(i) Discussion of the criterion of horizontal stability in frontal zone. Estimating the magnitude of each factor in determining horizontal stability in frontal zone, we obtained the following simple results: where l denothes the horizontal velocity gradient and β the angle that the frontal zone makes with the meridional circle. From the above formula, we have derived the relation between the width of the frontal zone and latitude. (ii) Stability of secondary discontinuity produced between two cyclones. Using the above criterion, we discussed the orientation of the secondary discontinuity produced between two cyclones.
In order to supply the sensitive barograph for general use, two types were newly designed and tested by the author. The one is the statoscope type of Richard and a spiral bimetall is used as the compensator for the influence of temperature as shown in Fig. 3 The other is the same type as the usual barograph (Fig. 1), but has three aneroid boxes. The former is less satisfactory than the latter, for the recording pen is unstable owing to the flexibitlity of the highly, sensityive thin bimetall. The latter is more handy, and shows good results. The magnifying power is ten times (the pressure difference of 1mm Hg corresponds to 10mm on the recording paper) and the thermal error can easily be removed by the use of ordinary bimetalls.
Studies of the Relations between teh Yield of Chief Crops and the Weather Factors in Japan. No.11. The equation for estimating the yield of barley from the weather factors which are closely correlated with the yield is obtained by the method reported in a previous number of this journal for each prefecture in Japan. The mean error of the estimated yield is larger than 10% in Miyagi, Osaka, Wakayam, kagawa, and Kagosima prefectures, and smaller than 5% in Gumma, Isikawa, Siga, and Tottori prefectures. (see fig. 1.). Its mean value for all the prefectures in Japan is 7.3%. The results of the present study will be very useful for forecasting the yield of barley.
The present paper treats of the wind conditions around the continent of Australia on the basis of the pilot charts of the Indian Ocena, regularly issued by the Hydrographic Office of the U. S. Navy Department. They contain wind roses for five degree squares estimated on what we call the “Scott” scale. The actual average air transport into the continent of Australia has been found by the process which is quite similar with Werenskiold's(1). The mean direction and velocity of the wind were found and represented in vectorial form in Figs. 3-6 and tabulated in Table 1. The total amount of mean monthly air transport into the continent of Australia was found to be where the average air transport is assumed to be the same throughout the lowest 1km layer. Of course, the air transport flowing into the continent must be compensated by the diverging air transport over the continent.
Diagrams for prediction of the local mean time of sunrise and sunset in the whole world were constucted (Fig. 1-Fig. 8) for the 1st, 11th, 15th and 21st day of each month. A numerical table was given for reducing these local mean times to any standard meridian. Another and more convenient correction diagram was given in Fig. 9 for the particular purpose of reducing them to the Japanese standard time of 135°E meridian.
Die Oberfläche des Noziri-sees beträgt 4.10km2, seine grösste Tiefe liegt bei 38.5m. Der Verfasser hat in der Zeit vom 22. VI 1941 bis zum 19. X 1941 5-mal den Extinktionskoeffizienten des Lichtes in seiner vertikalen Verteilung untersucht. Dabei ergab sich, dass in der Tiefe von etwa 24m ständig eine dicke klare Schicht vorhanden ist, während in einer Tiefe von etwa 10m eine trübungsschicht deutlich wahrnehmbar ist. Im Verlauf der Zeit vertieft sich diese trübungsschicht sehr langsam. Ausser diesen beiden grossen Schichten lässt sich noch eine kleine klare Schicht in der Tiefe von ungefähr 4m wahrnehmen.