Effects of the STCC eddies on the Kuroshio based on the 20-year JCOPE2 reanalysis results

Chang, Yu Lin; Miyazawa, Yasumasa; Guo, Xinyu

doi:10.1016/j.pocean.2015.04.006

Cited by 47 publications

(48 citation statements)

References 36 publications

(38 reference statements)

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“…Indeed, in Figure a it presents two low‐SLA centers in regions east of Luzon St and Luzon Islands (within red boxes), which indicates that more cyclonic eddies occupy there during the high‐LST years. Dominant cyclonic eddies east of Luzon Island tend to reduce the northward KT and thus provide a favorable condition to the Kuroshio intrusion [ Lien et al ., ; Chang et al ., ]. The occurrence of cyclonic eddies on the east side of Luzon St can block the northward Kuroshio east of Taiwan and enhance the Kuroshio intrusion [ Yuan et al ., ].…”

Section: Discussionmentioning

confidence: 99%

Interannual modulation of eddy kinetic energy in the northeastern South China Sea as revealed by an eddy‐resolving OGCM

et al. 2016

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Interannual modulation of eddy kinetic energy (EKE) in the northeastern South China Sea (NE‐SCS) is investigated based on outputs of an eddy‐resolving oceanic general circulation model between 1980 and 2014. The EKE displays distinct interannual modulations with periods between 1.5 and 7 years. The maximum peak‐to‐trough amplitude of the interannual modulation occurred during period 2004–2005, which was about 1.5‐fold the time‐mean EKE level. Further analysis suggested that interannual variability of EKE in the NE‐SCS is primarily modulated by the Luzon Strait transport (LST). During high‐EKE years, the LST increases corresponding to a strengthened Kuroshio intrusion. The strengthened Kuroshio intrusion enhances the baroclinic instability of current in the NE‐SCS and thus leads to a strong EKE. The reverse is true during low‐EKE years when LST is smaller. Influences of ENSO and Pacific mesoscale eddies on the interannual modulation of LST are also discussed in this study.

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Section: Discussionmentioning

confidence: 99%

Interannual modulation of eddy kinetic energy in the northeastern South China Sea as revealed by an eddy‐resolving OGCM

et al. 2016

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“…Yang et al, 1999;Chern and Wang, 2005;Kuo and Chern, 2011;Chang et al, 2015). Lien et al (2014) identified and tracked westward-propagating eddies using AVISO sea surface height (SSH) and surface geostrophic current data, and demonstrated that almost all the observed Kuroshio transport anomalies on an intraseasonal time scale can be explained by impinging eddies.…”

Section: Transportmentioning

confidence: 99%

The Kuroshio and Luzon Undercurrent East of Luzon Island

Lien¹,

Ma²,

Lee³

et al. 2015

Oceanog

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“…Mesoscale eddies in the North Pacific also contribute to the synoptic to intraseasonal variability in the Kuroshio east of Taiwan, as examined using the observations at the WOCE PCM‐1 line (Johns et al, ; Liu et al, ; Yang et al, ; Zhang et al, ), satellite data analysis combined with numerical model studies (Chang et al, ; Chang & Oey, ; Cheng et al, ; Hsin et al, ; Kuo et al, ; Lee et al, ; Yan et al, ), and recent ship‐based and mooring observations both at the KTV1 line (∼23.75°N) east of Taiwan (Andres et al, ; Jan et al, ; Tsai et al, ) and along a zonal transect off the northeast coast of Luzon (Lien et al, 2015). Despite a debate between Chang et al () and Hsin et al () about the cause of the interannual variability of Kuroshio transport, most of these studies agree qualitatively: a single cyclone or anticyclone decreases or increases the Kuroshio transport, respectively, whereas a pair of eddies (also called “dipole eddy”) could either strengthen or weaken the Kuroshio, depending on the alignment angle of the two adjacent eddies (Yan et al, ). However, the processes governing the evolution during the interactions of mesoscale eddies with the Kuroshio are rarely discussed in the literature.…”

Section: Introductionmentioning

confidence: 99%

Eddy‐Kuroshio Interactions: Local and Remote Effects

et al. 2017

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Quasi‐geostrophic mesoscale eddies regularly impinge on the Kuroshio in the western North Pacific, but the processes underlying the evolution of these eddy‐Kuroshio interactions have not yet been thoroughly investigated in the literature. Here this interaction is examined with results from a semi‐idealized three‐dimensional numerical model and observations from four pressure‐sensor equipped inverted echo sounders (PIESs) in a zonal section east of Taiwan and satellite altimeters. Both the observations and numerical simulations suggest that, during the interaction of a cyclonic eddy with the Kuroshio, the circular eddy is deformed into an elliptic shape with the major axis in the northwest‐southeast direction, before being dissipated; the poleward velocity and associated Kuroshio transport decrease and the sea level and pycnocline slopes across the Kuroshio weaken. In contrast, for an anticyclonic eddy during the eddy‐Kuroshio interaction, variations in the velocity, sea level, and isopycnal depth are reversed; the circular eddy is also deformed to an ellipse but with the major axis parallel to the Kuroshio. The model results also demonstrate that the velocity field is modified first and consequently the SSH and isopycnal depth evolve during the interaction. Furthermore, due to the combined effect of impingement latitude and realistic topography, some eddy‐Kuroshio interactions east of Taiwan are found to have remote effects, both in the Luzon Strait and on the East China Sea shelf northeast of Taiwan.

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Effects of the STCC eddies on the Kuroshio based on the 20-year JCOPE2 reanalysis results

Cited by 47 publications

References 36 publications

Interannual modulation of eddy kinetic energy in the northeastern South China Sea as revealed by an eddy‐resolving OGCM

Interannual modulation of eddy kinetic energy in the northeastern South China Sea as revealed by an eddy‐resolving OGCM

The Kuroshio and Luzon Undercurrent East of Luzon Island

Eddy‐Kuroshio Interactions: Local and Remote Effects

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