Papers in Meteorology and Geophysics
Online ISSN : 1880-6643
Print ISSN : 0031-126X
ISSN-L : 0031-126X
Volume 13, Issue 1
Displaying 1-4 of 4 articles from this issue
  • T. Senshu
    1962 Volume 13 Issue 1 Pages 1-21
    Published: October 20, 1962
    Released on J-STAGE: December 11, 2012
    A three-dimensional analysis of a cold front with squall lines was made, using 6-hourly aerological data around Japan on 12th and 13th Dec.,1957. A squall front was analysed in front of the cold front, where the direct circulation was prominent. A strong southerly low-level jet was observed ahead of the cold front. Estimation of the order of magnitude of each term on the equation of motion was made, which showed strengthening or weakening of southerly jet υ was mainly due to the horizontal advection. As to the change of u-momentum, the ageostrophic wind component was large and comparable with the horizontal advection term.
    The actual wind followed the geostrophic one with a lag time of several hours, which caused large ageostrophic wind components.
    The pattern of the observed rain fall amount coincided with the expected one computed by the total amount of liberated heat by condensation.
    Download PDF (3018K)
  • M. Sanuki, S. Kimura, M. Baba
    1962 Volume 13 Issue 1 Pages 22-27
    Published: October 20, 1962
    Released on J-STAGE: December 11, 2012
    A spherical wind vane is one of the conceivable two-directional wind direction measuring configurations due to its complete symmetry, and a linearized equation of motion is formed. The form is quite similar to that of the ordinary wind vane, of which some discussions and a wind tunnel test are given, too. The spherical wind vane is tested in the wind tunnel concerning its drag coefficient, and oscillation behaviour. The latter is compared with that of the ordinary wind vane, and found to possess peculiar and discouraging characteristics.
    Download PDF (675K)
  • Preliminary Report
    K. Murai
    1962 Volume 13 Issue 1 Pages 28-34
    Published: October 20, 1962
    Released on J-STAGE: December 11, 2012
    For the spectral measureme n t of the global radiation, we designed an instrument using an interference filter, a multiplier phototube and a diffuser. Since the diffuser plays a very important role in maintaining the directional cosine law, we constructed it taking the utmost precaution. As the results of the experimental tests, it was shown that the integrating sphere attached to the opaque plastic plate at the exit hole of the light, represents the best charactetistics of the diffusibility. The deviation of the characteristic curve from the cosine curve is less that 5% at the incident angles from 0 to 70 deg.
    We picked out five narro w wave length intervals from near-ultra violet and visible regions. As detectors, five photomultipliers were used and their output photocurrents are recorded simultaneously.
    The response of the instrument is very sensitive to the variation of the high tension power supply and even a small fluctuation is able to cause a significant error in the recorder.
    Calibration was carried out by means of the standard lamp several times a day.
    Download PDF (1646K)
  • M. Mitsudera
    1962 Volume 13 Issue 1 Pages 35-101
    Published: October 20, 1962
    Released on J-STAGE: December 11, 2012
    It is not to mention that the meteorological phenomena are very significant environmental factors for the life of plant, but it is a rather difficult problem to clarify in what extent the factors act the role in the growing process of plant. The phytometer method, proposed as one of the methods of environmental analysis by CLEMENTSet al., does not yet work in practice, since the method is nothing more than one giving the plasiticity of plant through a consideration that “ the environmental variation reflects on the function and formation of plant, ” and then is not available for the analysis of practical process.
    The present author presents a new met h od of environmetal analysis, on the basis of the same consideration as in phytometer method, and demonstrates the through practicability of the new method for analysis for the actual cases with bamboo forest and pasture community. For example, it is clarified that the precipitation amount in June plays the major role as the first order factor in bamboo forest at Toyama Village in Chiba Pref., Japan, where was chosen as one of object sites in the present investigations. While, the thickness of surface soil is pointed out as the first order factor in the case of pasture community at Asama Village in Nagano Pref.
    Download PDF (13275K)