Biological productivity of meso-scale eddies caused by frontal disturbances in the Kuroshio

Kimura, Shingo; Kasai, Atsushi; Nakata, Hideaki; Sugimoto, Takashige; Simpson, John H.; Cheok, Joseph V. S.

doi:10.1006/jmsc.1996.0209

Cited by 70 publications

(85 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[43] A similar mechanism has been described for several western boundary currents, where eddies and meanders over the continental slope ''pump'' nutrients onto the continental shelf and thereby promote a significant proportion of the shelf productivity off the southeast USA [Yoder et al, 1981;Lee and Atkinson, 1983;Lee et al, 1989Lee et al, , 1991, Brazil [Campos et al, 2000], Japan [Kimura et al, 1997], and eastern Australia [Tranter et al, 1986;Harris et al, 1987]. The western boundary currents are often notably low in nutrients, yet the eddy and meander structures promote shelf productivity through eddy-induced upwelling along the shelf break, because the nitricline is lifted upward toward the continental shelf.…”

Section: Discussionmentioning

confidence: 82%

“…Meanders and eddies spin up during the autumnwinter period and often continue to evolve through winter, to be either reabsorbed or shed into the interior of the eastern Indian Ocean and drift westward Fang and Morrow, 2003]. Western boundary current eddies and meanders have been shown to contribute significantly to the productivity of the continental shelves off the southeastern USA [Yoder et al, 1981;Lee and Atkinson, 1983;Lee et al, 1989Lee et al, , 1991, Brazil [Campos et al, 2000], Japan [Kimura et al, 1997], and eastern Australia [Tranter et al, 1986;Harris et al, 1987], but the impact of eddies off the coast of Western Australia on shelf productivity has not been previously examined.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of the Leeuwin Current on phytoplankton biomass and production off Southwestern Australia

et al. 2008

View full text Add to dashboard Cite

[1] Unlike most eastern boundary currents, the Leeuwin Current off the west coast of Australia flows poleward and is therefore warm, nutrient-poor and suppresses upwelling. As a result, the waters off Western Australia are relatively oligotrophic. Primary productivity and concentrations of chlorophyll are particularly low in summer, when the water column is stratified and most chlorophyll is concentrated in a layer above the nutricline at approximately 100 m depth. The phytoplankton blooms in late autumn and winter, coinciding with the period of strongest Leeuwin flow. The bloom in winter is maintained by cooling and storms, which promote convective mixing of the upper water column and a shoaling of the nutricline and chlorophyll maximum layer. However, the late autumn bloom coincides with the initial intensification of the Leeuwin Current. Eddies and meanders spin up just beyond the shelf break, and Leeuwin Current water was observed at this time to destratify the water column and flood the shelf with relatively nutrient-rich water. Several potential sources for the nutrients are proposed: upwelling by the eddies and meanders as they induce cross-shelf motions; advection from the north, where the nutricline is shallower; and seasonal cooling.

show abstract

Section: Discussionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

The effect of the Leeuwin Current on phytoplankton biomass and production off Southwestern Australia

et al. 2008

View full text Add to dashboard Cite

show abstract

“…The frontal waves stimulate exchange between coastal waters off the southern coast of Japan and the waters of the Kuroshio. Because of the water exchange, the short-term fluctuations affect the supply of nutrients (Kimura et al 1997), primary production (Kimura et al 1997;Ramp et al 2008), and fishery conditions (Kimura and Sugimoto 1987;Kasai et al 2002;Waseda and Mitsudera 2002;Okazaki et al 2003). A fluctuation of a period of around 50-to 70-day, which is another fluctuation, is related to the S-shaped meandering pattern of the Kuroshio around the Izu Ridge (Kasai et al 1993;Mitsudera et al 2006;Takahashi et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, descriptions of short-term fluctuations in the Kuroshio are intermittent. Satellite data of sea surface temperature (SST) and sea surface heights (SSH), which have good spatial coverage, have been used in studies on short-term fluctuations (Kasai et al 1993;Kimura et al 1997;Takahashi et al 2011Takahashi et al , 2012. Obtaining SST images from satellites, however, is often hampered by clouds.…”

