Journal of the Meteorological Society of Japan. Ser. II
Online ISSN : 2186-9057
Print ISSN : 0026-1165
ISSN-L : 0026-1165
Volume 29 , Issue 10
Showing 1-3 articles out of 3 articles from the selected issue
  • K. Imahori, J. Hori
    1951 Volume 29 Issue 10 Pages 327-335
    Published: 1951
    Released: February 05, 2009
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  • S. Unoki
    1951 Volume 29 Issue 10 Pages 336-346
    Published: 1951
    Released: February 05, 2009
    Assuming a simple harmonic variation of wind, the author discussd the phase-relation between non-stationary wind and the corresponding elevation of sea level, the effects of variation of wind direction and Coriolis'force on sea level, which had scarcely been investigated, by using the concept of mass transport as well as the results of his preceding paper. Moreover, he showed a method to obtain the elevation by Fourier's integral, in case of arbitrary change of wind velocity and direction with respect to place and time.
    Even when wind direction varies, the phase-difference is not generally recognized. But on the other hand, when the wind velocity varies, its direction being constant, the phase-difference is closely connected with the latidude of the place, the angle between the wind direction and coastal line, and the rate of variation of wind velocity. It seems to him that the effect of Coriolis' force on the upheaval of water surface caused by wind is unexpectedly large. For example, on account of Coriolis'force, the elevation at the shore caused by wind, whose velocity changes very slowly, is larger when the wind blows parallel to the coastal line than when it blows perpendicular to it. Moreover, the phase-difference vanishes as long as Coriolis'force is neglected.
    It is also concluded that the elevation of surface is considerably larger when the wind direction rotates clockwise than when it rotates counter-clockwise, even when the absolute value of wind velocity and the rate of variation of wind direction are equal for the two cases. Accordingly, a larger elevation occurs when a cyclone passes towards north through the west side of a bay than when it passes the east side of it.
    As an cxample, where atmospheric surface pressure and wind act simultaneously on water surface, the elevation caused by the surface pressure and the corresponding wind according to Brunt-Douglas' formula were obtained, by considering that, when the field of one of these two factors is given, the other field will be decided naturally.
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  • Y. Miyake, K. Saruhashi
    1951 Volume 29 Issue 10 Pages 347-360
    Published: 1951
    Released: February 05, 2009
    The mass distribution of atmospherie ozone on the earth was calculated assuming that distributions of ozone on the northern and southern hemispheres are approximately the same only with half a year difference of phase. Results showed that the total mass of ozone is always constant. On the other hand, calculated amount of ozone by our previous theory decreases rapidly with increasing sec z. Therefore, meridional distribution of photochemically formed ozone and that observed are quite different, but the total mass is equal to the latter and it becomes also constant on the whole earth. We considered that initial distributions are decided photochemically and actual distributions are formed secondly by pole-ward transports of ozone in the stratosphere. The speed and direction of the transport and their seasonal variations were estimated by which the annual and meridional variation of ozone could be explained reasonably.
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