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Volume 10 (1954)
- Issue 4 Pages 175-
- Issue 3 Pages 87-
- Issue 2 Pages 49-
- Issue 1 Pages 1-
Volume 10, Issue 1
Displaying 1-6 of 6 articles from this issue
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H. MIYOSHI1954 Volume 10 Issue 1 Pages 1-9
Published: May 25, 1954
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSIn this paper is given a theoretical investigation of a disturbance which may occur on the surface of the sea as the effect of an elevation or a depression of the bottom. The water is thought to be compressible and the sea floor is assumed to be consisted of a rigid substance. It is shown that the sea surface oscillates up and down as the result of waves of expansion occuring in the water by the dislocation of the bottom. The period of oscillation depends upon the depth of the water and is of the same order as, that of usual swell.View full abstractDownload PDF (885K) -
Hisashi MIYOSHI1954 Volume 10 Issue 1 Pages 11-14
Published: May 25, 1954
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSThe destructive energy of the larger tsunami which accompanies the earthquake is about 1023 ergs. But the exchanged energy between the sea water and the crust is far beyond this value, and is perhaps comparable to or larger than the whole energy of the seismic waves which is sometimes 1025-1026 ergs. Concerning this pointing out, the author should like to refer to the gravitational wave energy which has recently been described rather ambiguously.View full abstractDownload PDF (379K) -
On the Mechanism of the Decay of Foam Layer of Sea Water (Part 3)TOMOSABURO ABE1954 Volume 10 Issue 1 Pages 15-21
Published: May 25, 1954
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSOn the standpoint of energy, the author discussed the phenomenon of the decay of foam layer of sea water and obtained the following results.
In the process of the decay of foam layer, he has considered the same quantity “A” as the activation energy in chemical changes. “A” increases with increasing concentration, up to a certain maximum, and then decreases with further increase of concentration.View full abstractDownload PDF (697K) -
Y. SUGIURA1954 Volume 10 Issue 1 Pages 22-28
Published: May 25, 1954
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSIn eutropic lakes or coastal waters, a marked diurnal variation of oxygen content is found. There are two types of variations. In one of them, a minimum occurs mostly at about 6h and a maximum at about 17h. This type of variation is often seen in stable and homogeneous water masses. In the other type, minimum and maximum occur at different hours from the foriner. In this case, the influence of diffusion and advection or convection upon the diurnal variation of oxygen content must be considered. In this paper, the former case was chiefly treated. In this case, the amplitude of the diurnal variation depends upon the intensity of radiation, the duration of insolation, water temperature, number and size of phytoplanktons and etc.
Indeed, the amplitude is larger on a clear day than on a cloudy day and it is also larger in summer than in winter. It was obtained by the calculation that the diurnal variation should have a minimum and a maximum respectively at a certain time distance before and after the noon. By using the data of the diurnal variations of dissolved oxygen, the amount of the oxygen production or consumption during a whole day was computed.
Assuming a certain size and number of phytoplanktons, these values agreed well with those observed.View full abstractDownload PDF (613K) -
Otohiko TANAKA1954 Volume 10 Issue 1 Pages 29-39
Published: May 25, 1954
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSCalanus plumchrus Marukawa has been believed to be a distinct species in Japan. On closer examination of the adult specimens of the species, taken from the deep waters of the Japan Sea, it revealed that Calanus plumchrus is the immature specimen of Calanus tonsus Brady.View full abstractDownload PDF (1279K) -
Y. KAWARADA1954 Volume 10 Issue 1 Pages 40-42
Published: May 25, 1954
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSFrom the results of twenty-four succesive hourly observations at one point 500 meters off the mouth of the River Sagami, in Sagami Bay, the trajectories of observed water masses were followed up to give the original localities.
From these localities horizontal distribution of plankton and water temperature are presumed, giving the reasonable results: plankton density is high near the mouth of the river, and decreases gradually toward the offing.
This distribution of plankton correspond with that of hydrographical conditions; i.e. the distribution of water temperature, chlorinity and oxygen content.View full abstractDownload PDF (343K)
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