The effects of volcanic explosion on the climatic abnormalities are investigated statistically and synoptically. The abnormal weather during the summer season in 1954 when the large-scale H-bomb experiment was made is found to have the similar features as the climatic abnormalities caused by volcanic dust. The distribution of temperature anomalies and annual variation of it are discussed in relation to the tropospheric circulation.
Vertical flux of heat and momentum in the lowest layer, which are significant quantities in the micrometeorology, are expressed symbolically as ρCp_??_and ρ_??_ respectively, (where u' and w' are fluctuation components of velocity and T' is temperature fluctuation). Lately, due to the progress of instrumentation and calculating machine, the flux has come to be measured in its original form, that is, as the cross-correlation of two fluctuating quantities. In this procedure, it becomes a significant problem to decide the sampling time and time lag of the measuring instrument. To solve the above problem, structures of u'-, w'- and T'-fluctuations are measured and analysed. In the range of small eddies, similarity hypothesis in the locally isotropic turbulence holds well in three fluctuating quantities. The author stresses that sampling time of 1 minute, thougt it seems by far shorter than the ordinarily used one, is sufficient to cover the large eddy which is effective to the gradient diffusion. It is noted that in the large eddy which is effective to the turbulent transfer of heat, the state of turbulence deviates very far from the local isotropy.
Measurements of the electrical current in the mooring wire of the captive balloon and of the electrical conductivity in the lower atmosphere were carried out from January to October, 1953 at Honjo, Saitama-Prefecture. We observed these two elements in the fair weather nights. The meteorological phenomena in calm days have been considered to have smaller influence on the atmospheric electricity. But from our results, it is considered that the potential gradients at the ground surface are remarkably affected by the meteorological phenomena-nocturnal inversions-in calm nights.
The results of the numerical forecasting over the Far East is presented. In this paper, we use double Fourier series in order to calculate the Jacobian of vorticity ζ and the height of isobaric surface Z and also to solve the Poisson equation. As the preliminary report we explain mainly the detailed technique of our method how to treat and apply. It is also shown that the results of numerical forecasting will be improved, if we take shorter time interval of each step. In connection with this problem, the outline of the relay-computer (FACOM-100) which is available is written briefly.