Satellite altimeter monitoring the Kuroshio Transport south of Japan

Imawaki, Shiro; Uchida, Hiroshi; Ichikawa, Hiroshi; Fukasawa, Masao; Umatani, Shin-ichiro

doi:10.1029/2000gl011796

Cited by 159 publications

(102 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such monitoring could involve its total transport across a meridional section off Cape Hatteras -as done systematically by the Japan Meteorological Agency for the Kuroshio (Imawaki et al 2001) -as well as the SST and SSH gradients across such a section.…”

Section: B Discussionmentioning

confidence: 99%

Interannual Variability in the North Atlantic Ocean’s Temperature Field and Its Association with the Wind Stress Forcing

et al. 2017

View full text Add to dashboard Cite

Spectral analyses of the North Atlantic temperature field in the Simple Ocean Data Analysis (SODA) reanalysis identify prominent and statistically significant interannual oscillations along the Gulf Stream front and in large regions of the North Atlantic. A 7-8-yr oscillatory mode is characterized by a basin-wide southwest-to-northeast-oriented propagation pattern in the sea surface temperature (SST) field. This pattern is found to be linked to a seesaw in the meridional-dipole structure of the zonal wind stress forcing (TAUX). In the subpolar gyre, the SST and TAUX fields of this mode are shown to be in phase opposition, which suggests a cooling effect of the wind stress on the upper ocean layer. Over all, this mode's temperature field is characterized by a strong equivalent-barotropic component, as shown by covariations in SSTs and sea surface heights, and by phase-coherent behavior of temperature layers at depth with the SST field. Recent improvements of multivariate singular spectrum analysis (M-SSA) help separate spatio-temporal patterns. This methodology is developed further and applied to studying the ocean's response to variability in the atmospheric forcing. Statistical evidence is shown to exist for other mechanisms generating oceanic variability of similar 7-8-yr periodicity in the Gulf Stream region; the latter variability is likewise characterized by a strongly equivalent-barotropic component. Two other modes of biennial variability in the Gulf Stream region are also identified, and it is shown that interannual variability in this region cannot be explained by the ocean's response to similar variability in the atmospheric forcing alone.

show abstract

Section: B Discussionmentioning

confidence: 99%

Interannual Variability in the North Atlantic Ocean’s Temperature Field and Its Association with the Wind Stress Forcing

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The eastward volume transport of the Kuroshio south of Japan consists of two parts: one is related to basin-scale wind stresses and the other is related to the anticyclonic recirculation gyre, which is a local current system south of the Kuroshio (Hasunuma and Yoshida, 1978). Imawaki et al (2001) ASUKA. Ichikawa et al (2004) also noted its influences on the Ryukyu Current and attributed the increase in volume transport from section OK (Zhu et al, 2004) to a section southeast of Amami island to the presence of the Kuroshio recirculation.…”

Section: Current Fields At the Five Sectionsmentioning

confidence: 99%

Spatial variations in the Kuroshio nutrient transport from the East China Sea to south of Japan

Guo

Zhu²,

Yu³

et al. 2013

Biogeosciences

View full text Add to dashboard Cite

Abstract. Based on absolute geostrophic velocity, which was calculated using repeated hydrographic data of 39 cruises from 2000 to 2009 and nitrate concentrations measured in the same areas from 1964 to 2009, we obtained the temporally averaged nitrate flux (the product of velocity and nitrate concentration) and nitrate transport (integration of flux over one section) of four sections across the Kuroshio from the East China Sea (sections PN and TK) to an area south of Japan (sections ASUKA and 137E). In addition, we examined section OK east of the Ryukyu Islands in order to understand how the Ryukyu Current contributes to the

show abstract

“…Through the Tokara Strait between Yakushima Island and AmamiOhshima Island, the Kuroshio flows into the south of central Japan where its path varies greatly. By the combined use of the data obtained by the altimeter on TOPEX/ POSEIDON (T/P) satellite, moored current-meters and hydrographic surveys on the ASUKA-line across the Kuroshio south of the central Japan (KSCJ), Imawaki et al (2001) estimated the 1992-1999 mean absolute volume transport in the top 1000 m layer of the Kuroshio Through Flow north of 26°N to be 42 Sv. This large difference between volume transports of the KECS and KSCJ suggests that the KSCJ should have other sources than KECS.…”

Section: Introductionmentioning

confidence: 99%