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Letteratura scientifica selezionata sul tema "Convection (Oceanography)"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 luglio 2024

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Articoli di riviste sul tema "Convection (Oceanography)"

1

Callies, Jörn, and Raffaele Ferrari. "Baroclinic Instability in the Presence of Convection." Journal of Physical Oceanography 48, no. 1 (January 2018): 45–60. http://dx.doi.org/10.1175/jpo-d-17-0028.1.

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AbstractBaroclinic mixed-layer instabilities have recently been recognized as an important source of submesoscale energy in deep winter mixed layers. While the focus has so far been on the balanced dynamics of these instabilities, they occur in and depend on an environment shaped by atmospherically forced small-scale turbulence. In this study, idealized numerical simulations are presented that allow the development of both baroclinic instability and convective small-scale turbulence, with simple control over the relative strength. If the convection is only weakly forced, baroclinic instability

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2

Straneo, Fiammetta, Mitsuhiro Kawase, and Robert S. Pickart. "Effects of Wind on Convection in Strongly and Weakly Baroclinic Flows with Application to the Labrador Sea*." Journal of Physical Oceanography 32, no. 9 (September 1, 2002): 2603–18. http://dx.doi.org/10.1175/1520-0485-32.9.2603.

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Abstract Large buoyancy loss driving deep convection is often associated with a large wind stress that is typically omitted in simulations of convection. Here it is shown that this omission is not justified when overturning occurs in a horizontally inhomogeneous ocean. In strongly baroclinic flows, convective mixing is influenced both by the background horizontal density gradient and by the across-front advection of buoyancy due to wind. The former process—known as slantwise convection—results in deeper convection, while the effect of wind depends on the relative orientation of wind with respe

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3

Pasquero, Claudia, and Eli Tziperman. "Statistical Parameterization of Heterogeneous Oceanic Convection." Journal of Physical Oceanography 37, no. 2 (February 1, 2007): 214–29. http://dx.doi.org/10.1175/jpo3008.1.

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Abstract A statistical convective adjustment scheme is proposed that attempts to account for the effects of mesoscale and submesoscale variability of temperature and salinity typically observed in the oceanic convective regions. Temperature and salinity in each model grid box are defined in terms of their mean, variance, and mutual correlations. Subgrid-scale instabilities lead to partial mixing between different layers in the water column. This allows for a smooth transition between the only two states (convection on and convection off) allowed in standard convective adjustment schemes. The a

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4

Buch, Erik. "Physical oceanography of the Greenland Sea." Meddelelser om Grønland. Bioscience 58 (January 1, 2007): 14–21. http://dx.doi.org/10.7146/mogbiosci.v58.142635.

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Ocean-atmosphere interactions in the North Atlantic are responsible for heat transports that keep the Nordic region and North Western Europe 5–10°C warmer than the average of the corresponding latitude belt. This is to a large extent due to the ocean’s thermohaline circulation (THC). This circulation is driven by differences in water density, which is a function of temperature (thermo) and salinity (haline) and particularly by convection processes in the northern North Atlantic, especially the Labrador Sea and the Greenland Sea. Therefore, the Greenland Sea has attracted much attention i

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5

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 (February 24, 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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6

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 (August 13, 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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7

Spall, Michael A. "Influences of Precipitation on Water Mass Transformation and Deep Convection." Journal of Physical Oceanography 42, no. 10 (May 22, 2012): 1684–700. http://dx.doi.org/10.1175/jpo-d-11-0230.1.

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Abstract The influences of precipitation on water mass transformation and the strength of the meridional overturning circulation in marginal seas are studied using theoretical and idealized numerical models. Nondimensional equations are developed for the temperature and salinity anomalies of deep convective water masses, making explicit their dependence on both geometric parameters such as basin area, sill depth, and latitude, as well as on the strength of atmospheric forcing. In addition to the properties of the convective water, the theory also predicts the magnitude of precipitation require

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8

Su, Zhan, Andrew P. Ingersoll, Andrew L. Stewart, and Andrew F. Thompson. "Ocean Convective Available Potential Energy. Part I: Concept and Calculation." Journal of Physical Oceanography 46, no. 4 (April 2016): 1081–96. http://dx.doi.org/10.1175/jpo-d-14-0155.1.

