中层大气臭氧的全日盘掩日测量

Full-Disk Solar Occultation Measurements of Ozone Profiles in the Middle Atmosphere

本文研究了日盘张角对掩日测量的影响,引进了日盘光辐射空间变化特性这一先验信息,提出了从全日盘掩日测量反演中层大气臭氧含量的新方法.数值模拟试验指出,这一方法可以满意地给出25—65km高度范围内大气臭氧的垂直分布。当测量吸收比的均方根噪声为0.01时,其反演误差小于10％.利用这一方法,可以大大简化探测系统、降低测量对遥感平台的要求.

In this paper, the effect of solar angular diameter on solar occultation measurements is discussed. A prior information on the spatial variation characteristics of UV radiation in solar disk is introduced. A new method of retrieving ozone concentration in the middle atmosphere from full-disk solar occultation measurements is developed. The results of numerical experiments show that this method can obtain a satisfactory profile of the atmospheric ozone in the layer of 25- 65 km. The inversion error of ozone concentration is less than 10% if the RMS noise of the measured absorptance is equal to 0.01. Using this method, the detecting instrument can be simplified greatly and the requirements for remote sensing platform can also be loosen obviously.