Section: Introductionmentioning

confidence: 99%

Short-term fluctuations south of Japan and their relationship with the Kuroshio path: 8- to 36-day fluctuations

Miyama

Miyazawa

2014

Ocean Dynamics

View full text Add to dashboard Cite

To detect short-term fluctuations south of Japan, we applied wavelet analysis to ocean reanalysis data of the Japan Coastal Ocean Predictability Experiment 2 with a horizontal resolution of 1/36°. It was found that fluctuations of the 8-to 36-day period band appear as frontal waves in the Kuroshio Current. The amplitude of the fluctuations increases toward the downstream of Cape Shionomisaki. The fluctuations have a wavelength of about 300 km, and the signals propagate eastward. The fluctuations of the 8-to 36-day period band are stronger during the period of the nearshore non-largemeander Kuroshio path than during the period of the offshore non-large-meander Kuroshio path. We suggest that the 8-to 36-day fluctuation is a result of the instability of the accelerated velocity of the Kuroshio Current downstream of Cape Shionomisaki.

show abstract

“…The area between the Kuroshio and Oyashio is known as the Kuroshio-Oyashio transition area, where the warm Kuroshio water and cold Oyashio water converge, generating a variety of complex hydrographic features (Kawai 1972, Olson 2001, Yasuda 2003. As a consequence of this highly dynamic ocean environment, the Kuroshio-Oyashio transition area represents one of the most productive zones in terms of carbon in the World Ocean (Kimura et al 1997, Qiu 2001, Yasuda 2003, Sakurai 2007. Streaked shearwaters from both Sangan (SA) and Mikura (MK) Islands -located ca.…”

Section: Introductionmentioning

confidence: 99%

Foraging areas of streaked shearwaters in relation to seasonal changes in the marine environment of the Northwestern Pacific: inter-colony and sex-related differences

Yamamoto

Takahashi²,

Oka³

et al. 2011

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

As the spatial distribution of marine organisms is often affected by seasonal changes, pelagic seabirds may change their foraging areas in response to seasonal changes in the marine environment. Here, we examined the foraging area of streaked shearwaters Calonectris leucomelas, breeding at Sangan (SA) and Mikura Islands (MK), Japan, from spring to summer during pre-laying and incubation periods. Those colonies are located at the north and south of the Northwestern Pacific's Kuroshio-Oyashio transition area where high seasonal temperature changes are observed, and where, consequently, birds may show comparable responses to such changes. Our results showed that streaked shearwaters from both colonies shifted their foraging areas northwards as the season progressed. The seasonal shift of foraging areas appeared to coincide with the movement pattern of pelagic fishes that migrate northward in association with the increase in water temperature. However, the pattern of seasonal movement differed between the 2 colonies; shearwaters from SA moved their foraging area along the coastal area of the Kuroshio-Oyashio transition, while those from MK moved along the Kuroshio Extension. Our results also indicated sex-related differences in this general pattern: females showed clear seasonal changes in foraging area, while males did not. During the pre-laying period males returned to the colony frequently to defend their nests or mates, and spent less time at sea. Our results suggest that streaked shearwaters changed their foraging areas in response to seasonal changes in the marine environment, although colony location and sex-related differences in reproductive roles may constrain the birds' responses to seasonal change.

show abstract

Biological productivity of meso-scale eddies caused by frontal disturbances in the Kuroshio

Cited by 70 publications

References 11 publications

The effect of the Leeuwin Current on phytoplankton biomass and production off Southwestern Australia

The effect of the Leeuwin Current on phytoplankton biomass and production off Southwestern Australia

Short-term fluctuations south of Japan and their relationship with the Kuroshio path: 8- to 36-day fluctuations

Foraging areas of streaked shearwaters in relation to seasonal changes in the marine environment of the Northwestern Pacific: inter-colony and sex-related differences

Contact Info

Product

Resources

About