Journal of the Meteorological Society of Japan. Ser. II
Online ISSN : 2186-9057
Print ISSN : 0026-1165
ISSN-L : 0026-1165
Volume 37 , Issue 5
Showing 1-8 articles out of 8 articles from the selected issue
  • M. Oi
    1959 Volume 37 Issue 5 Pages 137-146
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    The periodic solution of the governing differential equation of steady topographical perturbation of a zonal current, which is obtained in the previous papers without taking into account of latitudinal variation of Coriolis' parameter, is applied to compute the streamlines of zonal current over the Northern Hemisphere zone by zone from 75 deg N to 15 deg N in comparison with the actual Normal Contour Chart. Distributions of horizontal velocity divergence and vertical component of vorticity accompanied by these computed streamlines are discussed together with La Seur's deviation of circulation center.
    Download PDF (1508K)
  • Masamichi Oi
    1959 Volume 37 Issue 5 Pages 147-159
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    The neglectability of Reynolds term in the dimensionless equation of motion for the large scale topographical perturbation of a zonal current is ascertained in the atmospheric prototype and dishpan model for two-dimensional barrier case and consequently for threedimensional barrier case also. Thus the only one dimensionless parameter turns out to be the Rossby's one, provided that the ratio of the topographical height to the homogeneous atmospheric height is equal to that of the height of barrier model to the depth of rotating fluid in the rotating dishpan even in three-dimensional barrier case.
    The different rotating-speed at each latitude on the atmospheric prototype can be simulated even in the rotating dishpan by multiplying the topographical height by the sine of latitude (sinφ).
    Thus the northern hemispherical circulation can be simulated in the rotating dishpan for several cases of different meridional distribution of basic zonal current and is to be compared with 500mb normal contour charts with corresponding meridional distribution of basic zonal current to verify the rightness of the author's theoretical conclusions. However, in this paper, only one case of distribution of basic zonal current is reported, simply because mechanical devices to produce other cases have been undone from the financial reason.
    Download PDF (4938K)
  • J. Sakagami, M. Mochizuki, M. Ishige, S. Nakagawa
    1959 Volume 37 Issue 5 Pages 160-163
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    Using a hot-wire anemometer with a very small time-constant and a cathode-ray oscillograph, the wind speed in every 1/400 sec was observed, from which the auto-correlation and the power spectra were calculated. The results of the theory of local isotropy do not seem to be applicable to the present observation.
    Download PDF (319K)
  • Kazuo Watanabe
    1959 Volume 37 Issue 5 Pages 164-189
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    The meteorology in the border area between the cloud physics and synoptics, and the method how to combine both knowledges in the technics of weather forecasting are all hitherto left untouched.
    Using the idea proposed by Ligda about the aftereffect of a thunderstorm, the author attempted to construct a technic which was named “ Hygrokinematical analysis” by Ligda. This technic starts with the assumptions that the vertically developed cloud will disintegrate to stratiform clouds of several layers. The clouds will flow away by the winds at each level maintaining it's cloud form and high liquid water content as far it takes the way of upsloping. The procedure of the analysis used in this paper are as follows: 1) identify the storm groups from the hourly precipitation report and the radar observation, 2) obtain the future positions of the clouds or moist air masses which have positioned at the storm groups by computing their trajectories at 500, 700, and 850-mb levels. 3) estimate the most probable weather from the configurations of trajected clouds and moist air at the three levels under the assumptions about the growth and dissipation of rain particle. The vertical component of the trajectory (distribution of Z-component of flow) and the influence of radiation (solar and nocturnal) to precipitation also be considered in this stage. The case study of this technic are made for six different storm cases, and obtained very satisfactory results except one case which showed big wind shear. These case study also showed good explanation about the phenomenon of bad weather persist in a cold air pool and of the rain systems near a hurricane. This technic will best suitable for the very short range weather forecasting from 3-hour and up to 15 or 18-hour ahead. Isentropic trajectories are also constructed and compared with constant pressure level trajectories.
    Download PDF (4574K)
  • T. Kashiwagi
    1959 Volume 37 Issue 5 Pages 190-200
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    Applying factor analyses, one of multivariate analyses, to tests of several biological functions, the author seeked for variation of linear transformed variates of tests when cold fronts passed through. From the previous observations on individuals, two independent components were extracted as function units. These and those components exhibited the particular mode of change during front passing as a whole. The 1st component, consisted of body temperature and heart beat interval, reduced markedly on frontal days and increased after front passing. The 2nd component, which was independent to the 1st component and refered to blood pressure, increased gradually at the course of front passing.
    Since in this observation each component consisted of at least two characteristics and simultaneous changes of the constituents were amalgamated into one variate, these results bases on the multivariate method seems to explain more precisely the biological regulation mechanism than the results obtained from single characteristic.
    The correlation between each component and common meteorological factors was almost negligible. To obtain significant figures between meteorological and biological processes, synthetic characteristic of cold front and other meteorological conditions should be taken into consideration.
    Download PDF (1560K)
  • K. Itagaki, S. Koenuma
    1959 Volume 37 Issue 5 Pages 201-202
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    Download PDF (180K)
  • Iwao Tsuchiya
    1959 Volume 37 Issue 5 Pages 203-208
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
  • C. MAGONO, T. TAKAHASHI
    1959 Volume 37 Issue 5 Pages 209
    Published: December 25, 1959
    Released: October 19, 2007
    JOURNALS FREE ACCESS
    Download PDF (418K)
feedback
Top