processo di formazione delle acque dense e per monitorare la variabilità termoalina stagionale e interannuale in oceano. Per queste ragioni, a partire dal 2006 il Sud Adriatico è stato costantemente monitorato grazie all’utilizzo del sito di osservazione denominato E2M3A, ancorato nella parte centrale del Sud Adriatico (latitudine 41° 50’ N, longitudine 17° 45’ E, profondità massima 1250m). Le serie temporali di temperatura, salinità e correnti marine raccolte tra il 2006 e il 2010 sono analizzate in questa tesi e rappresentano la serie di dati più lunga mai ottenuta in questa regione. Oltretutto, per fornire la necessaria copertura spaziale dei dati utile a descrivere le proprietà termoaline nell’area di studio, le serie temporali sono state integrate con profili CTD (Conductivity-Temperature-Depth) provenienti da diverse crociere oceanografiche. L’analisi dei dati presentata qui mostra che l’inverno 2007 è stato caratterizzato da una debole convezione, mentre l’inverno 2008 e i successivi hanno mostrato una convezione più intensa, capace di raggiungere 800-900m di profondità a Febbraio 2008. Le serie temporali evidenziano una diminuzione repentina di temperatura (T) e salinità (S), visibile fino a 600-700m a partire da Marzo 2008. Lo strado intermedio ha subito rispettivamente una diminuzione massima di T e S di ~0.4°C e ~0.06, chiaramente evidente a seguito di ogni fase di intensa convezione invernale. Lo strato di fondo (~1200m) ha mostrato invece un comportamento opposto: un inaspettato e continuo aumento di T and S (trend lineare ~0.05 °C y-1 e ~0.004 y-1, rispettivamente) durante tutto il periodo di studio. Questi cambiamenti sono discussi nell’ambito della forte relazione tra la variabilità della circolazione superficiale dello Ionio recentemente scoperta e i cambiamenti nel contenuto di calore e sale del Sud Adriatico presentati in questo studio. I risultati mostrano che il meccanismo in grado di produrre cambiamenti nel contenuto di sale nel Sud Adriatico è principalmente basato sulla convezione invernale, che trasferisce acqua superficiale meno salata verso strati più profondi. Tuttavia, le misure di corrente mostrano che anche il passaggio di vortici a mesoscala può indurre repentine perturbazioni delle proprietà termoaline lungo la colonna d’acqua anche per 10-15 giorni. Vortici di tipo ciclonico sembrano essere più frequenti in prossimità del mooring rispetto a quelli di tipo anticiclonico. È interessante notare che il confronto tra le serie temporali e le immagini da satellite della distribuzione superficiale di clorofilla-a rivela, per la prima volta in questa regione, che i vortici agiscono su tutta la colonna d’acqua. Il loro passaggio produce un duplice effetto: il contributo alla ri-stratificazione della colonna d’acqua a seguito della fase di convezione invernale e il trasferimento di calore e sale tra gli strati intermedio e profondo.
XXIV Ciclo
1978
Hutchinson, Katherine Alessandra. "Thermohaline variability of AAIW in the Atlantic sector of the Southern Ocean investigated using an Altimetry Gravest Empirical Mode." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/6648.
Повний текст джерелаKuhlbrodt, Till. "Stability and variability of open-ocean deep convection in deterministic and stochastic simple models." Phd thesis, [S.l. : s.n.], 2002. http://pub.ub.uni-potsdam.de/2002/0033/kuhlb.pdf.
Повний текст джерелаHoundegnonto, Odilon Joël. "Analyse des variations thermohalines des échelles intrasaisonnière à saisonnière des panaches d'eau douce du Golfe de Guinée." Thesis, Brest, 2021. http://www.theses.fr/2021BRES0105.
