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Volume 2 (1951)
- Issue 3-4 Pages 219-
- Issue 2 Pages 117-
- Issue 1 Pages 1-
Volume 2, Issue 3-4
Displaying 1-14 of 14 articles from this issue
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S. Ooi, S. Matsumoto, H. Itoo1951 Volume 2 Issue 3-4 Pages 219-233
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSVertical sti. ucture of upper westerly trough near Japan in January 1950 is investigated. Movement of tropopause, inversion layer and cold front, and variation of temperature are in spected. Attentions are paid especially to variation of stratification, distribution of solenoid field, convergence and divergence. The remarkable temperature variation in upper trough may be explained by vertical motion.View full abstractDownload PDF (2641K) -
Analyses of the Typhoons Jane and KeziaY. Masuda, M. Takeuchi1951 Volume 2 Issue 3-4 Pages 234-262
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSFrom a dynamical point of view, three dimensional analyses of the typhoons Jane and Kezia, that is, the analysis of the pressure field, the temperature field, the tropopause and the stream lines, etc. are performed, and a typhoon model deduced from these analyses is proposed. It is concluded that the typhoon is not a simple convective system, but a system superposed by a few dynamical secondary convective systems, and each meteorological element corresponds to the distribution of thes e systems.View full abstractDownload PDF (5059K) -
S. Matsumoto1951 Volume 2 Issue 3-4 Pages 263-267
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThe effect of non-stationary motion and eddy viscosity on the surface pressure change and moving velocity of surface pressure center is estimated.View full abstractDownload PDF (576K) -
T. Ando1951 Volume 2 Issue 3-4 Pages 268-273
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThe various kinds of energies of anticyclones which are considered as the centers of action around Japan were calculated. The meaning of the potential energy and transformations of energies in the anticyclones were discussed.View full abstractDownload PDF (646K) -
T. Yamaoka1951 Volume 2 Issue 3-4 Pages 274-284
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSReflecting on the twenty years' history of the theory of general advection it is pointed out that the subject must be dealt with as a well-defined dynamical problem, in order that that a definite unobjectionable theory might be developed. In Section 2, after making clear the process of advection and defining accurately the quantities concerned, the fundamental formulas of advection are derived, which are more comprehensive than those ever published and the meanings of several previous theories are explained. Section 3 deals with the contribution of thermal effect to the advection and Section 4 the effect of the discontinuous surface. In Section 5 new forms of advection formulas are presented, which are useful for practical purposes.View full abstractDownload PDF (1537K) -
T. Yamaoka1951 Volume 2 Issue 3-4 Pages 285-295
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSIn Part I the method of height computation on. the T log p-Diagram is studied, Among many possible forms of the height computation diagrams a simple and useful one is mentioned which is applicable as well to Herlofson's Skew T logp-Diagram. In Part II, which deals with the main subject of this report, the features to be possessed by the adiabatic diagrams are analysed and by means of the equal-area transformations of T log p-Diagram the forms of the adiabatic diagrams are studied, which satisfy these features. Tephigram, Aerogram and Tropogram are included as special cases of the results of the systematic study From among the possible diagrarfis suggested by this study a diagram, named “ log Θ, H-Diagram”, is presented, which is regarded as the simplest and most effective one.1. IntroductionView full abstractDownload PDF (6993K) -
H. Arakawa, K. Tsutsumi1951 Volume 2 Issue 3-4 Pages 296-301
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThis paper was prepared to give the general aspect of the annual changes of daily frequency of squalls in the NW-PACIFIC. The materials used here are marine data reports from the Japanese fleets and civil ships collected and compiled by the Japanese Navy, based on the same materials a contribution “ On the Visibility in the NW-PACIFIC ” has already been written by ARAKAAITA (1950)
To obtain the monthly means of daily frequency of squalls, statistics were made in the following way: the NW-PACIFIC has been divided into squares,2.5 degree longitude in width, and 2.5 degree latitude in length. Referring to the files compiled, the time intervals (in hours) required by ships to traverse each 2.5 degree square were summed up. Then, the number of squalls encountered in each of the time intervals 1h-4h, 5h-8h, 9h-12h, 13h-16h,17h-20h and 21h-24h was calculated. The result thus obtained is tabulated as follows:View full abstractDownload PDF (1621K) -
T. Sekiguti1951 Volume 2 Issue 3-4 Pages 302-310
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSConditions of surface covers play an important role as a principal factor as well as topographical features on local climates. The author made two local climatological observations on temperature distribution at the places where local differences in surface covers are remarkable and they occupy only about several square kilometers respectively.
