@article{oai:fukuyama-u.repo.nii.ac.jp:00007734, author = {河野, 俊彦 and 今井, 光祐}, journal = {福山大学工学部紀要}, month = {}, note = {P(論文), In this paper, the simulated electric field under a thundercloud and the condition of thresholdfield for lightning struck are described. The electric field was calculated with boundary conditions of 0 voltage and 15kV/m at the surface of the earth. In this simulation,an ion layer stayed at the midgap between the earth and the bottom of thundercloud became to be necessary to get the threshold field intensity for the breakdown in the atmosphere. The threshold field intensity is formularized as the function of the pressure and temperature according to the height from the sea level. And, two formulae are shown ; one for summer and one for winter.}, pages = {1--7}, title = {計算機による雷雲下の電界シミュレーションと落雷条件の検討}, volume = {10}, year = {1988} }