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Volume 24 (1968)
- Issue 6 Pages 265-
- Issue 5 Pages 195-
- Issue 4 Pages 147-
- Issue 3 Pages 87-
- Issue 2 Pages 41-
- Issue 1 Pages 1-
Volume 24, Issue 2
Displaying 1-5 of 5 articles from this issue
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Masahiro KAJIHARA1968 Volume 24 Issue 2 Pages 41-44
Published: April 30, 1968
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA sampler that is consisted of an air tank and a junction chamber has been designed to collect the waters of about one hundred ml from each vertically five adjacent depths into the junction chamber by hydrostatic pressure. Also the waters of larger volume can be obtained into the separated bottles from the chamber. This sampler is quite useful for research not only in shallow water, estuary and lake, but also for sampling waters near sea surface and sea floor.View full abstractDownload PDF (2176K) -
Tadayoshi SASAKI, Noboru OKAMI, Motoaki KISHINO, Gohachiro OSHIBA1968 Volume 24 Issue 2 Pages 45-50
Published: April 30, 1968
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSMeasurements of the irradiance and scalar irradiance were made using an under-water irradiance meter and an underwater scalar irradiance meter at Sagami Bay and the East China Sea, adjacent regions of the Kuroshio. From these data, we calculated the values of volume absorption function, reflectance function and diffuse attenuation functions for scalar irradiance and irradiance. It is considered that the value of a=0.042-0.049m-1 obtained from the upper layer in the East China Sea is that of the absorption coefficient at wave length 550 mμ of the water, on which the Kuroshio has influences.View full abstractDownload PDF (3139K) -
Noriyuki IWATA1968 Volume 24 Issue 2 Pages 51-53
Published: April 30, 1968
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSAn expression for the diabatic wind profile in surface boundary layer is examined from dimensional reasoning and shown that the modification of mixing length due to stability can not be disregarded in order to consider the wind profile.View full abstractDownload PDF (259K) -
On the Distribution of Chemical Elements in a Kind of Shore Fishes; Cheorodon azurio (JORDAN & SNYDER)Noboru IMANISHI1968 Volume 24 Issue 2 Pages 54-59
Published: April 30, 1968
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSThe distribution of chemical elements in a kind of shore fish; Cheorodon azurio or Ira in Japanese common name will be reported in this paper.
Main constituents are alkali and alkaline earth metals and phosphorus. The total quantity of Na, K, Ca and Mg as oxide amounts to 48-55% and that of P as oxide to 40-50% in ashes.
Among miner constituents Fe and Al are most abundant and the quantity of these is 1.0-31.0 × 10-5 g. atom per 1 g of ashes respectively.
Secondary less abundant are Zn and Cu, and the quantity Zn is 0.4-2.6 × 10-5 g. atom and that of Cu is less than 0.5 × 10-5 g. atom per 1 g of ashes respectively.
Mn, Pb and Sn are also found but these are considered as trace element in this fish.
The distribution tendency of each of these minor elements in inner organ, flesh and hard part seems to have specific type as follows in ratio of quantity.
Al, Zn, Sn-Inn. org. > Flesh > Hard part
Fe, Cu, Mn-Inn. org. >> or > Flesh < Hard part
Pb-Inn. org. << Flesh < Hard part
The general tendency of distribution of chemical elements in shore fish “Ira” shows similarity to that in migratory fish but some differences are also found in details.View full abstractDownload PDF (695K) -
Akira OKUBO1968 Volume 24 Issue 2 Pages 60-69
Published: April 30, 1968
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSThe shear effect means that the combined action of the variable mean current and transverse mixing produces an effective longitudinal diffusion. It has recently become apparent that current shear can play an important role in the horizontal spread of contaminants in the sea. By the use of a simple model for the shear effect, we can interpret most of the features of dye-release experiments, such as the shape of a dye patch and the behaviors of the peak concentration with time. The model has some intimate relations to various theoretical models developed on the basis of purely random movements of water. Some other aspects of the shear effect are also discussed. They are i) the horizontal spread of minute particles whose density is not equal to that of the ambient water, and ii) longitudinal diffusion in an oscillatory current with shear. A possible role of the shear effect in both large-scale and small-scale mixing in the sea is suggested.View full abstractDownload PDF (1572K)
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