Observations were done in the daytime of calm days in summer 1947 using several Assmann's psychrometers by means of mobile observations on foot. And we reduced each observed temperature at different time to an average condition during the observation period using a repeated observation method by the same author.
The magnitudes of temperature differences by various surface covers were recongnized with statistical significances: it was warmer at cultivated fields, bare- and bush-lands and cooler in forests, grass- and marshy-lands. Mean differences in temperature between them were usually 0.6-1.0°C.View full abstractDownload PDF (1452K) -
H. Maruyama, M. Momiyama1951 Volume 2 Issue 3-4 Pages 311-314
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSWe have applied the method of factor analysis to the problem of reducing the number of the observing parts required for the calculation of the average skin temperature of the human body.
We have analyzed the observed data on the twenty-two parts adding to them the air temperatme and the age which are considered to influence the skin temperature. It has been thus, found that the observed values were rather well collected at every part, and that air tempetatuie is actually one of the factors which controlled skin temperature.View full abstractDownload PDF (519K) -
K. Itoo1951 Volume 2 Issue 3-4 Pages 315-316
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSIce Crystals in the Air are grouped into three fundamental forms, as follows.
a) hexagonal twin-prism,
b) hexagonal prism,
c) hexagonal plate.
Each crystal grows into a skeleton-shaped form, and the hexagonal plate especially shows a beautiful variety observed under the optical microscope. Some examples of these crystals are shown in Figs.1 and 2View full abstractDownload PDF (466K) -
M. Sanuki, S. Kimura, N. Tsuda1951 Volume 2 Issue 3-4 Pages 317-333
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSSupplementary experiments to Report II (Papers in Meteorology and Geophysics, Vol. I, No.2∼4,1950) are carried out. They cover further tests on the windmill blades for the combination wind vane and anemometer, oscillation characteristics of Dines pressure tube, R. A. E. pattern wind vane and “ Windial ”, and ventilating capacities of C. M. O. -S 50 L, -S 50 M and U. S. Army type radiosonde ventilator tubes.View full abstractDownload PDF (1744K) -
S. Agari1951 Volume 2 Issue 3-4 Pages 334-338
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSThe principle and actual design of a new type of rethote reading and recording thermometer with sealed carbon filament in the capillary of mercury-in-glass thermometer is described. Owing to its simple and solid construction it is suitable for meteorological use. Its behaviour is quite the same as that of the ordinary mercury-in-glass thermometer and it is going to be used at some model stations in Japan.View full abstractDownload PDF (1536K) -
T. Sato1951 Volume 2 Issue 3-4 Pages 339-342
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSUnder four assumptions we integrated the equations of motion uniform in a direction, and obtained integrals in Cartesian coordinates, in the,x-direction of which the motion is considered. to be uniform. As in this case it is seen from the equation of con- tinuity that momentum can be expressed by applying streamsurface functions, therefore we can get two integrals: one concerning momentum and the other concerning vorticity. The integral concerning energy can not be obtained, unless we assume the pressure distribution to be stationary.
If we further assume that the motion is stationary, then we get the same integrals as those which we derived before.View full abstractDownload PDF (474K) -
T. Sato1951 Volume 2 Issue 3-4 Pages 343-345
Published: 1951
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSAdopting the following three assumptions;
(A) motion is horizontal,
(B) fluid is frictionless,
(C) fluid is autobarotropic,
we tried here to integrate the equations of motion. For the sake of simplicity, we deal first with the case;
(D) the state is stationary.
As, in this case, it is known from the equation of continuity that we can apply the stream-line function φ for the horizontal momentum, so we can once integrate the equations of motion, in which φ and the specific volume are the dependent variations, and derive two integrals expressing conservations laws, that is, the law of conservation of absolute vorticity and that of energy.
Here we treated only of the case in Cartesian coordinates.View full abstractDownload PDF (325K)
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