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AbstractThermobaric convection (type II convection) and thermobaric cabbeling (type III convection) might substantially contribute to vertical mixing, vertical heat transport, and deep-water formation in the World Ocean. However, the extent of this contribution remains poorly constrained. The concept of ocean convective available potential energy (OCAPE), the thermobaric energy source for type II and type III convection, is introduced to improve the diagnosis and prediction of these convection events. OCAPE is analogous to atmospheric CAPE, which is a key energy source for atmospheric moist co

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9

Wirth, A., and B. Barnier. "Mean Circulation and Structures of Tilted Ocean Deep Convection." Journal of Physical Oceanography 38, no. 4 (April 1, 2008): 803–16. http://dx.doi.org/10.1175/2007jpo3756.1.

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Abstract Convection in a homogeneous ocean is investigated by numerically integrating the three-dimensional Boussinesq equations in a tilted, rotating frame ( f–F plane) subject to a negative buoyancy flux (cooling) at the surface. The study focuses on determining the influence of the angle (tilt) between the axis of rotation and gravity on the convection process. To this end the following two essential parameters are varied: (i) the magnitude of the surface heat flux, and (ii) the angle (tilt) between the axis of rotation and gravity. The range of the parameters investigated is a subset of ty

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10

Legg, Sonya. "A Simple Criterion to Determine the Transition from a Localized Convection to a Distributed Convection Regime*." Journal of Physical Oceanography 34, no. 12 (December 1, 2004): 2843–46. http://dx.doi.org/10.1175/jpo2653.1.

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Abstract A recent numerical study by Noh et al. of open-ocean deep convection in the presence of a single geostrophic eddy showed that two possible regimes exist: 1) the localized convection regime in which baroclinic instability of the eddy dominates, with slantwise fluxes and restratification, and 2) the distributed convection regime in which vertical mixing dominates. Noh et al. found that localized convection dominates for relatively small buoyancy forcing, strong eddies, and strong surface ambient stratification. Here it is shown that this regime transition can be expressed in terms of a

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Tesi sul tema "Convection (Oceanography)"

1

Pierce, David W. "Rotating convection and the oceanic general circulation /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/10993.

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2

Bhushan, Vikas. "Modeling convection in the Greenland Sea." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/58537.

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Thesis (S.M.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1998.<br>Includes bibliographical references (leaves 155-161).<br>A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic one-dimensional mixed layer model which is coupled to a thermodynamic ice model. Our model contains a representation of

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3

Steffen, Elizabeth Laird. "Observations of vertical and horizontal aspects of deep convection in the Labrador Sea by fully Lagrangian floats /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/11028.

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4

Wells, Mathew Graeme. "Convection, turbulent mixing and salt fingers." View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20011212.103012/index.html.

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5

Wilkinson, Jeremy. "Sea ice, convection and the Greenland Sea." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/25132/.

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The region where deep open-ocean convection occurs in the Greenland Sea corresponds to that where a sea ice winter feature, the Odden, usually forms. The role of sea ice in modifying the surface waters to overturn to depth is evaluated through the combination of in siu measurements, satellite imagery, meteorological measurements and drifting buoy data. Results suggest local meteorological and oceanographic conditions govern the ice conditions over the region. The high ambient wave energy precludes the formation of ice beyond the frazil-pancake stage; the changing surface pressure field, due to

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6

Pruis, Matthew J. "Energy and volume flux into the deep ocean : examining diffuse hydrothermal systems /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/10990.

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7

Grignon, Laure. "Causes of the interannual variability of deep convection." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/72147/.

