A numerical study of the seasonal circulation in the Seto Inland Sea, Japan

Seasonal and interannual variations in the abundance of jellyfish in a southern coastal waters of Iyo-Nada, Japan: Influence of cyclonic gyre transport

“…The present results concerning the residual current at station PC off the coast of Ikata in May and August indicated that eastward flow occurs in most years. Dominance of the eastward flow in the southern part of Iyo-Nada during the stratification period was also revealed by Chang et al (2009). Since the eastward current observed at station PC is considered as a part of the cyclonic gyre developed in IyoNada during the stratification period (Guo et al 2005), it is deduced that the strength of the cyclonic gyre determines the transport of jellyfish in this coastal area.…”

“…They concluded that the year 2004 was an abnormal year because large fresh water inputs, due to several typhoons, intensified the basin-scale Guo et al s (2006) data and our own data confirm that the eastward flow along the south coast of the central part of Iyo-Nada is part of the cyclonic gyre in Iyo-Nada, and therefore that the year-to-year fluctuation in the strength of the gyre can be regarded as a main factor causing the interannual variation in jellyfish abundance in the present study field. Chang et al (2009) showed the cyclonic gyre develops from April to October but not in November. The present results concerning the residual current corresponds with their results, that is, the direction of the residual current was westward in November in many years, in contrast to the dominance of eastward flows in May and August.…”

“…Guo et al (2006) made intensive observations of the currents in the summer of 2005 and showed a cyclonic (anti-clockwise) gyre which accompanies the development of cold bottom water in Iyo-Nada. Based on a numerical study of the seasonal circulation in the Seto Inland Sea, Chang et al (2009) showed that the cyclonic gyre in Iyo-Nada usually develops from April to October. The structure of the cyclonic gyre is similar to that observed in the western Irish Sea (Hill et al 1994), which was shown to affect the transport of plankton and the distributions of pelagic juvenile fish (Dickey-Collas et al 1997, Hill et al 1996, White et al 1988.…”

Parameter optimization of a 3D coastal model using Green's functions for modelling river plume dynamics

“…This is the first case to apply POMgcs to simulate tidal currents and river plume around Kojima Bay, while tidal and residual currents in the Seto Inlans Sea are simulated using POM [3] in previous studies (e.g. [6,4]). The Coriolis parameter is 8 × 10 −5 s −1 at a latitude of 34°.…”

Ensemble numerical forecasts of the sporadic Kuroshio water intrusion (kyucho) into shelf and coastal waters

“…4). Sidewall boundaries are imposed at Hayasui Strait and Awaji Island because the throughflow that may alter circulation in the model domain is unclear around these narrow straits (~10 km width) (Chang et al 2009) and because there is no way of knowing current and hydrographic conditions in these straits during the course of the hindcast/forecast computations; note that the JCOPE2 analysis does not provide us with oceanic conditions within the shallow Seto Inland Sea. Run 5…”