The sunspot activity and the semidiurnal oscilation of the atmospheric pressure

[摘要] The author has special interest on the relation between the sunspot activity and the motion of upper atmosphere. He already pointed out the increase of westward component of cirrus movement in southern and central Japan.(1) As the semi-diurnal term in the barometric daily oscilation concerns mainly to the upper atmcsphere, he, for the present, compares the secular variation of the amplitude and phase of the said term in Tokyo (obtained by harmonic analysis) with sunspots activity and mean annual direction of motion of upper and middle clouds. The curves are shown in fig. l. p. 47. Numerical values are tabulated in the table in p. 48. With these we can see that between these elements a certain correlation, though not perfect, exists-positive correlation between spots and semidiurnal oscilation and negative one between these and the eastward compornent of upper cloud motion.

[学科分类] 大气科学