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Volume 17 (1955 - 195･･･
- Issue 3 Pages 1-
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Volume 17, Issue 3
Displaying 1-5 of 5 articles from this issue
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M. KURODA, C. GONDAIRA1956 Volume 17 Issue 3 Pages 1-9
Published: 1956
Released on J-STAGE: January 20, 2010
JOURNAL FREE ACCESSThe most important factor in the studies of various phenomena of deposited snow, such as avalanche or melting, is the physical quality of the snow concerned. The deposited snow is traditionally divided into several kinds of nominations according to the intuitive judgement. But it is necessary to know whether there are distinct differences of physical qualities among them. If there is any distinct difference in physical measurement a new classification based upon the objective measurement will become available.
With specimens collected at various places we measured four physical qualities, density, hardness, grain size and temperature, making a collection of many measured values. We measured the four physical qualities with six kinds of specimens, classified by the traditional intuitive method. And by so doing we here tried to establish some standards for the classification of deposited snow based upon the objective measured values.View full abstractDownload PDF (1681K) -
R. INOUE, K. MIYAZAKI, R. SANBONGI1956 Volume 17 Issue 3 Pages 10-14
Published: 1956
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSFor the study of the relation between the weight of snow cover per unit area Measured by a snowtube and the inner diameter of the tube, the authors carried samplings by some snow-tubes of different diameters.
When the layer of granular snow existed in the snow cover, there were contraction on the length of the snow core sampled in the snow-tube and the decrease in the weight of the sampled snow per unit area compared with the depth and the weight per unit area of the snow cover ; the smaller the inner diameter of the tube, the more the length contracted and the weight decreased.
These phenomena were not found in case the layer of granular snow did not exist, therefore the authors concluded that these phenomena were concerned with the flow out of the grain of snow from the sampling domain in the layer of the granular snow while sampling.
From samplings of the snow cover of about 40cm depth by two snow-tubes of different inner diameter (76. 9mm and 23. 7mm), it was found that the ratio of the length of snow cores correlated fairly well with the ratio of the weight of sampled snow per unit area.
The relations were given by the following empirical formula.
m-Δm1(h-a1)=m-Δm2(h-a2)
where m; weight of snow cover per unit area,
h; depth of snow cover,
Δm1, Δm2; decrease of the weight of snow per unit area from m measured by the snow-tubes of inner diameters φ1 and φ2.
a1, a2; contraction of the length of snow core from h in the snow tubes of inner diameters φ1 and φ2.View full abstractDownload PDF (874K) -
I. FURUKAWA1956 Volume 17 Issue 3 Pages 15-17
Published: 1956
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSThe author studied the vertical pressure distribution of creeping snow cover on a sloping ground.
The profiles of measured pressure distribution may be classified into two types, such as D and B type shown in figure 1.
The moment of force that turn over the pole is the product of total pressure acting upon the pole and the height from the ground surface of the center of figure on pressure force elevation.
This height of the maximum moment was estimated to be 3040% of the maximum depth of snow cover in year.View full abstractDownload PDF (532K) -
A. KONNO, A. IMAI, K. MARUYAMA1956 Volume 17 Issue 3 Pages 18-20
Published: 1956
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESS1. On the proccess of cornice growth.
When wind blows at the speed of 11 m/sec., the cornice at the mountain top grows at the rate of 4 cm/10 minutes. Growing about 20 cm long, the cornice looks always like the plate, which bends downward by its own weight. While the snow-storm continues, the cornice keeps on growing.
2. On the change of wind velocity by using the almost closed fence.
The wind velocity at the top of the fence is 1. 4 times larger than that of the other parts.
3. On the state of wind stream by using the fence which has a gap in its own bottom.
When the fence gap is 70 cm in width, we find different phenomenon of wind stream between 0.5m and 1. Om under the top of the fence.
4. On the state of snow which passes through the gap of the fence bottom.
After passing through the fence gap, the snow-flake flies about 10m-15m in distance.View full abstractDownload PDF (427K) -
[in Japanese]1956 Volume 17 Issue 3 Pages 37-39
Published: 1956
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSDownload PDF (677K)
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