Journal of the Japanese Society of Snow and Ice
Online ISSN : 1883-6267
Print ISSN : 0373-1006
Volume 50, Issue 2
Displaying 1-5 of 5 articles from this issue
  • Michiya SUZUKI, Kou-Chang HSIEH, Mitsuhiro ONO, Michitaka SUZUKI
    1988 Volume 50 Issue 2 Pages 63-71
    Published: June 30, 1988
    Released on J-STAGE: September 04, 2009
    JOURNAL FREE ACCESS
    Falling snowflakes were photographed against a dark background by two cameras, one camera measuring the falling velocity, and the other measuring the size. Based on these results the microwave attenuation coefficients of sleet were calculated over a wide range of microwave frequencies and air temperatures. The terminal velocity of falling snowflakes is considered to be important in the interpretation of attenuation coefficients, particularly those of sleet snow-flakes. From the aerodynamic point of view, the terminal velocity of snowflakes is presumed to depend upon their size, shape and density. That is, we can express the terminal velocity of spherical snowflakes in terms of drag coefficient of snowflakes, gravitational acceleration and density of air.
    We re-examined the drag coefficient of snowflakes, and made a trial at a new calculation. This paper presents the new method to calculate falling velocity of high density snowflakes. In the results, there was a good quantitative agreement between the observational and calculation results.
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  • X. Development of a household snow feeder
    Teruyoshi UMEMURA, Fuminori KAMEMIZU, Kazuo MINENO, Akira HATAKEYAMA, ...
    1988 Volume 50 Issue 2 Pages 72-79
    Published: June 30, 1988
    Released on J-STAGE: September 04, 2009
    JOURNAL FREE ACCESS
    A household snow feeder was designed, and tested in an alley in Nagaoka City in order to develop a snow removing system for urban use. The structure, composed of a 330 liter tank with a vertical stirring paddle and a slurry pump to feed snow into a pipeline, proved to be safe for ordinary domestic use by women. Data are presented on capacity and power required for designing a snow feeder, and comparison is made with the larger horizontal type machine developed in the Fukui station.
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  • Junsei KONDO, Yoichi NUMATA
    1988 Volume 50 Issue 2 Pages 80-86
    Published: June 30, 1988
    Released on J-STAGE: September 04, 2009
    JOURNAL FREE ACCESS
    Variation of the surface snow density with time in the top few centimeters of snow cover was parameterized on the basis of viscous compression theory. A compactive viscous factor is expressed as a function of the snow density and of the mean air temperature. The results show that the snow density increases with time after the last snowfall and that the rate of in-crease for high air temperature cases is greater than that for low air temperature cases. Good. agreement (within±0.05 g cm-3) was found between the calculated snow density and the observed one.
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  • [in Japanese]
    1988 Volume 50 Issue 2 Pages 87-91
    Published: June 30, 1988
    Released on J-STAGE: September 04, 2009
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1988 Volume 50 Issue 2 Pages 92-96
    Published: June 30, 1988
    Released on J-STAGE: September 04, 2009
    JOURNAL FREE ACCESS
    Download PDF (942K)
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