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Volume 3 (1952 - 1953･･･
- Issue 4 Pages 229-
- Issue 3 Pages 175-
- Issue 2 Pages 77-
- Issue 1 Pages 1-
Volume 3, Issue 2
Displaying 1-8 of 8 articles from this issue
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M. Ogawara, H. Yamazaki1952 Volume 3 Issue 2 Pages 77-93
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSIn this paper, it is pointed out firstly that the so-called objective method of drawing isolines which is based on the method of least squares can be generalized but that it is disadvantageous in practice. As an alternative, a method based on the simultaneous confidence region of true value at each station is proposed. What has the objective meaning is the confidence region by which the existence region of isolines is provided. Especially, the confidence interval of proportional division point of two adjacent stations can be easily found by a graphical method. A definite set of isolines may be drawn arbitrarily in the restricted limit, by considering several points in each local area successively. The method is developed for two cases; the one concerns the distribution of mean values and the other the directly observed values. In the former the only assumption is that every set of random fluctuations of simultaneously observed values submits to the same multivariate normal probability distribution law, and in the latter the assumption that the covariances of observed values are known must be added.View full abstractDownload PDF (2171K) -
K. Sekihara1952 Volume 3 Issue 2 Pages 94-103
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSFormulae of primary and secondary scattered sky radiationwith an infinitely thin absorption layer and that of finite thicknesswere deduced starting from the formula of uniform compositionobtained in the previous paper by the present author.Numerical values of functions necessary to calculate the formulaewere tabulated.View full abstractDownload PDF (1119K) -
K. Kamlyania, M. Moriguchi1952 Volume 3 Issue 2 Pages 104-114
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSBy using a fibre of artificial resin (radius 2μ), the authors investigated the size distribution curve of fog particles and its variation. Some theoretical consideration was also given in the region of 1.2μ-1.5μ in wave length and the infra-red absorption coefficient is estimated to be 1.4%.View full abstractDownload PDF (2068K) -
M. Sanuki1952 Volume 3 Issue 2 Pages 115-124
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThe equation of motion of the float system in Dines pressure tube established first by S. IKEDA and corrected by the present author is compared with that given by SCHRENK for cupanemometer. The over-estimation factor of integrated record, under-estimation and phase-lag factor of peak indication are obtained by the graphical integration of the equation of motion for the pressure tube exposed in fluctuating winds, if the definition of SCHRENK'S parameter is extended to it. The effect of float inertia may safely be neglected. Experiments on the pressure tube, which is started from rest in the wind tunnel, or brought to rest in a still air, are conducted to determine the “SCHRENK'S parameter” for various piping conditions.View full abstractDownload PDF (1346K) -
K. Isono, E. Hayashi1952 Volume 3 Issue 2 Pages 125-137
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThe characteristics of th e thermistor psychrograph for the sounding of the lower atmosphere has been studied. The time lag constant of thermistors and their psychrometric constant under various ventilation condition were determined. The effect of solar radiation on the temperature of thermistors in radiation shield was studied., Several results of the Eo-mding with a captive balloon are discussed.View full abstractDownload PDF (2480K) -
Y. Masuda1952 Volume 3 Issue 2 Pages 138-156
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSMainly, from the analysis of vorticity in the case of the typhoon, it is found that small perturbations superpose upon the circular vortex seemingly uniform at a glance, and that they travel as wave-motions. Furthermore, as an attempt to explain this phenomenon, approximate solutions of the perturbation equation of the circular vortex whose basic currents are gradient winds, are obtained, and this theoretical result is com pared with the analysis.View full abstractDownload PDF (2537K) -
T. Sato1952 Volume 3 Issue 2 Pages 157-171
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSHere was derived th e oretically the three-dimensional structure of the cold vortex satisfying the following conditions:
(A) the effect of friction can be considered to be secondary,
(B) the state is axis-symmetrical,
(C) the state is stationary,
(D) the air is aut o barotropic. The integrals derived under the above conditions were three, which express respectively the law of conservation of angular momentum, vorticity and energy.
From the last law ca n be determined the shape of the surfaces of discontinuity which can exist in a cold vortex. One of them is a surface of cold front type which stretches upward in a funnel shape sustaining a cold core in the troposphere, and the other the tropopause funnel which hangs down also in a funnel shape surrounding the upper warm core.
In the cold vortex there exist, thus, a co l d core in the lower layer containing the central axis, and a warm core which is generated by the descended stratospheric air in the upper layer. Surrounding the cores, which are rotating slowly and anticyclonically around the axis, there exists outside the funnel-shaped surfaces a tropospheric air rotating cyclonically with a large speed and containing in itself a meridional convective circulation.
As, however, the effect of friction is especially large at the surface of discontinuity, so that the outer cyclonic horizontal circulation reaches mostly to the central axis, and thus a highlevel cyclone is formed, which is represented approximately by RANKINE'S combined vortex.
The three-dimensional structure of the cold vortex thus derived will be known to be remarkably similar to that of the typhoon and that of the circumpolar vortex which we described before. It would he natural that they resemble each other, because they are all phenomena which can be explained from the same fundamental principles.View full abstractDownload PDF (2337K) -
M. Sanuki1952 Volume 3 Issue 2 Pages 172-174
Published: November 30, 1952
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThe equation of heat transfer between the thermometer and the air in which it is exposed is solved graphically, assuming the air temperature and wind velocity fluctuation to be sinusoidal and the thermometer lag coefficient to be inversely proportional to the square root of wind velocity. Two examples are given, one of which is the case of constant air temperature and variable wind velocity, and the other the case, of variable air temperature and variable wind velocity. The influence of wind velocity fluctuation upon the thermometer lag seems to be of negligible order even for large percentages of fluctuation.View full abstractDownload PDF (349K)
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