On the Effect of Temperature Distribution on the Diurnal Variation of Barometric Pressure

[摘要] When Max. Margules and others first treated the problem of the diurnal variation of barometric pressure periodically heated, they confined their discussions to the case in which the temperature distribution due to the land and sea or the latitude is out of consideration.In this paper, the author intended to investigate the influence of temperature distribution on the diurnal variation of pressure and to present a method of eliminating its e ror. But if the amplitude of the pressure waves is a function of z taken in the vertical direction as well as of x, y, the solution in the general case is difficult though not impossible. Cur case which presents itself in this paper is that the motion takes place in the horizontal plane xy only and the amplitude of pressure waves varies gradually from point to point mainly in order to get a simple solution of the equation.The results obtained in our investigation may be summarized as follows:-1. If the variation of temperature is very small, it is necessary to take the temperature at the place here considered to get rid of error in the amplitude of pressure waves.2. When the temperature decreases northwards, the amplitude of pressure waves is rather large compared with that which the variation of temperature is ignored. If the negative temperature gradient is directed toward south, the case is quite opposite.

[学科分类] 大气科学