Gyration effect of the large-scale turbulence in the upper ocean

Heinloo, Jaak; Toompuu, Aleksander; Lilover, Madis‐Jaak

doi:10.1007/s10652-012-9247-2

Cited by 4 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, the greater intensity of cyclones makes them less vulnerable in the ACC to the aforementioned shear suppression, permitting them to survive longer. The causes for asymmetries of anticyclones and cyclones are unclear and are subject to ongoing research also in fluid dynamics [e.g., Arai and Yamagata , ; Nycander , ; Cenedese and Linden , ; Hakim et al ., ; Frisius , ; Graves et al ., ; Ponomarev et al ., ; Moisy et al ., ; Perret et al ., ; Badin , ; Heinloo et al ., ], with suggestions that longevity of anticyclones is favored by anticyclones being more stable and less prone to Rossby wave dispersion. In contrast, a potential contribution favoring cyclones could arise from centrifugal forces acting differently for anticyclonic and cyclonic eddies.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, eddies of the dominant polarity are typically formed more frequently. The causes for asymmetries of anticyclones and cyclones in these respects are subject to ongoing research [e.g., Arai and Yamagata , ; Nycander , ; Cenedese and Linden , ; Hakim et al ., ; Frisius , ; Graves et al ., ; Ponomarev et al ., ; Moisy et al ., ; Perret et al ., ; Badin , ; Heinloo et al ., ].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Southern Ocean eddy phenomenology

et al. 2015

View full text Add to dashboard Cite

Mesoscale eddies are ubiquitous features in the Southern Ocean, yet their phenomenology is not well quantified. To tackle this task, we use satellite observations of sea level anomalies and sea surface temperature (SST) as well as in situ temperature and salinity measurements from profiling floats. Over the period 1997–2010, we identified over a million mesoscale eddy instances and were able to track about 105 of them over 1 month or more. The Antarctic Circumpolar Current (ACC), the boundary current systems, and the regions where they interact are hot spots of eddy presence, representing also the birth places and graveyards of most eddies. These hot spots contrast strongly to areas shallower than about 2000 m, where mesoscale eddies are essentially absent, likely due to topographical steering. Anticyclones tend to dominate the southern subtropical gyres, and cyclones the northern flank of the ACC. Major causes of regional polarity dominance are larger formation numbers and lifespans, with a contribution of differential propagation pathways of long‐lived eddies. Areas of dominance of one polarity are generally congruent with the same polarity being longer‐lived, bigger, of larger amplitude, and more intense. Eddies extend down to at least 2000 m. In the ACC, eddies show near surface temperature and salinity maxima, whereas eddies in the subtropical areas generally have deeper anomaly maxima, presumably inherited from their origin in the boundary currents. The temperature and salinity signatures of the average eddy suggest that their tracer anomalies are a result of both trapping in the eddy core and stirring.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Southern Ocean eddy phenomenology

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Besides returning the turbulence problem to the physical background and demonstrating the efficiency of the classical physics principles in advancing the TM, the formulation of the PCTM also includes several future tasks including the modification of the statistical fluid mechanics replacing the characterization of flow field in infinitesimal surroundings of the flow field points by the flow velocity v with the pairs ( , ) v R and advancing the methods of turbulence measurements so far adjusted for the needs of the CTM. The formulation of the PCTM also increases the number of applications of TM, outlined in several examples reported and/or referred to in (Heinloo, 2013b(Heinloo, , 2008b(Heinloo, , 2004aHeinloo & Toompuu, 2013;Heinloo, Toompuu, & Lilover, 2012). The examples can be arranged into three groups.…”

Section: Discussionmentioning

confidence: 99%

Physics of Solution of Primary Task of the Turbulence Problem

Heinloo

2014

APR

Self Cite

View full text Add to dashboard Cite

The paper discusses one outcome of the physical viewpoint to the turbulence problem specifying the primary task of the solution of this problem in the formulation of the turbulence mechanics in the spin-included form with the spin understood as a local average dynamic measure generated by non-local eddy structure of the turbulent flow field. Some upshots of the solution of this task in the form of the postclassical turbulence mechanics are commented.

show abstract

“…In sub-subsection 3.3.2 it was pointed out that the frame rotation prefers the anticyclonic orientation of  . The represented in [50,51]…”

Section: Gyration Effectmentioning

confidence: 99%

Postclassical Turbulence Mechanics

Heinloo

2013

JMP

Self Cite

View full text Add to dashboard Cite

This paper surveys the formalism and applications of the postclassical turbulence mechanics (PCTM) grounded on the characterization of turbulent flow field in infinitesimal surroundings of the flow field points besides the flow velocity at these points also by the curvature of the velocity fluctuation streamlines passing these points. The PCTM applies this step to found the turbulence split into the orientated and the non-orientated constituents. The split specifies the competence of the classical turbulence mechanics (CTM) to the description of the non-orientated turbulence constituent and delegates the description of the orientated turbulence constituent (in the spirit of the theory of micropolar fluids) to the equation of moment-of-momentum. The concurrent presence of the orientated (relatively large scale) and the non-orientated (relatively small scale) turbulence constituents enables to compile the CTM and the conception of L. F. Richardson and A. N. Kolmogorov about the cascading turbulence (RK conception) within a conjoint formalism. The compilation solves the classical conflict between the CTM and the RK conception, though evinces a conflict of another type characterized as paradigmatic.

show abstract

Gyration effect of the large-scale turbulence in the upper ocean

Cited by 4 publications

References 15 publications

Southern Ocean eddy phenomenology

Southern Ocean eddy phenomenology

Physics of Solution of Primary Task of the Turbulence Problem

Postclassical Turbulence Mechanics

Contact Info

Product

Resources

About