Contrasting Westward and Eastward Propagating Mesoscale Eddies in the Global Ocean

Peng, Lin; Chen, Ge; Guan, Lei; Tian, Feng

doi:10.1109/tgrs.2021.3095936

Cited by 3 publications

(7 citation statements)

References 43 publications

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“…Fu (2009) revealed that the propagation pattern of the Southern Ocean eddy is highly affected by the shape of the bottom topography. Subsequently, Peng et al (2022) believed that with the increase in the difference between the maximum and minimum topographic fluctuation, eastward propagation eddies tended to move along the ridges and became more sensitive to topographic changes. The results of this study also show that the bottom topography plays a dominant role in the meridional propagation of the eddy channels.…”

Section: Discussionmentioning

confidence: 99%

“…When it comes to the factors impacting the eddy propagation patterns, numerous researchers have mainly focused on the current, wind fields, and bottom topography (Chen et al., 2022; Fu, 2009; Peng et al., 2022). Chen suggests that current fields are the primary external dynamic factors that reshape eddy motion, determining the mean eddy propagation direction.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, Peng et al. (2022) found that the magnitude of change in current and wind field stress simultaneously affected the zonal propagation of eddies. Chen et al.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, this study provides a comprehensive analysis of them in an attempt to explain the essence of the dynamics of eddy channel propagation in the Southern Ocean. For global eddies, the zonal propagation is intrinsically westward and may be reversed eastward by intense eastward ocean currents, such as the Gulf Stream and the ACC (Chelton et al., 2007, 2011b; Chen et al., 2022; Fu, 2009; Peng et al., 2022). Obviously, the current fields are the primary dynamic factor affecting the zonal propagation of eddies.…”

Section: Introductionmentioning

confidence: 99%

“…Obviously, the current fields are the primary dynamic factor affecting the zonal propagation of eddies. Moreover, Peng et al (2022) found that the magnitude of change in current and wind field stress simultaneously affected the zonal propagation of eddies. Chen et al (2022) believed that the effect of wind fields on eddy motion is indirect.…”

mentioning

confidence: 99%

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Major Migration Channels of Mesoscale Eddies in the Southern Ocean Derived From Satellite Altimetry

Guo

Zheng

Chen³

et al. 2022

JGR Oceans

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The propagation pathways of mesoscale eddies have an essential impact on the meridional transport of freshwater, carbon, nutrients, and other tracers. However, existing methods have limitations in exactly expressing their major propagation pathways. To tackle this problem, a direction‐based spatial clustering algorithm for the trajectory is proposed according to the partition‐and‐group framework. The idea is to extract the major eddy channels quantitatively, thus effectively representing the eddy trajectories with similar propagation pathways in a given spatial distance and direction, from the eddy identification and tracking datasets obtained by satellite altimetry spanning nearly 20 years in the Southern Ocean. The major eddy channels of the Southern Ocean are more geographically correlated rather than determined by polarity (anticyclonic eddies (AEs) and cyclonic eddies (CEs)). Importantly, the main axes of zonal propagation for eddy channels are extracted in this study. In the area north of 45°S (30°S–45°S), the zonal propagation (both for AEs and CEs) is intrinsically westward along ∼42°S ± 2° (main axes). While in those south of 45°S (45°S–80°S), it is reversed to eastward, propagating zonally along ∼56°S ± 2° (main axes) and obviously showing a gyre pattern. The bottom topography significantly effects on the propagation pathways of eddy channels in the Southern Ocean. Mainly, their meridional propagation pathways are pronouncedly steered by the shape of oceanic ridges around isobath −3900m (AEs for −3,877 m, CEs for −3,922 m).

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Moreover, Peng et al. (2022) found that the magnitude of change in current and wind field stress simultaneously affected the zonal propagation of eddies. Chen et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Major Migration Channels of Mesoscale Eddies in the Southern Ocean Derived From Satellite Altimetry

Guo

Zheng

Chen³

et al. 2022

JGR Oceans

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Multi‐Stage Development Within Anisotropy Insight of an Anticyclone Eddy in Northwestern South China Sea in 2021

Qiao,

Qiu,

Wang

et al. 2023

Geophysical Research Letters

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Mesoscale eddies help regulate ocean energy cascades. Eddies deformation influences barotropic instability, which represents kinetic energy transfer between scales; however, the barotropic instability structure has not been well studied. We investigated an intra‐thermocline eddy (ITE) and developed a novel anisotropic method to examine the horizontal barotropic instability. The development of the ITE was monitored using a state‐of‐the‐art autonomous underwater vehicle from May to July. The ITE became trapped in June and moved eastward in July. Based on anisotropic theory, the barotropic instability was separated into isotropic and anisotropic productions. The anisotropy contained information regarding shape and mean flow feedback of the eddy. Barotropic instability was the main source for ITE eastward propagation and was dominated by anisotropic production. Following a shape and anisotropy change, the ITE gained the mean‐flow kinetic energy by the anisotropy shear production in June and by the anisotropy stretch production when moving eastward in July.

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Medium-range forecasting of oceanic eddy trajectory

Chen,

et al. 2024

International Journal of Digital Earth

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Contrasting Westward and Eastward Propagating Mesoscale Eddies in the Global Ocean

Cited by 3 publications

References 43 publications

Major Migration Channels of Mesoscale Eddies in the Southern Ocean Derived From Satellite Altimetry

Major Migration Channels of Mesoscale Eddies in the Southern Ocean Derived From Satellite Altimetry

Multi‐Stage Development Within Anisotropy Insight of an Anticyclone Eddy in Northwestern South China Sea in 2021

Medium-range forecasting of oceanic eddy trajectory

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