Повний текст джерелаIn the Gulf of Guinea (GG), freshwater originated from river discharges and high precipitation rates contribute to the upper ocean density stratification, and play a key role in modulating air-sea interactions. However, the thermohaline variations of the ocean upper layers within the freshwater plumes in the GG are still poorly known, as they are poorly observed and documented. The main objective of this thesis is therefore to study and document the spatial variability at horizontal mesoscale (10-100 km) and vertical (0-100m), from intra-seasonal to seasonal time scales of the thermohaline 3D structure in the freshwater plume areas of the GG: mainly the Congo and Niger Rivers plumes. First, using SSS SMOS satellite data, our study showed that freshwater plumes in this region extend towards the open ocean following two propagation regimes. During September to January, they propagate northwestward while from January to April they redirect to the southwest, where their maximum extension is observed in April. The rest of the year, from May to August, is marked by a surface salinization episode, where the freshwater plumes dissipate with a minimum extension observed in August. A salinity budget analysis in the surface mixed layer allowed highlighting the main physical processes controlling the seasonal variability of salinity within these freshwater plumes. We showed that horizontal advection processes and freshwater fluxes by precipitation and river discharges are the main contributors of low SSS distribution in this region. In the southeastern Gulf of Guinea, off Congo, the horizontal SSS advection is dominated by Ekman wind-driven currents. Second, we showed that the offshore distribution of the Congo plume on intra-seasonal time scales is associated with salt barrier layers and with thermohaline staircases profiles. In a case study (for 2016/03/31), we showed that the observed thermohaline staircases would result from the shear dynamics between the surface Ekman flow associated with the offshore (North-Westward) distribution of the Congo plume, and the geostrophic (South-Eastward) flow associated with the denser and saltier subsurface water masses of the open ocean to the west. Finally, using a Lagrangian approach, we have highlighted the origin and large-scale structuring of water masses involved in the strong haline stratification observed off Congo. This study showed the strong shear of the currents associated with the vertical salinity gradients within the water column associated with the staircases profiles
Barrier, Nicolas. "Variability of the ocean circulation in the North-Atlantic in response to atmospheric weather regimes." Thesis, Brest, 2013. http://www.theses.fr/2013BRES0064/document.
Повний текст джерелаThe aim of the PhD is to investigate the impacts of the large-Scale atmospheric variability on the North- Atlantic ocean circulation. This question has already been addressed in a large number of studies, in which the atmospheric variability is decomposed into modes of variability, determined by decomposing sea-Level pressure anomalies into Empirical Orthogonal Function (EOFs). These modes of variability are the North-Atlantic Oscillation (NAO), the East-Atlantic Pattern (EAP) and the Scandinavian Pattern (SCAN). EOF decomposition assumes that the modes are orthogonal and symmetric. The latter assumption, however, has been shown to be inadequate for the NAO. Hence, a different framework is used in this study to assess the atmospheric variability, the so-Called weather regimes. These are large-Scale, recurrent and quasi-Stationary atmospheric patterns that have been shown to capture well the interannual and decadal variability of atmospheric forcing to the ocean. Furthermore, they allow to separate the spatial patterns of the positive and negative NAO phases. Hence, these weather regimes are a promising alternative to modes of variability in the study of the ocean response to atmospheric variability. Using observations and numerical models (realistic or in idealised settings), we have shown that the Atlantic Ridge (AR), NAO− and NAO+ regimes drive a fast (monthly to interannual) wind-Driven response of the subtropical and subpolar gyres (topographic Sverdrup balance) and of the meridional overturning circulation (MOC, driven by Ekman transport anomalies). At decadal timescales, the subpolar gyre strengthens for persistent NAO+ and Scandinavian Blocking (BLK) conditions via baroclinic adjustment to buoyancy fluxes and slackens for persistent AR conditions via baroclinic adjustment to wind-Stress curl anomalies. The latter mechanism also accounts for the strengthening of the subtropical gyre for persistent NAO+ conditions and its weakening for persistent AR conditions. The gyres response to persistent NAO− conditions reflects the southward shift of the gyre system (the intergyre gyre). The MOC spins-Up for persistent NAO+ and BLK conditions via increased deep water formation in the Labrador Sea, and conversely for the NAO− and AR regimes. Last, heat budget calculations in the subpolar gyre and the Nordic Seas have been performed using four global ocean hindcasts. The winter averaged heat convergence in the western subpolar gyre is positively correlated with the NAO− winter occurrences, which is due to the intergyregyre circulation, while it is negatively correlated with AR winter occurrences, because of the wind-Driven reduction of both gyres. Downward surface heat flux anomalies are negatively correlated with NAO+ occurrences, and conversely for the NAO−. In the Nordic Seas, they are positively correlated with BLK and to a lesser extent AR occurrences. Furthermore, we suggest that the heat content variability in the western subpolar gyre is the signature of the delayed response (6-Year lag) to the time-Integrated NAO+ forcing, due to the combination of the immediate (0-Lag) response of surface heat flux and the lagged (3 year lag) response of ocean heat convergence
Msadek, Rym. "Rôle de la circulation thermohaline dans la variabilité du climat." Paris 6, 2009. http://www.theses.fr/2009PA066087.