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Deep water formation in the Labrador Sea and the Gulf of Lion, for example, results from convection. A cyclonic circulation leads to a doming of the isopycnals at its centre, where stratification is then completely eroded by high surface winter buoyancy loss. This thesis assesses the causes of the interannual variability of deep convection. We first aim to quantify the relative importance of preconditioning, defined as the temperature and salinity structures and contents of the water column before the onset of convection, and of the buoyancy forcing (averaged over one winter) on the final conv

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8

Mpeta, Emmanuel Jonathan. "Intra-seasonal convection dynamics over Southwest and Northeast Tanzania : an observational study." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/19650.

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Intraseasonal convection oscillation over the northeastern and southwestern Tanzania during MAM and DJF seasons respectively are examined using December, 1979 to May, 1994 pentad (5-day mean) Outgoing Longwave Radiation (OLR) as an indicator of convective cloud distribution. Area-averaged OLR indices are derived for the two areas. Time series of OLR indices for MAM and DJF indicate large quasi-periodic OLR fluctuations in some years and small fluctuations in other years. Periodogram analyses results reveal that dominant periodogram values for the oscillations were different in different years

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9

Cuny, Jerome. "Labrador Sea boundary currents /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/10959.

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10

Straneo, Fiammetta. "Dynamics of rotating convection including a horizontal stratification and wind /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/10996.

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Libri sul tema "Convection (Oceanography)"

1

Pawlowicz, Ryszard A. Tomographic observations of deep convection and the thermal evolution of the Greenland Sea Gyre, 1988-1989. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1994.

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2

Plate, E. J. Buoyant Convection in Geophysical Flows. Dordrecht: Springer Netherlands, 1998.

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3

Matishov, D. G. Ispolʹzovanie metoda kislorodnoĭ indikat͡sii niskhodi͡ashcheĭ konvekt͡sii morskoĭ vody v raĭone arkhipelaga Shpit͡sbergen: Po rezulʹtatam ėkspedit͡sii NIL "Polarstern" v ii͡une-ii͡ule 1991 g. Apatity: Kolʹskiĭ nauch. t͡sentr Rossiĭskoĭ akademii nauk, 1992.

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4

Alverson, Keith D. Topographic preconditioning of open ocean deep convection / by Keith D. Alverson. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1995.

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5

Slobodin, V. P. (Vladimir Pavlovich), Feopentov S. A, and Murmanskiĭ morskoĭ biologicheskiĭ institut, eds. Raschet poleĭ vodnykh mass okeana i postanovka ėksperimenta ikh sravnenii͡a mezhdu soboĭ metodom raspoznavanii͡a obrazov. Apatity: Kolʹskiĭ nauch. t͡sentr AN SSSR, 1990.

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6

Salmon, Rick. Rotating convection: 1995 Summer Study Program in Geophysical Fluid Dynamics. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1996.

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7

Harrison, D. E. Upper ocean warming: Spatial patterns of trends and interdecadal variability. Seattle, Wash: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Oceanic and Atmospheric Research Laboratories, Pacific Marine Environmental Laboratory, 2008.

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8

Flierl, Glenn R. The influence of convection on large-scale circulations: 1988 Summer Study Program in Geophysical Fluid Dynamics. Woods Hole, Mass: WHOI, 1989.

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9

Whitehead, John A. Rotating hydraulic control: 1997 summer study program in geophysical fluid dynamics. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1998.

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10

Stommel, Henry M. Collected works of Henry M. Stommel. Boston, MA: American Meteorological Society, 1995.

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Capitoli di libri sul tema "Convection (Oceanography)"

1

Özsoy, Emin, Zafer Top, George White, and James W. Murray. "Double Diffusive Intrusions, Mixing and Deep Sea Convection Processes in the Black Sea." In Black Sea Oceanography, 17–42. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-2608-3_2.

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2

Gerdes, Rüdiger, Jörg Hurka, Michael Karcher, Frank Kauker, and Cornelia Köberle. "Simulated History Of Convection in the Greenland and Labrador seas, 1948—2001." In The Nordic Seas: An Integrated Perspective Oceanography, Climatology, Biogeochemistry, and Modeling, 221–38. Washington, D. C.: American Geophysical Union, 2005. http://dx.doi.org/10.1029/158gm15.

