Journal of the Oceanographical Society of Japan
Online ISSN : 2186-3113
Print ISSN : 0029-8131
ISSN-L : 0029-8131
Search
Advanced search
OR
Browse
Search
Volume 26, Issue 4
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • The Chemical Composition and the Cadmium, Chromium and Vanadium Contents of Shallow-Water Deposits in Tokyo Bay
    Masayoshi ISHIBASHI, Shunzo UEDA, Yoshikazu YAMAMOTO
    1970 Volume 26 Issue 4 Pages 189-194
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02753893
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The major elements and the minor elements cadmium, chromium and vanadium in 12 samples of shallow-water deposits collected in Tokyo Bay were studied. Average silica content of the deposits is 53.93%, which is approximate to the average of 54.15% of red clay. Iron (ay. 5.67% Fe203), titanium (ay. 0.71% Ti02), especially manganese (ay. 0.87% MnO), are more abundant in the deposits than in the deposits along the entire seacoasts of Honshu and of Nanao Bay, Japan. The deposits show higher contents of cadmium (ay. 0.61 ppm), the chromium (ay. 86 ppm) and vanadium (ay. 79 ppm). About 3 to 17 times cadmium and manganese contents compared with those in the deposits along the sea-coasts of Honshu and of Nanao Bay, Japan was found. Such accumulation of cadmium and manganese in the deposits is probably caused by artificial contamination rather than of natural origin. No relation was found between the contents of cadmium, chromium and vanadium and those of major elements.
    View full abstract
    Download PDF (949K)
  • On the Nauplius of Centropages yamadai MORI, Copepoda
    Fumihiro KOGA
    1970 Volume 26 Issue 4 Pages 195-202
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799395
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The nauplius of C. yamadai shows the shape of typical Centropages nauplius, as in C. hamatus and C. abdominalis. The nauplii of genus Centropages are oval in shape; somewhat rounded anteriorly and slightly pointed posteriorly. The rostrum is comparatively large. A nauplius eye is large at the proximal portion of the rostrum. There is a labrum with the minute spines on its posterior border. The antennule of 3 segments is oar-liked in outline as in Calanus, but on the ventral margin of terminal segment there is no seta. The abdominal portion is not divided from the carapace like that of Temora or Calanus. There is no dorso-ventral flexure. The furcal setae are thick and long, and asymmetrical. An end seta which presents just dorsally against to a median seta, elongates backwards.
    The nauplius of C. yamadai can be distinguished from nauplii of other species by the structure of appendages in the respective stages, but this nauplius is easily identified by the coloured body.
    View full abstract
    Download PDF (868K)
  • A Numerical Calculation of the Wind-driven Circulation in the Gulf of St. Lawrence
    T.S. MURTY, J.D. TAYLOR
    1970 Volume 26 Issue 4 Pages 203-214
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799396
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The steady state surface circulation in the Gulf of St. Lawrence due to wind field forcing was calculated taking the topography into account using numerical techniques for each month of two ten year periods, 1940-49 and 1951-60. This model did not take into consideration the ice layer on the water surface and hence is not valid for the winter months. Most of the observed circulation features except the Gaspe current were reproduced satisfactorily.
    View full abstract
    Download PDF (3962K)
  • Finite Vertical Oscillation of Fluid Parcel in a Heterogeneous, Incompressible Sea Water-Part I
    Theoretical Consideration
    Masahide TOMINAGA
    1970 Volume 26 Issue 4 Pages 215-225
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799397
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The solutions of vertical oscillation of finite amplitude of a fluid parcel in a heterogeneous, incompressible sea water were obtained, solving rigorously the equation of motion, retaining small terms to the third order of the amplitude non-dimensionized by a vertical reference length. The motion is asymmetric with respect to its equilibrium position and the period of motion is longer than that of infinitesimal Vaisala oscillation. When the vertical velocity of the parcel exceeds certain critical value, oscillation of large amplitude sets in near the outskirts of the thermocline, its period being more than twice larger than that of Väisälä. oscillation. The apprehension whether this type of the increased vertical motion might be influenced or denied by the horizontal motion in such a case as in internal waves is also discussed. From some observations which will be appeared in Part II, we found oscillations of large amplitude with the period which is in good agreement with the theoretical result.
    View full abstract
    Download PDF (1380K)
  • Measurements of Vertical Air Temperature Gradients with Dipmeter
    Yositada TAKENOUTI, Masaaki HYUGA, Yurin SAKAMOTO
    1970 Volume 26 Issue 4 Pages 226-232
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799398
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    By means of measuring the dips of horizon with a Pulfrich dipmeter, vertical air temperature gradients near the sea surface were obtained with an accuracy of ca.±0.01°C/m, much better than a conventional method with an array of temperature sensors. The additional advantage of this technique was that the measurements were made on board a ship underway, consequently data from wide oceanic areas could be accumulated rather quickly and easily. From the results of dip measurements at 125 stations on two cruises of the T/V Oshoro Maru of the Hokkaido University, extending from the Bering Sea to the south of Australia, the temperature gradients were computed with a new formula with an assumption that the refractive index of air varied with a height only. It was found that, in the northern North Pacific Ocean, vertical air temperature gradients were positive, while in the subtropical and tropical Pacific Ocean both the negative and positive gradients were observed. Generally, in the same sea. region, the temperature profiles had the similar form, irrespective of air-sea temperature differences.
    View full abstract
    Download PDF (959K)
  • A Note on the Wave Set-Up, Longshore Currents and Undertows
    Noriyuki IWATA
    1970 Volume 26 Issue 4 Pages 233-236
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799399
    JOURNAL FREE ACCESS
    Download PDF (398K)
  • [title in Japanese]
    Koji HIDAKA
    1970 Volume 26 Issue 4 Pages 237-241
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799400
    JOURNAL FREE ACCESS
    Download PDF (1220K)
  • [title in Japanese]
    Makoto OMORI
    1970 Volume 26 Issue 4 Pages 242-252
    Published: August 31, 1970
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.1007/BF02799401
    JOURNAL FREE ACCESS
    Download PDF (1873K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top