Повний текст джерелаКниги з теми "Thermohaline variability"
Tyner, Robin D. DECADAL variability of thermohaline structure at the SHEBA site. Monterey, Calif: Naval Postgraduate School, 1999.
Знайти повний текст джерелаSakai, Kotaro. Late-pleistocene climate variability and the global thermohaline circulation. 1996.
Знайти повний текст джерелаDecadal Variability of Thermohaline Structure at the Sheba Site. Storming Media, 1999.
Знайти повний текст джерелаЧастини книг з теми "Thermohaline variability"
Marotzke, Jochem. "Analysis of Thermohaline Feedbacks." In Decadal Climate Variability, 333–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-03291-6_8.
Повний текст джерелаMeincke, J., D. Quadfasel, W. H. Berger, K. Brander, R. R. Dickson, P. M. Haugan, M. Latif, et al. "Variability of the Thermohaline Circulation (THC)." In Marine Science Frontiers for Europe, 39–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55862-7_4.
Повний текст джерелаRahmstorf, Stefan. "Decadal Variability of the Thermohaline Ocean Circulation." In Beyond El Niño, 309–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-58369-8_15.
Повний текст джерелаIvanova, Elena V. "Variability of the Meridional Overturning Circulation and Paleoceanographic Events in the North Atlantic During the Last Climatic Cycle." In The Global Thermohaline Paleocirculation, 31–59. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2415-2_3.
Повний текст джерелаHofmann, Eileen E., and John M. Klinck. "Thermohaline Variability of the Waters Overlying The West Antarctic Peninsula Continental Shelf." In Ocean, Ice, and Atmosphere: Interactions at the Antarctic Continental Margin, 67–81. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/ar075p0067.
Повний текст джерелаKurian, Nisha, Joshua Costa, V. Suneel, V. V. Gopalakrishna, R. R. Rao, K. Girish, S. Amritash, M. Ravichandran, Lix John, and C. Ravichandran. "Observed Interannual Variability of the Thermohaline Structure in the South Eastern Arabian Sea." In Remote Sensing of the Changing Oceans, 305–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16541-2_16.
Повний текст джерелаSakai, Kotaro, and W. Richard Peltier. "The Influence of Deep Ocean Diffusivity on the Temporal Variability of the Thermohaline Circulation." In Geophysical Monograph Series, 227–42. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm126p0227.
Повний текст джерелаAlekseev, G. V., V. V. Ivanov, and A. A. Korablev. "Interannual Variability of the Thermohaline Structure in the Convective Gyre of the Greenland Sea." In The Polar Oceans and Their Role in Shaping the Global Environment, 485–96. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm085p0485.
Повний текст джерелаMarchal, Olivier, Thomas F. Stocker, and Fortunat Joos. "Physical and biogeochemical responses to freshwater-induced thermohaline variability in a zonally averaged ocean model." In Mechanisms of Global Climate Change at Millennial Time Scales, 263–84. Washington, D. C.: American Geophysical Union, 1999. http://dx.doi.org/10.1029/gm112p0263.
Повний текст джерелаBensi, Manuel, Vanessa Cardin, and Angelo Rubino. "Thermohaline Variability and Mesoscale Dynamics Observed at the Deep-Ocean Observatory E2M3A in the Southern Adriatic Sea." In The Mediterranean Sea, 139–55. Oxford: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118847572.ch9.
Повний текст джерелаТези доповідей конференцій з теми "Thermohaline variability"
Chu, Peter C., Colleen M. McDonald, Murat Kucukosmanoglu, Albert Judono, Tetyana Margolina, and Chenwu Fan. "Effect of inter- and intra-annual thermohaline variability on acoustic propagation." In SPIE Defense + Security, edited by Weilin (Will) Hou and Robert A. Arnone. SPIE, 2017. http://dx.doi.org/10.1117/12.2258687.
Повний текст джерелаDemetrashvili, Demuri, Vepkhia Kukhalashvili, Aleksandre Surmava, and Diana Kvaratskhelia. "MODELING OF VARIABILITY OF THE REGIONAL DYNAMIC PROCESSES DEVELOPED DURING 2017-2019 IN THE EASTERNMOST PART OF THE BLACK SEA." In GEOLINKS International Conference. SAIMA Consult Ltd, 2020. http://dx.doi.org/10.32008/geolinks2020/b2/v2/10.
Повний текст джерела