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3

Johannessen, Ola M., Kjetil Lygre, and Tor Eldevik. "Convective chimneys and plumes in the northern Greenland Sea." In The Nordic Seas: An Integrated Perspective Oceanography, Climatology, Biogeochemistry, and Modeling, 251–72. Washington, D. C.: American Geophysical Union, 2005. http://dx.doi.org/10.1029/158gm17.

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4

Martinson, D. G. "Open Ocean Convection in the Southern Ocean." In Elsevier Oceanography Series, 37–52. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70059-x.

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5

Johannessen, O. M., S. Sandven, and J. A. Johannessen. "Eddy-Related Winter Convection in the Boreas Basin." In Elsevier Oceanography Series, 87–105. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70062-x.

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6

Carmack, Eddy C., and Ray F. Weiss. "Convection in Lake Baikal: An Example of Thermobaric Instability." In Elsevier Oceanography Series, 215–28. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70069-2.

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7

Whitehead, J. A. "Small and Mesoscale Convection as Observed in the Laboratory." In Elsevier Oceanography Series, 355–67. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70077-1.

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8

Guest, P. S., and K. L. Davidson. "Meteorological Triggers for Deep Convection in the Greenland Sea." In Elsevier Oceanography Series, 369–75. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70078-3.

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9

Chu, P. C. "Geophysics of Deep Convection and Deep Water Formation in Oceans." In Elsevier Oceanography Series, 3–16. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70057-6.

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10

Skyllingstad, E. D., D. W. Denbo, and John Downing. "Convection in the Labrador Sea: Community Modeling Effort (CME) Results." In Elsevier Oceanography Series, 341–54. Elsevier, 1991. http://dx.doi.org/10.1016/s0422-9894(08)70076-x.

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Atti di convegni sul tema "Convection (Oceanography)"

1

Globina, Lubov, and Lubov Globina. "ESTIMATE OF DEPENDENCE OF THE VERTICAL TRBULENT DIFFUSION COEFFICIENT FROM BUOYANCY FREQUENCY FOR COASTAL ZONE OF THE BLACK SEA." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b9376e319d7.73288147.

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The article highlights the most important studies of oceanographic processes, such as horizontal convection, winter cascading on the shelf and continental slope, the processes in the bottom of the Black Sea. The results of the study of small-scale structure of the shelf upper active layer of the Black Sea in 2014 are discussed. The new information about the distribution of the eddy diffusivity with depth in the coastal part of the Heracleian peninsula is given. The investigated dependence vertical turbulent diffusion coefficient from buoyancy frequency at the active layer is found to be has a

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2

Globina, Lubov, and Lubov Globina. "ESTIMATE OF DEPENDENCE OF THE VERTICAL TRBULENT DIFFUSION COEFFICIENT FROM BUOYANCY FREQUENCY FOR COASTAL ZONE OF THE BLACK SEA." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b43163a87e5.

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Abstract (sommario):

The article highlights the most important studies of oceanographic processes, such as horizontal convection, winter cascading on the shelf and continental slope, the processes in the bottom of the Black Sea. The results of the study of small-scale structure of the shelf upper active layer of the Black Sea in 2014 are discussed. The new information about the distribution of the eddy diffusivity with depth in the coastal part of the Heracleian peninsula is given. The investigated dependence vertical turbulent diffusion coefficient from buoyancy frequency at the active layer is found to be has a

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Rapporti di organizzazioni sul tema "Convection (Oceanography)"

1

Davis, Russ E. Convection in the Labrador Sea and An Autonomous Oceanographic Instrument Array. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada626791.

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2

Waliser, Duane E. Analysis of Observed and Modeled Surface Fluxes, Cloud Forcing, and Convective Processes for Improving the Meteorological and Oceanographic Modeling and Prediction Systems. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada610080.

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