All issues
Volume 36 (1980 - 198･･･
- Issue 6 Pages 275-
- Issue 5 Pages 231-
- Issue 4 Pages 177-
- Issue 3 Pages 141-
- Issue 2 Pages 97-
- Issue 1 Pages 1-
Volume 36, Issue 2
Displaying 1-6 of 6 articles from this issue
- |<
- <
- 1
- >
- >|
-
Masaki KAWABE1980 Volume 36 Issue 2 Pages 97-104
Published: May 30, 1980
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSSea level variations from 1974 through 1976 at 9 stations on the south coast of Japan (from west to east, Aburatsu, Tosa-shimizu, Muroto-misaki, Kushimoto, Uragami, Owase, Toba, Maisaka and Omaezaki) were analysed in relation to the large meander in the Kuroshio.
From May to July in 1975, a small maximum in sea level variation was observed at every station west of Cape Shionomisaki from Aburatsu to Kushimoto. It propagated eastward along with the eastward propagation of a small meander in the Kuroshio until it reached Kushimoto, when the sea levels at Uragami and Owase started to rise sharply. This remarkable rise appeared at all stations in August when a large meander in the Kuroshio was established. The mean sea level at the stations east of Cape Shionomisaki from Uragami to Omaezaki rose by about 10 cm. The difference in sea level variations between the regions east and west of Cape Shionomisaki, which had been present before the rise, disappeared. A similar characteristic of sea level variation was also found in the generation stage of the large meander in 1959.
The sea level variations along the south coast of Japan indicate that, prior to the generation of the large meander, the small meander in the Kuroshio was generated southeast of Kyushu and propagated eastward and that, just when this meander reached off Cape Shionomisaki, a large scale oceanic event covering over the whole region of the south coast of Japan occurred. This large scale event seems to be one of the necessary conditions for the generation of the large meander in the Kuroshio off Enshû-nada.View full abstractDownload PDF (1390K) -
II. Integral RelationshipTakashi ICHIYE1980 Volume 36 Issue 2 Pages 105-120
Published: May 30, 1980
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSNon-dimensional equations of motion are derived for the A. C. C. of the barotropic mode, including the bottom friction and the horizontal eddy viscosity. Integration of the vorticity equation along a streamline leads to the zeroth order stream function which is dependent only on depth divided by Coriolis parameter. Integration of the momentum equation along a streamline yields the relation between the momentum input by wind stress and its dissipation by the bottom friction and by the horizontal eddy viscosity. This relation determines the magnitude of the stream function. It explains differences in the total transport of the A.C.C. obtained by BRYAN and COX (1972), though it gives only one third of the total transport obtained by KAMENKOVICH (1972) with his vertical eddy viscosity of 102cm2 s-1. With 1 cm2 s-1 of this viscosity, BRYAN and Cox obtained the transport of about 650 or less than 32×106 m3 s-1 for constant or variable depth models, respectively. The higher transport is mainly due to broadening of the width of the A. C. C., whereas the lower value is due to its narrowing and meandering which in turn make the horizontal eddy viscosity more effective (by exercising friction on both sides of the A. C. C.) and the wind stress input smaller than the almost zonal streamlines for constant depth. In the Appendix dynamics of the bottom boundary layer is treated to give rational estimates of the bottom stress in terms of the geostrophic flow and is compared to the recent observations of the benthic boundary current in the Straits of Florida and off San Diego.View full abstractDownload PDF (2540K) -
Osamu MITAMURA, Yatsuka SAIJO1980 Volume 36 Issue 2 Pages 121-125
Published: May 30, 1980
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSRates of urea supply from the decomposition and the excretion of zooplankton were determined for samples collected in Suruga Bay. Five species of zooplankton were incubated in filtered seawater at 20°C for 276 hrs after being forced to die in a refrigerator. More than 77.6% of body nitrogen of the zooplankton was liberated, except for Euphausia similis, which showed a lower decomposition rate of 53.0%. In the liberated nitrogen, 4.8 to 9.8% was determined as urea.
Incubation experiments of two species of zooplankton at 13°C during 12 hrs, showed that the organisms excreted 0.86 and 0.73μg-at. N indi.-1 d-1 as total soluble nitrogen. Urea accounted for 8.3 and 6.8% of the excreted total soluble nitrogen.View full abstractDownload PDF (792K) -
Ryuzo MARUMO1980 Volume 36 Issue 2 Pages 126-133
Published: May 30, 1980
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSOver the past 30 years, I have carried out research on the distribution and ecology of marine plankton using research vessels of the Japan Meteorological Agency and the Ocean Research Institute mainly in the Kuroshio and Oyashio areas as well as in Sagami Bay. In this report, some results obtained on the ecological features of blue-green algae, diatoms, chaetognaths etc. in relation to water masses and currents are shown.View full abstractDownload PDF (1763K) -
Masahiro ENDOH1980 Volume 36 Issue 2 Pages 134-140
Published: May 30, 1980
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSSummarized is the author's study of the ocean circulation dynamics with numerical models, for which he was honored by the Okada Prize (1979). Cited topics are formation of the western boundary current and its variation associated with imposed wind stress, some effects of a marine ridge on the boundary current, coastal upwelling circulation and coastal thermohaline front formation. Recent modelling efforts in Japan, specifically on numerical study of ocean circulation dynamics are also reviewed.View full abstractDownload PDF (5463K) -
1980 Volume 36 Issue 2 Pages e1
Published: 1980
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSDownload PDF (51K)
- |<
- <
- 1
- >
- >|