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Volume 9 (1958 - 1959･･･
- Issue 3-4 Pages 123-
- Issue 2 Pages 51-
- Issue 1 Pages 1-
Volume 9, Issue 1
Displaying 1-7 of 7 articles from this issue
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S. Kubota1958 Volume 9 Issue 1 Pages 1-14
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSA method to solve the ω-equation by use of the inverse matrices was proposed in my previous study. Using the observed data, the stability and representative scale appearing in the matrices could be determined. In this paper, the surface pressure change was calculated by the simplified baroclinic model, in which the value of the vertical velocity ω was calculated by the method stated in the previous paper.
It was found from the results thus calculated, that the developm ent of the low pressure area can be easily predicted, provided that the cause of that development is attributable to the upper disturbances such as can be seen in the “Japan Sea cyclone.”
Further, the magnitudes of the effects of convergence and the vertical transport of the absolute vorticity by the vertical velocity and others were also examined.View full abstractDownload PDF (2199K) -
T. Asakura, A. Katayama1958 Volume 9 Issue 1 Pages 15-24
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSRelation between solar activity and variations of the general circulation is investigated by using data during winter of 1946-1956. K-and Ci-index, which are measures of geomagnetic activity, are used to represent solar activity. As indices to represent a hemispheric flow pattern, kinetic energy of 5-day mean north-south wind component and amplitudes of each harmonic wave along 50° latitude circle are used. Summarizing the results, ten days or so after an intense sporadic outburst of corpuscular emission from the sun, a circulation pattern seems to change into a low index type and heat exchange along the meridian is intensified. A typical example of intense corpuscular emission and the subsequent change of the circulation pattern was observed in the middle of February 1958, when a recordbreaking intensity of aurora was observed in many countries including abnormally low latitudes.View full abstractDownload PDF (1547K) -
H. Arakawa1958 Volume 9 Issue 1 Pages 25-28
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSInvestigation has shown that the clear-air turbulence encountered by aircraft appears to occur (1) bellow the jet isotach-max and on its north, or cyclonic, side; and (2) above the jet isotach-max and on its south, or anticyclonic, side. Through the use of two stability criteria which have been given by the present author, one might hope to arrive at an explanation for the phenomenon of clear-air turbulence.View full abstractDownload PDF (525K) -
M. Kobayashi, N. Kitagawa, T. Ikeda, Y. Sato1958 Volume 9 Issue 1 Pages 29-34
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESSField-change due to lightning flashes is recorded by using simultaneously an electric fluxmeter and an amplifier oscillograph of WATSONWATT and APPLETON'S type. At the same time, time-variation of the illumination of the whole sky due to flashes is recorded by means of photomultipliers and a cathode-ray oscillograph.
In case of flashes to the ground, they emit weak light continuously during their leader processes, while their return strokes are observed as instant and brightest bursts of light. Throughout the periods between and after the strokes, a number of fairly bright bursts of light having the duration of 1 to 2 m-sec occur successively at th e intervals of about 4 to 30 m-sec.
In case of cloud flash e s, fairly bright bursts occur similarly throughout their whole duration. When the field-change of the leader type is recorded in a part of their duration, weak and continuous luminosity is observed in accordance with this field-change. These bright bursts of light observed both in flashes to the ground and in cloud flashes are caused by discharge processes which produce small rapid field-changes named K-change by one of the authors.
It has been made clear that in the discharge pr o cess of this type, the brighter burst of light is associated with the discharge process in which the rate and the frequency of the current change are higher.View full abstractDownload PDF (1877K) -
E. Suzuki1958 Volume 9 Issue 1 Pages 35-39
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESS -
M. Fujiwara, K. Toya1958 Volume 9 Issue 1 Pages 40-47
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESS -
Y. Miyake, Y. Sugiura1958 Volume 9 Issue 1 Pages 48-50
Published: September 30, 1958
Released on J-STAGE: December 11, 2012
JOURNAL FREE ACCESS
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