抄録
The temperature dependent vaporization rate for meteoric particles is applied to estimate the production profile of the upper atmospheric sodium. It is shown that the earlier result estimated using a constant temperature that controls the vaporization process for meteoric particles leads to an underestimation of the thickness of the production profile. A typical production profile of sodium calculated by taking account of a mass distribution of the meteoric particles shows the peak height of about 93km and a thickness (10-1) of about 26km. This thickness is significantly wider than that of a usually observed sodium layer, so that effective removal process of sodium is required for shaping the sodium layer.
